├── .dockerignore
├── .github
    └── workflows
    │   ├── docker-publish.yml
    │   └── test.yml
├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── Dockerfile
├── LICENSE
├── README.md
├── examples
    ├── .gitignore
    ├── binary-echo
    │   ├── .cargo
    │   │   └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   └── src
    │   │   └── lib.rs
    ├── clock
    │   ├── .cargo
    │   │   └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   └── src
    │   │   └── lib.rs
    ├── counter-service
    │   ├── .cargo
    │   │   └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   └── src
    │   │   └── lib.rs
    ├── cpu-hog
    │   ├── .cargo
    │   │   └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   └── src
    │   │   └── lib.rs
    ├── echo-server
    │   ├── .cargo
    │   │   └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   ├── dist
    │   │   └── server.wasm
    │   └── src
    │   │   └── lib.rs
    └── randomness
    │   ├── .cargo
    │       └── config
    │   ├── Cargo.lock
    │   ├── Cargo.toml
    │   └── src
    │       └── lib.rs
├── stateroom-cli
    ├── Cargo.toml
    ├── README.md
    └── src
    │   ├── bin
    │       └── stateroom.rs
    │   ├── build_util.rs
    │   ├── cli_opts.rs
    │   ├── commands
    │       ├── build.rs
    │       ├── dev.rs
    │       ├── mod.rs
    │       └── serve.rs
    │   ├── config.rs
    │   └── lib.rs
├── stateroom-server
    ├── Cargo.toml
    └── src
    │   ├── lib.rs
    │   └── server.rs
├── stateroom-wasm-host
    ├── Cargo.toml
    ├── README.md
    └── src
    │   ├── lib.rs
    │   ├── wasm_host.rs
    │   └── wasm_host_factory.rs
├── stateroom-wasm
    ├── Cargo.toml
    ├── README.md
    ├── src
    │   └── lib.rs
    └── stateroom-wasm-macro
    │   ├── Cargo.toml
    │   ├── README.md
    │   └── src
    │       └── lib.rs
└── stateroom
    ├── Cargo.toml
    └── src
        ├── client_id.rs
        ├── lib.rs
        ├── message_recipient.rs
        └── messages.rs


/.dockerignore:
--------------------------------------------------------------------------------
1 | **/target
2 | 
3 | 


--------------------------------------------------------------------------------
/.github/workflows/docker-publish.yml:
--------------------------------------------------------------------------------
 1 | name: Build and push image
 2 | 
 3 | on:
 4 |   push:
 5 |     branches: [ main ]
 6 |     tags: [ 'v*.*.*' ]
 7 |   pull_request:
 8 |     branches: [ main ]
 9 | 
10 | env:
11 |   REGISTRY: ghcr.io
12 |   IMAGE_NAME: ${{ github.repository }}
13 | 
14 | jobs:
15 |   build:
16 |     runs-on: ubuntu-latest
17 |     permissions:
18 |       contents: read
19 |       packages: write
20 |       id-token: write
21 | 
22 |     steps:
23 |       - name: Checkout repository
24 |         uses: actions/checkout@v2
25 | 
26 |       - uses: depot/setup-action@v1
27 | 
28 |       - name: Log into registry ${{ env.REGISTRY }}
29 |         if: github.event_name != 'pull_request'
30 |         uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
31 |         with:
32 |           registry: ${{ env.REGISTRY }}
33 |           username: ${{ github.actor }}
34 |           password: ${{ secrets.GITHUB_TOKEN }}
35 | 
36 |       - name: Extract Docker metadata
37 |         id: meta
38 |         uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
39 |         with:
40 |           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
41 |           tags: |
42 |             type=sha,enable=true,priority=100,prefix=sha-,suffix=,format=short
43 |             type=raw,value=latest
44 | 
45 |       - name: Build and push Docker image
46 |         id: build-and-push
47 |         uses: depot/build-push-action@v1
48 |         with:
49 |           project: 58j0517pw2
50 |           context: .
51 |           push: ${{ github.event_name != 'pull_request' }}
52 |           platforms: linux/amd64,linux/arm64
53 |           tags: ${{ steps.meta.outputs.tags }}
54 |           labels: ${{ steps.meta.outputs.labels }}
55 | 


--------------------------------------------------------------------------------
/.github/workflows/test.yml:
--------------------------------------------------------------------------------
 1 | name: test
 2 | 
 3 | on:
 4 |   push:
 5 |     branches: [ main ]
 6 | 
 7 | env:
 8 |   CARGO_TERM_COLOR: always
 9 | 
10 | jobs:
11 |   build:
12 |     runs-on: ubuntu-latest
13 | 
14 |     steps:
15 |     - uses: actions/checkout@v2
16 |     - name: Update rust
17 |       uses: actions-rs/toolchain@v1
18 |       with:
19 |           toolchain: stable
20 |           override: true
21 |     - name: Run tests
22 |       run: cargo test
23 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | target
2 | 


--------------------------------------------------------------------------------
/Cargo.lock:
--------------------------------------------------------------------------------
   1 | # This file is automatically @generated by Cargo.
   2 | # It is not intended for manual editing.
   3 | version = 3
   4 | 
   5 | [[package]]
   6 | name = "addr2line"
   7 | version = "0.22.0"
   8 | source = "registry+https://github.com/rust-lang/crates.io-index"
   9 | checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
  10 | dependencies = [
  11 |  "gimli 0.29.0",
  12 | ]
  13 | 
  14 | [[package]]
  15 | name = "adler"
  16 | version = "1.0.2"
  17 | source = "registry+https://github.com/rust-lang/crates.io-index"
  18 | checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
  19 | 
  20 | [[package]]
  21 | name = "ahash"
  22 | version = "0.8.11"
  23 | source = "registry+https://github.com/rust-lang/crates.io-index"
  24 | checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
  25 | dependencies = [
  26 |  "cfg-if",
  27 |  "once_cell",
  28 |  "version_check",
  29 |  "zerocopy",
  30 | ]
  31 | 
  32 | [[package]]
  33 | name = "aho-corasick"
  34 | version = "1.1.3"
  35 | source = "registry+https://github.com/rust-lang/crates.io-index"
  36 | checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
  37 | dependencies = [
  38 |  "memchr",
  39 | ]
  40 | 
  41 | [[package]]
  42 | name = "ambient-authority"
  43 | version = "0.0.2"
  44 | source = "registry+https://github.com/rust-lang/crates.io-index"
  45 | checksum = "e9d4ee0d472d1cd2e28c97dfa124b3d8d992e10eb0a035f33f5d12e3a177ba3b"
  46 | 
  47 | [[package]]
  48 | name = "android_system_properties"
  49 | version = "0.1.5"
  50 | source = "registry+https://github.com/rust-lang/crates.io-index"
  51 | checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
  52 | dependencies = [
  53 |  "libc",
  54 | ]
  55 | 
  56 | [[package]]
  57 | name = "anstream"
  58 | version = "0.6.15"
  59 | source = "registry+https://github.com/rust-lang/crates.io-index"
  60 | checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
  61 | dependencies = [
  62 |  "anstyle",
  63 |  "anstyle-parse",
  64 |  "anstyle-query",
  65 |  "anstyle-wincon",
  66 |  "colorchoice",
  67 |  "is_terminal_polyfill",
  68 |  "utf8parse",
  69 | ]
  70 | 
  71 | [[package]]
  72 | name = "anstyle"
  73 | version = "1.0.8"
  74 | source = "registry+https://github.com/rust-lang/crates.io-index"
  75 | checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
  76 | 
  77 | [[package]]
  78 | name = "anstyle-parse"
  79 | version = "0.2.5"
  80 | source = "registry+https://github.com/rust-lang/crates.io-index"
  81 | checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
  82 | dependencies = [
  83 |  "utf8parse",
  84 | ]
  85 | 
  86 | [[package]]
  87 | name = "anstyle-query"
  88 | version = "1.1.1"
  89 | source = "registry+https://github.com/rust-lang/crates.io-index"
  90 | checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
  91 | dependencies = [
  92 |  "windows-sys 0.52.0",
  93 | ]
  94 | 
  95 | [[package]]
  96 | name = "anstyle-wincon"
  97 | version = "3.0.4"
  98 | source = "registry+https://github.com/rust-lang/crates.io-index"
  99 | checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
 100 | dependencies = [
 101 |  "anstyle",
 102 |  "windows-sys 0.52.0",
 103 | ]
 104 | 
 105 | [[package]]
 106 | name = "anyhow"
 107 | version = "1.0.86"
 108 | source = "registry+https://github.com/rust-lang/crates.io-index"
 109 | checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 110 | 
 111 | [[package]]
 112 | name = "arbitrary"
 113 | version = "1.3.2"
 114 | source = "registry+https://github.com/rust-lang/crates.io-index"
 115 | checksum = "7d5a26814d8dcb93b0e5a0ff3c6d80a8843bafb21b39e8e18a6f05471870e110"
 116 | 
 117 | [[package]]
 118 | name = "async-trait"
 119 | version = "0.1.82"
 120 | source = "registry+https://github.com/rust-lang/crates.io-index"
 121 | checksum = "a27b8a3a6e1a44fa4c8baf1f653e4172e81486d4941f2237e20dc2d0cf4ddff1"
 122 | dependencies = [
 123 |  "proc-macro2",
 124 |  "quote",
 125 |  "syn 2.0.77",
 126 | ]
 127 | 
 128 | [[package]]
 129 | name = "autocfg"
 130 | version = "1.3.0"
 131 | source = "registry+https://github.com/rust-lang/crates.io-index"
 132 | checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 133 | 
 134 | [[package]]
 135 | name = "axum"
 136 | version = "0.7.5"
 137 | source = "registry+https://github.com/rust-lang/crates.io-index"
 138 | checksum = "3a6c9af12842a67734c9a2e355436e5d03b22383ed60cf13cd0c18fbfe3dcbcf"
 139 | dependencies = [
 140 |  "async-trait",
 141 |  "axum-core",
 142 |  "base64 0.21.7",
 143 |  "bytes",
 144 |  "futures-util",
 145 |  "http",
 146 |  "http-body",
 147 |  "http-body-util",
 148 |  "hyper",
 149 |  "hyper-util",
 150 |  "itoa",
 151 |  "matchit",
 152 |  "memchr",
 153 |  "mime",
 154 |  "percent-encoding",
 155 |  "pin-project-lite",
 156 |  "rustversion",
 157 |  "serde",
 158 |  "serde_json",
 159 |  "serde_path_to_error",
 160 |  "serde_urlencoded",
 161 |  "sha1",
 162 |  "sync_wrapper 1.0.1",
 163 |  "tokio",
 164 |  "tokio-tungstenite",
 165 |  "tower",
 166 |  "tower-layer",
 167 |  "tower-service",
 168 |  "tracing",
 169 | ]
 170 | 
 171 | [[package]]
 172 | name = "axum-core"
 173 | version = "0.4.3"
 174 | source = "registry+https://github.com/rust-lang/crates.io-index"
 175 | checksum = "a15c63fd72d41492dc4f497196f5da1fb04fb7529e631d73630d1b491e47a2e3"
 176 | dependencies = [
 177 |  "async-trait",
 178 |  "bytes",
 179 |  "futures-util",
 180 |  "http",
 181 |  "http-body",
 182 |  "http-body-util",
 183 |  "mime",
 184 |  "pin-project-lite",
 185 |  "rustversion",
 186 |  "sync_wrapper 0.1.2",
 187 |  "tower-layer",
 188 |  "tower-service",
 189 |  "tracing",
 190 | ]
 191 | 
 192 | [[package]]
 193 | name = "backtrace"
 194 | version = "0.3.73"
 195 | source = "registry+https://github.com/rust-lang/crates.io-index"
 196 | checksum = "5cc23269a4f8976d0a4d2e7109211a419fe30e8d88d677cd60b6bc79c5732e0a"
 197 | dependencies = [
 198 |  "addr2line",
 199 |  "cc",
 200 |  "cfg-if",
 201 |  "libc",
 202 |  "miniz_oxide",
 203 |  "object",
 204 |  "rustc-demangle",
 205 | ]
 206 | 
 207 | [[package]]
 208 | name = "base64"
 209 | version = "0.21.7"
 210 | source = "registry+https://github.com/rust-lang/crates.io-index"
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 212 | 
 213 | [[package]]
 214 | name = "base64"
 215 | version = "0.22.1"
 216 | source = "registry+https://github.com/rust-lang/crates.io-index"
 217 | checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 218 | 
 219 | [[package]]
 220 | name = "bincode"
 221 | version = "1.3.3"
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 223 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 224 | dependencies = [
 225 |  "serde",
 226 | ]
 227 | 
 228 | [[package]]
 229 | name = "bitflags"
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 242 | 
 243 | [[package]]
 244 | name = "bumpalo"
 245 | version = "3.16.0"
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 248 | 
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 250 | name = "byteorder"
 251 | version = "1.5.0"
 252 | source = "registry+https://github.com/rust-lang/crates.io-index"
 253 | checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 254 | 
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 260 | 
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 266 | dependencies = [
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 269 | 
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 275 | dependencies = [
 276 |  "cap-primitives",
 277 |  "cap-std",
 278 |  "io-lifetimes",
 279 |  "windows-sys 0.52.0",
 280 | ]
 281 | 
 282 | [[package]]
 283 | name = "cap-primitives"
 284 | version = "3.2.0"
 285 | source = "registry+https://github.com/rust-lang/crates.io-index"
 286 | checksum = "6d00bd8d26c4270d950eaaa837387964a2089a1c3c349a690a1fa03221d29531"
 287 | dependencies = [
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 290 |  "io-extras",
 291 |  "io-lifetimes",
 292 |  "ipnet",
 293 |  "maybe-owned",
 294 |  "rustix",
 295 |  "windows-sys 0.52.0",
 296 |  "winx",
 297 | ]
 298 | 
 299 | [[package]]
 300 | name = "cap-rand"
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 304 | dependencies = [
 305 |  "ambient-authority",
 306 |  "rand",
 307 | ]
 308 | 
 309 | [[package]]
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 319 | ]
 320 | 
 321 | [[package]]
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 330 |  "once_cell",
 331 |  "rustix",
 332 |  "winx",
 333 | ]
 334 | 
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 340 | dependencies = [
 341 |  "serde",
 342 | ]
 343 | 
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 349 | dependencies = [
 350 |  "camino",
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 352 |  "semver",
 353 |  "serde",
 354 |  "serde_json",
 355 |  "thiserror",
 356 | ]
 357 | 
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 361 | source = "registry+https://github.com/rust-lang/crates.io-index"
 362 | checksum = "57b6a275aa2903740dc87da01c62040406b8812552e97129a63ea8850a17c6e6"
 363 | dependencies = [
 364 |  "jobserver",
 365 |  "libc",
 366 |  "shlex",
 367 | ]
 368 | 
 369 | [[package]]
 370 | name = "cfg-if"
 371 | version = "1.0.0"
 372 | source = "registry+https://github.com/rust-lang/crates.io-index"
 373 | checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 374 | 
 375 | [[package]]
 376 | name = "clap"
 377 | version = "4.5.16"
 378 | source = "registry+https://github.com/rust-lang/crates.io-index"
 379 | checksum = "ed6719fffa43d0d87e5fd8caeab59be1554fb028cd30edc88fc4369b17971019"
 380 | dependencies = [
 381 |  "clap_builder",
 382 |  "clap_derive",
 383 | ]
 384 | 
 385 | [[package]]
 386 | name = "clap_builder"
 387 | version = "4.5.15"
 388 | source = "registry+https://github.com/rust-lang/crates.io-index"
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 390 | dependencies = [
 391 |  "anstream",
 392 |  "anstyle",
 393 |  "clap_lex",
 394 |  "strsim",
 395 | ]
 396 | 
 397 | [[package]]
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 399 | version = "4.5.13"
 400 | source = "registry+https://github.com/rust-lang/crates.io-index"
 401 | checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0"
 402 | dependencies = [
 403 |  "heck 0.5.0",
 404 |  "proc-macro2",
 405 |  "quote",
 406 |  "syn 2.0.77",
 407 | ]
 408 | 
 409 | [[package]]
 410 | name = "clap_lex"
 411 | version = "0.7.2"
 412 | source = "registry+https://github.com/rust-lang/crates.io-index"
 413 | checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 414 | 
 415 | [[package]]
 416 | name = "cobs"
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3051 | checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
3052 | 
3053 | [[package]]
3054 | name = "windows_x86_64_msvc"
3055 | version = "0.52.6"
3056 | source = "registry+https://github.com/rust-lang/crates.io-index"
3057 | checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
3058 | 
3059 | [[package]]
3060 | name = "winnow"
3061 | version = "0.6.18"
3062 | source = "registry+https://github.com/rust-lang/crates.io-index"
3063 | checksum = "68a9bda4691f099d435ad181000724da8e5899daa10713c2d432552b9ccd3a6f"
3064 | dependencies = [
3065 |  "memchr",
3066 | ]
3067 | 
3068 | [[package]]
3069 | name = "winx"
3070 | version = "0.36.3"
3071 | source = "registry+https://github.com/rust-lang/crates.io-index"
3072 | checksum = "f9643b83820c0cd246ecabe5fa454dd04ba4fa67996369466d0747472d337346"
3073 | dependencies = [
3074 |  "bitflags",
3075 |  "windows-sys 0.52.0",
3076 | ]
3077 | 
3078 | [[package]]
3079 | name = "wit-parser"
3080 | version = "0.215.0"
3081 | source = "registry+https://github.com/rust-lang/crates.io-index"
3082 | checksum = "935a97eaffd57c3b413aa510f8f0b550a4a9fe7d59e79cd8b89a83dcb860321f"
3083 | dependencies = [
3084 |  "anyhow",
3085 |  "id-arena",
3086 |  "indexmap 2.5.0",
3087 |  "log",
3088 |  "semver",
3089 |  "serde",
3090 |  "serde_derive",
3091 |  "serde_json",
3092 |  "unicode-xid",
3093 |  "wasmparser 0.215.0",
3094 | ]
3095 | 
3096 | [[package]]
3097 | name = "witx"
3098 | version = "0.9.1"
3099 | source = "registry+https://github.com/rust-lang/crates.io-index"
3100 | checksum = "e366f27a5cabcddb2706a78296a40b8fcc451e1a6aba2fc1d94b4a01bdaaef4b"
3101 | dependencies = [
3102 |  "anyhow",
3103 |  "log",
3104 |  "thiserror",
3105 |  "wast 35.0.2",
3106 | ]
3107 | 
3108 | [[package]]
3109 | name = "zerocopy"
3110 | version = "0.7.35"
3111 | source = "registry+https://github.com/rust-lang/crates.io-index"
3112 | checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
3113 | dependencies = [
3114 |  "byteorder",
3115 |  "zerocopy-derive",
3116 | ]
3117 | 
3118 | [[package]]
3119 | name = "zerocopy-derive"
3120 | version = "0.7.35"
3121 | source = "registry+https://github.com/rust-lang/crates.io-index"
3122 | checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
3123 | dependencies = [
3124 |  "proc-macro2",
3125 |  "quote",
3126 |  "syn 2.0.77",
3127 | ]
3128 | 
3129 | [[package]]
3130 | name = "zstd"
3131 | version = "0.13.2"
3132 | source = "registry+https://github.com/rust-lang/crates.io-index"
3133 | checksum = "fcf2b778a664581e31e389454a7072dab1647606d44f7feea22cd5abb9c9f3f9"
3134 | dependencies = [
3135 |  "zstd-safe",
3136 | ]
3137 | 
3138 | [[package]]
3139 | name = "zstd-safe"
3140 | version = "7.2.1"
3141 | source = "registry+https://github.com/rust-lang/crates.io-index"
3142 | checksum = "54a3ab4db68cea366acc5c897c7b4d4d1b8994a9cd6e6f841f8964566a419059"
3143 | dependencies = [
3144 |  "zstd-sys",
3145 | ]
3146 | 
3147 | [[package]]
3148 | name = "zstd-sys"
3149 | version = "2.0.13+zstd.1.5.6"
3150 | source = "registry+https://github.com/rust-lang/crates.io-index"
3151 | checksum = "38ff0f21cfee8f97d94cef41359e0c89aa6113028ab0291aa8ca0038995a95aa"
3152 | dependencies = [
3153 |  "cc",
3154 |  "pkg-config",
3155 | ]
3156 | 


--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [workspace]
 2 | resolver = "2"
 3 | 
 4 | exclude = [
 5 |     "examples",
 6 | ]
 7 | 
 8 | members = [
 9 |     "stateroom",
10 |     "stateroom-*",
11 | ]
12 | 


--------------------------------------------------------------------------------
/Dockerfile:
--------------------------------------------------------------------------------
 1 | FROM rust:1.80-slim as build
 2 | 
 3 | WORKDIR /work
 4 | COPY . .
 5 | RUN cargo build -p stateroom-cli --release
 6 | 
 7 | FROM debian:bookworm-slim
 8 | 
 9 | COPY --from=build /work/target/release/stateroom /stateroom
10 | ENTRYPOINT [ "/stateroom" ]
11 | CMD ["serve", "/dist"]
12 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2021 Paul Butler
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # Stateroom
  2 | 
  3 | [![crates.io](https://img.shields.io/crates/v/stateroom.svg)](https://crates.io/crates/stateroom)
  4 | [![docs.rs](https://img.shields.io/badge/docs-release-brightgreen)](https://docs.rs/stateroom/0.1.0/stateroom/)
  5 | [![wokflow state](https://github.com/drifting-in-space/stateroom/actions/workflows/test.yml/badge.svg)](https://github.com/drifting-in-space/stateroom/actions/workflows/test.yml)
  6 | 
  7 | Stateroom is a minimalist framework for building lightweight, single-threaded services that send and
  8 | receive messages through [WebSockets](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API).
  9 | 
 10 | Services can either be native Rust code that runs in the server process, or be compiled into
 11 | [WebAssembly](https://webassembly.org/) modules and loaded dynamically.
 12 | 
 13 | ## Usage
 14 | 
 15 | To create a Stateroom service, implement the `SimpleStateroomService` trait. There's only one function that you *must* implement, the constructor `new`.
 16 | 
 17 | Let's implement a simple shared counter. Any connected client will be able to increment or decrement it by sending 
 18 | `increment` or `decrement` messages (other messages will be ignored). Whenever the value is changed, we'll broadcast it 
 19 | to every connected client.
 20 | 
 21 | ```rust
 22 | use stateroom_wasm::*;
 23 | 
 24 | #[stateroom_wasm]
 25 | #[derive(Default)]
 26 | struct EchoServer;
 27 | 
 28 | impl StateroomService for EchoServer {
 29 |     fn connect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
 30 |         ctx.send_message(client_id, format!("User {:?} connected.", client_id));
 31 |     }
 32 | 
 33 |     fn message(&mut self, client_id: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
 34 |         let Some(message) = message.text() else {
 35 |             return;
 36 |         };
 37 | 
 38 |         ctx.send_message(
 39 |             MessageRecipient::Broadcast,
 40 |             format!("User {:?} sent '{}'", client_id, message),
 41 |         );
 42 |     }
 43 | 
 44 |     fn disconnect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
 45 |         ctx.send_message(
 46 |             MessageRecipient::Broadcast,
 47 |             format!("User {:?} left.", client_id),
 48 |         );
 49 |     }
 50 | }
 51 | ```
 52 | 
 53 | To serve this service, we will compile it into a WebAssembly module. We import the `#[stateroom_wasm]`
 54 | annotation macro and apply it to the existing `SharedCounter` declaration.
 55 | 
 56 | ```rust
 57 | use stateroom_wasm::*;
 58 | 
 59 | #[stateroom_wasm]
 60 | #[derive(Default)]
 61 | struct SharedCounter(i32);
 62 | 
 63 | impl StateroomService for SharedCounter {}
 64 | ```
 65 | 
 66 | Then, install the `stateroom` command-line tool and the `wasm32-wasi` target, and run 
 67 | `stateroom dev`:
 68 | 
 69 | ```bash
 70 | $ cargo install stateroom-cli
 71 | $ rustup target add wasm32-wasi
 72 | $ stateroom dev
 73 | ```
 74 | 
 75 | `stateroom dev` will build your app and serve it on port `:8080`. Then, open
 76 | `http://localhost:8080/status` in your browser -- if all went well, you should see the
 77 | status message `ok`. Open up developer tools in your browser and type:
 78 | 
 79 | ```javascript
 80 | let ws = new WebSocket('ws://localhost:8080/ws');
 81 | ws.onmessage = (c) => console.log(c.data);
 82 | ```
 83 | 
 84 | This connects to your service, creating a new room with the id `1` if one doesn't exist
 85 | (under default server settings, any string is a vaild room ID and connecting to a non-existant
 86 | room will create it).
 87 | 
 88 | Now, you can increment the counter by sending the `increment` message using the `ws` handle:
 89 | 
 90 | ```javascript
 91 | ws.send('increment')
 92 | ```
 93 | 
 94 | If everything is set up correctly, the result will be printed out:
 95 | 
 96 | ```text
 97 | new value: 1
 98 | ```
 99 | 
100 | If multiple clients are connected, each one will receive this message. Just like that, we have a mechanism for sharing some (very basic) application state between clients.
101 | 
102 | ## Modules
103 | 
104 | Stateroom has a modular architecture. If all you want to do is generate a Stateroom service to
105 | be served with an existing Stateroom WebAssembly server, the main crates you will interact with
106 | will probably be [`stateroom-cli`](/stateroom-cli), which provides a command-line tool, and
107 | [`stateroom-wasm`](/stateroom-wasm), the main Cargo dependency for building services.
108 | 
109 | - [`stateroom`](https://docs.rs/stateroom/) is the core, minimal implementation of the service interface.
110 | - [`stateroom-cli`](https://docs.rs/stateroom-cli/) is a command-line interface for interacting with WebAssembly-compiled Stateroom services.
111 | - [`stateroom-server`](https://docs.rs/stateroom-server/) provides an [Axum](https://github.com/tokio-rs/axum)-based WebSocket server that runs a Stateroom service.
112 | - [`stateroom-wasm`](https://docs.rs/stateroom-wasm/) provides a macro for generating WebAssembly modules from Stateroom services.
113 | - [`stateroom-wasm-host`](https://docs.rs/stateroom-wasm-host/) provides a way to import Stateroom services from WebAssembly modules.
114 | 
115 | ## See Also
116 | 
117 | [Aper](https://github.com/aper-dev/aper) is a state synchronization library which
118 | works with Stateroom. 
119 | 


--------------------------------------------------------------------------------
/examples/.gitignore:
--------------------------------------------------------------------------------
1 | out.wasm
2 | out.wat
3 | 


--------------------------------------------------------------------------------
/examples/binary-echo/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/binary-echo/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "binary-echo"
  7 | version = "0.1.0"
  8 | dependencies = [
  9 |  "stateroom-wasm",
 10 | ]
 11 | 
 12 | [[package]]
 13 | name = "bincode"
 14 | version = "1.3.3"
 15 | source = "registry+https://github.com/rust-lang/crates.io-index"
 16 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 17 | dependencies = [
 18 |  "serde",
 19 | ]
 20 | 
 21 | [[package]]
 22 | name = "proc-macro2"
 23 | version = "1.0.81"
 24 | source = "registry+https://github.com/rust-lang/crates.io-index"
 25 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 26 | dependencies = [
 27 |  "unicode-ident",
 28 | ]
 29 | 
 30 | [[package]]
 31 | name = "quote"
 32 | version = "1.0.36"
 33 | source = "registry+https://github.com/rust-lang/crates.io-index"
 34 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 35 | dependencies = [
 36 |  "proc-macro2",
 37 | ]
 38 | 
 39 | [[package]]
 40 | name = "serde"
 41 | version = "1.0.200"
 42 | source = "registry+https://github.com/rust-lang/crates.io-index"
 43 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 44 | dependencies = [
 45 |  "serde_derive",
 46 | ]
 47 | 
 48 | [[package]]
 49 | name = "serde_derive"
 50 | version = "1.0.200"
 51 | source = "registry+https://github.com/rust-lang/crates.io-index"
 52 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 53 | dependencies = [
 54 |  "proc-macro2",
 55 |  "quote",
 56 |  "syn",
 57 | ]
 58 | 
 59 | [[package]]
 60 | name = "stateroom"
 61 | version = "0.2.8"
 62 | dependencies = [
 63 |  "serde",
 64 | ]
 65 | 
 66 | [[package]]
 67 | name = "stateroom-wasm"
 68 | version = "0.2.9"
 69 | dependencies = [
 70 |  "bincode",
 71 |  "stateroom",
 72 |  "stateroom-wasm-macro",
 73 | ]
 74 | 
 75 | [[package]]
 76 | name = "stateroom-wasm-macro"
 77 | version = "0.2.9"
 78 | dependencies = [
 79 |  "proc-macro2",
 80 |  "quote",
 81 |  "syn",
 82 | ]
 83 | 
 84 | [[package]]
 85 | name = "syn"
 86 | version = "2.0.60"
 87 | source = "registry+https://github.com/rust-lang/crates.io-index"
 88 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 89 | dependencies = [
 90 |  "proc-macro2",
 91 |  "quote",
 92 |  "unicode-ident",
 93 | ]
 94 | 
 95 | [[package]]
 96 | name = "unicode-ident"
 97 | version = "1.0.12"
 98 | source = "registry+https://github.com/rust-lang/crates.io-index"
 99 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
100 | 


--------------------------------------------------------------------------------
/examples/binary-echo/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "binary-echo"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | stateroom-wasm = {path="../../stateroom-wasm"}
12 | 


--------------------------------------------------------------------------------
/examples/binary-echo/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom_wasm::*;
 2 | 
 3 | #[stateroom_wasm]
 4 | #[derive(Default)]
 5 | struct BinaryEcho;
 6 | 
 7 | impl StateroomService for BinaryEcho {
 8 |     fn message(&mut self, _: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
 9 |         if let Some(message) = message.text() {
10 |             ctx.send_message(MessageRecipient::Broadcast, message);
11 |         }
12 |     }
13 | }
14 | 


--------------------------------------------------------------------------------
/examples/clock/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/clock/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "bincode"
  7 | version = "1.3.3"
  8 | source = "registry+https://github.com/rust-lang/crates.io-index"
  9 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 10 | dependencies = [
 11 |  "serde",
 12 | ]
 13 | 
 14 | [[package]]
 15 | name = "clock"
 16 | version = "0.1.0"
 17 | dependencies = [
 18 |  "stateroom-wasm",
 19 | ]
 20 | 
 21 | [[package]]
 22 | name = "proc-macro2"
 23 | version = "1.0.81"
 24 | source = "registry+https://github.com/rust-lang/crates.io-index"
 25 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 26 | dependencies = [
 27 |  "unicode-ident",
 28 | ]
 29 | 
 30 | [[package]]
 31 | name = "quote"
 32 | version = "1.0.36"
 33 | source = "registry+https://github.com/rust-lang/crates.io-index"
 34 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 35 | dependencies = [
 36 |  "proc-macro2",
 37 | ]
 38 | 
 39 | [[package]]
 40 | name = "serde"
 41 | version = "1.0.200"
 42 | source = "registry+https://github.com/rust-lang/crates.io-index"
 43 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 44 | dependencies = [
 45 |  "serde_derive",
 46 | ]
 47 | 
 48 | [[package]]
 49 | name = "serde_derive"
 50 | version = "1.0.200"
 51 | source = "registry+https://github.com/rust-lang/crates.io-index"
 52 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 53 | dependencies = [
 54 |  "proc-macro2",
 55 |  "quote",
 56 |  "syn",
 57 | ]
 58 | 
 59 | [[package]]
 60 | name = "stateroom"
 61 | version = "0.2.8"
 62 | dependencies = [
 63 |  "serde",
 64 | ]
 65 | 
 66 | [[package]]
 67 | name = "stateroom-wasm"
 68 | version = "0.2.9"
 69 | dependencies = [
 70 |  "bincode",
 71 |  "stateroom",
 72 |  "stateroom-wasm-macro",
 73 | ]
 74 | 
 75 | [[package]]
 76 | name = "stateroom-wasm-macro"
 77 | version = "0.2.9"
 78 | dependencies = [
 79 |  "proc-macro2",
 80 |  "quote",
 81 |  "syn",
 82 | ]
 83 | 
 84 | [[package]]
 85 | name = "syn"
 86 | version = "2.0.60"
 87 | source = "registry+https://github.com/rust-lang/crates.io-index"
 88 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 89 | dependencies = [
 90 |  "proc-macro2",
 91 |  "quote",
 92 |  "unicode-ident",
 93 | ]
 94 | 
 95 | [[package]]
 96 | name = "unicode-ident"
 97 | version = "1.0.12"
 98 | source = "registry+https://github.com/rust-lang/crates.io-index"
 99 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
100 | 


--------------------------------------------------------------------------------
/examples/clock/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "clock"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | stateroom-wasm = {path="../../stateroom-wasm"}
12 | 


--------------------------------------------------------------------------------
/examples/clock/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom_wasm::*;
 2 | 
 3 | #[stateroom_wasm]
 4 | #[derive(Default)]
 5 | struct ClockServer(u32);
 6 | 
 7 | impl StateroomService for ClockServer {
 8 |     fn init(&mut self, ctx: &impl StateroomContext) {
 9 |         ctx.set_timer(4000);
10 |     }
11 | 
12 |     fn timer(&mut self, ctx: &impl StateroomContext) {
13 |         ctx.send_message(MessageRecipient::Broadcast, format!("Timer @ {}", self.0));
14 |         self.0 += 1;
15 |         ctx.set_timer(4000);
16 |     }
17 | }
18 | 


--------------------------------------------------------------------------------
/examples/counter-service/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/counter-service/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "bincode"
  7 | version = "1.3.3"
  8 | source = "registry+https://github.com/rust-lang/crates.io-index"
  9 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 10 | dependencies = [
 11 |  "serde",
 12 | ]
 13 | 
 14 | [[package]]
 15 | name = "counter"
 16 | version = "0.1.0"
 17 | dependencies = [
 18 |  "stateroom-wasm",
 19 | ]
 20 | 
 21 | [[package]]
 22 | name = "proc-macro2"
 23 | version = "1.0.81"
 24 | source = "registry+https://github.com/rust-lang/crates.io-index"
 25 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 26 | dependencies = [
 27 |  "unicode-ident",
 28 | ]
 29 | 
 30 | [[package]]
 31 | name = "quote"
 32 | version = "1.0.36"
 33 | source = "registry+https://github.com/rust-lang/crates.io-index"
 34 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 35 | dependencies = [
 36 |  "proc-macro2",
 37 | ]
 38 | 
 39 | [[package]]
 40 | name = "serde"
 41 | version = "1.0.200"
 42 | source = "registry+https://github.com/rust-lang/crates.io-index"
 43 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 44 | dependencies = [
 45 |  "serde_derive",
 46 | ]
 47 | 
 48 | [[package]]
 49 | name = "serde_derive"
 50 | version = "1.0.200"
 51 | source = "registry+https://github.com/rust-lang/crates.io-index"
 52 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 53 | dependencies = [
 54 |  "proc-macro2",
 55 |  "quote",
 56 |  "syn",
 57 | ]
 58 | 
 59 | [[package]]
 60 | name = "stateroom"
 61 | version = "0.2.8"
 62 | dependencies = [
 63 |  "serde",
 64 | ]
 65 | 
 66 | [[package]]
 67 | name = "stateroom-wasm"
 68 | version = "0.2.9"
 69 | dependencies = [
 70 |  "bincode",
 71 |  "stateroom",
 72 |  "stateroom-wasm-macro",
 73 | ]
 74 | 
 75 | [[package]]
 76 | name = "stateroom-wasm-macro"
 77 | version = "0.2.9"
 78 | dependencies = [
 79 |  "proc-macro2",
 80 |  "quote",
 81 |  "syn",
 82 | ]
 83 | 
 84 | [[package]]
 85 | name = "syn"
 86 | version = "2.0.60"
 87 | source = "registry+https://github.com/rust-lang/crates.io-index"
 88 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 89 | dependencies = [
 90 |  "proc-macro2",
 91 |  "quote",
 92 |  "unicode-ident",
 93 | ]
 94 | 
 95 | [[package]]
 96 | name = "unicode-ident"
 97 | version = "1.0.12"
 98 | source = "registry+https://github.com/rust-lang/crates.io-index"
 99 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
100 | 


--------------------------------------------------------------------------------
/examples/counter-service/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "counter"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | stateroom-wasm = {path="../../stateroom-wasm"}
12 | 


--------------------------------------------------------------------------------
/examples/counter-service/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom_wasm::*;
 2 | 
 3 | #[stateroom_wasm]
 4 | #[derive(Default)]
 5 | struct SharedCounterServer(i32);
 6 | 
 7 | impl StateroomService for SharedCounterServer {
 8 |     fn message(&mut self, _: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
 9 |         let Some(message) = message.text() else {
10 |             return;
11 |         };
12 | 
13 |         match &message[..] {
14 |             "increment" => self.0 += 1,
15 |             "decrement" => self.0 -= 1,
16 |             _ => (),
17 |         }
18 | 
19 |         ctx.send_message(
20 |             MessageRecipient::Broadcast,
21 |             format!("new value: {}", self.0),
22 |         );
23 |     }
24 | }
25 | 


--------------------------------------------------------------------------------
/examples/cpu-hog/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/cpu-hog/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "bincode"
  7 | version = "1.3.3"
  8 | source = "registry+https://github.com/rust-lang/crates.io-index"
  9 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 10 | dependencies = [
 11 |  "serde",
 12 | ]
 13 | 
 14 | [[package]]
 15 | name = "cpu-hog"
 16 | version = "0.1.0"
 17 | dependencies = [
 18 |  "stateroom-wasm",
 19 |  "wasi",
 20 | ]
 21 | 
 22 | [[package]]
 23 | name = "proc-macro2"
 24 | version = "1.0.81"
 25 | source = "registry+https://github.com/rust-lang/crates.io-index"
 26 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 27 | dependencies = [
 28 |  "unicode-ident",
 29 | ]
 30 | 
 31 | [[package]]
 32 | name = "quote"
 33 | version = "1.0.36"
 34 | source = "registry+https://github.com/rust-lang/crates.io-index"
 35 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 36 | dependencies = [
 37 |  "proc-macro2",
 38 | ]
 39 | 
 40 | [[package]]
 41 | name = "serde"
 42 | version = "1.0.200"
 43 | source = "registry+https://github.com/rust-lang/crates.io-index"
 44 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 45 | dependencies = [
 46 |  "serde_derive",
 47 | ]
 48 | 
 49 | [[package]]
 50 | name = "serde_derive"
 51 | version = "1.0.200"
 52 | source = "registry+https://github.com/rust-lang/crates.io-index"
 53 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 54 | dependencies = [
 55 |  "proc-macro2",
 56 |  "quote",
 57 |  "syn",
 58 | ]
 59 | 
 60 | [[package]]
 61 | name = "stateroom"
 62 | version = "0.2.8"
 63 | dependencies = [
 64 |  "serde",
 65 | ]
 66 | 
 67 | [[package]]
 68 | name = "stateroom-wasm"
 69 | version = "0.2.9"
 70 | dependencies = [
 71 |  "bincode",
 72 |  "stateroom",
 73 |  "stateroom-wasm-macro",
 74 | ]
 75 | 
 76 | [[package]]
 77 | name = "stateroom-wasm-macro"
 78 | version = "0.2.9"
 79 | dependencies = [
 80 |  "proc-macro2",
 81 |  "quote",
 82 |  "syn",
 83 | ]
 84 | 
 85 | [[package]]
 86 | name = "syn"
 87 | version = "2.0.60"
 88 | source = "registry+https://github.com/rust-lang/crates.io-index"
 89 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 90 | dependencies = [
 91 |  "proc-macro2",
 92 |  "quote",
 93 |  "unicode-ident",
 94 | ]
 95 | 
 96 | [[package]]
 97 | name = "unicode-ident"
 98 | version = "1.0.12"
 99 | source = "registry+https://github.com/rust-lang/crates.io-index"
100 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
101 | 
102 | [[package]]
103 | name = "wasi"
104 | version = "0.10.2+wasi-snapshot-preview1"
105 | source = "registry+https://github.com/rust-lang/crates.io-index"
106 | checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
107 | 


--------------------------------------------------------------------------------
/examples/cpu-hog/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "cpu-hog"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | stateroom-wasm = {path="../../stateroom-wasm"}
12 | wasi = "0.10.2"
13 | 


--------------------------------------------------------------------------------
/examples/cpu-hog/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom_wasm::*;
 2 | 
 3 | // Seconds per nanosecond. (`wasi::clock_time_get` uses nanos.)
 4 | const SECONDS: u64 = 1_000_000_000;
 5 | 
 6 | #[stateroom_wasm]
 7 | #[derive(Default)]
 8 | struct CpuHog;
 9 | 
10 | fn get_time() -> u64 {
11 |     unsafe { wasi::clock_time_get(wasi::CLOCKID_REALTIME, 0).unwrap() }
12 | }
13 | 
14 | impl StateroomService for CpuHog {
15 |     fn connect(&mut self, _: ClientId, ctx: &impl StateroomContext) {
16 |         ctx.send_message(MessageRecipient::Broadcast, "Connected.");
17 | 
18 |         let init_time = get_time();
19 |         loop {
20 |             let cur_time = get_time();
21 |             if init_time + 10 * SECONDS < cur_time {
22 |                 break;
23 |             }
24 |         }
25 | 
26 |         ctx.send_message(MessageRecipient::Broadcast, "Finished.");
27 |     }
28 | }
29 | 


--------------------------------------------------------------------------------
/examples/echo-server/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/echo-server/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "bincode"
  7 | version = "1.3.3"
  8 | source = "registry+https://github.com/rust-lang/crates.io-index"
  9 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 10 | dependencies = [
 11 |  "serde",
 12 | ]
 13 | 
 14 | [[package]]
 15 | name = "echo-server"
 16 | version = "0.1.0"
 17 | dependencies = [
 18 |  "stateroom-wasm",
 19 | ]
 20 | 
 21 | [[package]]
 22 | name = "proc-macro2"
 23 | version = "1.0.81"
 24 | source = "registry+https://github.com/rust-lang/crates.io-index"
 25 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 26 | dependencies = [
 27 |  "unicode-ident",
 28 | ]
 29 | 
 30 | [[package]]
 31 | name = "quote"
 32 | version = "1.0.36"
 33 | source = "registry+https://github.com/rust-lang/crates.io-index"
 34 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 35 | dependencies = [
 36 |  "proc-macro2",
 37 | ]
 38 | 
 39 | [[package]]
 40 | name = "serde"
 41 | version = "1.0.200"
 42 | source = "registry+https://github.com/rust-lang/crates.io-index"
 43 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 44 | dependencies = [
 45 |  "serde_derive",
 46 | ]
 47 | 
 48 | [[package]]
 49 | name = "serde_derive"
 50 | version = "1.0.200"
 51 | source = "registry+https://github.com/rust-lang/crates.io-index"
 52 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 53 | dependencies = [
 54 |  "proc-macro2",
 55 |  "quote",
 56 |  "syn",
 57 | ]
 58 | 
 59 | [[package]]
 60 | name = "stateroom"
 61 | version = "0.2.8"
 62 | dependencies = [
 63 |  "serde",
 64 | ]
 65 | 
 66 | [[package]]
 67 | name = "stateroom-wasm"
 68 | version = "0.2.9"
 69 | dependencies = [
 70 |  "bincode",
 71 |  "stateroom",
 72 |  "stateroom-wasm-macro",
 73 | ]
 74 | 
 75 | [[package]]
 76 | name = "stateroom-wasm-macro"
 77 | version = "0.2.9"
 78 | dependencies = [
 79 |  "proc-macro2",
 80 |  "quote",
 81 |  "syn",
 82 | ]
 83 | 
 84 | [[package]]
 85 | name = "syn"
 86 | version = "2.0.60"
 87 | source = "registry+https://github.com/rust-lang/crates.io-index"
 88 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 89 | dependencies = [
 90 |  "proc-macro2",
 91 |  "quote",
 92 |  "unicode-ident",
 93 | ]
 94 | 
 95 | [[package]]
 96 | name = "unicode-ident"
 97 | version = "1.0.12"
 98 | source = "registry+https://github.com/rust-lang/crates.io-index"
 99 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
100 | 


--------------------------------------------------------------------------------
/examples/echo-server/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "echo-server"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | stateroom-wasm = {path="../../stateroom-wasm"}
12 | 


--------------------------------------------------------------------------------
/examples/echo-server/dist/server.wasm:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/jamsocket/stateroom/3f002031bfa05350c1de63df392a9797d18658e2/examples/echo-server/dist/server.wasm


--------------------------------------------------------------------------------
/examples/echo-server/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom_wasm::*;
 2 | 
 3 | #[stateroom_wasm]
 4 | #[derive(Default)]
 5 | struct EchoServer;
 6 | 
 7 | impl StateroomService for EchoServer {
 8 |     fn connect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
 9 |         ctx.send_message(client_id, format!("User {:?} connected.", client_id));
10 |     }
11 | 
12 |     fn message(&mut self, client_id: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
13 |         let Some(message) = message.text() else {
14 |             return;
15 |         };
16 | 
17 |         ctx.send_message(
18 |             MessageRecipient::Broadcast,
19 |             format!("User {:?} sent '{}'", client_id, message),
20 |         );
21 |     }
22 | 
23 |     fn disconnect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
24 |         ctx.send_message(
25 |             MessageRecipient::Broadcast,
26 |             format!("User {:?} left.", client_id),
27 |         );
28 |     }
29 | }
30 | 


--------------------------------------------------------------------------------
/examples/randomness/.cargo/config:
--------------------------------------------------------------------------------
1 | [build]
2 | target = "wasm32-wasi"
3 | 


--------------------------------------------------------------------------------
/examples/randomness/Cargo.lock:
--------------------------------------------------------------------------------
  1 | # This file is automatically @generated by Cargo.
  2 | # It is not intended for manual editing.
  3 | version = 3
  4 | 
  5 | [[package]]
  6 | name = "bincode"
  7 | version = "1.3.3"
  8 | source = "registry+https://github.com/rust-lang/crates.io-index"
  9 | checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 10 | dependencies = [
 11 |  "serde",
 12 | ]
 13 | 
 14 | [[package]]
 15 | name = "bytemuck"
 16 | version = "1.15.0"
 17 | source = "registry+https://github.com/rust-lang/crates.io-index"
 18 | checksum = "5d6d68c57235a3a081186990eca2867354726650f42f7516ca50c28d6281fd15"
 19 | 
 20 | [[package]]
 21 | name = "proc-macro2"
 22 | version = "1.0.81"
 23 | source = "registry+https://github.com/rust-lang/crates.io-index"
 24 | checksum = "3d1597b0c024618f09a9c3b8655b7e430397a36d23fdafec26d6965e9eec3eba"
 25 | dependencies = [
 26 |  "unicode-ident",
 27 | ]
 28 | 
 29 | [[package]]
 30 | name = "quote"
 31 | version = "1.0.36"
 32 | source = "registry+https://github.com/rust-lang/crates.io-index"
 33 | checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
 34 | dependencies = [
 35 |  "proc-macro2",
 36 | ]
 37 | 
 38 | [[package]]
 39 | name = "randomness"
 40 | version = "0.1.0"
 41 | dependencies = [
 42 |  "bytemuck",
 43 |  "stateroom-wasm",
 44 |  "wasi",
 45 | ]
 46 | 
 47 | [[package]]
 48 | name = "serde"
 49 | version = "1.0.200"
 50 | source = "registry+https://github.com/rust-lang/crates.io-index"
 51 | checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
 52 | dependencies = [
 53 |  "serde_derive",
 54 | ]
 55 | 
 56 | [[package]]
 57 | name = "serde_derive"
 58 | version = "1.0.200"
 59 | source = "registry+https://github.com/rust-lang/crates.io-index"
 60 | checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
 61 | dependencies = [
 62 |  "proc-macro2",
 63 |  "quote",
 64 |  "syn",
 65 | ]
 66 | 
 67 | [[package]]
 68 | name = "stateroom"
 69 | version = "0.2.8"
 70 | dependencies = [
 71 |  "serde",
 72 | ]
 73 | 
 74 | [[package]]
 75 | name = "stateroom-wasm"
 76 | version = "0.2.9"
 77 | dependencies = [
 78 |  "bincode",
 79 |  "stateroom",
 80 |  "stateroom-wasm-macro",
 81 | ]
 82 | 
 83 | [[package]]
 84 | name = "stateroom-wasm-macro"
 85 | version = "0.2.9"
 86 | dependencies = [
 87 |  "proc-macro2",
 88 |  "quote",
 89 |  "syn",
 90 | ]
 91 | 
 92 | [[package]]
 93 | name = "syn"
 94 | version = "2.0.60"
 95 | source = "registry+https://github.com/rust-lang/crates.io-index"
 96 | checksum = "909518bc7b1c9b779f1bbf07f2929d35af9f0f37e47c6e9ef7f9dddc1e1821f3"
 97 | dependencies = [
 98 |  "proc-macro2",
 99 |  "quote",
100 |  "unicode-ident",
101 | ]
102 | 
103 | [[package]]
104 | name = "unicode-ident"
105 | version = "1.0.12"
106 | source = "registry+https://github.com/rust-lang/crates.io-index"
107 | checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
108 | 
109 | [[package]]
110 | name = "wasi"
111 | version = "0.10.2+wasi-snapshot-preview1"
112 | source = "registry+https://github.com/rust-lang/crates.io-index"
113 | checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
114 | 


--------------------------------------------------------------------------------
/examples/randomness/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "randomness"
 3 | version = "0.1.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | 
 7 | [lib]
 8 | crate-type = ["cdylib", "rlib"]
 9 | 
10 | [dependencies]
11 | bytemuck = "1.7.0"
12 | stateroom-wasm = {path="../../stateroom-wasm"}
13 | wasi = "0.10.2"
14 | 


--------------------------------------------------------------------------------
/examples/randomness/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use bytemuck::cast;
 2 | use stateroom_wasm::*;
 3 | 
 4 | #[stateroom_wasm]
 5 | #[derive(Default)]
 6 | struct RandomServer;
 7 | 
 8 | impl StateroomService for RandomServer {
 9 |     fn connect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
10 |         let mut buf: [u8; 4] = [0, 0, 0, 0];
11 |         unsafe {
12 |             wasi::random_get(&mut buf[0] as *mut u8, 4).unwrap();
13 |         }
14 | 
15 |         let num: [u32; 1] = cast(buf);
16 | 
17 |         ctx.send_message(
18 |             client_id,
19 |             format!("User {:?} connected. Random number: {}", client_id, num[0]),
20 |         );
21 |     }
22 | 
23 |     fn message(&mut self, client_id: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
24 |         let Some(message) = message.text() else {
25 |             return;
26 |         };
27 | 
28 |         ctx.send_message(
29 |             MessageRecipient::Broadcast,
30 |             format!("User {:?} sent '{}'", client_id, message),
31 |         );
32 |     }
33 | 
34 |     fn disconnect(&mut self, client_id: ClientId, ctx: &impl StateroomContext) {
35 |         ctx.send_message(
36 |             MessageRecipient::Broadcast,
37 |             format!("User {:?} left.", client_id),
38 |         );
39 |     }
40 | }
41 | 


--------------------------------------------------------------------------------
/stateroom-cli/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom-cli"
 3 | version = "0.4.4"
 4 | edition = "2018"
 5 | readme = "README.md"
 6 | repository = "https://github.com/drifting-in-space/stateroom"
 7 | license = "MIT OR Apache-2.0"
 8 | keywords = ["websocket"]
 9 | description = "Command-line tool for developing Stateroom applications"
10 | 
11 | [dependencies]
12 | anyhow = "1.0.52"
13 | cargo_metadata = "0.18.1"
14 | clap = { version = "4.1.6", features = ["derive"] }
15 | fs_extra = "1.2.0"
16 | serde = { version = "1.0.127", features = ["derive"] }
17 | stateroom = { path="../stateroom", version="0.4.0" }
18 | stateroom-server = { path="../stateroom-server", version="0.4.0" }
19 | stateroom-wasm-host = { path="../stateroom-wasm-host", version="0.4.0" }
20 | toml = "0.8.12"
21 | tracing = "0.1.28"
22 | tracing-subscriber = { version = "0.3.5", features = ["env-filter"] }
23 | wasm-bindgen-cli-support = "0.2.83"
24 | 


--------------------------------------------------------------------------------
/stateroom-cli/README.md:
--------------------------------------------------------------------------------
 1 | # stateroom-cli
 2 | 
 3 | This module implements a command-line interface for building and serving Stateroom
 4 | services.
 5 | 
 6 | ## Installation
 7 | 
 8 | ```bash
 9 | cargo install stateroom-cli
10 | ```
11 | 
12 | ## Commands
13 | 
14 | *The `stateroom` command is new even relative to the other parts of Stateroom, so
15 | expect this list to grow over time and commands may be renamed or combined over time.*
16 | 
17 | ### `stateroom dev`
18 | 
19 | By default, the command `dev` will:
20 | - Build the current module as a `wasm32-wasi` target.
21 | - Locate the wasm output.
22 | - Run a local server that exposes it on port 8080.
23 | 
24 | It can also be configured using a `stateroom.toml` file to serve static files
25 | and build a client-side WebAssembly module. See [`cli_opts.rs`](src/cli_opts.rs)
26 | for 
27 | 
28 | ### `stateroom serve`
29 | 
30 | The command `serve [path/to/service.wasm]` will set up a server for an existing 
31 | WebAssembly file.
32 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/bin/stateroom.rs:
--------------------------------------------------------------------------------
 1 | //! # `stateroom-cli`: a command-line interface to Stateroom
 2 | 
 3 | use clap::Parser;
 4 | use stateroom_cli::cli_opts::{Opts, SubCommand};
 5 | use stateroom_cli::{build, dev, serve};
 6 | use tracing_subscriber::EnvFilter;
 7 | 
 8 | fn main() -> anyhow::Result<()> {
 9 |     let env_filter = EnvFilter::default()
10 |         .add_directive("stateroom_cli=info".parse()?)
11 |         .add_directive("stateroom_wasm_host=info".parse()?)
12 |         .add_directive("stateroom_server=info".parse()?);
13 | 
14 |     tracing_subscriber::fmt().with_env_filter(env_filter).init();
15 | 
16 |     let opts = Opts::parse();
17 | 
18 |     match opts.subcommand {
19 |         SubCommand::Serve(serve_opts) => serve(serve_opts),
20 |         SubCommand::Dev { port } => dev(port),
21 |         SubCommand::Build => build(),
22 |     }
23 | }
24 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/build_util.rs:
--------------------------------------------------------------------------------
  1 | use crate::config::StateroomConfig;
  2 | use anyhow::{anyhow, Result};
  3 | use cargo_metadata::Message;
  4 | use std::{
  5 |     fs::read_to_string,
  6 |     path::PathBuf,
  7 |     process::{Command, Stdio},
  8 | };
  9 | use wasm_bindgen_cli_support::Bindgen;
 10 | 
 11 | pub fn locate_config() -> anyhow::Result<StateroomConfig> {
 12 |     if let Ok(r) = read_to_string("stateroom.toml") {
 13 |         tracing::info!("Loading config from file (stateroom.toml)");
 14 |         toml::from_str(&r).map_err(|e| e.into())
 15 |     } else {
 16 |         tracing::info!("Didn't find a stateroom.toml file in current directory, using default");
 17 |         Ok(StateroomConfig::default())
 18 |     }
 19 | }
 20 | 
 21 | pub fn run_cargo_build_command(
 22 |     package: &Option<String>,
 23 |     target: &str,
 24 |     release: bool,
 25 | ) -> Result<PathBuf> {
 26 |     let mut build_command = Command::new("cargo");
 27 |     build_command.stdout(Stdio::piped());
 28 |     build_command.arg("build");
 29 |     build_command.args(["--message-format", "json-render-diagnostics"]);
 30 | 
 31 |     if let Some(package) = package {
 32 |         // If package is None, build the package we are in.
 33 |         build_command.args(["--package", package]);
 34 |     }
 35 |     build_command.args(["--target", target]);
 36 | 
 37 |     if release {
 38 |         build_command.arg("--release");
 39 |     }
 40 | 
 41 |     let mut build_command = build_command.spawn()?;
 42 |     let reader = std::io::BufReader::new(
 43 |         build_command
 44 |             .stdout
 45 |             .take()
 46 |             .ok_or_else(|| anyhow!("Could not read stdout stream."))?,
 47 |     );
 48 | 
 49 |     let mut found_wasm_modules = Vec::new();
 50 | 
 51 |     for message in cargo_metadata::Message::parse_stream(reader) {
 52 |         match message {
 53 |             // TODO: handle error when toolchain is not installed, and retry after
 54 |             // attempting to install toolchain.
 55 |             Ok(Message::CompilerArtifact(artifact)) => {
 56 |                 for filename in artifact.filenames {
 57 |                     if filename
 58 |                         .extension()
 59 |                         .map_or(false, |ext| ext.to_ascii_lowercase() == "wasm")
 60 |                     {
 61 |                         if filename.parent().map_or(false, |p| p.ends_with("deps")) {
 62 |                             continue;
 63 |                         }
 64 | 
 65 |                         found_wasm_modules.push(filename);
 66 |                     }
 67 |                 }
 68 |             }
 69 |             Ok(Message::BuildFinished(finished)) => {
 70 |                 if !finished.success {
 71 |                     return Err(anyhow!("Build error."));
 72 |                 }
 73 |             }
 74 |             Err(e) => return Err(anyhow!("Unknown error during build: {:?}.", e)),
 75 |             _ => (),
 76 |         }
 77 |     }
 78 | 
 79 |     build_command
 80 |         .wait()
 81 |         .map_err(|e| anyhow!("Encountered OS error running build subprocess: {:?}", e))?;
 82 | 
 83 |     let result = match found_wasm_modules.as_slice() {
 84 |         [] => return Err(anyhow!("No .wasm files emitted by build.")),
 85 |         [a] => a,
 86 |         files => {
 87 |             return Err(anyhow!(
 88 |                 "Multiple .wasm files emitted by build ({:?}).",
 89 |                 files
 90 |             ))
 91 |         }
 92 |     };
 93 | 
 94 |     Ok(result.into())
 95 | }
 96 | 
 97 | pub struct BuildResult {
 98 |     pub server_wasm: String,
 99 |     pub client_wasm: Option<String>,
100 | }
101 | 
102 | pub fn do_build(config: &StateroomConfig) -> Result<BuildResult> {
103 |     tracing::info!("Building service");
104 |     let server_wasm = run_cargo_build_command(&config.service.package, "wasm32-wasip1", true)?;
105 | 
106 |     let client_wasm = if let Some(client_config) = &config.client {
107 |         tracing::info!("Building client");
108 |         let client_wasm_path = run_cargo_build_command(
109 |             &Some(client_config.package.to_string()),
110 |             "wasm32-unknown-unknown",
111 |             true,
112 |         )
113 |         .expect("Error building client.");
114 | 
115 |         Bindgen::new()
116 |             .input_path(client_wasm_path)
117 |             .web(true)?
118 |             .emit_start(false)
119 |             .typescript(true)
120 |             .generate("client-pkg")?;
121 | 
122 |         // TODO: run wasm-opt
123 |         Some("client-pkg".to_string())
124 |     } else {
125 |         None
126 |     };
127 | 
128 |     Ok(BuildResult {
129 |         client_wasm,
130 |         server_wasm: server_wasm.to_str().unwrap().to_string(),
131 |     })
132 | }
133 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/cli_opts.rs:
--------------------------------------------------------------------------------
 1 | use clap::Parser;
 2 | 
 3 | #[derive(Parser)]
 4 | pub struct Opts {
 5 |     #[clap(subcommand)]
 6 |     pub subcommand: SubCommand,
 7 | }
 8 | 
 9 | #[derive(Parser)]
10 | pub enum SubCommand {
11 |     /// Run a dev server to host a given Stateroom module.
12 |     Serve(ServeCommand),
13 | 
14 |     Build,
15 |     Dev {
16 |         #[clap(default_value = "8080")]
17 |         port: u16,
18 |     },
19 | }
20 | 
21 | #[derive(Parser)]
22 | pub struct LoginCommand {
23 |     #[clap(short, long)]
24 |     pub token: Option<String>,
25 | 
26 |     #[clap(short, long)]
27 |     pub clear: bool,
28 | }
29 | 
30 | #[derive(Parser)]
31 | pub struct ServeCommand {
32 |     /// The module (.wasm file) to serve.
33 |     pub module: String,
34 | 
35 |     /// The port to serve on.
36 |     #[clap(short, long, default_value = "8080")]
37 |     pub port: u16,
38 | 
39 |     /// The time interval (in seconds) between WebSocket heartbeat pings.
40 |     #[clap(short = 'i', long, default_value = "30")]
41 |     pub heartbeat_interval: u64,
42 | 
43 |     /// The duration of time without hearing from a client before it is
44 |     /// assumed to be disconnected.
45 |     #[clap(short = 't', long, default_value = "120")]
46 |     pub heartbeat_timeout: u64,
47 | }
48 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/commands/build.rs:
--------------------------------------------------------------------------------
 1 | use crate::build_util::{do_build, locate_config};
 2 | use anyhow::Context;
 3 | use fs_extra::dir::CopyOptions;
 4 | use std::{
 5 |     fs::{copy, create_dir, remove_dir_all},
 6 |     path::Path,
 7 | };
 8 | 
 9 | const OUTPUT_DIR: &str = "dist";
10 | const STATIC_DIR: &str = "static";
11 | 
12 | pub fn build() -> anyhow::Result<()> {
13 |     let config = locate_config()?; // TODO: default to a configuration if file not found.
14 | 
15 |     let build_result = do_build(&config)?;
16 | 
17 |     if Path::new(OUTPUT_DIR).exists() {
18 |         remove_dir_all(OUTPUT_DIR).context("Couldn't delete dist directory.")?;
19 |     }
20 |     create_dir(OUTPUT_DIR).context("Couldn't create dist directory.")?;
21 | 
22 |     copy(
23 |         build_result.server_wasm,
24 |         Path::new(OUTPUT_DIR).join("server.wasm"),
25 |     )
26 |     .context("Couldn't copy server.wasm.")?;
27 | 
28 |     create_dir(Path::new(OUTPUT_DIR).join(STATIC_DIR))
29 |         .context("Couldn't create empty static directory.")?;
30 | 
31 |     if let Some(static_dir) = config.static_files {
32 |         fs_extra::dir::copy(
33 |             static_dir,
34 |             Path::new(OUTPUT_DIR).join(STATIC_DIR),
35 |             &CopyOptions {
36 |                 content_only: true,
37 |                 ..CopyOptions::default()
38 |             },
39 |         )
40 |         .context("Couldn't copy static items.")?;
41 |     }
42 | 
43 |     if let Some(client_wasm) = build_result.client_wasm {
44 |         fs_extra::dir::copy(
45 |             client_wasm,
46 |             Path::new(OUTPUT_DIR).join(STATIC_DIR).join("client"),
47 |             &CopyOptions {
48 |                 copy_inside: true,
49 |                 ..CopyOptions::default()
50 |             },
51 |         )
52 |         .context("Couldn't copy client wasm.")?;
53 |     }
54 | 
55 |     Ok(())
56 | }
57 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/commands/dev.rs:
--------------------------------------------------------------------------------
 1 | use crate::build_util::{do_build, locate_config};
 2 | use stateroom_server::Server;
 3 | use stateroom_wasm_host::WasmHostFactory;
 4 | 
 5 | pub fn dev(port: u16) -> anyhow::Result<()> {
 6 |     let config = locate_config()?; // TODO: default to a configuration if file not found.
 7 | 
 8 |     let build_result = do_build(&config)?;
 9 |     let host_factory = WasmHostFactory::new(build_result.server_wasm)?;
10 | 
11 |     Server::default()
12 |         .with_port(port)
13 |         .with_static_path(config.static_files)
14 |         .with_client_path(build_result.client_wasm)
15 |         .serve(host_factory)
16 |         .map_err(|e| e.into())
17 | }
18 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/commands/mod.rs:
--------------------------------------------------------------------------------
1 | pub mod build;
2 | pub mod dev;
3 | pub mod serve;
4 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/commands/serve.rs:
--------------------------------------------------------------------------------
 1 | use crate::cli_opts::ServeCommand;
 2 | use stateroom_server::Server;
 3 | use stateroom_wasm_host::WasmHostFactory;
 4 | use std::{ffi::OsStr, path::Path, time::Duration};
 5 | 
 6 | pub fn serve(serve_opts: ServeCommand) -> anyhow::Result<()> {
 7 |     let ServeCommand {
 8 |         module,
 9 |         port,
10 |         heartbeat_interval,
11 |         heartbeat_timeout,
12 |     } = serve_opts;
13 | 
14 |     let path = Path::new(&module);
15 |     let ext = path
16 |         .extension()
17 |         .and_then(OsStr::to_str)
18 |         .map(str::to_ascii_lowercase);
19 | 
20 |     let server_settings = Server {
21 |         heartbeat_interval: Duration::from_secs(heartbeat_interval),
22 |         heartbeat_timeout: Duration::from_secs(heartbeat_timeout),
23 |         port,
24 |         ..Server::default()
25 |     };
26 | 
27 |     if let Some("wasm" | "wat") = ext.as_deref() {
28 |         let host_factory = WasmHostFactory::new(&module)?;
29 |         server_settings.serve(host_factory).map_err(|e| e.into())
30 |     } else if path.is_file() {
31 |         unimplemented!("Only .wasm and .wat files are supported.");
32 |     } else if path.is_dir() {
33 |         let server_module = path.join("server.wasm");
34 | 
35 |         if !server_module.exists() {
36 |             return Err(anyhow::anyhow!("Expected server.wasm"));
37 |         }
38 | 
39 |         let static_dir = path.join("static");
40 | 
41 |         let static_dir = if static_dir.exists() {
42 |             Some(static_dir.to_str().unwrap().to_string())
43 |         } else {
44 |             None
45 |         };
46 | 
47 |         let host_factory = WasmHostFactory::new(&server_module)?;
48 | 
49 |         server_settings
50 |             .with_static_path(static_dir)
51 |             .serve(host_factory)
52 |             .map_err(|e| e.into())
53 |     } else {
54 |         Err(anyhow::anyhow!("Expected a file or directory."))
55 |     }
56 | }
57 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/config.rs:
--------------------------------------------------------------------------------
 1 | use serde::{Deserialize, Serialize};
 2 | 
 3 | #[derive(Serialize, Deserialize, Debug, Default)]
 4 | pub struct GlobalConfig {
 5 |     pub token: Option<String>,
 6 | }
 7 | 
 8 | /// Represents a `stateroom.toml` file, used to configure
 9 | /// a Stateroom server.
10 | #[derive(Serialize, Deserialize, Debug, Default)]
11 | pub struct StateroomConfig {
12 |     /// Directory to serve static files from.
13 |     ///
14 |     /// If this is provided, the server will attempt to serve HTTP requests
15 |     /// relative to this directory, if they do not match other paths.
16 |     pub static_files: Option<String>,
17 | 
18 |     /// A unique ID for the service used for deployment.
19 |     pub service_id: Option<String>,
20 | 
21 |     /// Optional configuration for building a WebAssembly module for the
22 |     /// client.
23 |     ///
24 |     /// This allows you to use `stateroom dev` to build both the server- and
25 |     /// client-side code from the same workspace in one command.
26 |     pub client: Option<ClientConfig>,
27 | 
28 |     /// Configuration for building the WebAssembly module to serve.
29 |     #[serde(default)]
30 |     pub service: ServiceConfig,
31 | }
32 | 
33 | /// Configuration for generating a client-side WebAssembly module.
34 | #[derive(Serialize, Deserialize, Debug)]
35 | pub struct ClientConfig {
36 |     /// The name of the package to build.
37 |     ///
38 |     /// Must be discoverable by cargo from the directory that `stateroom`
39 |     /// is run from (i.e. `cargo build -p <package>` should succeed)
40 |     pub package: String,
41 |     pub optimization_level: Option<String>,
42 | }
43 | 
44 | /// Configuration for generating and serving a Stateroom service module.
45 | #[derive(Serialize, Deserialize, Debug, Default)]
46 | pub struct ServiceConfig {
47 |     /// The name of the package to build.
48 |     ///
49 |     /// Must be discoverable by cargo from the directory that `stateroom`
50 |     /// is run from (i.e. `cargo build -p <package>` should succeed)
51 |     ///
52 |     /// If this is empty, builds the package we are in (i.e. the package that
53 |     /// `cargo build` builds.)
54 |     pub package: Option<String>,
55 | }
56 | 


--------------------------------------------------------------------------------
/stateroom-cli/src/lib.rs:
--------------------------------------------------------------------------------
1 | pub mod cli_opts;
2 | mod commands;
3 | mod config;
4 | 
5 | pub use commands::build::build;
6 | pub use commands::dev::dev;
7 | pub use commands::serve::serve;
8 | mod build_util;
9 | 


--------------------------------------------------------------------------------
/stateroom-server/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom-server"
 3 | version = "0.4.4"
 4 | edition = "2021"
 5 | readme = "../README.md"
 6 | repository = "https://github.com/drifting-in-space/stateroom"
 7 | license = "MIT OR Apache-2.0"
 8 | keywords = ["websocket"]
 9 | description = "Server for Stateroom services over WebSockets"
10 | 
11 | [dependencies]
12 | axum = { version = "0.7.5", features = ["ws"] }
13 | dashmap = "6"
14 | futures-util = "0.3.30"
15 | stateroom = {path="../stateroom", version="0.4.1"}
16 | tokio = { version = "1.37.0", features = ["rt-multi-thread"] }
17 | tower-http = { version="0.5.2", features=["fs"] }
18 | tracing = "0.1.40"
19 | 


--------------------------------------------------------------------------------
/stateroom-server/src/lib.rs:
--------------------------------------------------------------------------------
  1 | use crate::server::Event;
  2 | use axum::{
  3 |     extract::{ws::WebSocket, State, WebSocketUpgrade},
  4 |     routing::get,
  5 |     Router,
  6 | };
  7 | use server::ServerState;
  8 | use stateroom::StateroomServiceFactory;
  9 | use std::{
 10 |     net::{IpAddr, SocketAddr},
 11 |     sync::Arc,
 12 |     time::Duration,
 13 | };
 14 | use tokio::{net::TcpListener, select};
 15 | use tower_http::services::ServeDir;
 16 | 
 17 | mod server;
 18 | 
 19 | const DEFAULT_IP: &str = "0.0.0.0";
 20 | 
 21 | #[derive(Debug)]
 22 | pub struct Server {
 23 |     /// The duration of time between server-initiated WebSocket heartbeats.
 24 |     ///
 25 |     /// Defaults to 30 seconds.
 26 |     pub heartbeat_interval: Duration,
 27 | 
 28 |     /// The minimum amount of time between client heartbeats before a connection is dropped.
 29 |     ///
 30 |     /// Defaults to 5 minutes.
 31 |     pub heartbeat_timeout: Duration,
 32 | 
 33 |     /// The port to run the server on. Defaults to 8080.
 34 |     pub port: u16,
 35 | 
 36 |     /// The IP to listen on. Defaults to 0.0.0.0.
 37 |     pub ip: String,
 38 | 
 39 |     /// A local filesystem path to serve static files from, or None (default).
 40 |     pub static_path: Option<String>,
 41 | 
 42 |     /// A local filesystem path to serve from /client, or None (default).
 43 |     pub client_path: Option<String>,
 44 | }
 45 | 
 46 | impl Default for Server {
 47 |     fn default() -> Self {
 48 |         Server {
 49 |             heartbeat_interval: Duration::from_secs(30),
 50 |             heartbeat_timeout: Duration::from_secs(300),
 51 |             port: 8080,
 52 |             ip: DEFAULT_IP.to_string(),
 53 |             static_path: None,
 54 |             client_path: None,
 55 |         }
 56 |     }
 57 | }
 58 | 
 59 | impl Server {
 60 |     #[must_use]
 61 |     pub fn new() -> Self {
 62 |         Server::default()
 63 |     }
 64 | 
 65 |     #[must_use]
 66 |     pub fn with_static_path(mut self, static_path: Option<String>) -> Self {
 67 |         self.static_path = static_path;
 68 |         self
 69 |     }
 70 | 
 71 |     #[must_use]
 72 |     pub fn with_client_path(mut self, client_path: Option<String>) -> Self {
 73 |         self.client_path = client_path;
 74 |         self
 75 |     }
 76 | 
 77 |     #[must_use]
 78 |     pub fn with_heartbeat_interval(mut self, duration_seconds: u64) -> Self {
 79 |         self.heartbeat_interval = Duration::from_secs(duration_seconds);
 80 |         self
 81 |     }
 82 | 
 83 |     #[must_use]
 84 |     pub fn with_heartbeat_timeout(mut self, duration_seconds: u64) -> Self {
 85 |         self.heartbeat_timeout = Duration::from_secs(duration_seconds);
 86 |         self
 87 |     }
 88 | 
 89 |     #[must_use]
 90 |     pub fn with_port(mut self, port: u16) -> Self {
 91 |         self.port = port;
 92 |         self
 93 |     }
 94 | 
 95 |     #[must_use]
 96 |     pub fn with_ip(mut self, ip: String) -> Self {
 97 |         self.ip = ip;
 98 |         self
 99 |     }
100 | 
101 |     /// Start a server given a [StateroomService].
102 |     ///
103 |     /// This function blocks until the server is terminated. While it is running, the following
104 |     /// endpoints are available:
105 |     /// - `/` (GET): return HTTP 200 if the server is running (useful as a baseline status check)
106 |     /// - `/ws` (GET): initiate a WebSocket connection to the stateroom service.
107 |     pub async fn serve_async(self, factory: impl StateroomServiceFactory) -> std::io::Result<()> {
108 |         let server_state = Arc::new(ServerState::new(factory));
109 | 
110 |         let mut app = Router::new()
111 |             .route("/ws", get(serve_websocket))
112 |             .with_state(server_state);
113 | 
114 |         if let Some(static_path) = self.static_path {
115 |             app = app.nest_service("/", ServeDir::new(static_path));
116 |         }
117 | 
118 |         if let Some(client_path) = self.client_path {
119 |             app = app.nest_service("/client", ServeDir::new(client_path));
120 |         }
121 | 
122 |         let ip = self.ip.parse::<IpAddr>().unwrap();
123 |         let addr = SocketAddr::new(ip, self.port);
124 |         let listener = TcpListener::bind(&addr).await?;
125 |         axum::serve(listener, app).await?;
126 | 
127 |         Ok(())
128 |     }
129 | 
130 |     /// Start a server given a [StateroomService].
131 |     ///
132 |     /// This function blocks until the server is terminated. While it is running, the following
133 |     /// endpoints are available:
134 |     /// - `/` (GET): return HTTP 200 if the server is running (useful as a baseline status check)
135 |     /// - `/ws` (GET): initiate a WebSocket connection to the stateroom service.
136 |     pub fn serve(self, factory: impl StateroomServiceFactory) -> std::io::Result<()> {
137 |         tokio::runtime::Builder::new_multi_thread()
138 |             .enable_all()
139 |             .build()
140 |             .unwrap()
141 |             .block_on(async { self.serve_async(factory).await })
142 |     }
143 | }
144 | 
145 | pub async fn serve_websocket(
146 |     ws: WebSocketUpgrade,
147 |     State(state): State<Arc<ServerState>>,
148 | ) -> axum::response::Response {
149 |     ws.on_upgrade(move |socket| handle_socket(socket, state))
150 | }
151 | 
152 | async fn handle_socket(mut socket: WebSocket, state: Arc<ServerState>) {
153 |     let (send, mut recv, client_id) = state.connect();
154 | 
155 |     loop {
156 |         select! {
157 |             msg = recv.recv() => {
158 |                 match msg {
159 |                     Some(msg) => socket.send(msg).await.unwrap(),
160 |                     None => break,
161 |                 }
162 |             },
163 |             msg = socket.recv() => {
164 |                 match msg {
165 |                     Some(Ok(msg)) => send.send(Event::Message { client: client_id, message: msg }).await.unwrap(),
166 |                     Some(Err(err)) => {
167 |                         tracing::warn!(?err, "Error receiving message from client.");
168 |                     },
169 |                     None => break,
170 |                 }
171 |             }
172 |         }
173 |     }
174 | 
175 |     state.remove(&client_id);
176 | }
177 | 


--------------------------------------------------------------------------------
/stateroom-server/src/server.rs:
--------------------------------------------------------------------------------
  1 | use axum::extract::ws::Message;
  2 | use dashmap::DashMap;
  3 | use stateroom::{
  4 |     ClientId, MessagePayload, MessageRecipient, StateroomContext, StateroomService,
  5 |     StateroomServiceFactory,
  6 | };
  7 | use std::{
  8 |     sync::{atomic::AtomicU32, Arc, Mutex},
  9 |     time::Duration,
 10 | };
 11 | use tokio::{
 12 |     sync::mpsc::{Receiver, Sender},
 13 |     task::JoinHandle,
 14 | };
 15 | 
 16 | /// A [StateroomContext] implementation for [StateroomService]s hosted in the
 17 | /// context of a [ServiceActor].
 18 | #[derive(Clone)]
 19 | pub struct ServerStateroomContext {
 20 |     senders: Arc<DashMap<ClientId, Sender<Message>>>,
 21 |     event_sender: Arc<Sender<Event>>,
 22 |     timer_handle: Arc<Mutex<Option<tokio::task::JoinHandle<()>>>>,
 23 | }
 24 | 
 25 | impl ServerStateroomContext {
 26 |     pub fn try_send(&self, recipient: MessageRecipient, message: Message) {
 27 |         match recipient {
 28 |             MessageRecipient::Broadcast => {
 29 |                 for sender in self.senders.iter() {
 30 |                     sender.value().try_send(message.clone()).unwrap();
 31 |                 }
 32 |             }
 33 |             MessageRecipient::EveryoneExcept(skip_client_id) => {
 34 |                 for sender in self.senders.iter() {
 35 |                     if sender.key() != &skip_client_id {
 36 |                         sender.try_send(message.clone()).unwrap();
 37 |                     }
 38 |                 }
 39 |             }
 40 |             MessageRecipient::Client(client_id) => {
 41 |                 if let Some(sender) = self.senders.get(&client_id) {
 42 |                     sender.try_send(message).unwrap();
 43 |                 } else {
 44 |                     tracing::error!(?client_id, "No sender for client.");
 45 |                 }
 46 |             }
 47 |         }
 48 |     }
 49 | }
 50 | 
 51 | impl StateroomContext for ServerStateroomContext {
 52 |     fn send_message(
 53 |         &self,
 54 |         recipient: impl Into<MessageRecipient>,
 55 |         message: impl Into<MessagePayload>,
 56 |     ) {
 57 |         let message: MessagePayload = message.into();
 58 |         let message: Message = match message {
 59 |             MessagePayload::Text(s) => Message::Text(s),
 60 |             MessagePayload::Bytes(b) => Message::Binary(b),
 61 |         };
 62 |         self.try_send(recipient.into(), message);
 63 |     }
 64 | 
 65 |     fn set_timer(&self, ms_delay: u32) {
 66 |         let sender = self.event_sender.clone();
 67 |         let handle = tokio::spawn(async move {
 68 |             tokio::time::sleep(Duration::from_millis(ms_delay as u64)).await;
 69 |             sender.send(Event::Timer).await.unwrap();
 70 |         });
 71 | 
 72 |         let mut c = self
 73 |             .timer_handle
 74 |             .lock()
 75 |             .expect("timer handle lock poisoned");
 76 |         if let Some(c) = c.take() {
 77 |             c.abort();
 78 |         }
 79 |         *c = Some(handle);
 80 |     }
 81 | }
 82 | 
 83 | #[derive(Debug)]
 84 | pub struct ServerState {
 85 |     pub handle: JoinHandle<()>,
 86 |     pub inbound_sender: Sender<Event>,
 87 |     pub senders: Arc<DashMap<ClientId, Sender<Message>>>,
 88 |     pub next_client_id: AtomicU32,
 89 | }
 90 | 
 91 | #[derive(Debug)]
 92 | pub enum Event {
 93 |     Message { client: ClientId, message: Message },
 94 |     Join { client: ClientId },
 95 |     Leave { client: ClientId },
 96 |     Timer,
 97 | }
 98 | 
 99 | impl ServerState {
100 |     pub fn new(factory: impl StateroomServiceFactory) -> Self {
101 |         let (tx, mut rx) = tokio::sync::mpsc::channel::<Event>(100);
102 | 
103 |         let senders = Arc::new(DashMap::new());
104 | 
105 |         let senders_ = senders.clone();
106 |         let tx_ = tx.clone();
107 |         let handle = tokio::spawn(async move {
108 |             let context = Arc::new(ServerStateroomContext {
109 |                 senders: senders_.clone(),
110 |                 event_sender: Arc::new(tx_),
111 |                 timer_handle: Arc::new(Mutex::new(None)),
112 |             });
113 | 
114 |             let mut service = factory.build("", context.clone()).unwrap();
115 |             service.init(context.as_ref());
116 | 
117 |             loop {
118 |                 let msg = rx.recv().await;
119 |                 match msg {
120 |                     Some(Event::Message { client, message }) => match message {
121 |                         Message::Text(msg) => {
122 |                             service.message(client, MessagePayload::Text(msg), context.as_ref())
123 |                         }
124 |                         Message::Binary(msg) => {
125 |                             service.message(client, MessagePayload::Bytes(msg), context.as_ref())
126 |                         }
127 |                         Message::Close(_) => {}
128 |                         msg => tracing::warn!("Ignoring unhandled message: {:?}", msg),
129 |                     },
130 |                     Some(Event::Join { client }) => service.connect(client, context.as_ref()),
131 |                     Some(Event::Leave { client }) => service.disconnect(client, context.as_ref()),
132 |                     Some(Event::Timer) => {
133 |                         service.timer(context.as_ref());
134 |                     }
135 |                     None => break,
136 |                 }
137 |             }
138 |         });
139 | 
140 |         Self {
141 |             handle,
142 |             inbound_sender: tx,
143 |             senders,
144 |             next_client_id: AtomicU32::new(1),
145 |         }
146 |     }
147 | 
148 |     pub fn remove(&self, client: &ClientId) {
149 |         self.inbound_sender
150 |             .try_send(Event::Leave { client: *client })
151 |             .unwrap();
152 |         self.senders.remove(client);
153 |     }
154 | 
155 |     pub fn connect(&self) -> (Sender<Event>, Receiver<Message>, ClientId) {
156 |         let client_id = self.next_client_id();
157 |         let (tx, rx) = tokio::sync::mpsc::channel::<Message>(100);
158 | 
159 |         self.senders.insert(client_id, tx);
160 |         self.inbound_sender
161 |             .try_send(Event::Join { client: client_id })
162 |             .unwrap();
163 |         (self.inbound_sender.clone(), rx, client_id)
164 |     }
165 | 
166 |     fn next_client_id(&self) -> ClientId {
167 |         let r = self
168 |             .next_client_id
169 |             .fetch_add(1, std::sync::atomic::Ordering::Relaxed);
170 |         ClientId(r)
171 |     }
172 | }
173 | 


--------------------------------------------------------------------------------
/stateroom-wasm-host/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom-wasm-host"
 3 | version = "0.4.4"
 4 | edition = "2018"
 5 | readme = "README.md"
 6 | repository = "https://github.com/drifting-in-space/stateroom"
 7 | license = "MIT OR Apache-2.0"
 8 | keywords = ["websocket", "webassembly", "stateroom"]
 9 | description = "A Stateroom service implementation that takes a WebAssembly module and delegates behavior to it."
10 | 
11 | [dependencies]
12 | anyhow = "1.0.45"
13 | byteorder = "1.4.3"
14 | stateroom = {path="../stateroom", version="0.4.0", features=["serde"]}
15 | wasmtime = "24.0.0"
16 | tracing = "0.1.28"
17 | wasi-common = "24.0.0"
18 | bincode = "1.3.3"
19 | 


--------------------------------------------------------------------------------
/stateroom-wasm-host/README.md:
--------------------------------------------------------------------------------
 1 | # stateroom-wasm-host
 2 | 
 3 | This crate loads a Stateroom WebAssembly module and wraps it in an interface
 4 | that implements StateroomService, so that it can be used interchangably with
 5 | native StateroomService implementations. If you only want to serve WebAssembly
 6 | modules, you can use the `stateroom` command-line application (which uses this
 7 | crate) instead of using this crate directly.
 8 | 
 9 | ## WebAssembly interface
10 | 
11 | The host expects that the WebAssembly module provided to it will conform to
12 | a particular interface (that is, has particular named imports and exports).
13 | Eventually, WebAssembly extensions like Interface Types may allow us to
14 | formalize this interface.
15 | 
16 | Code generated by `stateroom-wasm-macro` automatically conforms to the interface,
17 | but if you are implementing in a non-Rust language, it's up to you to ensure that
18 | imports and exports are available and correctly typed, or else a runtime error
19 | will occur when the module is loaded.
20 | 
21 | ### Exports
22 | 
23 | The module is expected to export these functions:
24 | 
25 | - `fn jam_malloc(size: u32) -> u32`: Allocate `size` bytes of memory inside the WebAssembly module and return a pointer.
26 | - `fn jam_free(loc: *mut u8, size: u32)`: Free `size` bytes of memory starting at `loc`.
27 | - `fn initialize(room_id_ptr: *const u8, room_id_len: u32)`: Initialize the object with the provided room ID (passed as a pointer, length pair).
28 | - `fn connect(client_id: u32)`: Called immediately after the given user has connected.
29 | - `fn disconnect(client_id: u32)`: Called immediately after the given user has disconnected.
30 | - `fn timer()`: Called if the instance set a timer which has triggered (see `set_timer()` under imports).
31 | - `fn message(client_id: u32, ptr: *const u8, len: u32)`: Called when the instance receives a text message from a client. The message is passed as a (pointer, length) pair.
32 | - `fn binary(client_id: u32, ptr: *const u8, len: u32)`: Called when the instance receives a binary message from a client. The message is passed as a (pointer, length) pair.
33 | 
34 | ### Imports
35 | 
36 | The module may import any of these functions from the environment:
37 | 
38 | - `fn send_message(client_id: u32, message: *const u8, len: u32)`: Send the text message, provided as a (pointer, length) pair. If `client_id == 0`, the mesage will
39 | be broadcast to all connected users.
40 | - `fn send_binary(client_id: u32, message: *const u8, len: u32)`: Send the binary message, provided as a (pointer, length) pair. If `client_id == 0`, the mesage will
41 | be broadcast to all connected users.
42 | - `fn set_timer(ms_delay: u32)`: Asks the host runtime to call `timer()` in a given
43 | number of milliseconds. Replaces any previous timer request. If `ms_delay` is 0,
44 | the previous timer will be cancelled but no new timer will be set.
45 | 


--------------------------------------------------------------------------------
/stateroom-wasm-host/src/lib.rs:
--------------------------------------------------------------------------------
 1 | //! This module provides a [stateroom::StateroomService] implementation that is backed by a
 2 | //! WebAssembly module. It is the counterpart to `stateroom-wasm`, which is used to
 3 | //! implement a compatible guest module.
 4 | 
 5 | use std::{
 6 |     error::Error,
 7 |     fmt::{Debug, Display},
 8 | };
 9 | pub use wasm_host::WasmHost;
10 | pub use wasm_host_factory::WasmHostFactory;
11 | 
12 | mod wasm_host;
13 | mod wasm_host_factory;
14 | 
15 | /// An error encountered while running WebAssembly.
16 | #[derive(Debug)]
17 | pub enum WasmRuntimeError {
18 |     CouldNotImportMemory,
19 |     CouldNotImportGlobal,
20 |     InvalidApiVersion,
21 |     InvalidProtocolVersion,
22 | }
23 | 
24 | impl Display for WasmRuntimeError {
25 |     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
26 |         Debug::fmt(&self, f)
27 |     }
28 | }
29 | 
30 | impl Error for WasmRuntimeError {
31 |     fn description(&self) -> &str {
32 |         match self {
33 |             Self::CouldNotImportMemory => "Could not import memory from wasm instance.",
34 |             Self::CouldNotImportGlobal => "Could not read global variable from wasm instance.",
35 |             Self::InvalidApiVersion => {
36 |                 "WebAssembly module has an incompatible Stateroom API version."
37 |             }
38 |             Self::InvalidProtocolVersion => {
39 |                 "WebAssembly module has an incompatible Stateroom protocol version."
40 |             }
41 |         }
42 |     }
43 | }
44 | 


--------------------------------------------------------------------------------
/stateroom-wasm-host/src/wasm_host.rs:
--------------------------------------------------------------------------------
  1 | use crate::WasmRuntimeError;
  2 | use anyhow::{Context, Result};
  3 | use byteorder::{LittleEndian, ReadBytesExt};
  4 | use stateroom::{
  5 |     ClientId, MessageFromProcess, MessagePayload, MessageToProcess, StateroomContext,
  6 |     StateroomService,
  7 | };
  8 | use std::{borrow::BorrowMut, sync::Arc};
  9 | use wasi_common::{sync::WasiCtxBuilder, WasiCtx};
 10 | use wasmtime::{Caller, Engine, Extern, Instance, Linker, Memory, Module, Store, TypedFunc, Val};
 11 | 
 12 | const ENV: &str = "env";
 13 | const EXT_MEMORY: &str = "memory";
 14 | const EXT_FN_SEND: &str = "stateroom_send";
 15 | const EXT_FN_RECV: &str = "stateroom_recv";
 16 | const EXT_FN_MALLOC: &str = "stateroom_malloc";
 17 | const EXT_FN_FREE: &str = "stateroom_free";
 18 | const EXT_STATEROOM_VERSION: &str = "STATEROOM_API_VERSION";
 19 | const EXT_STATEROOM_PROTOCOL: &str = "STATEROOM_API_PROTOCOL";
 20 | 
 21 | const EXPECTED_API_VERSION: i32 = 1;
 22 | const EXPECTED_PROTOCOL_VERSION: i32 = 0;
 23 | 
 24 | /// Hosts a [stateroom::StateroomService] implemented by a WebAssembly module.
 25 | pub struct WasmHost {
 26 |     store: Store<WasiCtx>,
 27 |     memory: Memory,
 28 | 
 29 |     fn_malloc: TypedFunc<u32, u32>,
 30 |     fn_free: TypedFunc<(u32, u32), ()>,
 31 |     fn_recv: TypedFunc<(u32, u32), ()>,
 32 | }
 33 | 
 34 | impl WasmHost {
 35 |     fn put_data(&mut self, data: &[u8]) -> Result<(u32, u32)> {
 36 |         #[allow(clippy::cast_possible_truncation)]
 37 |         let len = data.len() as u32;
 38 |         let pt = self.fn_malloc.call(&mut self.store, len)?;
 39 | 
 40 |         self.memory.write(&mut self.store, pt as usize, data)?;
 41 | 
 42 |         Ok((pt, len))
 43 |     }
 44 | 
 45 |     fn try_recv(&mut self, message: MessageToProcess) -> Result<()> {
 46 |         let payload = bincode::serialize(&message).unwrap();
 47 |         let (pt, len) = self.put_data(&payload)?;
 48 | 
 49 |         self.fn_recv.call(&mut self.store, (pt, len))?;
 50 |         self.fn_free.call(&mut self.store, (pt, len))?;
 51 | 
 52 |         Ok(())
 53 |     }
 54 | }
 55 | 
 56 | impl StateroomService for WasmHost {
 57 |     fn init(&mut self, _: &impl StateroomContext) {
 58 |         let message = MessageToProcess::Init;
 59 |         self.try_recv(message).unwrap();
 60 |     }
 61 | 
 62 |     fn message(&mut self, sender: ClientId, message: MessagePayload, _: &impl StateroomContext) {
 63 |         let message = MessageToProcess::Message { sender, message };
 64 |         self.try_recv(message).unwrap();
 65 |     }
 66 | 
 67 |     fn connect(&mut self, client: ClientId, _: &impl StateroomContext) {
 68 |         let message = MessageToProcess::Connect { client };
 69 |         self.try_recv(message).unwrap();
 70 |     }
 71 | 
 72 |     fn disconnect(&mut self, client: ClientId, _: &impl StateroomContext) {
 73 |         let message = MessageToProcess::Disconnect { client };
 74 |         self.try_recv(message).unwrap();
 75 |     }
 76 | 
 77 |     fn timer(&mut self, _: &impl StateroomContext) {
 78 |         let message = MessageToProcess::Timer;
 79 |         self.try_recv(message).unwrap();
 80 |     }
 81 | }
 82 | 
 83 | #[inline]
 84 | fn get_memory<T>(caller: &mut Caller<'_, T>) -> Memory {
 85 |     match caller.get_export(EXT_MEMORY) {
 86 |         Some(Extern::Memory(mem)) => mem,
 87 |         _ => panic!(),
 88 |     }
 89 | }
 90 | 
 91 | #[inline]
 92 | fn get_u8_vec<'a, T>(
 93 |     caller: &'a Caller<'_, T>,
 94 |     memory: &'a Memory,
 95 |     start: u32,
 96 |     len: u32,
 97 | ) -> &'a [u8] {
 98 |     let data = memory
 99 |         .data(caller)
100 |         .get(start as usize..(start + len) as usize);
101 |     match data {
102 |         Some(data) => data,
103 |         None => panic!(),
104 |     }
105 | }
106 | 
107 | pub fn get_global<T>(
108 |     store: &mut Store<T>,
109 |     memory: &mut Memory,
110 |     instance: &Instance,
111 |     name: &str,
112 | ) -> Result<i32> {
113 |     #[allow(clippy::cast_sign_loss)]
114 |     let i: u32 = {
115 |         let mem_location = instance
116 |             .get_global(store.borrow_mut(), name)
117 |             .ok_or(WasmRuntimeError::CouldNotImportGlobal)?;
118 | 
119 |         match mem_location.get(store.borrow_mut()) {
120 |             Val::I32(i) => Ok(i),
121 |             _ => Err(WasmRuntimeError::CouldNotImportGlobal),
122 |         }? as u32
123 |     };
124 | 
125 |     #[allow(clippy::cast_possible_truncation)]
126 |     let mut value = memory
127 |         .data(store)
128 |         .get(i as usize..(i as usize + std::mem::size_of::<i32>()))
129 |         .ok_or(WasmRuntimeError::CouldNotImportGlobal)?;
130 |     let result = value.read_i32::<LittleEndian>()?;
131 |     Ok(result)
132 | }
133 | 
134 | impl WasmHost {
135 |     pub fn new(
136 |         room_id: &str,
137 |         module: &Module,
138 |         engine: &Engine,
139 |         context: Arc<impl StateroomContext>,
140 |     ) -> Result<Self> {
141 |         let wasi = WasiCtxBuilder::new().inherit_stdio().build();
142 | 
143 |         let mut store = Store::new(engine, wasi);
144 |         let mut linker = Linker::new(engine);
145 |         wasi_common::sync::add_to_linker(&mut linker, |s| s)?;
146 | 
147 |         {
148 |             #[allow(clippy::redundant_clone)]
149 |             let context = context.clone();
150 |             linker.func_wrap(
151 |                 ENV,
152 |                 EXT_FN_SEND,
153 |                 move |mut caller: Caller<'_, WasiCtx>, start: u32, len: u32| {
154 |                     let memory = get_memory(&mut caller);
155 |                     let message = get_u8_vec(&caller, &memory, start, len);
156 |                     let message: MessageFromProcess = bincode::deserialize(message).unwrap();
157 | 
158 |                     match message {
159 |                         MessageFromProcess::Message { recipient, message } => {
160 |                             context.send_message(recipient, message);
161 |                         }
162 |                         MessageFromProcess::SetTimer { ms_delay } => {
163 |                             context.set_timer(ms_delay);
164 |                         }
165 |                     };
166 | 
167 |                     Ok(())
168 |                 },
169 |             )?;
170 |         }
171 | 
172 |         let instance = linker.instantiate(&mut store, module)?;
173 | 
174 |         let fn_malloc = instance.get_typed_func::<u32, u32>(&mut store, EXT_FN_MALLOC)?;
175 | 
176 |         let fn_free = instance.get_typed_func::<(u32, u32), ()>(&mut store, EXT_FN_FREE)?;
177 | 
178 |         let fn_recv = instance.get_typed_func::<(u32, u32), ()>(&mut store, EXT_FN_RECV)?;
179 | 
180 |         let mut memory = instance
181 |             .get_memory(&mut store, EXT_MEMORY)
182 |             .ok_or(WasmRuntimeError::CouldNotImportMemory)?;
183 | 
184 |         {
185 |             let room_id = room_id.as_bytes();
186 |             #[allow(clippy::cast_possible_truncation)]
187 |             let len = room_id.len() as u32;
188 |             let pt = fn_malloc.call(&mut store, len)?;
189 | 
190 |             memory.write(&mut store, pt as usize, room_id)?;
191 | 
192 |             fn_free.call(&mut store, (pt, len))?;
193 |         }
194 | 
195 |         if get_global(&mut store, &mut memory, &instance, EXT_STATEROOM_VERSION)
196 |             .context("Stateroom version")?
197 |             != EXPECTED_API_VERSION
198 |         {
199 |             return Err(WasmRuntimeError::InvalidApiVersion.into());
200 |         }
201 | 
202 |         if get_global(&mut store, &mut memory, &instance, EXT_STATEROOM_PROTOCOL)
203 |             .context("Stateroom protocol")?
204 |             != EXPECTED_PROTOCOL_VERSION
205 |         {
206 |             return Err(WasmRuntimeError::InvalidProtocolVersion.into());
207 |         }
208 | 
209 |         Ok(WasmHost {
210 |             store,
211 |             memory,
212 |             fn_malloc,
213 |             fn_free,
214 |             fn_recv,
215 |         })
216 |     }
217 | }
218 | 


--------------------------------------------------------------------------------
/stateroom-wasm-host/src/wasm_host_factory.rs:
--------------------------------------------------------------------------------
 1 | use crate::wasm_host::WasmHost;
 2 | use anyhow::Result;
 3 | use stateroom::{StateroomContext, StateroomServiceFactory};
 4 | use std::{path::Path, sync::Arc};
 5 | use wasmtime::{Engine, Module};
 6 | 
 7 | /// Loads and caches a WebAssembly module such that a [WasmHost] instance can be
 8 | /// created from it.
 9 | ///
10 | /// This struct is cheaply cloneable, so it can be used to create multiple instances
11 | /// of the same module.
12 | #[derive(Clone)]
13 | pub struct WasmHostFactory {
14 |     engine: Arc<Engine>,
15 |     module: Arc<Module>,
16 | }
17 | 
18 | impl StateroomServiceFactory for WasmHostFactory {
19 |     type Service = WasmHost;
20 |     type Error = anyhow::Error;
21 | 
22 |     fn build(
23 |         &self,
24 |         room_id: &str,
25 |         context: Arc<impl StateroomContext>,
26 |     ) -> Result<Self::Service, Self::Error> {
27 |         WasmHost::new(room_id, self.module.as_ref(), self.engine.as_ref(), context)
28 |     }
29 | }
30 | 
31 | impl WasmHostFactory {
32 |     pub fn new<P>(wasm_file: P) -> Result<Self>
33 |     where
34 |         P: AsRef<Path>,
35 |     {
36 |         let engine = Engine::default();
37 |         tracing::info!(wasm_file=?wasm_file.as_ref(), "Loading WebAssembly module");
38 |         let module = Module::from_file(&engine, wasm_file)?;
39 |         tracing::info!("WebAssembly module loaded");
40 | 
41 |         Ok(WasmHostFactory {
42 |             engine: Arc::new(engine),
43 |             module: Arc::new(module),
44 |         })
45 |     }
46 | 
47 |     #[must_use]
48 |     pub fn new_with_shared_module(engine: Arc<Engine>, module: Arc<Module>) -> Self {
49 |         WasmHostFactory { engine, module }
50 |     }
51 | }
52 | 


--------------------------------------------------------------------------------
/stateroom-wasm/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom-wasm"
 3 | version = "0.4.4"
 4 | edition = "2018"
 5 | readme = "README.md"
 6 | repository = "https://github.com/drifting-in-space/stateroom"
 7 | license = "MIT OR Apache-2.0"
 8 | keywords = ["websocket", "webassembly", "stateroom"]
 9 | description = "A macro for building a Stateroom service as a WebAssembly module."
10 | 
11 | [dependencies]
12 | stateroom-wasm-macro = {path="./stateroom-wasm-macro", version="0.4.0"}
13 | stateroom = {path="../stateroom", version="0.4.0", features=["serde"]}
14 | bincode = "1.3.3"
15 | 


--------------------------------------------------------------------------------
/stateroom-wasm/README.md:
--------------------------------------------------------------------------------
 1 | # `stateroom-wasm`
 2 | 
 3 | `stateroom-wasm` is a companion crate to `stateroom` that helps you package and
 4 | export services as WebAssembly modules.
 5 | 
 6 | ## `#[stateroom_wasm]` macro
 7 | 
 8 | WebAssembly modules must import and export certain named functions in order for the
 9 | Stateroom server to understand them. `stateroom_wasm` provides the `#[stateroom_wasm]` module, 
10 | which should be applied to an item (`struct`, `enum`, or `type` alias) that implements 
11 | `SimpleStateroomService`.
12 | 
13 | A Stateroom-compatible WebAssembly module must contain exactly one service. If you
14 | need to generate multiple services for your application, currently the best approach
15 | is to make a crate for each service.
16 | 
17 | It's possible to generate bindings for a service that belongs to another module using
18 | a `type` alias:
19 | 
20 | ```rust
21 | use stateroom_wasm::stateroom_wasm;
22 | use some_module::SomeService;
23 | 
24 | #[stateroom_wasm]
25 | type Service = SomeService;
26 | ```
27 | 
28 | ## Execution model
29 | 
30 | Upon initialization, the generated model creates an instance of your `SimpleStateroomService`
31 | by calling its `new(room_id, context)` constructor. The context object that is passed in the
32 | constructor and subsequent function calls is a global static object that binds to functions
33 | imported from the host environment (like `send_message`).
34 | 
35 | ## Compiling
36 | 
37 | If you are using the Stateroom command-line interface, `stateroom dev` will build the
38 | current crate using the `wasm32-wasip1` target, and then load and serve the generated
39 | WebAssembly module.
40 | 
41 | If you would like to build it manually, make sure you have the `wasm32-wasip1` target installed
42 | and pass it as a target to `cargo build`:
43 | 
44 | ```bash
45 | $ rustup target add wasm32-wasip1
46 | $ cargo build --release --target=wasm32-wasip1
47 | ```
48 | 
49 | ## Embedding
50 | 
51 | This crate has a counterpart, `stateroom-wasm-host`, which can take a module generated with
52 | this crate and expose it through a StateroomService interface.
53 | 


--------------------------------------------------------------------------------
/stateroom-wasm/src/lib.rs:
--------------------------------------------------------------------------------
 1 | use stateroom::MessageFromProcess;
 2 | pub use stateroom::{ClientId, MessageRecipient, StateroomContext, StateroomService};
 3 | pub use stateroom::{MessagePayload, MessageToProcess};
 4 | pub use stateroom_wasm_macro::stateroom_wasm;
 5 | 
 6 | type Callback = unsafe extern "C" fn(*const u8, u32);
 7 | 
 8 | pub struct WrappedStateroomService<S: StateroomService> {
 9 |     state: S,
10 |     context: WasmStateroomContext,
11 | }
12 | 
13 | impl<S: StateroomService> WrappedStateroomService<S> {
14 |     pub fn new(state: S, callback: Callback) -> Self {
15 |         Self {
16 |             state,
17 |             context: WasmStateroomContext { callback },
18 |         }
19 |     }
20 | 
21 |     pub fn recv(&mut self, message_ptr: *const u8, message_len: u32) {
22 |         let message = unsafe { std::slice::from_raw_parts(message_ptr, message_len as usize) };
23 |         let message: MessageToProcess = bincode::deserialize(message).unwrap();
24 | 
25 |         match message {
26 |             MessageToProcess::Init => {
27 |                 self.state.init(&self.context);
28 |             }
29 |             MessageToProcess::Connect { client } => {
30 |                 self.state.connect(client, &self.context);
31 |             }
32 |             MessageToProcess::Disconnect { client } => {
33 |                 self.state.disconnect(client, &self.context);
34 |             }
35 |             MessageToProcess::Message { sender, message } => {
36 |                 self.state.message(sender, message, &self.context);
37 |             }
38 |             MessageToProcess::Timer => {
39 |                 self.state.timer(&self.context);
40 |             }
41 |         }
42 |     }
43 | }
44 | 
45 | #[derive(Clone)]
46 | struct WasmStateroomContext {
47 |     callback: Callback,
48 | }
49 | 
50 | impl WasmStateroomContext {
51 |     pub fn send(&self, message: &MessageFromProcess) {
52 |         let message = bincode::serialize(message).unwrap();
53 |         unsafe {
54 |             (self.callback)(message.as_ptr(), message.len() as u32);
55 |         }
56 |     }
57 | }
58 | 
59 | impl StateroomContext for WasmStateroomContext {
60 |     fn send_message(
61 |         &self,
62 |         recipient: impl Into<MessageRecipient>,
63 |         message: impl Into<MessagePayload>,
64 |     ) {
65 |         let message: MessagePayload = message.into();
66 |         let recipient: MessageRecipient = recipient.into();
67 | 
68 |         self.send(&MessageFromProcess::Message { recipient, message });
69 |     }
70 | 
71 |     fn set_timer(&self, ms_delay: u32) {
72 |         self.send(&MessageFromProcess::SetTimer { ms_delay });
73 |     }
74 | }
75 | 


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/stateroom-wasm/stateroom-wasm-macro/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom-wasm-macro"
 3 | version = "0.4.0"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | readme = "README.md"
 7 | repository = "https://github.com/drifting-in-space/stateroom"
 8 | license = "MIT OR Apache-2.0"
 9 | keywords = ["websocket", "webassembly", "stateroom"]
10 | description = "A macro for building a Stateroom service as a WebAssembly module."
11 | 
12 | [lib]
13 | proc-macro = true
14 | 
15 | [dependencies]
16 | proc-macro2 = "1.0.36"
17 | quote = "1.0.14"
18 | syn = {version="2.0.15", features=["full"]}
19 | 


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/stateroom-wasm/stateroom-wasm-macro/README.md:
--------------------------------------------------------------------------------
1 | # stateroom-wasm-macro
2 | 
3 | This crate contains a helper macro for generating WebAssembly from a [Stateroom](https://github.com/drifting-in-space/stateroom)
4 | service. You should use the `stateroom-wasm` crate instead of depending on this one.
5 | 


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/stateroom-wasm/stateroom-wasm-macro/src/lib.rs:
--------------------------------------------------------------------------------
  1 | extern crate proc_macro;
  2 | use proc_macro::TokenStream;
  3 | use proc_macro2::Ident;
  4 | use quote::quote;
  5 | use syn::{ItemEnum, ItemStruct, ItemType};
  6 | 
  7 | fn get_name(item: &proc_macro2::TokenStream) -> Option<Ident> {
  8 |     let ident = if let Ok(ItemStruct { ident, .. }) = syn::parse2(item.clone()) {
  9 |         ident
 10 |     } else if let Ok(ItemEnum { ident, .. }) = syn::parse2(item.clone()) {
 11 |         ident
 12 |     } else if let Ok(ItemType { ident, .. }) = syn::parse2(item.clone()) {
 13 |         ident
 14 |     } else {
 15 |         return None;
 16 |     };
 17 | 
 18 |     Some(ident)
 19 | }
 20 | 
 21 | #[allow(clippy::too_many_lines)]
 22 | fn stateroom_wasm_impl(item: &proc_macro2::TokenStream) -> proc_macro2::TokenStream {
 23 |     let name =
 24 |         get_name(item).expect("Can only use #[stateroom_wasm] on a struct, enum, or type alias.");
 25 | 
 26 |     quote! {
 27 |         #item
 28 | 
 29 |         mod _stateroom_wasm_macro_autogenerated {
 30 |             extern crate alloc;
 31 | 
 32 |             use super::#name;
 33 | 
 34 |             // Functions implemented by the host.
 35 |             mod ffi {
 36 |                 extern "C" {
 37 |                     pub fn stateroom_send(message_ptr: *const u8, message_len: u32);
 38 |                 }
 39 |             }
 40 | 
 41 |             // Instance-global stateroom service.
 42 |             static mut SERVER_STATE: Option<stateroom_wasm::WrappedStateroomService<#name>> = None;
 43 | 
 44 |             #[no_mangle]
 45 |             pub static STATEROOM_API_VERSION: i32 = 1;
 46 | 
 47 |             #[no_mangle]
 48 |             pub static STATEROOM_API_PROTOCOL: i32 = 0;
 49 | 
 50 |             #[no_mangle]
 51 |             extern "C" fn stateroom_recv(message_ptr: *const u8, message_len: u32) {
 52 |                 let state = unsafe {
 53 |                     match SERVER_STATE.as_mut() {
 54 |                         Some(s) => s,
 55 |                         None => {
 56 |                             let s = stateroom_wasm::WrappedStateroomService::new(#name::default(), ffi::stateroom_send);
 57 |                             SERVER_STATE.replace(s);
 58 |                             SERVER_STATE.as_mut().unwrap()
 59 |                         }
 60 |                     }
 61 |                 };
 62 |                 state.recv(message_ptr, message_len);
 63 |             }
 64 | 
 65 |             #[no_mangle]
 66 |             pub unsafe extern "C" fn stateroom_malloc(size: u32) -> *mut u8 {
 67 |                 if size == 0 {
 68 |                     return core::ptr::null_mut();
 69 |                 }
 70 |                 let layout = core::alloc::Layout::from_size_align_unchecked(size as usize, 0);
 71 |                 alloc::alloc::alloc(layout)
 72 |             }
 73 | 
 74 |             #[no_mangle]
 75 |             pub unsafe extern "C" fn stateroom_free(ptr: *mut u8, size: u32) {
 76 |                 if size == 0 {
 77 |                     return;
 78 |                 }
 79 |                 let layout = core::alloc::Layout::from_size_align_unchecked(size as usize, 0);
 80 |                 alloc::alloc::dealloc(ptr, layout);
 81 |             }
 82 |         }
 83 |     }
 84 | }
 85 | 
 86 | /// Exposes a `stateroom_wasm::StateroomService`-implementing trait as a WebAssembly module.
 87 | #[proc_macro_attribute]
 88 | pub fn stateroom_wasm(_attr: TokenStream, item: TokenStream) -> TokenStream {
 89 |     #[allow(clippy::needless_borrow)]
 90 |     stateroom_wasm_impl(&item.into()).into()
 91 | }
 92 | 
 93 | #[cfg(test)]
 94 | mod test {
 95 |     use super::get_name;
 96 |     use quote::quote;
 97 | 
 98 |     #[test]
 99 |     fn test_parse_name() {
100 |         assert_eq!(
101 |             "MyStruct",
102 |             get_name(&quote! {
103 |                 struct MyStruct {}
104 |             })
105 |             .unwrap()
106 |             .to_string()
107 |         );
108 | 
109 |         assert_eq!(
110 |             "AnotherStruct",
111 |             get_name(&quote! {
112 |                 struct AnotherStruct;
113 |             })
114 |             .unwrap()
115 |             .to_string()
116 |         );
117 | 
118 |         assert_eq!(
119 |             "ATupleStruct",
120 |             get_name(&quote! {
121 |                 struct ATupleStruct(u32, u32, u32);
122 |             })
123 |             .unwrap()
124 |             .to_string()
125 |         );
126 | 
127 |         assert_eq!(
128 |             "AnEnum",
129 |             get_name(&quote! {
130 |                 enum AnEnum {
131 |                     Option1,
132 |                     Option2(u32),
133 |                 }
134 |             })
135 |             .unwrap()
136 |             .to_string()
137 |         );
138 | 
139 |         assert_eq!(
140 |             "ATypeDecl",
141 |             get_name(&quote! {
142 |                 type ATypeDecl = u32;
143 |             })
144 |             .unwrap()
145 |             .to_string()
146 |         );
147 | 
148 |         assert!(get_name(&quote! {
149 |             impl Foo {}
150 |         })
151 |         .is_none());
152 |     }
153 | }
154 | 


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/stateroom/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "stateroom"
 3 | version = "0.4.4"
 4 | authors = ["Paul Butler <paulgb@gmail.com>"]
 5 | edition = "2018"
 6 | readme = "../README.md"
 7 | repository = "https://github.com/drifting-in-space/stateroom"
 8 | license = "MIT OR Apache-2.0"
 9 | keywords = ["websocket"]
10 | description = "A lightweight framework for building WebSocket services."
11 | 
12 | [dependencies]
13 | serde = { version = "1.0.133", features = ["derive"], optional=true }
14 | 
15 | [features]
16 | default = []
17 | 


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/stateroom/src/client_id.rs:
--------------------------------------------------------------------------------
 1 | #[cfg(feature = "serde")]
 2 | use serde::{Deserialize, Serialize};
 3 | 
 4 | #[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Hash, Ord)]
 5 | #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 6 | 
 7 | pub struct ClientId(pub u32);
 8 | 
 9 | impl From<ClientId> for u32 {
10 |     fn from(c: ClientId) -> Self {
11 |         c.0
12 |     }
13 | }
14 | 
15 | impl From<u32> for ClientId {
16 |     fn from(u: u32) -> Self {
17 |         ClientId(u)
18 |     }
19 | }
20 | 


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/stateroom/src/lib.rs:
--------------------------------------------------------------------------------
  1 | //! Stateroom is a minimalist framework for developing stateful
  2 | //! [WebSocket](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API) applications.
  3 | //!
  4 | //! Stateroom apps implement the [SimpleStateroomService] trait, which provides a way for the
  5 | //! app to hook into events when clients connect, disconnect, and send messages. Additionally,
  6 | //! Stateroom provides a simple mechanism for invoking events in the future with a timer.
  7 | //!
  8 | //! A simple chat server looks like this:
  9 | //!
 10 | //! ```
 11 | //! use stateroom::*;
 12 | //! use std::collections::HashMap;
 13 | //!
 14 | //! #[derive(Default)]
 15 | //! struct ChatServer {
 16 | //!     /// The server's only state is a mapping of client ID to username.
 17 | //!     client_to_nickname: HashMap<ClientId, String>,
 18 | //! }
 19 | //!
 20 | //! impl StateroomService for ChatServer {
 21 | //!     /// This is called when a user connects.
 22 | //!     fn connect(&mut self, client: ClientId, ctx: &impl StateroomContext) {
 23 | //!         let username = format!("client{}", u32::from(client));
 24 | //!
 25 | //!         // Send a welcome message.
 26 | //!         ctx.send_message(client,
 27 | //!             format!("Welcome to the chat! Your name is {}. \
 28 | //!                      Send /nick <username> to change it.",
 29 | //!                      &username));
 30 | //!
 31 | //!         // Alert all other connected users to the new user.
 32 | //!         ctx.send_message(MessageRecipient::Broadcast,
 33 | //!             format!("{} has joined the chat", &username));
 34 | //!     }
 35 | //!
 36 | //!     /// This is called when a user disconnects.
 37 | //!     fn disconnect(&mut self, client: ClientId, ctx: &impl StateroomContext) {
 38 | //!         let username = self.client_to_nickname.remove(&client).unwrap();
 39 | //!
 40 | //!         // Alert all remaining users that a user has left.
 41 | //!         ctx.send_message(MessageRecipient::Broadcast,
 42 | //!            format!("{} has left the chat", &username));
 43 | //!     }
 44 | //!
 45 | //!     /// This is called when a user sends a message.
 46 | //!     fn message(&mut self, client: ClientId, message: MessagePayload, ctx: &impl StateroomContext) {
 47 | //!         let Some(message) = message.text() else {
 48 | //!             // Ignore binary messages.
 49 | //!             return;
 50 | //!         };
 51 | //!
 52 | //!         if let Some(new_nick) = message.strip_prefix("/nick ") {
 53 | //!             // This message is a /nick command, so process accordingly.
 54 | //!             let old_nick = self.client_to_nickname.insert(client, new_nick.to_string()).unwrap();
 55 | //!             ctx.send_message(MessageRecipient::Broadcast,
 56 | //!                format!("{} is now known as {}", old_nick, new_nick));
 57 | //!         } else {
 58 | //!             // Broadcast the message to all connected users, prefixed by the username.
 59 | //!             let username = self.client_to_nickname.get(&client).unwrap();
 60 | //!             ctx.send_message(MessageRecipient::Broadcast,
 61 | //!                format!("{}: {}", username, message));
 62 | //!         }
 63 | //!     }
 64 | //! }
 65 | 
 66 | use std::{convert::Infallible, sync::Arc};
 67 | 
 68 | pub use client_id::ClientId;
 69 | pub use message_recipient::MessageRecipient;
 70 | pub use messages::{MessageFromProcess, MessagePayload, MessageToProcess};
 71 | 
 72 | mod client_id;
 73 | mod message_recipient;
 74 | mod messages;
 75 | 
 76 | /// Provides an interface for a [StateroomService] instance to send messages back to its host environment.
 77 | pub trait StateroomContext: Send + Sync + Clone + 'static {
 78 |     /// Sends a message to a currently connected user, or broadcast a message to all users.
 79 |     ///
 80 |     /// Recipient can be a `u32` representing an individual user to send a message to, or
 81 |     /// `MessageRecipient::Broadcast` to broadcast a message to all connected users.
 82 |     /// The message is a string which is sent verbatim to the user(s) indicated.
 83 |     fn send_message(
 84 |         &self,
 85 |         recipient: impl Into<MessageRecipient>,
 86 |         message: impl Into<MessagePayload>,
 87 |     );
 88 | 
 89 |     /// Sets a timer to wake up the service in the given number of milliseconds by invoking `timer()`.
 90 |     ///
 91 |     /// Each instance of a service can only have one (or zero) timer outstanding at any time; if this
 92 |     /// is called before an existing timer expires, the previous timer is replaced. This provides a
 93 |     /// very basic primitive that more complex timer behavior can be built on, using state and logic
 94 |     /// stored in your service. For example, you could implement multiple concurrent timers using a
 95 |     /// priority queue and ensuring that the environment timer always reflects the head of the queue.
 96 |     fn set_timer(&self, ms_delay: u32);
 97 | }
 98 | 
 99 | /// A simplified interface for creating a [StateroomService] that can be exposed as a WebAssembly module.
100 | ///
101 | /// See module documentation for usage examples.
102 | #[allow(unused_variables)]
103 | pub trait StateroomService: Send + Sync + 'static {
104 |     /// Called when the service is created, before any client has had a chance to connect.
105 |     fn init(&mut self, context: &impl StateroomContext) {}
106 | 
107 |     /// Called each time a client connects to the service.
108 |     fn connect(&mut self, client: ClientId, context: &impl StateroomContext) {}
109 | 
110 |     /// Called each time a client disconnects from the service, unless that disconnection
111 |     /// will cause the service to be destroyed.
112 |     fn disconnect(&mut self, client: ClientId, context: &impl StateroomContext) {}
113 | 
114 |     /// Called each time a client sends a text message to the service.
115 |     fn message(
116 |         &mut self,
117 |         client: ClientId,
118 |         message: MessagePayload,
119 |         context: &impl StateroomContext,
120 |     ) {
121 |     }
122 | 
123 |     /// Called when [StateroomContext::set_timer] has been called on this service's context,
124 |     /// after the provided duration.
125 |     fn timer(&mut self, context: &impl StateroomContext) {}
126 | }
127 | 
128 | pub trait StateroomServiceFactory: Send + Sync + 'static {
129 |     /// The type of [StateroomService] that the object implementing this trait builds.
130 |     type Service: StateroomService;
131 |     type Error: std::fmt::Debug;
132 | 
133 |     /// Non-destructively build a [StateroomService] from `self`.
134 |     fn build(
135 |         &self,
136 |         room_id: &str,
137 |         context: Arc<impl StateroomContext>,
138 |     ) -> Result<Self::Service, Self::Error>;
139 | }
140 | 
141 | #[derive(Default)]
142 | pub struct DefaultStateroomFactory<T: StateroomService + Default> {
143 |     _marker: std::marker::PhantomData<T>,
144 | }
145 | 
146 | impl<T: StateroomService + Default> StateroomServiceFactory for DefaultStateroomFactory<T> {
147 |     type Service = T;
148 |     type Error = Infallible;
149 | 
150 |     fn build(&self, _: &str, _: Arc<impl StateroomContext>) -> Result<Self::Service, Self::Error> {
151 |         Ok(T::default())
152 |     }
153 | }
154 | 


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/stateroom/src/message_recipient.rs:
--------------------------------------------------------------------------------
 1 | use crate::ClientId;
 2 | #[cfg(feature = "serde")]
 3 | use serde::{Deserialize, Serialize};
 4 | 
 5 | /// Represents the recipient(s) of a message.
 6 | ///
 7 | /// Messages may either be sent to a particular client by numeric id
 8 | /// (`MessageRecipient::Client(3)`), or be broadcast to all connected clients
 9 | /// (`MessageRecipient::Broadcast`).]
10 | #[derive(Debug, Clone, PartialEq)]
11 | #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
12 | 
13 | pub enum MessageRecipient {
14 |     Broadcast,
15 |     Client(ClientId),
16 |     EveryoneExcept(ClientId),
17 | }
18 | 
19 | impl MessageRecipient {
20 |     #[must_use]
21 |     pub fn encode_i32(&self) -> i32 {
22 |         match self {
23 |             Self::Broadcast => 0,
24 |             Self::Client(c) => c.0 as i32,
25 |             Self::EveryoneExcept(c) => -(c.0 as i32),
26 |         }
27 |     }
28 | 
29 |     #[must_use]
30 |     pub fn decode_i32(enc_client_id: i32) -> Self {
31 |         match enc_client_id {
32 |             0 => Self::Broadcast,
33 |             c if c > 0 => Self::Client((c as u32).into()),
34 |             c => Self::EveryoneExcept((-c as u32).into()),
35 |         }
36 |     }
37 | }
38 | 
39 | impl From<ClientId> for MessageRecipient {
40 |     fn from(c: ClientId) -> Self {
41 |         MessageRecipient::Client(c)
42 |     }
43 | }
44 | 
45 | #[cfg(test)]
46 | mod tests {
47 |     use crate::{ClientId, MessageRecipient};
48 | 
49 |     #[test]
50 |     fn test_decode() {
51 |         assert_eq!(MessageRecipient::Broadcast, MessageRecipient::decode_i32(0));
52 |         assert_eq!(
53 |             MessageRecipient::Client(3.into()),
54 |             MessageRecipient::decode_i32(3)
55 |         );
56 |         assert_eq!(
57 |             MessageRecipient::Client(9.into()),
58 |             ClientId::from(9u32).into()
59 |         );
60 | 
61 |         assert_eq!(0, MessageRecipient::Broadcast.encode_i32());
62 |         assert_eq!(443, MessageRecipient::Client(443.into()).encode_i32());
63 | 
64 |         assert_eq!(-4, MessageRecipient::EveryoneExcept(4.into()).encode_i32());
65 |         assert_eq!(
66 |             MessageRecipient::EveryoneExcept(119.into()),
67 |             MessageRecipient::decode_i32(-119)
68 |         );
69 | 
70 |         assert_eq!(
71 |             MessageRecipient::EveryoneExcept(1.into()),
72 |             MessageRecipient::decode_i32(-1)
73 |         );
74 |     }
75 | }
76 | 


--------------------------------------------------------------------------------
/stateroom/src/messages.rs:
--------------------------------------------------------------------------------
 1 | #[cfg(feature = "serde")]
 2 | use serde::{Deserialize, Serialize};
 3 | 
 4 | use crate::{ClientId, MessageRecipient};
 5 | 
 6 | #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 7 | #[derive(Debug)]
 8 | pub enum MessagePayload {
 9 |     Bytes(Vec<u8>),
10 |     Text(String),
11 | }
12 | 
13 | impl MessagePayload {
14 |     pub fn text(&self) -> Option<&str> {
15 |         match self {
16 |             MessagePayload::Text(s) => Some(s),
17 |             _ => None,
18 |         }
19 |     }
20 | 
21 |     pub fn bytes(&self) -> Option<&[u8]> {
22 |         match self {
23 |             MessagePayload::Bytes(b) => Some(b),
24 |             _ => None,
25 |         }
26 |     }
27 | }
28 | 
29 | impl From<String> for MessagePayload {
30 |     fn from(val: String) -> Self {
31 |         MessagePayload::Text(val)
32 |     }
33 | }
34 | 
35 | impl From<&str> for MessagePayload {
36 |     fn from(val: &str) -> Self {
37 |         MessagePayload::Text(val.to_string())
38 |     }
39 | }
40 | 
41 | impl From<Vec<u8>> for MessagePayload {
42 |     fn from(val: Vec<u8>) -> Self {
43 |         MessagePayload::Bytes(val)
44 |     }
45 | }
46 | 
47 | impl From<&[u8]> for MessagePayload {
48 |     fn from(val: &[u8]) -> Self {
49 |         MessagePayload::Bytes(val.to_vec())
50 |     }
51 | }
52 | 
53 | #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
54 | #[derive(Debug)]
55 | pub enum MessageToProcess {
56 |     Init,
57 |     Connect {
58 |         client: ClientId,
59 |     },
60 |     Disconnect {
61 |         client: ClientId,
62 |     },
63 |     Message {
64 |         sender: ClientId,
65 |         message: MessagePayload,
66 |     },
67 |     Timer,
68 | }
69 | 
70 | #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
71 | pub enum MessageFromProcess {
72 |     Message {
73 |         recipient: MessageRecipient,
74 |         message: MessagePayload,
75 |     },
76 |     SetTimer {
77 |         ms_delay: u32,
78 |     },
79 | }
80 | 


--------------------------------------------------------------------------------