├── .dockerignore
├── .github
    └── workflows
    │   ├── actionlint.yml
    │   ├── ci.yml
    │   ├── release.yml
    │   └── review.yml
├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── Dockerfile
├── LICENSE
├── README.md
├── assets
    ├── banner.html
    ├── head.html
    ├── rtl_head.html
    ├── select_head.html
    └── svg_head.html
├── renovate.json
├── rust-toolchain
└── src
    ├── connection_counter.rs
    ├── gif_banner.rs
    ├── html.rs
    ├── main.rs
    ├── model.rs
    ├── mygif.rs
    ├── rtl.rs
    ├── select.rs
    └── svg.rs


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


--------------------------------------------------------------------------------
/.github/workflows/actionlint.yml:
--------------------------------------------------------------------------------
 1 | name: actionlint
 2 | on:
 3 |   pull_request:
 4 |     paths:
 5 |       - '.github/workflows/**'
 6 | 
 7 | jobs:
 8 |   actionlint:
 9 |     name: runner / actionlint
10 |     runs-on: ubuntu-24.04
11 |     steps:
12 |       - uses: actions/checkout@v4.2.2
13 | 
14 |       - name: actionlint
15 |         uses: reviewdog/action-actionlint@v1.65.2
16 |         with:
17 |           github_token: ${{ secrets.GITHUB_TOKEN }}
18 |           reporter: github-pr-review
19 |           filter_mode: nofilter
20 |           fail_on_error: true
21 | 


--------------------------------------------------------------------------------
/.github/workflows/ci.yml:
--------------------------------------------------------------------------------
  1 | name: CI
  2 | 
  3 | on:
  4 |   pull_request:
  5 |     paths:
  6 |       - 'Dockerfile'
  7 |       - 'src/**'
  8 |       - 'Cargo.toml'
  9 |       - 'Cargo.lock'
 10 |       - '.github/workflows/ci.yml'
 11 |   push:
 12 |     branches:
 13 |       - 'master'
 14 |     tags:
 15 |       - v*
 16 | 
 17 | env:
 18 |   CARGO_INCREMENTAL: 0
 19 |   RUST_CACHE_VERSION: v1
 20 | 
 21 | jobs:
 22 |   rust:
 23 |     permissions:
 24 |       packages: write
 25 |       checks: write
 26 |       contents: read
 27 |       deployments: write
 28 | 
 29 |     runs-on: ubuntu-24.04
 30 | 
 31 |     steps:
 32 |       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 33 | 
 34 |       - name: Get Rust toolchain
 35 |         id: toolchain
 36 |         run: |
 37 |           awk -F'[ ="]+' '$1 == "channel" { print "toolchain=" $2 }' rust-toolchain >> "$GITHUB_OUTPUT"
 38 | 
 39 |       - name: install clippy
 40 |         uses: dtolnay/rust-toolchain@stable
 41 |         with:
 42 |           toolchain: ${{ steps.toolchain.outputs.toolchain }}
 43 |           components: clippy
 44 | 
 45 |       - name: cache dependencies
 46 |         uses: Swatinem/rust-cache@v2.7.8
 47 |         with:
 48 |           prefix-key: ${{ env.RUST_CACHE_VERSION }}-rust
 49 | 
 50 |       - name: clippy check
 51 |         uses: sksat/action-clippy@v1.1.1
 52 |         with:
 53 |           reporter: github-check
 54 | 
 55 |       - name: unit test
 56 |         run: |
 57 |           cargo test --no-run --locked
 58 |           cargo test
 59 | 
 60 |       - name: release build
 61 |         run: cargo build --release
 62 | 
 63 |       - uses: docker/setup-buildx-action@v3.10.0
 64 | 
 65 |       - uses: docker/login-action@v3.4.0
 66 |         with:
 67 |           registry: ghcr.io
 68 |           username: ${{ github.repository_owner }}
 69 |           password: ${{ secrets.GITHUB_TOKEN }}
 70 | 
 71 |       - name: Create tagname
 72 |         id: tagname
 73 |         run: |
 74 |           VERSION="$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')"
 75 |           # 2193: ${{ github.ref }} will replaced by GitHub Actions
 76 |           # shellcheck disable=SC2193
 77 |           [[ "${{ github.ref }}" == refs/tags/* ]] && VERSION="${VERSION/v/}"
 78 |           [[ "$VERSION" == "master" ]] && VERSION=latest
 79 |           # shellcheck disable=SC2193
 80 |           [[ "${{ github.ref }}" == refs/pull/* ]] && VERSION=dontpush
 81 |           echo "$VERSION"
 82 |           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
 83 | 
 84 |       - name: Build and Push
 85 |         uses: docker/build-push-action@v6.18.0
 86 |         if: "! startsWith(github.ref, 'refs/pull/')"
 87 |         with:
 88 |           context: .
 89 |           platforms: linux/amd64
 90 |           push: true
 91 |           cache-from: type=gha
 92 |           cache-to: type=gha,mode=max
 93 |           tags: |
 94 |             ghcr.io/yanorei32/http-clock:${{ steps.tagname.outputs.version }}
 95 | 
 96 |       - name: Build and Push
 97 |         uses: docker/build-push-action@v6.18.0
 98 |         if: "startsWith(github.ref, 'refs/pull/')"
 99 |         with:
100 |           context: .
101 |           platforms: linux/amd64
102 |           push: false
103 |           cache-from: type=gha
104 |           cache-to: type=gha,mode=max
105 |           tags: |
106 |             ghcr.io/yanorei32/http-clock:${{ steps.tagname.outputs.version }}
107 | 


--------------------------------------------------------------------------------
/.github/workflows/release.yml:
--------------------------------------------------------------------------------
  1 | on:
  2 |   push:
  3 |     branches:
  4 |       - "master"
  5 |     tags:
  6 |       - "v*"
  7 | 
  8 | env:
  9 |   CARGO_INCREMENTAL: 0
 10 | 
 11 | jobs:
 12 |   release:
 13 |     strategy:
 14 |       matrix:
 15 |         include:
 16 |           - target: x86_64-unknown-linux-gnu
 17 |             file: http-clock
 18 |             output: http-clock-linux.zip
 19 |           - target: x86_64-pc-windows-gnu
 20 |             file: http-clock.exe
 21 |             output: http-clock-windows.zip
 22 |     name: release
 23 |     runs-on: ubuntu-24.04
 24 |     steps:
 25 |       - uses: actions/checkout@v4.2.2
 26 | 
 27 |       - if: ${{ matrix.target == 'x86_64-pc-windows-gnu' }}
 28 |         run: |
 29 |           sudo apt-get update -y
 30 |           sudo apt-get install -y gcc-mingw-w64-x86-64
 31 | 
 32 |       - name: Get Rust toolchain
 33 |         id: toolchain
 34 |         run: |
 35 |           awk -F'[ ="]+' '$1 == "channel" { print "toolchain=" $2 }' rust-toolchain >> "$GITHUB_OUTPUT"
 36 | 
 37 |       - name: install clippy
 38 |         uses: dtolnay/rust-toolchain@stable
 39 |         with:
 40 |           components: clippy
 41 |           toolchain: ${{ steps.toolchain.outputs.toolchain }}
 42 |           targets: x86_64-pc-windows-gnu
 43 | 
 44 |       - name: cache dependencies
 45 |         uses: Swatinem/rust-cache@v2.7.8
 46 | 
 47 |       - name: clippy check
 48 |         uses: sksat/action-clippy@v1.1.1
 49 |         with:
 50 |           reporter: github-check
 51 | 
 52 |       - name: install cargo-license
 53 |         run: cargo install cargo-license
 54 | 
 55 |       - name: unit test
 56 |         run: |
 57 |           cargo test --no-run --locked
 58 |           cargo test
 59 | 
 60 |       - name: build
 61 |         env:
 62 |           TARGET: ${{ matrix.target }}
 63 |         run:
 64 |           cargo build --release --target $TARGET
 65 | 
 66 |       - env:
 67 |           TARGET: ${{ matrix.target }}
 68 |           FILE: ${{ matrix.file }}
 69 |           OUTPUT: ${{ matrix.output }}
 70 |         run: |
 71 |           mkdir http-clock
 72 |           cargo license \
 73 |             --authors \
 74 |             --do-not-bundle \
 75 |             --avoid-dev-deps \
 76 |             --avoid-build-deps \
 77 |             --filter-platform $TARGET \
 78 |               > http-clock/CREDITS
 79 |           VERSION_NAME=${GITHUB_REF##*/}
 80 |           if [[ $VERSION_NAME == "master" ]]; then
 81 |               VERSION_NAME=$(git rev-parse --short HEAD)
 82 |           elif [[ ${VERSION_NAME:0:1} == "v" ]]; then
 83 |               VERSION_NAME=${VERSION_NAME:1}
 84 |           fi
 85 |           echo "$VERSION_NAME" > http-clock/VERSION.txt
 86 |           cp LICENSE README.md http-clock/
 87 |           cp target/$TARGET/release/$FILE http-clock/
 88 |           zip -r $OUTPUT http-clock
 89 | 
 90 |       - name: pre-release
 91 |         uses: softprops/action-gh-release@v2.2.2
 92 |         if: "! startsWith(github.ref, 'refs/tags/')"
 93 |         with:
 94 |           tag_name: nightly-${{ github.sha }}
 95 |           prerelease: true
 96 |           fail_on_unmatched_files: true
 97 |           files: |
 98 |             ${{ matrix.output }}
 99 | 
100 |       - name: tagged-release
101 |         uses: softprops/action-gh-release@v2.2.2
102 |         if: startsWith(github.ref, 'refs/tags/')
103 |         with:
104 |           fail_on_unmatched_files: true
105 |           files: |
106 |             ${{ matrix.output }}
107 | 


--------------------------------------------------------------------------------
/.github/workflows/review.yml:
--------------------------------------------------------------------------------
 1 | name: Review
 2 | 
 3 | on:
 4 |   pull_request:
 5 |     paths:
 6 |       - 'src/**'
 7 |       - 'Cargo.toml'
 8 |       - 'Cargo.lock'
 9 |       - '.github/workflows/review.yml'
10 | 
11 | 
12 | env:
13 |   CARGO_INCREMENTAL: 0
14 | 
15 | jobs:
16 |   rust:
17 |     runs-on: ubuntu-24.04
18 |     steps:
19 |       - uses: actions/checkout@v4.2.2
20 | 
21 |       - name: Get Rust toolchain
22 |         id: toolchain
23 |         run: |
24 |           awk -F'[ ="]+' '$1 == "channel" { print "toolchain=" $2 }' rust-toolchain >> "$GITHUB_OUTPUT"
25 | 
26 |       - name: install clippy
27 |         uses: dtolnay/rust-toolchain@stable
28 |         with:
29 |           toolchain: ${{ steps.toolchain.outputs.toolchain }}
30 |           components: clippy
31 | 
32 |       - name: cache dependencies
33 |         uses: Swatinem/rust-cache@v2.7.8
34 | 
35 |       - name: clippy check
36 |         uses: sksat/action-clippy@v1.1.1
37 |         with:
38 |           reporter: github-pr-review
39 | 
40 |       - name: unit test
41 |         run: |
42 |           cargo test --no-run --locked
43 |           cargo test
44 | 


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


--------------------------------------------------------------------------------
/Cargo.lock:
--------------------------------------------------------------------------------
   1 | # This file is automatically @generated by Cargo.
   2 | # It is not intended for manual editing.
   3 | version = 4
   4 | 
   5 | [[package]]
   6 | name = "addr2line"
   7 | version = "0.24.2"
   8 | source = "registry+https://github.com/rust-lang/crates.io-index"
   9 | checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1"
  10 | dependencies = [
  11 |  "gimli",
  12 | ]
  13 | 
  14 | [[package]]
  15 | name = "adler2"
  16 | version = "2.0.0"
  17 | source = "registry+https://github.com/rust-lang/crates.io-index"
  18 | checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
  19 | 
  20 | [[package]]
  21 | name = "aho-corasick"
  22 | version = "1.1.3"
  23 | source = "registry+https://github.com/rust-lang/crates.io-index"
  24 | checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
  25 | dependencies = [
  26 |  "memchr",
  27 | ]
  28 | 
  29 | [[package]]
  30 | name = "android-tzdata"
  31 | version = "0.1.1"
  32 | source = "registry+https://github.com/rust-lang/crates.io-index"
  33 | checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
  34 | 
  35 | [[package]]
  36 | name = "android_system_properties"
  37 | version = "0.1.5"
  38 | source = "registry+https://github.com/rust-lang/crates.io-index"
  39 | checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
  40 | dependencies = [
  41 |  "libc",
  42 | ]
  43 | 
  44 | [[package]]
  45 | name = "anstream"
  46 | version = "0.6.18"
  47 | source = "registry+https://github.com/rust-lang/crates.io-index"
  48 | checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
  49 | dependencies = [
  50 |  "anstyle",
  51 |  "anstyle-parse",
  52 |  "anstyle-query",
  53 |  "anstyle-wincon",
  54 |  "colorchoice",
  55 |  "is_terminal_polyfill",
  56 |  "utf8parse",
  57 | ]
  58 | 
  59 | [[package]]
  60 | name = "anstyle"
  61 | version = "1.0.10"
  62 | source = "registry+https://github.com/rust-lang/crates.io-index"
  63 | checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
  64 | 
  65 | [[package]]
  66 | name = "anstyle-parse"
  67 | version = "0.2.6"
  68 | source = "registry+https://github.com/rust-lang/crates.io-index"
  69 | checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
  70 | dependencies = [
  71 |  "utf8parse",
  72 | ]
  73 | 
  74 | [[package]]
  75 | name = "anstyle-query"
  76 | version = "1.1.2"
  77 | source = "registry+https://github.com/rust-lang/crates.io-index"
  78 | checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
  79 | dependencies = [
  80 |  "windows-sys 0.59.0",
  81 | ]
  82 | 
  83 | [[package]]
  84 | name = "anstyle-wincon"
  85 | version = "3.0.7"
  86 | source = "registry+https://github.com/rust-lang/crates.io-index"
  87 | checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
  88 | dependencies = [
  89 |  "anstyle",
  90 |  "once_cell",
  91 |  "windows-sys 0.59.0",
  92 | ]
  93 | 
  94 | [[package]]
  95 | name = "array-init"
  96 | version = "2.1.0"
  97 | source = "registry+https://github.com/rust-lang/crates.io-index"
  98 | checksum = "3d62b7694a562cdf5a74227903507c56ab2cc8bdd1f781ed5cb4cf9c9f810bfc"
  99 | 
 100 | [[package]]
 101 | name = "async-stream"
 102 | version = "0.3.6"
 103 | source = "registry+https://github.com/rust-lang/crates.io-index"
 104 | checksum = "0b5a71a6f37880a80d1d7f19efd781e4b5de42c88f0722cc13bcb6cc2cfe8476"
 105 | dependencies = [
 106 |  "async-stream-impl",
 107 |  "futures-core",
 108 |  "pin-project-lite",
 109 | ]
 110 | 
 111 | [[package]]
 112 | name = "async-stream-impl"
 113 | version = "0.3.6"
 114 | source = "registry+https://github.com/rust-lang/crates.io-index"
 115 | checksum = "c7c24de15d275a1ecfd47a380fb4d5ec9bfe0933f309ed5e705b775596a3574d"
 116 | dependencies = [
 117 |  "proc-macro2",
 118 |  "quote",
 119 |  "syn",
 120 | ]
 121 | 
 122 | [[package]]
 123 | name = "autocfg"
 124 | version = "1.4.0"
 125 | source = "registry+https://github.com/rust-lang/crates.io-index"
 126 | checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
 127 | 
 128 | [[package]]
 129 | name = "axum"
 130 | version = "0.8.4"
 131 | source = "registry+https://github.com/rust-lang/crates.io-index"
 132 | checksum = "021e862c184ae977658b36c4500f7feac3221ca5da43e3f25bd04ab6c79a29b5"
 133 | dependencies = [
 134 |  "axum-core",
 135 |  "bytes",
 136 |  "form_urlencoded",
 137 |  "futures-util",
 138 |  "http",
 139 |  "http-body",
 140 |  "http-body-util",
 141 |  "hyper",
 142 |  "hyper-util",
 143 |  "itoa",
 144 |  "matchit",
 145 |  "memchr",
 146 |  "mime",
 147 |  "percent-encoding",
 148 |  "pin-project-lite",
 149 |  "rustversion",
 150 |  "serde",
 151 |  "serde_json",
 152 |  "serde_path_to_error",
 153 |  "serde_urlencoded",
 154 |  "sync_wrapper",
 155 |  "tokio",
 156 |  "tower",
 157 |  "tower-layer",
 158 |  "tower-service",
 159 |  "tracing",
 160 | ]
 161 | 
 162 | [[package]]
 163 | name = "axum-core"
 164 | version = "0.5.2"
 165 | source = "registry+https://github.com/rust-lang/crates.io-index"
 166 | checksum = "68464cd0412f486726fb3373129ef5d2993f90c34bc2bc1c1e9943b2f4fc7ca6"
 167 | dependencies = [
 168 |  "bytes",
 169 |  "futures-core",
 170 |  "http",
 171 |  "http-body",
 172 |  "http-body-util",
 173 |  "mime",
 174 |  "pin-project-lite",
 175 |  "rustversion",
 176 |  "sync_wrapper",
 177 |  "tower-layer",
 178 |  "tower-service",
 179 |  "tracing",
 180 | ]
 181 | 
 182 | [[package]]
 183 | name = "backtrace"
 184 | version = "0.3.74"
 185 | source = "registry+https://github.com/rust-lang/crates.io-index"
 186 | checksum = "8d82cb332cdfaed17ae235a638438ac4d4839913cc2af585c3c6746e8f8bee1a"
 187 | dependencies = [
 188 |  "addr2line",
 189 |  "cfg-if",
 190 |  "libc",
 191 |  "miniz_oxide",
 192 |  "object",
 193 |  "rustc-demangle",
 194 |  "windows-targets",
 195 | ]
 196 | 
 197 | [[package]]
 198 | name = "binrw"
 199 | version = "0.15.0"
 200 | source = "registry+https://github.com/rust-lang/crates.io-index"
 201 | checksum = "81419ff39e6ed10a92a7f125290859776ced35d9a08a665ae40b23e7ca702f30"
 202 | dependencies = [
 203 |  "array-init",
 204 |  "binrw_derive",
 205 |  "bytemuck",
 206 | ]
 207 | 
 208 | [[package]]
 209 | name = "binrw_derive"
 210 | version = "0.15.0"
 211 | source = "registry+https://github.com/rust-lang/crates.io-index"
 212 | checksum = "376404e55ec40d0d6f8b4b7df3f87b87954bd987f0cf9a7207ea3b6ea5c9add4"
 213 | dependencies = [
 214 |  "either",
 215 |  "owo-colors",
 216 |  "proc-macro2",
 217 |  "quote",
 218 |  "syn",
 219 | ]
 220 | 
 221 | [[package]]
 222 | name = "bitfield-struct"
 223 | version = "0.11.0"
 224 | source = "registry+https://github.com/rust-lang/crates.io-index"
 225 | checksum = "d3ca019570363e800b05ad4fd890734f28ac7b72f563ad8a35079efb793616f8"
 226 | dependencies = [
 227 |  "proc-macro2",
 228 |  "quote",
 229 |  "syn",
 230 | ]
 231 | 
 232 | [[package]]
 233 | name = "bumpalo"
 234 | version = "3.17.0"
 235 | source = "registry+https://github.com/rust-lang/crates.io-index"
 236 | checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
 237 | 
 238 | [[package]]
 239 | name = "bytemuck"
 240 | version = "1.22.0"
 241 | source = "registry+https://github.com/rust-lang/crates.io-index"
 242 | checksum = "b6b1fc10dbac614ebc03540c9dbd60e83887fda27794998c6528f1782047d540"
 243 | 
 244 | [[package]]
 245 | name = "bytes"
 246 | version = "1.10.1"
 247 | source = "registry+https://github.com/rust-lang/crates.io-index"
 248 | checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 249 | 
 250 | [[package]]
 251 | name = "cc"
 252 | version = "1.2.17"
 253 | source = "registry+https://github.com/rust-lang/crates.io-index"
 254 | checksum = "1fcb57c740ae1daf453ae85f16e37396f672b039e00d9d866e07ddb24e328e3a"
 255 | dependencies = [
 256 |  "shlex",
 257 | ]
 258 | 
 259 | [[package]]
 260 | name = "cfg-if"
 261 | version = "1.0.0"
 262 | source = "registry+https://github.com/rust-lang/crates.io-index"
 263 | checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 264 | 
 265 | [[package]]
 266 | name = "chrono"
 267 | version = "0.4.41"
 268 | source = "registry+https://github.com/rust-lang/crates.io-index"
 269 | checksum = "c469d952047f47f91b68d1cba3f10d63c11d73e4636f24f08daf0278abf01c4d"
 270 | dependencies = [
 271 |  "android-tzdata",
 272 |  "iana-time-zone",
 273 |  "js-sys",
 274 |  "num-traits",
 275 |  "wasm-bindgen",
 276 |  "windows-link",
 277 | ]
 278 | 
 279 | [[package]]
 280 | name = "chrono-tz"
 281 | version = "0.10.3"
 282 | source = "registry+https://github.com/rust-lang/crates.io-index"
 283 | checksum = "efdce149c370f133a071ca8ef6ea340b7b88748ab0810097a9e2976eaa34b4f3"
 284 | dependencies = [
 285 |  "chrono",
 286 |  "chrono-tz-build",
 287 |  "phf",
 288 | ]
 289 | 
 290 | [[package]]
 291 | name = "chrono-tz-build"
 292 | version = "0.4.1"
 293 | source = "registry+https://github.com/rust-lang/crates.io-index"
 294 | checksum = "8f10f8c9340e31fc120ff885fcdb54a0b48e474bbd77cab557f0c30a3e569402"
 295 | dependencies = [
 296 |  "parse-zoneinfo",
 297 |  "phf_codegen",
 298 | ]
 299 | 
 300 | [[package]]
 301 | name = "clap"
 302 | version = "4.5.39"
 303 | source = "registry+https://github.com/rust-lang/crates.io-index"
 304 | checksum = "fd60e63e9be68e5fb56422e397cf9baddded06dae1d2e523401542383bc72a9f"
 305 | dependencies = [
 306 |  "clap_builder",
 307 |  "clap_derive",
 308 | ]
 309 | 
 310 | [[package]]
 311 | name = "clap_builder"
 312 | version = "4.5.39"
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1351 | name = "windows_i686_msvc"
1352 | version = "0.52.6"
1353 | source = "registry+https://github.com/rust-lang/crates.io-index"
1354 | checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
1355 | 
1356 | [[package]]
1357 | name = "windows_x86_64_gnu"
1358 | version = "0.52.6"
1359 | source = "registry+https://github.com/rust-lang/crates.io-index"
1360 | checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
1361 | 
1362 | [[package]]
1363 | name = "windows_x86_64_gnullvm"
1364 | version = "0.52.6"
1365 | source = "registry+https://github.com/rust-lang/crates.io-index"
1366 | checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
1367 | 
1368 | [[package]]
1369 | name = "windows_x86_64_msvc"
1370 | version = "0.52.6"
1371 | source = "registry+https://github.com/rust-lang/crates.io-index"
1372 | checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
1373 | 


--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "http-clock"
 3 | version = "0.6.1"
 4 | edition = "2021"
 5 | 
 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 7 | 
 8 | [dependencies]
 9 | async-stream = "0.3.5"
10 | axum = "0.8.0"
11 | binrw = "0.15.0"
12 | bitfield-struct = "0.11.0"
13 | bytes = "1.10.1"
14 | chrono = "0.4.38"
15 | chrono-tz = "0.10.0"
16 | clap = { version = "4.5.7", features = ["derive", "env"] }
17 | futures = "0.3.30"
18 | itertools = "0.14.0"
19 | lzw = "0.10.0"
20 | once_cell = "1.21.3"
21 | tokio = { version = "1.37.0", features = ["rt-multi-thread", "macros", "net", "time"] }
22 | tracing = "0.1.40"
23 | tracing-subscriber = "0.3.18"
24 | 


--------------------------------------------------------------------------------
/Dockerfile:
--------------------------------------------------------------------------------
 1 | FROM rust:1.87.0-bookworm as build-env
 2 | LABEL maintainer="yanorei32"
 3 | 
 4 | SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 5 | 
 6 | WORKDIR /usr/src
 7 | RUN cargo new http-clock
 8 | COPY LICENSE Cargo.toml Cargo.lock /usr/src/http-clock/
 9 | WORKDIR /usr/src/http-clock
10 | ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
11 | RUN	cargo install cargo-license && cargo license \
12 | 	--authors \
13 | 	--do-not-bundle \
14 | 	--avoid-dev-deps \
15 | 	--avoid-build-deps \
16 | 	--filter-platform "$(rustc -vV | sed -n 's|host: ||p')" \
17 | 	> CREDITS
18 | 
19 | RUN cargo build --release
20 | COPY src/ /usr/src/http-clock/src/
21 | COPY assets/ /usr/src/http-clock/assets/
22 | RUN touch  assets/* src/* && cargo build --release
23 | 
24 | FROM debian:bookworm-slim@sha256:90522eeb7e5923ee2b871c639059537b30521272f10ca86fdbbbb2b75a8c40cd
25 | 
26 | WORKDIR /
27 | 
28 | COPY --chown=root:root --from=build-env \
29 | 	/usr/src/http-clock/CREDITS \
30 | 	/usr/src/http-clock/LICENSE \
31 | 	/usr/share/licenses/http-clock/
32 | 
33 | COPY --chown=root:root --from=build-env \
34 | 	/usr/src/http-clock/target/release/http-clock \
35 | 	/usr/bin/http-clock
36 | 
37 | CMD ["/usr/bin/http-clock"]
38 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | BSD 2-Clause License
 2 | 
 3 | Copyright (c) 2024, yanorei32
 4 | All rights reserved.
 5 | 
 6 | Redistribution and use in source and binary forms, with or without
 7 | modification, are permitted provided that the following conditions are met:
 8 | 
 9 | * Redistributions of source code must retain the above copyright notice, this
10 |   list of conditions and the following disclaimer.
11 | 
12 | * Redistributions in binary form must reproduce the above copyright notice,
13 |   this list of conditions and the following disclaimer in the documentation
14 |   and/or other materials provided with the distribution.
15 | 
16 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
20 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 | SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 | OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # HTTP Clock
 2 | 
 3 | ## Hosted Version
 4 | 
 5 | https://httpclock.yr32.net/
 6 | 
 7 | ## But, Why?
 8 | 
 9 | [HTTP Clockを支える技術 ACT.1](https://blog.yr32.net/post/http-clock-act1/)
10 | 
11 | ## Self-host Quick Start
12 | 
13 | ```bash
14 | docker run --rm -it -p 3000:3000 ghcr.io/yanorei32/http-clock
15 | ```
16 | 
17 | ## Self-build Quick Start
18 | 
19 | ```bash
20 | git clone https://github.com/yanorei32/http-clock
21 | cd http-clock
22 | cargo run # by default, listens in 0.0.0.0:3000
23 | ```
24 | 
25 | If you don't have cargo, you can get it with [rustup](https://www.rust-lang.org/tools/install).
26 | 


--------------------------------------------------------------------------------
/assets/banner.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | 	<head>
 4 | 		<title>HTTP Clock Banner</title>
 5 | 		<meta name="viewport" content="width=device-width, initial-scale=1">
 6 | 		<meta property="developers" content="yanorei32 & RyotaK">
 7 | 		<meta property="references" content="xorrvin">
 8 | 		<style>
 9 | 			.container { max-width: 400px; margin: auto; }
10 | 			xmp { overflow-x: scroll; overflow-y: inherit; }
11 | 			img {
12 | 				image-rendering: pixelated;
13 | 				image-rendering: crisp-edges;
14 | 			}
15 | 		</style>
16 | 	</head>
17 | 	<body>
18 | 		<div class=container>
19 | 			<h1>HTTP Clock Banner</h1>
20 | 			<p>Do you want the HTTP Clock banner?</p>
21 | 			<p>We have a nice banner!</p>
22 | 			<center><img width=50% src=/banner.gif></center>
23 | 			<code>
24 | <xmp>
25 | <a href=https://httpclock.yr32.net/>
26 |   <img src=https://httpclock.yr32.net/banner.gif alt="HTTP Clock" style="image-rendering: pixelated; image-rendering: crisp-edges;">
27 | </a>
28 | </xmp>
29 | 			</code>
30 | 			<p>You <b>MUST</b> hotlink the banner. </p>
31 | 		</div>
32 | 	</body>
33 | </html>
34 | 


--------------------------------------------------------------------------------
/assets/head.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE HTML>
 2 | <html lang="en">
 3 |   <head>
 4 |     <title>HTTP Clock (JST)</title>
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 6 |     <meta property="developers" content="yanorei32 & RyotaK">
 7 |     <meta property="references" content="xorrvin">
 8 |     <style>
 9 |       .container { max-width: 400px; margin: auto; }
10 |     </style>
11 |   </head>
12 |   <body>
13 |     <div class=container>
14 |       <h1>HTTP Clock </h1>
15 |       <p>This page does not use JavaScript, so you can use it even if NoScript is enabled.</p>
16 |       <p>This page is not intended to provide exact times.</p>
17 |       <p>If you fear CSS too, you can use the <a href=/svg>SVG Edition</a>.</p>
18 |       <p>Do you feel it's a dirty hack? Check out the <a href=/select>SELECT edition</a> too!</p>
19 |       <p>Are you a Safari fan? esu nac uoY <a href=/rtl>RTL edition</a> !</p>
20 |       <p>Want to embed this on your web site? <a href=/banner>GIF Banner</a></p>
21 | 


--------------------------------------------------------------------------------
/assets/rtl_head.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE HTML>
 2 | <html lang="en">
 3 |   <head>
 4 |     <title>HTTP Clock RTL Edition (JST)</title>
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 6 |     <meta property="developers" content="yanorei32 & RyotaK & lemoncmd">
 7 |     <meta property="references" content="xorrvin">
 8 |   </head>
 9 |   <body>
10 |     <center>
11 |       <h1>HTTP Clock (RTL Edition)</h1>
12 |       <p>This page uses neither JavaScript, CSS nor SVG, so you can use it even if NoScript is enabled.</p>
13 |       <p>This page is not intended to provide exact times.</p>
14 |       <textarea cols=55 rows=2 wrap=off spellcheck=false autocomplete=off>
15 | 


--------------------------------------------------------------------------------
/assets/select_head.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE HTML>
 2 | <html lang="en">
 3 |   <head>
 4 |     <title>HTTP Clock SELECT Edition (JST)</title>
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 6 |     <meta property="developers" content="yanorei32 & RyotaK">
 7 |     <meta property="references" content="xorrvin">
 8 |   </head>
 9 |   <body>
10 |     <center>
11 |       <h1>HTTP Clock (SELECT Edition)</h1>
12 |       <p>This page uses neither JavaScript, CSS nor SVG, so you can use it even if NoScript is enabled.</p>
13 |       <p>This page is not intended to provide exact times.</p>
14 |       <select>
15 | 


--------------------------------------------------------------------------------
/assets/svg_head.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE HTML>
 2 | <html lang="en">
 3 |   <head>
 4 |     <title>HTTP Clock SVG Edition (JST)</title>
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 6 |     <meta property="developers" content="yanorei32 & RyotaK">
 7 |     <meta property="references" content="xorrvin">
 8 |   </head>
 9 |   <body>
10 |     <center>
11 |       <h1>HTTP Clock (SVG Edition)</h1>
12 |       <p>This page uses neither JavaScript nor CSS, so you can use it even if NoScript is enabled.</p>
13 |       <p>This page is not intended to provide exact times.</p>
14 |       <svg viewBox="0 0 320 240">
15 | 


--------------------------------------------------------------------------------
/renovate.json:
--------------------------------------------------------------------------------
1 | {
2 |   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
3 |   "extends": [
4 |     "config:recommended",
5 |     "https://github.com/arkedge/renovate-config/raw/main/rust-toolchain.json5"
6 |   ]
7 | }
8 | 


--------------------------------------------------------------------------------
/rust-toolchain:
--------------------------------------------------------------------------------
1 | [toolchain]
2 | channel = "1.87.0"
3 | 


--------------------------------------------------------------------------------
/src/connection_counter.rs:
--------------------------------------------------------------------------------
 1 | use std::sync::atomic::{AtomicUsize, Ordering};
 2 | use std::sync::Arc;
 3 | 
 4 | #[derive(Clone)]
 5 | pub struct ConnectionCounter {
 6 |     count: Arc<AtomicUsize>,
 7 | }
 8 | 
 9 | pub struct Session<'a> {
10 |     counter: &'a ConnectionCounter,
11 | }
12 | 
13 | impl ConnectionCounter {
14 |     pub fn new() -> Self {
15 |         ConnectionCounter {
16 |             count: Arc::new(AtomicUsize::from(0)),
17 |         }
18 |     }
19 | 
20 |     pub fn acquire(&self) -> Session {
21 |         self.count.fetch_add(1, Ordering::Relaxed);
22 |         tracing::info!("Connection is established. conns: {}", self.current());
23 | 
24 |         Session { counter: self }
25 |     }
26 | 
27 |     pub fn release(&self) {
28 |         self.count.fetch_sub(1, Ordering::Relaxed);
29 |     }
30 | 
31 |     pub fn current(&self) -> usize {
32 |         self.count.load(Ordering::Relaxed)
33 |     }
34 | }
35 | 
36 | impl Drop for Session<'_> {
37 |     fn drop(&mut self) {
38 |         self.counter.release();
39 |         tracing::info!(
40 |             "Connection has been closed. conns: {}",
41 |             self.counter.current()
42 |         );
43 |     }
44 | }
45 | 


--------------------------------------------------------------------------------
/src/gif_banner.rs:
--------------------------------------------------------------------------------
  1 | use std::io::Cursor;
  2 | 
  3 | use crate::{
  4 |     model::Context,
  5 |     mygif::{
  6 |         Block, Color, Extension, Gif, GraphicControlExtensionPacked, GraphicsControlExtension,
  7 |         HeaderPacked, Image, ImagePacked, ImagePositioned, Position, Size, Version,
  8 |     },
  9 |     Clock, ConnectionCounter,
 10 | };
 11 | 
 12 | use async_stream::try_stream;
 13 | use axum::{
 14 |     body::Body,
 15 |     extract::State,
 16 |     http::{header, HeaderMap, HeaderName},
 17 |     response::IntoResponse,
 18 | };
 19 | use binrw::BinWrite;
 20 | use bytes::Bytes;
 21 | use futures::Stream;
 22 | use once_cell::sync::OnceCell;
 23 | 
 24 | const GLYPH_COUNT: usize = 13;
 25 | const FONT_SIZE: Size = Size::new(6, 10);
 26 | 
 27 | static LZW_ENCODED_FONTS: OnceCell<[bytes::Bytes; GLYPH_COUNT]> = OnceCell::new();
 28 | static LZW_ENCODED_BG: OnceCell<bytes::Bytes> = OnceCell::new();
 29 | static GIF_HEADER: OnceCell<bytes::Bytes> = OnceCell::new();
 30 | static GLYPHS: [&[u8; (FONT_SIZE.width * FONT_SIZE.height) as usize]; GLYPH_COUNT] = [
 31 |     b"\
 32 | _####_\
 33 | ######\
 34 | ##__##\
 35 | ##__##\
 36 | ##__##\
 37 | ##__##\
 38 | ##__##\
 39 | ##__##\
 40 | ######\
 41 | _####_\
 42 | ",
 43 |     b"\
 44 | ___##_\
 45 | _####_\
 46 | _####_\
 47 | ___##_\
 48 | ___##_\
 49 | ___##_\
 50 | ___##_\
 51 | ___##_\
 52 | ___##_\
 53 | ___##_\
 54 | ",
 55 |     b"\
 56 | _####_\
 57 | ######\
 58 | ____##\
 59 | ____##\
 60 | _#####\
 61 | _####_\
 62 | ##____\
 63 | ##____\
 64 | ######\
 65 | ######\
 66 | ",
 67 |     b"\
 68 | #####_\
 69 | ######\
 70 | ____##\
 71 | ____##\
 72 | ######\
 73 | ######\
 74 | ____##\
 75 | ____##\
 76 | ######\
 77 | #####_\
 78 | ",
 79 |     b"\
 80 | ##__##\
 81 | ##__##\
 82 | ##__##\
 83 | ##__##\
 84 | ######\
 85 | ######\
 86 | ____##\
 87 | ____##\
 88 | ____##\
 89 | ____##\
 90 | ",
 91 |     b"\
 92 | ######\
 93 | ######\
 94 | ##____\
 95 | ##____\
 96 | #####_\
 97 | _#####\
 98 | ____##\
 99 | ____##\
100 | ######\
101 | #####_\
102 | ",
103 |     b"\
104 | _####_\
105 | ######\
106 | ##____\
107 | ##____\
108 | #####_\
109 | ######\
110 | ##__##\
111 | ##__##\
112 | ######\
113 | _####_\
114 | ",
115 |     b"\
116 | ######\
117 | ######\
118 | ##__##\
119 | ##__##\
120 | ____##\
121 | ____##\
122 | ____##\
123 | ____##\
124 | ____##\
125 | ____##\
126 | ",
127 |     b"\
128 | _####_\
129 | ######\
130 | ##__##\
131 | ##__##\
132 | ######\
133 | ######\
134 | ##__##\
135 | ##__##\
136 | ######\
137 | _####_\
138 | ",
139 |     b"\
140 | _####_\
141 | ######\
142 | ##__##\
143 | ##__##\
144 | ######\
145 | _#####\
146 | ____##\
147 | ____##\
148 | ######\
149 | _####_\
150 | ",
151 |     b"\
152 | ______\
153 | ______\
154 | ______\
155 | ______\
156 | ######\
157 | ######\
158 | ______\
159 | ______\
160 | ______\
161 | ______\
162 | ",
163 |     b"\
164 | ______\
165 | ______\
166 | __##__\
167 | __##__\
168 | ______\
169 | ______\
170 | ______\
171 | __##__\
172 | __##__\
173 | ______\
174 | ",
175 |     b"\
176 | ######\
177 | ##__##\
178 | #____#\
179 | ###__#\
180 | ###__#\
181 | ##___#\
182 | ##__##\
183 | ######\
184 | ##__##\
185 | ######\
186 | ",
187 | ];
188 | 
189 | fn to_codepoint(c: u8) -> usize {
190 |     match c {
191 |         b'0' => 0,
192 |         b'1' => 1,
193 |         b'2' => 2,
194 |         b'3' => 3,
195 |         b'4' => 4,
196 |         b'5' => 5,
197 |         b'6' => 6,
198 |         b'7' => 7,
199 |         b'8' => 8,
200 |         b'9' => 9,
201 |         b'-' => 10,
202 |         b':' => 11,
203 |         _ => 12,
204 |     }
205 | }
206 | 
207 | #[allow(clippy::identity_op)]
208 | #[allow(clippy::erasing_op)]
209 | pub fn encode(ctx: &Context) -> bytes::Bytes {
210 |     let mut buffer = Cursor::new(vec![]);
211 | 
212 |     let yea_a = ctx.jst.as_bytes()[0];
213 |     let yea_b = ctx.jst.as_bytes()[1];
214 |     let yea_c = ctx.jst.as_bytes()[2];
215 |     let yea_d = ctx.jst.as_bytes()[3];
216 |     let sep_ym = ctx.jst.as_bytes()[4];
217 |     let mon_h = ctx.jst.as_bytes()[5];
218 |     let mon_l = ctx.jst.as_bytes()[6];
219 |     let sep_md = ctx.jst.as_bytes()[7];
220 |     let day_h = ctx.jst.as_bytes()[8];
221 |     let day_l = ctx.jst.as_bytes()[9];
222 |     let _ = ctx.jst.as_bytes()[10];
223 |     let hou_h = ctx.jst.as_bytes()[11];
224 |     let hou_l = ctx.jst.as_bytes()[12];
225 |     let sep_hm = ctx.jst.as_bytes()[13];
226 |     let min_h = ctx.jst.as_bytes()[14];
227 |     let min_l = ctx.jst.as_bytes()[15];
228 |     let sep_ms = ctx.jst.as_bytes()[16];
229 |     let sec_h = ctx.jst.as_bytes()[17];
230 |     let sec_l = ctx.jst.as_bytes()[18];
231 | 
232 |     let glyphs = &LZW_ENCODED_FONTS.get().unwrap();
233 | 
234 |     let blocks = [
235 |         Block::Extension(Extension::GraphicsControlExtension(
236 |             GraphicsControlExtension {
237 |                 delay_time: 2,
238 |                 transpalent_color_index: 0,
239 |                 packed: GraphicControlExtensionPacked::new(),
240 |             },
241 |         )),
242 |         Block::Image(ImagePositioned {
243 |             position: Position::new(0, 0),
244 |             image: Image {
245 |                 size: Size::new(88, 31),
246 |                 packed: ImagePacked::new(),
247 |                 local_color_table: vec![],
248 |                 lzw_binary: LZW_ENCODED_BG.get().unwrap().to_vec(),
249 |             },
250 |         }),
251 |         Block::Extension(Extension::GraphicsControlExtension(
252 |             GraphicsControlExtension {
253 |                 delay_time: 2,
254 |                 transpalent_color_index: 0,
255 |                 packed: GraphicControlExtensionPacked::new(),
256 |             },
257 |         )),
258 |         Block::Image(ImagePositioned {
259 |             position: Position::new(9 + 7 + 7 * 7, 16),
260 |             image: Image {
261 |                 size: Size::new(6, 10),
262 |                 packed: ImagePacked::new(),
263 |                 local_color_table: vec![],
264 |                 lzw_binary: glyphs[to_codepoint(sec_l)].to_vec(),
265 |             },
266 |         }),
267 |         Block::Extension(Extension::GraphicsControlExtension(
268 |             GraphicsControlExtension {
269 |                 delay_time: 2,
270 |                 transpalent_color_index: 0,
271 |                 packed: GraphicControlExtensionPacked::new(),
272 |             },
273 |         )),
274 |         Block::Image(ImagePositioned {
275 |             position: Position::new(9 + 7 + 7 * 6, 16),
276 |             image: Image {
277 |                 size: Size::new(6, 10),
278 |                 packed: ImagePacked::new(),
279 |                 local_color_table: vec![],
280 |                 lzw_binary: glyphs[to_codepoint(sec_h)].to_vec(),
281 |             },
282 |         }),
283 |         Block::Extension(Extension::GraphicsControlExtension(
284 |             GraphicsControlExtension {
285 |                 delay_time: 2,
286 |                 transpalent_color_index: 0,
287 |                 packed: GraphicControlExtensionPacked::new(),
288 |             },
289 |         )),
290 |         Block::Image(ImagePositioned {
291 |             position: Position::new(9 + 7 + 7 * 5, 16),
292 |             image: Image {
293 |                 size: Size::new(6, 10),
294 |                 packed: ImagePacked::new(),
295 |                 local_color_table: vec![],
296 |                 lzw_binary: glyphs[to_codepoint(sep_ms)].to_vec(),
297 |             },
298 |         }),
299 |         Block::Extension(Extension::GraphicsControlExtension(
300 |             GraphicsControlExtension {
301 |                 delay_time: 2,
302 |                 transpalent_color_index: 0,
303 |                 packed: GraphicControlExtensionPacked::new(),
304 |             },
305 |         )),
306 |         Block::Image(ImagePositioned {
307 |             position: Position::new(9 + 7 + 7 * 4, 16),
308 |             image: Image {
309 |                 size: Size::new(6, 10),
310 |                 packed: ImagePacked::new(),
311 |                 local_color_table: vec![],
312 |                 lzw_binary: glyphs[to_codepoint(min_l)].to_vec(),
313 |             },
314 |         }),
315 |         Block::Extension(Extension::GraphicsControlExtension(
316 |             GraphicsControlExtension {
317 |                 delay_time: 2,
318 |                 transpalent_color_index: 0,
319 |                 packed: GraphicControlExtensionPacked::new(),
320 |             },
321 |         )),
322 |         Block::Image(ImagePositioned {
323 |             position: Position::new(9 + 7 + 7 * 3, 16),
324 |             image: Image {
325 |                 size: Size::new(6, 10),
326 |                 packed: ImagePacked::new(),
327 |                 local_color_table: vec![],
328 |                 lzw_binary: glyphs[to_codepoint(min_h)].to_vec(),
329 |             },
330 |         }),
331 |         Block::Extension(Extension::GraphicsControlExtension(
332 |             GraphicsControlExtension {
333 |                 delay_time: 2,
334 |                 transpalent_color_index: 0,
335 |                 packed: GraphicControlExtensionPacked::new(),
336 |             },
337 |         )),
338 |         Block::Image(ImagePositioned {
339 |             position: Position::new(9 + 7 + 7 * 2, 16),
340 |             image: Image {
341 |                 size: Size::new(6, 10),
342 |                 packed: ImagePacked::new(),
343 |                 local_color_table: vec![],
344 |                 lzw_binary: glyphs[to_codepoint(sep_hm)].to_vec(),
345 |             },
346 |         }),
347 |         Block::Extension(Extension::GraphicsControlExtension(
348 |             GraphicsControlExtension {
349 |                 delay_time: 2,
350 |                 transpalent_color_index: 0,
351 |                 packed: GraphicControlExtensionPacked::new(),
352 |             },
353 |         )),
354 |         Block::Image(ImagePositioned {
355 |             position: Position::new(9 + 7 + 7 * 1, 16),
356 |             image: Image {
357 |                 size: Size::new(6, 10),
358 |                 packed: ImagePacked::new(),
359 |                 local_color_table: vec![],
360 |                 lzw_binary: glyphs[to_codepoint(hou_l)].to_vec(),
361 |             },
362 |         }),
363 |         Block::Extension(Extension::GraphicsControlExtension(
364 |             GraphicsControlExtension {
365 |                 delay_time: 2,
366 |                 transpalent_color_index: 0,
367 |                 packed: GraphicControlExtensionPacked::new(),
368 |             },
369 |         )),
370 |         Block::Image(ImagePositioned {
371 |             position: Position::new(9 + 7 + 7 * 0, 16),
372 |             image: Image {
373 |                 size: Size::new(6, 10),
374 |                 packed: ImagePacked::new(),
375 |                 local_color_table: vec![],
376 |                 lzw_binary: glyphs[to_codepoint(hou_h)].to_vec(),
377 |             },
378 |         }),
379 |         Block::Extension(Extension::GraphicsControlExtension(
380 |             GraphicsControlExtension {
381 |                 delay_time: 2,
382 |                 transpalent_color_index: 0,
383 |                 packed: GraphicControlExtensionPacked::new(),
384 |             },
385 |         )),
386 |         Block::Image(ImagePositioned {
387 |             position: Position::new(9 + 7 * 0, 4),
388 |             image: Image {
389 |                 size: Size::new(6, 10),
390 |                 packed: ImagePacked::new(),
391 |                 local_color_table: vec![],
392 |                 lzw_binary: glyphs[to_codepoint(yea_a)].to_vec(),
393 |             },
394 |         }),
395 |         Block::Extension(Extension::GraphicsControlExtension(
396 |             GraphicsControlExtension {
397 |                 delay_time: 2,
398 |                 transpalent_color_index: 0,
399 |                 packed: GraphicControlExtensionPacked::new(),
400 |             },
401 |         )),
402 |         Block::Image(ImagePositioned {
403 |             position: Position::new(9 + 7 * 1, 4),
404 |             image: Image {
405 |                 size: Size::new(6, 10),
406 |                 packed: ImagePacked::new(),
407 |                 local_color_table: vec![],
408 |                 lzw_binary: glyphs[to_codepoint(yea_b)].to_vec(),
409 |             },
410 |         }),
411 |         Block::Extension(Extension::GraphicsControlExtension(
412 |             GraphicsControlExtension {
413 |                 delay_time: 2,
414 |                 transpalent_color_index: 0,
415 |                 packed: GraphicControlExtensionPacked::new(),
416 |             },
417 |         )),
418 |         Block::Image(ImagePositioned {
419 |             position: Position::new(9 + 7 * 2, 4),
420 |             image: Image {
421 |                 size: Size::new(6, 10),
422 |                 packed: ImagePacked::new(),
423 |                 local_color_table: vec![],
424 |                 lzw_binary: glyphs[to_codepoint(yea_c)].to_vec(),
425 |             },
426 |         }),
427 |         Block::Extension(Extension::GraphicsControlExtension(
428 |             GraphicsControlExtension {
429 |                 delay_time: 2,
430 |                 transpalent_color_index: 0,
431 |                 packed: GraphicControlExtensionPacked::new(),
432 |             },
433 |         )),
434 |         Block::Image(ImagePositioned {
435 |             position: Position::new(9 + 7 * 3, 4),
436 |             image: Image {
437 |                 size: Size::new(6, 10),
438 |                 packed: ImagePacked::new(),
439 |                 local_color_table: vec![],
440 |                 lzw_binary: glyphs[to_codepoint(yea_d)].to_vec(),
441 |             },
442 |         }),
443 |         Block::Extension(Extension::GraphicsControlExtension(
444 |             GraphicsControlExtension {
445 |                 delay_time: 2,
446 |                 transpalent_color_index: 0,
447 |                 packed: GraphicControlExtensionPacked::new(),
448 |             },
449 |         )),
450 |         Block::Image(ImagePositioned {
451 |             position: Position::new(9 + 7 * 4, 4),
452 |             image: Image {
453 |                 size: Size::new(6, 10),
454 |                 packed: ImagePacked::new(),
455 |                 local_color_table: vec![],
456 |                 lzw_binary: glyphs[to_codepoint(sep_ym)].to_vec(),
457 |             },
458 |         }),
459 |         Block::Extension(Extension::GraphicsControlExtension(
460 |             GraphicsControlExtension {
461 |                 delay_time: 2,
462 |                 transpalent_color_index: 0,
463 |                 packed: GraphicControlExtensionPacked::new(),
464 |             },
465 |         )),
466 |         Block::Image(ImagePositioned {
467 |             position: Position::new(9 + 7 * 5, 4),
468 |             image: Image {
469 |                 size: Size::new(6, 10),
470 |                 packed: ImagePacked::new(),
471 |                 local_color_table: vec![],
472 |                 lzw_binary: glyphs[to_codepoint(mon_h)].to_vec(),
473 |             },
474 |         }),
475 |         Block::Extension(Extension::GraphicsControlExtension(
476 |             GraphicsControlExtension {
477 |                 delay_time: 2,
478 |                 transpalent_color_index: 0,
479 |                 packed: GraphicControlExtensionPacked::new(),
480 |             },
481 |         )),
482 |         Block::Image(ImagePositioned {
483 |             position: Position::new(9 + 7 * 6, 4),
484 |             image: Image {
485 |                 size: Size::new(6, 10),
486 |                 packed: ImagePacked::new(),
487 |                 local_color_table: vec![],
488 |                 lzw_binary: glyphs[to_codepoint(mon_l)].to_vec(),
489 |             },
490 |         }),
491 |         Block::Extension(Extension::GraphicsControlExtension(
492 |             GraphicsControlExtension {
493 |                 delay_time: 2,
494 |                 transpalent_color_index: 0,
495 |                 packed: GraphicControlExtensionPacked::new(),
496 |             },
497 |         )),
498 |         Block::Image(ImagePositioned {
499 |             position: Position::new(9 + 7 * 7, 4),
500 |             image: Image {
501 |                 size: Size::new(6, 10),
502 |                 packed: ImagePacked::new(),
503 |                 local_color_table: vec![],
504 |                 lzw_binary: glyphs[to_codepoint(sep_md)].to_vec(),
505 |             },
506 |         }),
507 |         Block::Extension(Extension::GraphicsControlExtension(
508 |             GraphicsControlExtension {
509 |                 delay_time: 2,
510 |                 transpalent_color_index: 0,
511 |                 packed: GraphicControlExtensionPacked::new(),
512 |             },
513 |         )),
514 |         Block::Image(ImagePositioned {
515 |             position: Position::new(9 + 7 * 8, 4),
516 |             image: Image {
517 |                 size: Size::new(6, 10),
518 |                 packed: ImagePacked::new(),
519 |                 local_color_table: vec![],
520 |                 lzw_binary: glyphs[to_codepoint(day_h)].to_vec(),
521 |             },
522 |         }),
523 |         Block::Extension(Extension::GraphicsControlExtension(
524 |             GraphicsControlExtension {
525 |                 delay_time: 2,
526 |                 transpalent_color_index: 0,
527 |                 packed: GraphicControlExtensionPacked::new(),
528 |             },
529 |         )),
530 |         Block::Image(ImagePositioned {
531 |             position: Position::new(9 + 7 * 9, 4),
532 |             image: Image {
533 |                 size: Size::new(6, 10),
534 |                 packed: ImagePacked::new(),
535 |                 local_color_table: vec![],
536 |                 lzw_binary: glyphs[to_codepoint(day_l)].to_vec(),
537 |             },
538 |         }),
539 |     ];
540 | 
541 |     blocks.write_le(&mut buffer).unwrap();
542 | 
543 |     bytes::Bytes::from(buffer.into_inner())
544 | }
545 | 
546 | fn stream(
547 |     mut clock: Clock,
548 |     counter: ConnectionCounter,
549 | ) -> impl Stream<Item = Result<Bytes, Box<dyn std::error::Error + 'static + Send + Sync>>> {
550 |     try_stream! {
551 |         let _session = counter.acquire();
552 |         yield GIF_HEADER.get().unwrap().clone();
553 |         clock.mark_unchanged();
554 | 
555 |         loop {
556 |             let _ = clock.changed().await;
557 |             let partial = clock.borrow_and_update().gif.clone();
558 |             yield partial;
559 |         }
560 |     }
561 | }
562 | 
563 | pub async fn banner_page_handler() -> impl IntoResponse {
564 |     (
565 |         [(header::CONTENT_TYPE, "text/html")],
566 |         include_str!("../assets/banner.html"),
567 |     )
568 | }
569 | 
570 | pub async fn gif_handler(
571 |     headers: HeaderMap,
572 |     State((clock, counter)): State<(Clock, ConnectionCounter)>,
573 | ) -> impl IntoResponse {
574 |     let stream = stream(clock, counter);
575 |     let body = Body::from_stream(stream);
576 | 
577 |     let is_cloudflare = headers.contains_key("cf-ray");
578 | 
579 |     let headers = [
580 |         (
581 |             header::CONTENT_TYPE,
582 |             if is_cloudflare {
583 |                 "application/grpc"
584 |             } else {
585 |                 "image/gif"
586 |             },
587 |         ),
588 |         (
589 |             HeaderName::from_static("x-original-content-type"),
590 |             "image/gif",
591 |         ),
592 |     ];
593 | 
594 |     (headers, body)
595 | }
596 | 
597 | fn init_image() {
598 |     let data: [[u8; (FONT_SIZE.width * FONT_SIZE.height) as usize]; GLYPH_COUNT] = GLYPHS.map(|v| {
599 |         v.map(|c| match c {
600 |             b'_' => 0u8,
601 |             b'#' => 1u8,
602 |             _ => 0u8,
603 |         })
604 |     });
605 | 
606 |     let data: [bytes::Bytes; GLYPH_COUNT] =
607 |         data.map(|raw| bytes::Bytes::from(crate::mygif::do_lzw(&raw)));
608 | 
609 |     LZW_ENCODED_FONTS.set(data).unwrap();
610 | 
611 |     let bg = bytes::Bytes::from(crate::mygif::do_lzw(&[0x00; 88 * 31]));
612 |     LZW_ENCODED_BG.set(bg).unwrap();
613 | }
614 | 
615 | fn init_header() {
616 |     let mut buffer = Cursor::new(vec![]);
617 | 
618 |     let mygif = Gif {
619 |         version: Version::GIF89a,
620 |         screen_width: 88,
621 |         screen_height: 31,
622 |         packed: HeaderPacked::new()
623 |             .with_global_color_table_flag(true)
624 |             .with_color_resolution(7),
625 |         background_color_index: 0x00,
626 |         pixel_aspect_ratio: 0,
627 |         global_color_table: [
628 |             Color::from_rgb(0x00, 0x00, 0x00),
629 |             Color::from_rgb(0xFF, 0xFF, 0xFF),
630 |         ]
631 |         .into(),
632 |         blocks: [
633 |             Block::Extension(Extension::GraphicsControlExtension(
634 |                 GraphicsControlExtension {
635 |                     delay_time: 2,
636 |                     transpalent_color_index: 0,
637 |                     packed: GraphicControlExtensionPacked::new(),
638 |                 },
639 |             )),
640 |             Block::Image(ImagePositioned {
641 |                 position: Position::new(0, 0),
642 |                 image: Image {
643 |                     size: Size::new(88, 31),
644 |                     packed: ImagePacked::new(),
645 |                     local_color_table: vec![],
646 |                     lzw_binary: LZW_ENCODED_BG.get().unwrap().to_vec(),
647 |                 },
648 |             }),
649 |         ]
650 |         .into(),
651 |     };
652 | 
653 |     mygif.write(&mut buffer).unwrap();
654 | 
655 |     GIF_HEADER
656 |         .set(bytes::Bytes::from(buffer.into_inner()))
657 |         .unwrap();
658 | }
659 | 
660 | pub fn initialization() {
661 |     init_image();
662 |     init_header();
663 | }
664 | 


--------------------------------------------------------------------------------
/src/html.rs:
--------------------------------------------------------------------------------
 1 | use crate::{model::Context, Clock, ConnectionCounter};
 2 | 
 3 | use async_stream::try_stream;
 4 | use axum::{
 5 |     body::Body,
 6 |     extract::State,
 7 |     http::{header, HeaderMap, HeaderName},
 8 |     response::IntoResponse,
 9 | };
10 | use bytes::Bytes;
11 | use futures::Stream;
12 | 
13 | pub fn encode(ctx: &Context) -> Bytes {
14 |     let jst = ctx.jst.as_str();
15 |     let timestamp = ctx.timestamp;
16 |     let connection_count = ctx.connection_count;
17 |     let previous_timestamp = ctx.previous_timestamp;
18 | 
19 |     let user_emojis: String = if connection_count <= 50 {
20 |         "👤".repeat(connection_count)
21 |     } else {
22 |         "👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤..".to_string()
23 |     };
24 | 
25 |     bytes::Bytes::from(format!(
26 |         "
27 |             <style>#e{previous_timestamp} {{ display: none; }}</style>\
28 |             <div id=e{timestamp}>\
29 |                 <h2>{jst} <small>(JST)</small></h2>\
30 |                 <p>{connection_count} active connection(s).</p>\
31 |                 <p>{user_emojis}</p>\
32 |             </div>\
33 |         "
34 |     ))
35 | }
36 | 
37 | fn stream(
38 |     mut clock: Clock,
39 |     counter: ConnectionCounter,
40 | ) -> impl Stream<Item = Result<Bytes, Box<dyn std::error::Error + 'static + Send + Sync>>> {
41 |     try_stream! {
42 |         let _session = counter.acquire();
43 |         yield Bytes::from_static(include_bytes!("../assets/head.html"));
44 |         clock.mark_unchanged();
45 | 
46 |         loop {
47 |             let _ = clock.changed().await;
48 |             let partial = clock.borrow_and_update().html.clone();
49 |             yield partial;
50 |         }
51 |     }
52 | }
53 | 
54 | pub async fn handler(
55 |     headers: HeaderMap,
56 |     State((clock, counter)): State<(Clock, ConnectionCounter)>,
57 | ) -> impl IntoResponse {
58 |     let stream = stream(clock, counter);
59 |     let body = Body::from_stream(stream);
60 | 
61 |     let is_cloudflare = headers.contains_key("cf-ray");
62 | 
63 |     let headers = [
64 |         (
65 |             header::CONTENT_TYPE,
66 |             if is_cloudflare {
67 |                 "application/grpc"
68 |             } else {
69 |                 "text/html; charset=utf-8"
70 |             },
71 |         ),
72 |         (
73 |             HeaderName::from_static("x-original-content-type"),
74 |             "text/html; charset=utf-8",
75 |         ),
76 |     ];
77 | 
78 |     (headers, body)
79 | }
80 | 


--------------------------------------------------------------------------------
/src/main.rs:
--------------------------------------------------------------------------------
  1 | use std::net::SocketAddr;
  2 | 
  3 | use axum::{routing::get, Router};
  4 | use chrono::{DateTime, Utc};
  5 | use chrono_tz::Japan;
  6 | use clap::Parser;
  7 | use tokio::{net::TcpListener, sync::watch};
  8 | 
  9 | mod connection_counter;
 10 | mod gif_banner;
 11 | mod html;
 12 | mod model;
 13 | mod mygif;
 14 | mod select;
 15 | mod svg;
 16 | mod rtl;
 17 | 
 18 | use connection_counter::ConnectionCounter;
 19 | 
 20 | type Clock = watch::Receiver<model::ClockData>;
 21 | 
 22 | #[derive(Debug, Parser)]
 23 | struct Cli {
 24 |     #[clap(long, env)]
 25 |     #[clap(default_value = "0.0.0.0:3000")]
 26 |     listen: SocketAddr,
 27 | }
 28 | 
 29 | fn encode(previous_timestamp: i64, connection_count: usize) -> (i64, model::ClockData) {
 30 |     let utc: DateTime<Utc> = Utc::now();
 31 |     let utc = utc
 32 |         .checked_add_signed(chrono::TimeDelta::new(1, 0).unwrap())
 33 |         .unwrap();
 34 | 
 35 |     let timestamp = utc.timestamp_millis();
 36 | 
 37 |     let jst = utc
 38 |         .with_timezone(&Japan)
 39 |         .format("%Y-%m-%d %H:%M:%S")
 40 |         .to_string();
 41 | 
 42 |     let ctx = model::Context {
 43 |         previous_timestamp,
 44 |         timestamp,
 45 |         connection_count,
 46 |         jst,
 47 |     };
 48 | 
 49 |     (
 50 |         timestamp,
 51 |         model::ClockData {
 52 |             svg: svg::encode(&ctx),
 53 |             html: html::encode(&ctx),
 54 |             select: select::encode(&ctx),
 55 |             gif: gif_banner::encode(&ctx),
 56 |             rtl: rtl::encode(&ctx),
 57 |         },
 58 |     )
 59 | }
 60 | 
 61 | #[tokio::main]
 62 | async fn main() {
 63 |     let c = Cli::parse();
 64 | 
 65 |     gif_banner::initialization();
 66 | 
 67 |     tracing_subscriber::fmt()
 68 |         .with_max_level(tracing::Level::INFO)
 69 |         .init();
 70 | 
 71 |     let connection_counter = ConnectionCounter::new();
 72 | 
 73 |     let (clock_source, clock) = watch::channel(encode(0, 0).1);
 74 | 
 75 |     let app = Router::new()
 76 |         .route("/", get(html::handler))
 77 |         .route("/banner", get(gif_banner::banner_page_handler))
 78 |         .route("/banner.gif", get(gif_banner::gif_handler))
 79 |         .route("/svg", get(svg::handler))
 80 |         .route("/rtl", get(rtl::handler))
 81 |         .route("/select", get(select::handler))
 82 |         .with_state((clock, connection_counter.clone()));
 83 | 
 84 |     tokio::spawn(async move {
 85 |         let mut previous_timestamp: i64 = 0;
 86 | 
 87 |         loop {
 88 |             let utc: DateTime<Utc> = Utc::now();
 89 |             let time = encode(previous_timestamp, connection_counter.current());
 90 |             let differencial = 1000 - utc.timestamp_subsec_millis();
 91 | 
 92 |             tokio::time::sleep(std::time::Duration::from_millis(differencial as u64)).await;
 93 | 
 94 |             clock_source.send(time.1).unwrap();
 95 |             previous_timestamp = time.0;
 96 |         }
 97 |     });
 98 | 
 99 |     let listener = TcpListener::bind(c.listen).await.unwrap();
100 |     tracing::info!("listening on {}", listener.local_addr().unwrap());
101 | 
102 |     axum::serve(listener, app).await.unwrap();
103 | }
104 | 


--------------------------------------------------------------------------------
/src/model.rs:
--------------------------------------------------------------------------------
 1 | #[derive(Debug, Clone)]
 2 | pub struct ClockData {
 3 |     pub html: bytes::Bytes,
 4 |     pub svg: bytes::Bytes,
 5 |     pub select: bytes::Bytes,
 6 |     pub gif: bytes::Bytes,
 7 |     pub rtl: bytes::Bytes,
 8 | }
 9 | 
10 | #[derive(Debug, Clone)]
11 | pub struct Context {
12 |     pub previous_timestamp: i64,
13 |     pub timestamp: i64,
14 |     pub connection_count: usize,
15 |     pub jst: String,
16 | }
17 | 


--------------------------------------------------------------------------------
/src/mygif.rs:
--------------------------------------------------------------------------------
  1 | use binrw::{binrw, BinRead, BinWrite};
  2 | use bitfield_struct::bitfield;
  3 | 
  4 | #[bitfield(u8)]
  5 | pub struct HeaderPacked {
  6 |     #[bits(3)]
  7 |     pub size_of_global_color_table: u32,
  8 | 
  9 |     #[bits(1)]
 10 |     pub sort_flag: bool,
 11 | 
 12 |     /// WARNING: Most GIF parser supports 8 bpp only.
 13 |     #[bits(3)]
 14 |     pub color_resolution: usize,
 15 | 
 16 |     #[bits(1)]
 17 |     pub global_color_table_flag: bool,
 18 | }
 19 | 
 20 | impl BinRead for HeaderPacked {
 21 |     type Args<'a> = ();
 22 | 
 23 |     fn read_options<R: std::io::Read + std::io::Seek>(
 24 |         reader: &mut R,
 25 |         _endian: binrw::Endian,
 26 |         _args: Self::Args<'_>,
 27 |     ) -> binrw::BinResult<Self> {
 28 |         let mut packed = [0u8; 1];
 29 |         reader.read_exact(&mut packed)?;
 30 |         Ok(HeaderPacked::from_bits(packed[0]))
 31 |     }
 32 | }
 33 | 
 34 | pub struct HeaderPackedWriteArgs {
 35 |     global_color_table_length: usize,
 36 | }
 37 | 
 38 | impl BinWrite for HeaderPacked {
 39 |     type Args<'a> = HeaderPackedWriteArgs;
 40 | 
 41 |     fn write_options<W: std::io::Write + std::io::Seek>(
 42 |         &self,
 43 |         writer: &mut W,
 44 |         _endian: binrw::Endian,
 45 |         args: Self::Args<'_>,
 46 |     ) -> binrw::BinResult<()> {
 47 |         writer.write_all(&[self
 48 |             .with_global_color_table_flag(args.global_color_table_length != 0)
 49 |             .with_size_of_global_color_table(if args.global_color_table_length == 0 {
 50 |                 0
 51 |             } else {
 52 |                 args.global_color_table_length.ilog2() - 1
 53 |             })
 54 |             .into_bits()])?;
 55 |         Ok(())
 56 |     }
 57 | }
 58 | 
 59 | #[derive(Debug, Clone, Copy)]
 60 | pub enum Version {
 61 |     GIF87a,
 62 |     GIF89a,
 63 | }
 64 | 
 65 | impl BinRead for Version {
 66 |     type Args<'a> = ();
 67 | 
 68 |     fn read_options<R: std::io::Read + std::io::Seek>(
 69 |         reader: &mut R,
 70 |         _endian: binrw::Endian,
 71 |         _args: Self::Args<'_>,
 72 |     ) -> binrw::BinResult<Self> {
 73 |         let mut version = [0u8; 3];
 74 | 
 75 |         reader.read_exact(&mut version)?;
 76 | 
 77 |         Ok(match &version {
 78 |             b"87a" => Self::GIF87a,
 79 |             b"89a" => Self::GIF89a,
 80 |             version => panic!("{version:?} is not supported."),
 81 |         })
 82 |     }
 83 | }
 84 | 
 85 | impl BinWrite for Version {
 86 |     type Args<'a> = ();
 87 | 
 88 |     fn write_options<W: std::io::Write + std::io::Seek>(
 89 |         &self,
 90 |         writer: &mut W,
 91 |         _endian: binrw::Endian,
 92 |         _args: Self::Args<'_>,
 93 |     ) -> binrw::BinResult<()> {
 94 |         match self {
 95 |             Self::GIF87a => writer.write_all(b"87a")?,
 96 |             Self::GIF89a => writer.write_all(b"89a")?,
 97 |         };
 98 | 
 99 |         Ok(())
100 |     }
101 | }
102 | 
103 | #[binrw]
104 | #[derive(Debug)]
105 | pub struct Color {
106 |     pub r: u8,
107 |     pub g: u8,
108 |     pub b: u8,
109 | }
110 | 
111 | impl Color {
112 |     pub const fn from_rgb(r: u8, g: u8, b: u8) -> Self {
113 |         Color { r, g, b }
114 |     }
115 | }
116 | 
117 | #[bitfield(u8)]
118 | pub struct ImagePacked {
119 |     #[bits(3)]
120 |     pub size_of_local_color_table: u32,
121 | 
122 |     #[bits(2)]
123 |     pub reserved: usize,
124 | 
125 |     #[bits(1)]
126 |     pub sort_flag: bool,
127 | 
128 |     #[bits(1)]
129 |     pub interlace_flag: bool,
130 | 
131 |     #[bits(1)]
132 |     pub local_color_table_flag: bool,
133 | }
134 | 
135 | impl BinRead for ImagePacked {
136 |     type Args<'a> = ();
137 | 
138 |     fn read_options<R: std::io::Read + std::io::Seek>(
139 |         reader: &mut R,
140 |         _endian: binrw::Endian,
141 |         _args: Self::Args<'_>,
142 |     ) -> binrw::BinResult<Self> {
143 |         let mut packed = [0u8; 1];
144 |         reader.read_exact(&mut packed)?;
145 |         Ok(ImagePacked::from_bits(packed[0]))
146 |     }
147 | }
148 | 
149 | pub struct ImagePackedWriteArgs {
150 |     local_color_table_length: usize,
151 | }
152 | 
153 | impl BinWrite for ImagePacked {
154 |     type Args<'a> = ImagePackedWriteArgs;
155 | 
156 |     fn write_options<W: std::io::Write + std::io::Seek>(
157 |         &self,
158 |         writer: &mut W,
159 |         _endian: binrw::Endian,
160 |         args: Self::Args<'_>,
161 |     ) -> binrw::BinResult<()> {
162 |         writer.write_all(&[self
163 |             .with_local_color_table_flag(args.local_color_table_length != 0)
164 |             .with_size_of_local_color_table(if args.local_color_table_length == 0 {
165 |                 0
166 |             } else {
167 |                 args.local_color_table_length.ilog2() - 1
168 |             })
169 |             .0])?;
170 |         Ok(())
171 |     }
172 | }
173 | 
174 | #[binrw]
175 | #[derive(Debug, Clone, Copy)]
176 | pub struct Position {
177 |     pub left: u16,
178 |     pub top: u16,
179 | }
180 | 
181 | impl Position {
182 |     pub const fn new(left: u16, top: u16) -> Self {
183 |         Self { left, top }
184 |     }
185 | }
186 | 
187 | #[binrw]
188 | #[derive(Debug, Clone, Copy)]
189 | pub struct Size {
190 |     pub width: u16,
191 |     pub height: u16,
192 | }
193 | 
194 | impl Size {
195 |     pub const fn new(width: u16, height: u16) -> Self {
196 |         Self { width, height }
197 |     }
198 | }
199 | 
200 | #[binrw]
201 | #[derive(Debug)]
202 | pub struct ImagePositioned {
203 |     pub position: Position,
204 |     pub image: Image,
205 | }
206 | 
207 | #[binrw]
208 | #[derive(Debug)]
209 | pub struct Image {
210 |     pub size: Size,
211 | 
212 |     #[bw(args_raw = ImagePackedWriteArgs { local_color_table_length: local_color_table.len() })]
213 |     pub packed: ImagePacked,
214 | 
215 |     /// len is must be 2 or 4 or 8 or 16 or 32 or 64 or 128 or 256
216 |     #[br(count = if packed.local_color_table_flag() {
217 |         2i32.pow(packed.size_of_local_color_table() + 1)
218 |     } else {
219 |         0
220 |     } as usize)]
221 |     #[bw(assert(
222 |         (local_color_table.is_empty() || local_color_table.len().count_ones() == 1)
223 |         && local_color_table.len() <= 256
224 |     ))]
225 |     pub local_color_table: Vec<Color>,
226 | 
227 |     #[bw(calc(crate::mygif::LZW_CODESIZE))]
228 |     pub _lzw_minimum_code_size: u8,
229 | 
230 |     #[br(parse_with = chunked_binary_parser)]
231 |     #[bw(write_with = chunked_binary_writer)]
232 |     pub lzw_binary: Vec<u8>,
233 | }
234 | 
235 | /// WARNING: NON 8 CODESIZE IS NOT SUPPORTED BY FIREFOX
236 | pub const LZW_CODESIZE: u8 = 8;
237 | 
238 | pub fn do_lzw(data: &[u8]) -> Vec<u8> {
239 |     use lzw::{Encoder, LsbWriter};
240 | 
241 |     let mut bin = Vec::new();
242 | 
243 |     let buffer = std::io::Cursor::new(&mut bin);
244 |     let mut encoder = Encoder::new(LsbWriter::new(buffer), LZW_CODESIZE).unwrap();
245 |     encoder.encode_bytes(data).unwrap();
246 |     drop(encoder);
247 | 
248 |     bin
249 | }
250 | 
251 | #[binrw::writer(writer)]
252 | fn chunked_binary_writer(binary: &Vec<u8>) -> binrw::BinResult<()> {
253 |     let binary = binary.as_slice();
254 |     let mut cursor = 0usize;
255 | 
256 |     loop {
257 |         let next_cursor = (cursor + 0xFF).min(binary.len());
258 | 
259 |         let delta_len = next_cursor - cursor;
260 | 
261 |         writer.write_all(&[delta_len as u8])?;
262 | 
263 |         if delta_len == 0 {
264 |             break;
265 |         }
266 | 
267 |         writer.write_all(&binary[cursor..next_cursor])?;
268 |         cursor = next_cursor;
269 |     }
270 | 
271 |     Ok(())
272 | }
273 | 
274 | #[binrw::parser(reader)]
275 | fn chunked_binary_parser() -> binrw::BinResult<Vec<u8>> {
276 |     let mut binary = vec![];
277 |     let mut block_size = [0];
278 | 
279 |     loop {
280 |         reader.read_exact(&mut block_size)?;
281 |         let block_size = block_size[0];
282 | 
283 |         if block_size == 0 {
284 |             break;
285 |         }
286 | 
287 |         let mut chunk = vec![0u8; block_size.into()];
288 |         reader.read_exact(&mut chunk)?;
289 | 
290 |         binary.extend(chunk);
291 |     }
292 | 
293 |     Ok(binary)
294 | }
295 | 
296 | #[binrw::parser(reader, endian)]
297 | fn block_parser() -> binrw::BinResult<Vec<Block>> {
298 |     let mut blocks = Vec::new();
299 | 
300 |     loop {
301 |         let block = Block::read_options(reader, endian, ())?;
302 |         let is_trailer = matches!(&block, Block::Trailer(_));
303 | 
304 |         blocks.push(block);
305 | 
306 |         if is_trailer {
307 |             break;
308 |         }
309 |     }
310 | 
311 |     Ok(blocks)
312 | }
313 | 
314 | #[derive(Debug)]
315 | #[repr(u8)]
316 | pub enum DisposalMethod {
317 |     NoDisposalSpecified = 0,
318 |     DoNotDispose = 1,
319 |     RestoreToBackgroundColor = 2,
320 |     RestoreToPrevious = 3,
321 | }
322 | 
323 | impl DisposalMethod {
324 |     const fn into_bits(self) -> u8 {
325 |         self as _
326 |     }
327 | 
328 |     const fn from_bits(value: u8) -> Self {
329 |         match value {
330 |             0 => Self::NoDisposalSpecified,
331 |             1 => Self::DoNotDispose,
332 |             2 => Self::RestoreToBackgroundColor,
333 |             3 => Self::RestoreToPrevious,
334 |             _ => Self::NoDisposalSpecified,
335 |         }
336 |     }
337 | }
338 | 
339 | #[bitfield(u8)]
340 | pub struct GraphicControlExtensionPacked {
341 |     #[bits(3)]
342 |     pub _reserved: u8,
343 | 
344 |     #[bits(3)]
345 |     pub disposal_method: DisposalMethod,
346 | 
347 |     #[bits(1)]
348 |     pub user_input_flag: bool,
349 | 
350 |     #[bits(1)]
351 |     pub transpalent_color_flag: bool,
352 | }
353 | 
354 | #[binrw]
355 | #[derive(Debug)]
356 | pub struct GraphicsControlExtension {
357 |     #[bw(calc(0x04))]
358 |     pub _block_size: u8,
359 | 
360 |     pub packed: GraphicControlExtensionPacked,
361 | 
362 |     pub delay_time: u16,
363 | 
364 |     pub transpalent_color_index: u8,
365 | 
366 |     #[bw(calc(0x00))]
367 |     pub _terminator: u8,
368 | }
369 | 
370 | impl BinRead for GraphicControlExtensionPacked {
371 |     type Args<'a> = ();
372 | 
373 |     fn read_options<R: std::io::Read + std::io::Seek>(
374 |         reader: &mut R,
375 |         _endian: binrw::Endian,
376 |         _args: Self::Args<'_>,
377 |     ) -> binrw::BinResult<Self> {
378 |         let mut packed = [0u8; 1];
379 |         reader.read_exact(&mut packed)?;
380 |         Ok(Self::from_bits(packed[0]))
381 |     }
382 | }
383 | 
384 | impl BinWrite for GraphicControlExtensionPacked {
385 |     type Args<'a> = ();
386 | 
387 |     fn write_options<W: std::io::Write + std::io::Seek>(
388 |         &self,
389 |         writer: &mut W,
390 |         _endian: binrw::Endian,
391 |         _args: Self::Args<'_>,
392 |     ) -> binrw::BinResult<()> {
393 |         writer.write_all(&[self.into_bits()])?;
394 |         Ok(())
395 |     }
396 | }
397 | 
398 | #[binrw]
399 | #[derive(Debug)]
400 | pub enum Extension {
401 |     #[brw(magic(0xF9u8))]
402 |     GraphicsControlExtension(GraphicsControlExtension),
403 | }
404 | 
405 | #[binrw]
406 | #[derive(Debug)]
407 | pub enum Block {
408 |     #[brw(magic(0x2Cu8))]
409 |     Image(ImagePositioned),
410 | 
411 |     #[brw(magic(0x21u8))]
412 |     Extension(Extension),
413 | 
414 |     #[brw(magic(0x3Bu8))]
415 |     Trailer(()),
416 | }
417 | 
418 | #[binrw]
419 | #[brw(little, magic = b"GIF")]
420 | #[derive(Debug)]
421 | pub struct Gif {
422 |     pub version: Version,
423 | 
424 |     pub screen_width: u16,
425 |     pub screen_height: u16,
426 | 
427 |     #[bw(args_raw = HeaderPackedWriteArgs { global_color_table_length: global_color_table.len() })]
428 |     pub packed: HeaderPacked,
429 | 
430 |     pub background_color_index: u8,
431 | 
432 |     /// Most gif parser supports 1:1 only
433 |     pub pixel_aspect_ratio: u8,
434 | 
435 |     #[br(count = if packed.global_color_table_flag() {
436 |         2i32.pow(packed.size_of_global_color_table() + 1)
437 |     } else {
438 |         0
439 |     } as usize)]
440 |     #[bw(assert(
441 |         (global_color_table.is_empty() || global_color_table.len().count_ones() == 1)
442 |         && global_color_table.len() <= 256
443 |     ))]
444 |     pub global_color_table: Vec<Color>,
445 | 
446 |     #[br(parse_with = block_parser)]
447 |     pub blocks: Vec<Block>,
448 | }
449 | 


--------------------------------------------------------------------------------
/src/rtl.rs:
--------------------------------------------------------------------------------
 1 | use crate::{model::Context, Clock, ConnectionCounter};
 2 | 
 3 | use async_stream::try_stream;
 4 | use axum::{
 5 |     body::Body,
 6 |     extract::State,
 7 |     http::{header, HeaderMap, HeaderName},
 8 |     response::IntoResponse,
 9 | };
10 | use bytes::Bytes;
11 | use futures::Stream;
12 | use itertools::Itertools;
13 | 
14 | pub fn encode(ctx: &Context) -> Bytes {
15 |     let jst = ctx.jst.as_str();
16 |     let connection_count = ctx.connection_count;
17 | 
18 |     let s = format!("     {jst} )JST( / {connection_count} active connection)s(.     ;8328#&");
19 | 
20 |     let buf = itertools::rev(s.into_bytes().into_iter()).collect_vec();
21 | 
22 |     
23 | 
24 |     bytes::Bytes::from(buf)
25 | }
26 | 
27 | fn stream(
28 |     mut clock: Clock,
29 |     counter: ConnectionCounter,
30 | ) -> impl Stream<Item = Result<Bytes, Box<dyn std::error::Error + 'static + Send + Sync>>> {
31 |     try_stream! {
32 |         let _session = counter.acquire();
33 |         yield Bytes::from_static(include_bytes!("../assets/rtl_head.html"));
34 |         clock.mark_unchanged();
35 | 
36 |         loop {
37 |             let _ = clock.changed().await;
38 |             let partial = clock.borrow_and_update().rtl.clone();
39 |             yield partial;
40 |         }
41 |     }
42 | }
43 | 
44 | pub async fn handler(
45 |     headers: HeaderMap,
46 |     State((clock, counter)): State<(Clock, ConnectionCounter)>,
47 | ) -> impl IntoResponse {
48 |     let stream = stream(clock, counter);
49 |     let body = Body::from_stream(stream);
50 | 
51 |     let is_cloudflare = headers.contains_key("cf-ray");
52 | 
53 |     let headers = [
54 |         (
55 |             header::CONTENT_TYPE,
56 |             if is_cloudflare {
57 |                 "application/grpc"
58 |             } else {
59 |                 "text/html; charset=utf-8"
60 |             },
61 |         ),
62 |         (
63 |             HeaderName::from_static("x-original-content-type"),
64 |             "text/html; charset=utf-8",
65 |         ),
66 |     ];
67 | 
68 |     (headers, body)
69 | }
70 | 


--------------------------------------------------------------------------------
/src/select.rs:
--------------------------------------------------------------------------------
 1 | use crate::{model::Context, Clock, ConnectionCounter};
 2 | 
 3 | use async_stream::try_stream;
 4 | use axum::{
 5 |     body::Body,
 6 |     extract::State,
 7 |     http::{header, HeaderMap, HeaderName},
 8 |     response::IntoResponse,
 9 | };
10 | use bytes::Bytes;
11 | use futures::Stream;
12 | 
13 | pub fn encode(ctx: &Context) -> Bytes {
14 |     let jst = ctx.jst.as_str();
15 |     let connection_count = ctx.connection_count;
16 | 
17 |     bytes::Bytes::from(format!(
18 |         "<option selected>{jst} (JST) / {connection_count} active connection(s).</option>\n"
19 |     ))
20 | }
21 | 
22 | fn stream(
23 |     mut clock: Clock,
24 |     counter: ConnectionCounter,
25 | ) -> impl Stream<Item = Result<Bytes, Box<dyn std::error::Error + 'static + Send + Sync>>> {
26 |     try_stream! {
27 |         let _session = counter.acquire();
28 |         yield Bytes::from_static(include_bytes!("../assets/select_head.html"));
29 |         clock.mark_unchanged();
30 | 
31 |         loop {
32 |             let _ = clock.changed().await;
33 |             let partial = clock.borrow_and_update().select.clone();
34 |             yield partial;
35 |         }
36 |     }
37 | }
38 | 
39 | pub async fn handler(
40 |     headers: HeaderMap,
41 |     State((clock, counter)): State<(Clock, ConnectionCounter)>,
42 | ) -> impl IntoResponse {
43 |     let stream = stream(clock, counter);
44 |     let body = Body::from_stream(stream);
45 | 
46 |     let is_cloudflare = headers.contains_key("cf-ray");
47 | 
48 |     let headers = [
49 |         (
50 |             header::CONTENT_TYPE,
51 |             if is_cloudflare {
52 |                 "application/grpc"
53 |             } else {
54 |                 "text/html; charset=utf-8"
55 |             },
56 |         ),
57 |         (
58 |             HeaderName::from_static("x-original-content-type"),
59 |             "text/html; charset=utf-8",
60 |         ),
61 |     ];
62 | 
63 |     (headers, body)
64 | }
65 | 


--------------------------------------------------------------------------------
/src/svg.rs:
--------------------------------------------------------------------------------
 1 | use crate::{model::Context, Clock, ConnectionCounter};
 2 | 
 3 | use async_stream::try_stream;
 4 | use axum::{
 5 |     body::Body,
 6 |     extract::State,
 7 |     http::{header, HeaderMap, HeaderName},
 8 |     response::IntoResponse,
 9 | };
10 | use bytes::Bytes;
11 | use futures::Stream;
12 | 
13 | pub fn encode(ctx: &Context) -> Bytes {
14 |     let jst = ctx.jst.as_str();
15 |     let timestamp = ctx.timestamp;
16 |     let connection_count = ctx.connection_count;
17 | 
18 |     let user_emojis: String = if connection_count <= 20 {
19 |         "👤".repeat(connection_count)
20 |     } else {
21 |         "👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤👤..".to_string()
22 |     };
23 | 
24 |     bytes::Bytes::from(format!("
25 |     <rect x=\"0\" y=\"0\" width=\"320\" height=\"120\" fill=\"black\" />
26 |     <text font-size=\"2em\" x=\"160\" y=\"40\" text-anchor=\"middle\" dominant-baseline=\"middle\" fill=\"white\">{jst}</text>
27 |     <defs>
28 |         <clipPath id=\"clip{timestamp}\">
29 |             <text font-size=\"0.5em\" x=\"160\" y=\"80\" text-anchor=\"middle\" dominant-baseline=\"middle\" fill=\"white\">\
30 |                 Conns: {user_emojis}\
31 |             </text>
32 |         </clipPath>
33 |     </defs>
34 |     <rect x=\"0\" y=\"0\" width=\"320\" height=\"120\" fill=\"white\" clip-path=\"url(#clip{timestamp})\"/>
35 |     "))
36 | }
37 | 
38 | fn stream(
39 |     mut clock: Clock,
40 |     counter: ConnectionCounter,
41 | ) -> impl Stream<Item = Result<Bytes, Box<dyn std::error::Error + 'static + Send + Sync>>> {
42 |     try_stream! {
43 |         let _session = counter.acquire();
44 |         yield Bytes::from_static(include_bytes!("../assets/svg_head.html"));
45 |         clock.mark_unchanged();
46 | 
47 |         loop {
48 |             let _ = clock.changed().await;
49 |             let partial = clock.borrow_and_update().svg.clone();
50 |             yield partial;
51 |         }
52 |     }
53 | }
54 | 
55 | pub async fn handler(
56 |     headers: HeaderMap,
57 |     State((clock, counter)): State<(Clock, ConnectionCounter)>,
58 | ) -> impl IntoResponse {
59 |     let stream = stream(clock, counter);
60 |     let body = Body::from_stream(stream);
61 | 
62 |     let is_cloudflare = headers.contains_key("cf-ray");
63 | 
64 |     let headers = [
65 |         (
66 |             header::CONTENT_TYPE,
67 |             if is_cloudflare {
68 |                 "application/grpc"
69 |             } else {
70 |                 "text/html; charset=utf-8"
71 |             },
72 |         ),
73 |         (
74 |             HeaderName::from_static("x-original-content-type"),
75 |             "text/html; charset=utf-8",
76 |         ),
77 |     ];
78 | 
79 |     (headers, body)
80 | }
81 | 


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