├── .github
    └── dependabot.yml
├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── README.md
├── benchmark
    ├── apisix_conf
    │   ├── apisix.yaml
    │   └── config.yaml
    ├── docker-compose-apisix.yml
    ├── docker-compose-nginx.yml
    ├── docker-compose-penguin.yml
    ├── nginx
    │   ├── Dockerfile
    │   └── nginx.conf
    └── penguin
    │   ├── Dockerfile
    │   └── gateway.yaml
├── gateway.yaml
└── src
    ├── builder
        ├── errors.rs
        └── mod.rs
    ├── clusters
        ├── discovery
        │   └── mod.rs
        ├── errors.rs
        └── mod.rs
    ├── config
        ├── args.rs
        ├── def.rs
        ├── errors.rs
        └── mod.rs
    ├── core
        ├── lb.rs
        ├── mod.rs
        └── plugin.rs
    ├── errors
        └── mod.rs
    ├── lib.rs
    ├── main.rs
    ├── plugins
        ├── cms_rate
        │   └── mod.rs
        ├── echo
        │   └── mod.rs
        ├── errors.rs
        └── mod.rs
    ├── proxy
        ├── errors.rs
        ├── mod.rs
        └── process.rs
    └── utils
        └── mod.rs


/.github/dependabot.yml:
--------------------------------------------------------------------------------
 1 | # To get started with Dependabot version updates, you'll need to specify which
 2 | # package ecosystems to update and where the package manifests are located.
 3 | # Please see the documentation for all configuration options:
 4 | # https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
 5 | 
 6 | version: 2
 7 | updates:
 8 |   - package-ecosystem: "cargo" # See documentation for possible values
 9 |     directory: "/" # Location of package manifests
10 |     schedule:
11 |       interval: "daily"
12 |       time: "22:18"
13 |       timezone: "Asia/Shanghai"
14 |     open-pull-requests-limit: 10
15 |     versioning-strategy: auto


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


--------------------------------------------------------------------------------
/Cargo.lock:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "penguin"
 3 | version = "0.1.0"
 4 | edition = "2021"
 5 | 
 6 | [dependencies]
 7 | async-trait = "0.1.85"
 8 | bytes = {version = "1.10.0"}
 9 | clap = { version = "4.5.37", features = ["derive"] }
10 | config = { version = "0.15.6", default-features = false, features = ["yaml"] }
11 | env_logger = { version = "0.11.6", features = ["unstable-kv"] }
12 | hickory-resolver = "0.24.3"
13 | http = "1.2.0"
14 | humantime-serde = "1.1.1"
15 | log = {version = "0.4.27", features = ["kv"]}
16 | matchit = "0.8.6"
17 | once_cell = "1.20.3"
18 | pingora = { version = "0.4.0", features = ["lb", "openssl"] }
19 | pingora-limits = "0.4.0"
20 | regex = "1.11.1"
21 | serde = { version = "1.0.217", features = ["derive"] }
22 | serde_with = "3.12.0"
23 | serde_yaml = "0.9.34"
24 | snafu = "0.8.5"
25 | tokio = { version = "1.43.0", features = ["full"] }
26 | validator = { version = "0.20.0", features = ["derive"] }
27 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # Penguin API Gateway 
  2 | 
  3 | ## Introduction
  4 | 
  5 | In a word: **Penguin is to Pingora what Kong or APISIX is to openresty.**
  6 | 
  7 | Penguin is an API gateway built on top of [Pingora](https://github.com/cloudflare/pingora).
  8 | 
  9 | Pingora is very similar to openresty, it's a **framework** for building applications. It's **not** an out of box solution that end-user can use. This is where penguin comes in. 
 10 | 
 11 | Penguin is high performance, extensible, and easy to use.
 12 | 
 13 | 
 14 | Key features include:
 15 | - Concise configuration based on YAML
 16 | - Flexible routing matching rules
 17 | - composable plugins
 18 | - **Easy to extend and customize through plugins**
 19 | 
 20 | ## Quick View
 21 | 
 22 | Here's an example of the configuration file:
 23 | 
 24 | ```yaml
 25 | services:
 26 |   - name: service1
 27 |     listeners:
 28 |       - name: listener1
 29 |         address: 0.0.0.0:8080
 30 |         protocol: http
 31 |     routes:
 32 |       - name: public_route
 33 |         match:
 34 |           uri: 
 35 |             regexp: "/public/api/v\\d+.*"
 36 |         plugins:
 37 |           - name: cms_rate
 38 |             config:
 39 |               count: 3
 40 |           - name: echo
 41 |             config:
 42 |               body: "hello, world"
 43 |               status_code: 200
 44 |               headers:
 45 |                 x-custom-header: "123"
 46 |                 foo-bar: "baz"
 47 |         cluster: public_backend_cluster
 48 |       - name: qq
 49 |         match:
 50 |           uri: 
 51 |             exact: "/param"
 52 |         cluster: public_backend_cluster
 53 | 
 54 |     clusters:
 55 |       - name: public_backend_cluster
 56 |         resolver: static
 57 |         lb_policy: round_robin
 58 |         config:
 59 |           endpoints:
 60 |             - 127.0.0.1:9933
 61 |             - 127.0.0.1:9934
 62 | ```
 63 | 
 64 | ## Configuration Explanation
 65 | 
 66 | Here's a detailed explanation of the configuration file:
 67 | 
 68 | 1. pingora supports multiple seperated services, each service has its own listeners and logic. Similarity, our configuration is consists of multiple services.
 69 | ```yaml
 70 | services:
 71 |   - name: service_1
 72 |     # ...
 73 |   - name: service_2
 74 |     # ...
 75 | ```
 76 | 
 77 | 2. Service Configuration:
 78 | ```yaml
 79 | services:
 80 |   - name: service1 # service name, just for user's convenience
 81 |     listeners:
 82 |       - name: listener1
 83 |         address: 0.0.0.0:8443 # address to listen
 84 |         protocol: https # protocol to listen
 85 |         ssl_config: # tls config if protocol is https
 86 |           cert: /path/to/cert
 87 |           key: /path/to/key
 88 |     plugins: # plugins that will be applied to all routes in this service
 89 |       - name: cms_rate # name of the plugin, must match the name in the plugin registry. cms_rate is `count-min-sketch` based rate limiter
 90 |         config: # plugin specific configuration
 91 |           total: 100 # 100 requests per ${interval}
 92 |           interval: 1m
 93 |     routes:
 94 |       - name: route_1
 95 |         match: # match rule is to define how to match incoming requests
 96 |           uri: # match by request uri
 97 |             regexp: "/public/api/v\\d+.*" # {regexp, prefix, exact} are supported
 98 |         plugins: # plugins apply for this route only, order matters, first configured plugin will be applied first
 99 |           - name: cms_rate # name of the plugin, must match the name of the plugin in the plugin registry. cms_rate is `count-min-sketch` based rate limiter
100 |             config: # plugin specific configuration
101 |               total: 3 # 3 requests per ${interval}
102 |               interval: 5s
103 |         cluster: cluster_aa # backend cluster to forward to, use this name to refer to the cluster
104 |       - name: route_hello
105 |         match: # match rule is to define how to match incoming requests
106 |           uri: # match by request uri
107 |             prefix: "/hello" # {regexp, prefix, exact} are supported
108 |         cluster: cluster_bb # backend cluster to forward to, use this name to refer to the cluster
109 |       # other routes
110 |     clusters: # set of backend clusters
111 |       - name: cluster_aa # name of the cluster
112 |         resolver: static # how to resolve ip address of the cluster, currently supported: static, dns (consul, k8s, nacos... are on the roadmap)
113 |         lb_policy: round_robin # load balancing policy, currently supported: round_robin, random
114 |         config: # cluster specific configuration
115 |           endpoints: # for static resolver, just list all backend addresses
116 |             - 127.0.0.1:9933
117 |             - 127.0.0.1:9934
118 |       - name: cluster_bb # name of the cluster
119 |         resolver: dns # use dns resolver
120 |         lb_policy: random # load balancing policy, currently supported: round_robin, random
121 |         config: # cluster specific configuration
122 |           host: foo.svc.bar
123 |           port: 8500
124 | ```
125 | 
126 | 
127 | ## Plugin Development
128 | 
129 | Penguin's plugin system is designed to be highly extensible and customizable. You can easily add new plugins or modify existing ones to suit your needs.
130 | 
131 | To develop a new plugin, you need to implement the `Plugin` trait and register it in the plugin registry. Here's a simple example of how to create a custom plugin:
132 | 
133 | ```rust
134 | use std::{collections::HashMap, sync::Arc};
135 | use async_trait::async_trait;
136 | // and more others ...
137 | use crate::{
138 |     core::plugin::{Plugin, PluginCtx},
139 |     plugins::{PluginResult,errors::*},
140 | };
141 | 
142 | pub const ECHO_PLUGIN_NAME: &str = "echo";
143 | 
144 | #[derive(Clone)]
145 | pub struct EchoPlugin {
146 |     config: Arc<EchoConfig>,
147 | }
148 | 
149 | #[derive(Debug, Deserialize)]
150 | struct EchoConfig {
151 |     body: Bytes,
152 |     status_code: StatusCode,
153 |     headers: Option<HashMap<String, String>>,
154 | }
155 | 
156 | // constructor of the plugin
157 | pub fn create_echo_plugin(cfg: Option<YamlValue>) -> PluginResult<Box<dyn PluginBuilder>> {
158 |     // unmarshal config from yaml
159 |     let config: EchoConfig = serde_yaml::from_value(cfg)?;
160 |     // ...
161 | 
162 |     // create plugin instance
163 |     Ok(Box::new(EchoPlugin { config: Arc::new(config) }))
164 | }
165 | 
166 | #[async_trait]
167 | impl Plugin for EchoPlugin {
168 |     async fn request_filter(&self, session: &mut Session, _ctx: &mut PluginCtx) -> Result<bool> {
169 |         // your logic here
170 |         // you can store your state in _ctx
171 |         // you can use session to write response directly and return Ok(true) to stop proxying
172 |         // return Ok(false) to continue proxying
173 |         Ok(false)
174 |     }
175 | }
176 | ```
177 | 
178 | Then you need to register the plugin in the plugin registry `src/plugins/mod.rs`:
179 | 
180 | ```rust
181 | static PLUGIN_BUILDER_REGISTRY: Lazy<HashMap<&'static str, PluginInitFn>> = Lazy::new(|| {
182 |     let arr: Vec<(&str, PluginInitFn)> = vec![
183 |         (echo::ECHO_PLUGIN_NAME, Arc::new(echo::create_echo_plugin)),
184 |         (cms_rate::CMS_RATE_PLUGIN_NAME, Arc::new(cms_rate::create_cms_rate_limiter)),
185 |         // (your_plugin_name, Arc::new(your_plugin_create_func),
186 |         // and more others ...
187 |     ];
188 |     arr.into_iter().collect()
189 | });
190 | ```
191 | 
192 | That's it! Your plugin is now registered and can be used in the configuration file. ✿✿ヽ(°▽°)ノ✿
193 | 
194 | examples:
195 | - [cms_rate](./src/plugins/cms_rate/mod.rs)
196 | - [echo](./src/plugins/echo/mod.rs)
197 | 
198 | ### Plugin trait
199 | 
200 | Plugin trait is a subset of Pingora's ProxyHttp trait, you can refer to Pingora's [official documentation](https://github.com/cloudflare/pingora/blob/main/docs/user_guide/phase.md) for more information.
201 | 
202 | ```rust
203 | /// Main trait for plugins, defining various filter methods
204 | #[async_trait]
205 | pub trait Plugin: Send + Sync {
206 |     /// Handle the incoming request.
207 |     ///
208 |     /// In this phase, users can parse, validate, rate limit, perform access control and/or
209 |     /// return a response for this request.
210 |     ///
211 |     /// # Arguments
212 |     ///
213 |     /// * `_session` - Mutable reference to the current session
214 |     /// * `_ctx` - Mutable reference to the plugin context
215 |     ///
216 |     /// # Returns
217 |     ///
218 |     /// * `Ok(true)` if a response was sent and the proxy should exit
219 |     /// * `Ok(false)` if the proxy should continue to the next phase
220 |     async fn request_filter(&self, _session: &mut Session, _ctx: &mut PluginCtx) -> Result<bool> {
221 |         Ok(false)
222 |     }
223 | 
224 |     /// Handle the incoming request body.
225 |     ///
226 |     /// This function will be called every time a piece of request body is received.
227 |     ///
228 |     /// # Arguments
229 |     ///
230 |     /// * `_session` - Mutable reference to the current session
231 |     /// * `_body` - Mutable reference to an optional Bytes containing the body chunk
232 |     /// * `_end_of_stream` - Boolean indicating if this is the last chunk
233 |     /// * `_ctx` - Mutable reference to the plugin context
234 |     async fn request_body_filter(
235 |         &self,
236 |         _session: &mut Session,
237 |         _body: &mut Option<Bytes>,
238 |         _end_of_stream: bool,
239 |         _ctx: &mut PluginCtx,
240 |     ) -> Result<()> {
241 |         Ok(())
242 |     }
243 | 
244 |     /// Modify the request before it is sent to the upstream
245 |     ///
246 |     /// # Arguments
247 |     ///
248 |     /// * `_session` - Mutable reference to the current session
249 |     /// * `_upstream_request` - Mutable reference to the upstream request header
250 |     /// * `_ctx` - Mutable reference to the plugin context
251 |     async fn upstream_request_filter(
252 |         &self,
253 |         _session: &mut Session,
254 |         _upstream_request: &mut RequestHeader,
255 |         _ctx: &mut PluginCtx,
256 |     ) -> Result<()> {
257 |         Ok(())
258 |     }
259 | 
260 |     /// Modify the response header before it is sent to the downstream
261 |     ///
262 |     /// # Arguments
263 |     ///
264 |     /// * `_session` - Mutable reference to the current session
265 |     /// * `_upstream_response` - Mutable reference to the upstream response header
266 |     /// * `_ctx` - Mutable reference to the plugin context
267 |     async fn response_filter(
268 |         &self,
269 |         _session: &mut Session,
270 |         _upstream_response: &mut ResponseHeader,
271 |         _ctx: &mut PluginCtx,
272 |     ) -> Result<()> {
273 |         Ok(())
274 |     }
275 | 
276 |     /// Handle the response body chunks
277 |     ///
278 |     /// # Arguments
279 |     ///
280 |     /// * `_session` - Mutable reference to the current session
281 |     /// * `_body` - Mutable reference to an optional Bytes containing the body chunk
282 |     /// * `_end_of_stream` - Boolean indicating if this is the last chunk
283 |     /// * `_ctx` - Mutable reference to the plugin context
284 |     fn response_body_filter(
285 |         &self,
286 |         _session: &mut Session,
287 |         _body: &mut Option<Bytes>,
288 |         _end_of_stream: bool,
289 |         _ctx: &mut PluginCtx,
290 |     ) -> Result<()> {
291 |         Ok(())
292 |     }
293 | }
294 | ```
295 | 
296 | ## Benchmark
297 | 
298 | Test Penguin
299 | ```bash
300 | Running 30s test @ http://penguin:8080/foo/bar
301 |   2 threads and 400 connections
302 |   Thread Stats   Avg      Stdev     Max   +/- Stdev
303 |     Latency    13.00ms   13.87ms  66.50ms   80.90%
304 |     Req/Sec    23.74k     2.16k   27.68k    69.67%
305 |   1416929 requests in 30.04s, 186.48MB read
306 | Requests/sec:  47175.79
307 | Transfer/sec:      6.21MB
308 | ```
309 | 
310 | Test Nginx
311 | ```bash
312 | Running 30s test @ http://nginx:80/foo/bar
313 |   2 threads and 400 connections
314 |   Thread Stats   Avg      Stdev     Max   +/- Stdev
315 |     Latency    19.60ms   85.42ms   1.61s    97.40%
316 |     Req/Sec    24.87k     0.94k   26.70k    72.50%
317 |   1484571 requests in 30.04s, 227.94MB read
318 | Requests/sec:  49414.34
319 | Transfer/sec:      7.59MB
320 | ```
321 | Penguin is just a little bit slower than Nginx, but it's still very fast and we have a lot of room to improve.
322 | 
323 | See benchmark directory for more details.
324 | 
325 | ## TODO
326 | 
327 | - resolver:
328 |   - [ ] polarismesh
329 |   - [ ] consul
330 |   - [ ] k8s
331 |   - [ ] nacos
332 | - lb_policy:
333 |   - [ ] least_conn
334 | - plugin:
335 |   - [ ] cors
336 |   - [ ] fault injection
337 |   - [ ] better rate limiter
338 | - auth system
339 | - better error handling
340 | - nginx like logging
341 | - self monitoring
342 | 
343 | 
344 | ## Contributing
345 | 
346 | We welcome contributions to Penguin! If you have any ideas, suggestions, or bug reports, please feel free to open an issue or submit a pull request.
347 | 


--------------------------------------------------------------------------------
/benchmark/apisix_conf/apisix.yaml:
--------------------------------------------------------------------------------
1 | routes:
2 |   - uri: /foo/bar
3 |     plugins:
4 |       mocking:
5 |         delay: 0
6 |         content_type: "text/plain"
7 |         response_status: 200
8 |         response_example: "hello,world!"
9 | #END


--------------------------------------------------------------------------------
/benchmark/apisix_conf/config.yaml:
--------------------------------------------------------------------------------
 1 | apisix:
 2 |   node_listen:
 3 |     - port: 9080
 4 | nginx_config:
 5 |   error_log_level: warn
 6 |   http:
 7 |     enable_access_log: false
 8 | 
 9 | deployment:
10 |   role: data_plane
11 |   role_data_plane:
12 |     config_provider: yaml
13 | 


--------------------------------------------------------------------------------
/benchmark/docker-compose-apisix.yml:
--------------------------------------------------------------------------------
 1 | version: '3'
 2 | 
 3 | services:
 4 |   apisix:
 5 |     image: apache/apisix:3.10.0-debian
 6 |     volumes:
 7 |       - ./apisix_conf/config.yaml:/usr/local/apisix/conf/config.yaml
 8 |       - ./apisix_conf/apisix.yaml:/usr/local/apisix/conf/apisix.yaml
 9 |     environment:
10 |       - APISIX_STAND_ALONE=true
11 |     expose:
12 |       - 9080
13 |     user: "${UID}:${GID}"
14 |     
15 |   wrk:
16 |     image: williamyeh/wrk
17 |     command: -t2 -c400 -d5m http://apisix:9080/foo/bar
18 |     depends_on:
19 |       - apisix


--------------------------------------------------------------------------------
/benchmark/docker-compose-nginx.yml:
--------------------------------------------------------------------------------
 1 | version: '3'
 2 | 
 3 | services:
 4 |   nginx:
 5 |     build: ./nginx
 6 |     expose:
 7 |       - "80"
 8 | 
 9 |   wrk:
10 |     image: williamyeh/wrk
11 |     command: -t2 -c400 -d30s http://nginx:80/foo/bar
12 |     depends_on:
13 |       - nginx


--------------------------------------------------------------------------------
/benchmark/docker-compose-penguin.yml:
--------------------------------------------------------------------------------
 1 | version: '3'
 2 | 
 3 | services:
 4 |   penguin:
 5 |     build: 
 6 |       dockerfile: ./benchmark/penguin/Dockerfile
 7 |       context: ..
 8 |     expose:
 9 |       - "8080"
10 |     
11 |   wrk:
12 |     image: williamyeh/wrk
13 |     command: -t2 -c400 -d30s http://penguin:8080/foo/bar
14 |     depends_on:
15 |       - penguin
16 | 
17 |   apisix:
18 |     image: apache/apisix:3.2.1-debian
19 |     volumes:
20 |       - ./apisix_conf/config.yaml:/usr/local/apisix/conf/config.yaml:ro
21 |       - ./apisix_conf/apisix.yaml:/usr/local/apisix/conf/apisix.yaml:ro
22 |     environment:
23 |       - APISIX_STAND_ALONE=true
24 |     ports:
25 |       - "9080:9080"
26 |     
27 |   wrk-apisix:
28 |     image: williamyeh/wrk
29 |     command: -t2 -c400 -d30s http://apisix:9080/hello
30 |     depends_on:
31 |       - apisix


--------------------------------------------------------------------------------
/benchmark/nginx/Dockerfile:
--------------------------------------------------------------------------------
1 | FROM nginx:alpine
2 | COPY nginx.conf /etc/nginx/nginx.conf


--------------------------------------------------------------------------------
/benchmark/nginx/nginx.conf:
--------------------------------------------------------------------------------
 1 | events {
 2 |     worker_connections 1024;
 3 | }
 4 | 
 5 | http {
 6 |     access_log off;  # 关闭access log
 7 |     
 8 |     server {
 9 |         listen 80;
10 |         location /foo/bar {
11 |             return 200 "Hello, World!";
12 |         }
13 |     }
14 | }


--------------------------------------------------------------------------------
/benchmark/penguin/Dockerfile:
--------------------------------------------------------------------------------
1 | FROM ubuntu:24.10
2 | ENV RUST_LOG=error
3 | COPY ./target/release/penguin /usr/local/bin/penguin
4 | COPY ./benchmark/penguin/gateway.yaml /etc/penguin/gateway.yaml
5 | CMD ["penguin", "-c", "/etc/penguin/gateway.yaml", "run"]


--------------------------------------------------------------------------------
/benchmark/penguin/gateway.yaml:
--------------------------------------------------------------------------------
 1 | services:
 2 |   - name: service1
 3 |     listeners:
 4 |       - name: listener1
 5 |         address: 0.0.0.0:8080
 6 |         protocol: http
 7 |     routes:
 8 |       - name: public_route
 9 |         match:
10 |           uri: 
11 |             exact: /foo/bar
12 |         plugins:
13 |           - name: echo
14 |             config:
15 |               body: "hello, world"
16 |               status_code: 200
17 |         cluster: public_backend_cluster
18 |     clusters:
19 |       - name: public_backend_cluster
20 |         resolver: static
21 |         lb_policy: round_robin
22 |         config:
23 |           endpoints:
24 |             - 127.0.0.1:9933
25 |             - 127.0.0.1:9934


--------------------------------------------------------------------------------
/gateway.yaml:
--------------------------------------------------------------------------------
 1 | global_plugins:
 2 |   - name: cms_rate # count-min-sketch based rate limiter
 3 |     config:
 4 |       overall: 10
 5 |       interval: 1m
 6 | 
 7 | 
 8 | services:
 9 |   - name: service1
10 |     listeners:
11 |       - name: listener1
12 |         address: 0.0.0.0:8080
13 |         protocol: http
14 |     routes:
15 |       - name: public_route
16 |         match:
17 |           uri: 
18 |             exact: /foo/bar
19 |         plugins:
20 |           - name: cms_rate
21 |             config:
22 |               count: 3
23 |           - name: echo
24 |             config:
25 |               body: "hello, world"
26 |               status_code: 200
27 |         cluster: public_backend_cluster
28 |       - name: qq
29 |         match:
30 |           uri: 
31 |             exact: "/param"
32 |         cluster: public_backend_cluster
33 | 
34 |     clusters:
35 |       - name: public_backend_cluster
36 |         resolver: static
37 |         lb_policy: round_robin
38 |         config:
39 |           endpoints:
40 |             - 127.0.0.1:9933
41 |             - 127.0.0.1:9934


--------------------------------------------------------------------------------
/src/builder/errors.rs:
--------------------------------------------------------------------------------
 1 | use matchit::InsertError;
 2 | use snafu::Snafu;
 3 | 
 4 | use crate::plugins::errors::PluginError;
 5 | 
 6 | #[derive(Debug, Snafu)]
 7 | #[snafu(visibility(pub))]
 8 | pub enum BuilderError {
 9 |     #[snafu(display("Lack config for plugin: {}", name))]
10 |     LackConfig { name: String },
11 |     #[snafu(display("Failed to build plugin: {}, error: {:?}", name, source))]
12 |     PluginBuild { source: PluginError, name: String },
13 |     #[snafu(display("Lack uri for route: {}", name))]
14 |     LackUri { name: String },
15 |     #[snafu(display("Failed to compile regex: {}, error: {:?}", re, source))]
16 |     Regexp { source: regex::Error, re: String },
17 |     #[snafu(display("Failed to insert route: {}, error: {:?}", path, source))]
18 |     InsertRoute { source: InsertError, path: String },
19 | }
20 | 


--------------------------------------------------------------------------------
/src/builder/mod.rs:
--------------------------------------------------------------------------------
 1 | use regex::Regex;
 2 | use snafu::ResultExt;
 3 | use std::collections::HashMap;
 4 | use std::sync::Arc;
 5 | 
 6 | use crate::{
 7 |     clusters::{discovery::ResolverWrapper, Resolver},
 8 |     config::def::{DiscoveryProvider, Plugin, ResolverType, Route, StrMatch},
 9 |     core::plugin::Plugin as PluginTrait,
10 |     plugins::create_plugin_builder,
11 |     proxy::process::{MatchEntry, Pipeline},
12 | };
13 | use errors::*;
14 | 
15 | pub mod errors;
16 | 
17 | pub type BuilderResult<T> = Result<T, errors::BuilderError>;
18 | 
19 | pub fn init_discovery_providers(
20 |     cfg: &[DiscoveryProvider],
21 | ) -> BuilderResult<HashMap<ResolverType, Arc<dyn Resolver>>> {
22 |     let mut providers: HashMap<ResolverType, Arc<dyn Resolver>> = HashMap::new();
23 |     for provider in cfg {
24 |         if provider.resolver_type == ResolverType::DNS {
25 |             let resolver = ResolverWrapper::new();
26 |             providers.insert(ResolverType::DNS, Arc::new(resolver));
27 |         }
28 |     }
29 |     Ok(providers)
30 | }
31 | 
32 | pub fn init_routes(cfg: Vec<Route>) -> BuilderResult<MatchEntry> {
33 |     let mut matcher = MatchEntry::new();
34 |     for one_route in cfg {
35 |         // build plugins
36 |         let ppl = build_pipleline(one_route.plugins, &one_route.cluster)?;
37 | 
38 |         // build matcher
39 |         if let Some(uri) = one_route.matcher.uri {
40 |             match uri {
41 |                 StrMatch::Regexp(re) => {
42 |                     let re = Regex::new(&re).context(RegexpSnafu { re })?;
43 |                     matcher.add_regex_route(re, ppl);
44 |                 }
45 |                 StrMatch::Prefix(prefix) => {
46 |                     matcher
47 |                         .insert_route(revise_prefix(&prefix).as_str(), ppl)
48 |                         .context(InsertRouteSnafu { path: prefix })?;
49 |                 }
50 |                 StrMatch::Exact(exact) => {
51 |                     matcher
52 |                         .insert_route(&exact, ppl)
53 |                         .context(InsertRouteSnafu { path: exact })?;
54 |                 }
55 |             }
56 |         } else {
57 |             unimplemented!("uri is required for now");
58 |         }
59 |     }
60 |     Ok(matcher)
61 | }
62 | 
63 | /// revise prefix to be a valid path for matchit
64 | /// if it suffix of *, remove * and append {*rest}
65 | /// else append {*rest}
66 | fn revise_prefix(prefix: &str) -> String {
67 |     if prefix.ends_with("*") {
68 |         prefix.to_string().replace("*", r"{*rest}")
69 |     } else {
70 |         format!("{}{}", prefix, r"{*rest}")
71 |     }
72 | }
73 | 
74 | fn build_pipleline(cfg: Option<Vec<Plugin>>, cluster: &str) -> BuilderResult<Arc<Pipeline>> {
75 |     let plugin_builder = build_plugin_list(cfg)?;
76 |     Ok(Arc::new(Pipeline::new(
77 |         Arc::new(plugin_builder),
78 |         cluster.to_string(),
79 |     )))
80 | }
81 | 
82 | pub fn build_plugin_list(cfg: Option<Vec<Plugin>>) -> BuilderResult<Vec<Box<dyn PluginTrait>>> {
83 |     let mut plugin_builder = vec![];
84 |     if let Some(plugins) = cfg {
85 |         for pl in plugins {
86 |             let builder = create_plugin_builder(&pl.name, pl.config)
87 |                 .context(PluginBuildSnafu { name: pl.name })?;
88 |             plugin_builder.push(builder);
89 |         }
90 |     }
91 |     Ok(plugin_builder)
92 | }
93 | 


--------------------------------------------------------------------------------
/src/clusters/discovery/mod.rs:
--------------------------------------------------------------------------------
  1 | use crate::clusters::{errors::*, ClusterResult, Resolver};
  2 | use async_trait::async_trait;
  3 | use hickory_resolver::TokioAsyncResolver;
  4 | use once_cell::sync::OnceCell;
  5 | use pingora::lb::{discovery::ServiceDiscovery, Backend};
  6 | use pingora::prelude::*;
  7 | use pingora::protocols::l4::socket::SocketAddr as PingoraSocketAddr;
  8 | use serde::Deserialize;
  9 | use serde_yaml::Value as YamlValue;
 10 | use snafu::ResultExt;
 11 | use std::collections::{BTreeSet, HashMap};
 12 | use std::net::{IpAddr, SocketAddr as StdSocketAddr};
 13 | use std::sync::Arc;
 14 | use std::vec::IntoIter;
 15 | 
 16 | static GLOBAL_RESOLVER: OnceCell<Arc<TokioAsyncResolver>> = OnceCell::new();
 17 | 
 18 | fn get_global_resolver() -> Arc<TokioAsyncResolver> {
 19 |     GLOBAL_RESOLVER
 20 |         .get_or_init(|| Arc::new(TokioAsyncResolver::tokio_from_system_conf().unwrap()))
 21 |         .clone()
 22 | }
 23 | 
 24 | pub struct ResolverWrapper {
 25 |     resolver: Arc<TokioAsyncResolver>,
 26 | }
 27 | 
 28 | impl ResolverWrapper {
 29 |     pub fn new() -> Self {
 30 |         Self {
 31 |             resolver: get_global_resolver(),
 32 |         }
 33 |     }
 34 | }
 35 | 
 36 | impl Default for ResolverWrapper {
 37 |     fn default() -> Self {
 38 |         Self::new()
 39 |     }
 40 | }
 41 | 
 42 | #[async_trait]
 43 | impl Resolver for ResolverWrapper {
 44 |     async fn lookup_ip(&self, name: &str) -> ClusterResult<Vec<IpAddr>> {
 45 |         Ok(self
 46 |             .resolver
 47 |             .lookup_ip(name)
 48 |             .await
 49 |             .context(ResolveIpSnafu { name })?
 50 |             .iter()
 51 |             .collect())
 52 |     }
 53 | }
 54 | 
 55 | pub struct DnsDiscovery {
 56 |     resolver: Arc<dyn Resolver>,
 57 |     name: String,
 58 |     port: u16,
 59 | }
 60 | 
 61 | impl DnsDiscovery {
 62 |     pub fn new(name: String, port: u16, resolver: Arc<dyn Resolver>) -> Self {
 63 |         Self {
 64 |             resolver,
 65 |             name,
 66 |             port,
 67 |         }
 68 |     }
 69 | }
 70 | 
 71 | #[async_trait]
 72 | impl ServiceDiscovery for DnsDiscovery {
 73 |     async fn discover(&self) -> Result<(BTreeSet<Backend>, HashMap<u64, bool>)> {
 74 |         let backends = self
 75 |             .resolver
 76 |             .lookup_ip(self.name.as_str())
 77 |             .await
 78 |             .unwrap()
 79 |             .iter()
 80 |             .map(|ip| Backend {
 81 |                 addr: PingoraSocketAddr::Inet(StdSocketAddr::new(*ip, self.port)),
 82 |                 weight: 1,
 83 |                 ext: http::Extensions::new(),
 84 |             })
 85 |             .collect();
 86 |         Ok((backends, HashMap::new()))
 87 |     }
 88 | }
 89 | 
 90 | #[derive(Debug, Deserialize)]
 91 | struct StaticConfig {
 92 |     endpoints: Vec<StdSocketAddr>,
 93 | }
 94 | 
 95 | pub struct StaticDiscovery {
 96 |     pub backends: Vec<StdSocketAddr>,
 97 | }
 98 | 
 99 | impl StaticDiscovery {
100 |     pub fn new(cfg: Option<YamlValue>) -> ClusterResult<Self> {
101 |         let cfg = cfg.ok_or(ClusterError::LackConfig {
102 |             name: "static".to_string(),
103 |         })?;
104 |         let config: StaticConfig =
105 |             serde_yaml::from_value(cfg).context(StaticConfigSnafu { name: "static" })?;
106 |         Ok(Self {
107 |             backends: config.endpoints,
108 |         })
109 |     }
110 | }
111 | 
112 | impl IntoIterator for StaticDiscovery {
113 |     type Item = StdSocketAddr;
114 |     type IntoIter = IntoIter<Self::Item>;
115 | 
116 |     fn into_iter(self) -> Self::IntoIter {
117 |         self.backends.into_iter()
118 |     }
119 | }
120 | 


--------------------------------------------------------------------------------
/src/clusters/errors.rs:
--------------------------------------------------------------------------------
 1 | use crate::config::def::ResolverType;
 2 | use hickory_resolver::error::ResolveError;
 3 | use serde_yaml::Error as YamlError;
 4 | use snafu::Snafu;
 5 | 
 6 | #[derive(Debug, Snafu)]
 7 | #[snafu(visibility(pub))]
 8 | pub enum ClusterError {
 9 |     #[snafu(display("Invalid static config for {}, reason: {}", name, source))]
10 |     StaticConfig { source: YamlError, name: String },
11 |     #[snafu(display("Lack config for {}", name))]
12 |     LackConfig { name: String },
13 |     #[snafu(display("Failed to build discovery for {} due to {}", name, source))]
14 |     DiscoveryConfig { source: YamlError, name: String },
15 |     #[snafu(display("Invalid port {}", port))]
16 |     InvalidPort { port: String },
17 |     #[snafu(display("Invalid endpoints {}", ep))]
18 |     InvalidEndpoints { ep: String },
19 |     #[snafu(display("Unknown resolver type {:?}", resolver))]
20 |     UnknownResolver { resolver: ResolverType },
21 |     #[snafu(display("Failed to resolve ip for {}", name))]
22 |     ResolveIp { source: ResolveError, name: String },
23 | }
24 | 


--------------------------------------------------------------------------------
/src/clusters/mod.rs:
--------------------------------------------------------------------------------
 1 | use std::{collections::HashMap, net::IpAddr, sync::Arc};
 2 | 
 3 | use crate::{
 4 |     clusters::{
 5 |         discovery::{DnsDiscovery, StaticDiscovery},
 6 |         errors::*,
 7 |     },
 8 |     config::def::{Cluster as ClusterConfig, ResolverType},
 9 |     core::lb::LB,
10 | };
11 | use async_trait::async_trait;
12 | use pingora::lb::{selection::Random, Backends, LoadBalancer};
13 | use serde::Deserialize;
14 | use snafu::ResultExt;
15 | 
16 | pub mod discovery;
17 | pub mod errors;
18 | 
19 | pub type ClusterResult<T> = Result<T, errors::ClusterError>;
20 | 
21 | #[async_trait]
22 | pub trait Resolver: Send + Sync {
23 |     async fn lookup_ip(&self, name: &str) -> ClusterResult<Vec<IpAddr>>;
24 | }
25 | 
26 | pub struct ClusterManager {
27 |     clusters: HashMap<String, Arc<dyn LB>>,
28 | }
29 | 
30 | impl ClusterManager {
31 |     pub fn new(
32 |         cfgs: Vec<ClusterConfig>,
33 |         resolvers: &HashMap<ResolverType, Arc<dyn Resolver>>,
34 |     ) -> ClusterResult<Self> {
35 |         let mut clusters: HashMap<String, Arc<dyn LB>> = HashMap::new();
36 |         for cfg in cfgs {
37 |             match cfg.resolver {
38 |                 ResolverType::DNS => {
39 |                     let resolver = resolvers.get(&ResolverType::DNS).cloned().ok_or(
40 |                         ClusterError::UnknownResolver {
41 |                             resolver: cfg.resolver,
42 |                         },
43 |                     )?;
44 |                     let c: DNSConfig = serde_yaml::from_value(cfg.config.unwrap()).context(
45 |                         errors::DiscoveryConfigSnafu {
46 |                             name: cfg.name.clone(),
47 |                         },
48 |                     )?;
49 |                     let discovery = DnsDiscovery::new(c.host, c.port, resolver);
50 |                     let backends = Backends::new(Box::new(discovery));
51 |                     let lb = LoadBalancer::<Random>::from_backends(backends);
52 |                     clusters.insert(cfg.name, Arc::new(lb));
53 |                 }
54 |                 ResolverType::Static => {
55 |                     let discovery = StaticDiscovery::new(cfg.config)?;
56 |                     let lb = LoadBalancer::<Random>::try_from_iter(discovery).unwrap();
57 |                     clusters.insert(cfg.name, Arc::new(lb));
58 |                 }
59 |             }
60 |         }
61 |         Ok(Self { clusters })
62 |     }
63 |     pub fn get_cluster(&self, name: &str) -> Option<Arc<dyn LB>> {
64 |         self.clusters.get(name).cloned()
65 |     }
66 | }
67 | 
68 | #[derive(Debug, Deserialize)]
69 | struct DNSConfig {
70 |     pub host: String,
71 |     pub port: u16,
72 | }
73 | 


--------------------------------------------------------------------------------
/src/config/args.rs:
--------------------------------------------------------------------------------
 1 | use clap::{Parser, Subcommand};
 2 | use std::path::PathBuf;
 3 | 
 4 | #[derive(Parser, Debug)]
 5 | #[command(author, version, about, long_about = None)]
 6 | pub struct Args {
 7 |     #[arg(short, long, value_name = "FILE", default_value = "gateway.yaml")]
 8 |     pub config: PathBuf,
 9 | 
10 |     #[command(subcommand)]
11 |     pub command: Command,
12 | }
13 | 
14 | #[derive(Subcommand, Debug)]
15 | pub enum Command {
16 |     #[command(name = "validate", about = "Validate the configuration file")]
17 |     ValidateConfig,
18 |     #[command(name = "run", about = "Run the server")]
19 |     Run,
20 | }
21 | 


--------------------------------------------------------------------------------
/src/config/def.rs:
--------------------------------------------------------------------------------
  1 | use std::{collections::HashMap, net::SocketAddr, time::Duration};
  2 | 
  3 | use pingora::server::configuration::ServerConf;
  4 | use serde::{Deserialize, Serialize};
  5 | use serde_yaml::Value as YamlValue;
  6 | use validator::{Validate, ValidationError};
  7 | 
  8 | #[derive(Debug, Serialize, Deserialize, Validate)]
  9 | pub struct Config {
 10 |     #[serde(default)]
 11 |     pub identities: Vec<Identity>,
 12 |     #[validate(length(min = 1))]
 13 |     #[validate(nested)]
 14 |     pub services: Vec<Service>,
 15 |     #[serde(rename = "resolvers", default)]
 16 |     pub discovery_providers: Vec<DiscoveryProvider>,
 17 | }
 18 | 
 19 | #[derive(Debug, Serialize, Deserialize)]
 20 | pub struct Identity {
 21 |     pub name: String,
 22 |     pub basic_auth: Option<BasicAuth>,
 23 |     pub hmac_auth: Option<HmacAuth>,
 24 |     pub jwt_auth: Option<JwtAuth>,
 25 | }
 26 | 
 27 | #[derive(Debug, Serialize, Deserialize)]
 28 | pub struct BasicAuth {
 29 |     pub username: String,
 30 |     pub password: String,
 31 | }
 32 | 
 33 | #[derive(Debug, Serialize, Deserialize)]
 34 | pub struct HmacAuth {
 35 |     pub access_key: String,
 36 |     pub secret_key: String,
 37 | }
 38 | 
 39 | #[derive(Debug, Serialize, Deserialize)]
 40 | pub struct JwtAuth {
 41 |     pub issuer: String,
 42 |     pub secret: String,
 43 | }
 44 | 
 45 | #[derive(Debug, Serialize, Deserialize, Validate)]
 46 | pub struct Service {
 47 |     pub name: String,
 48 |     pub server_conf: Option<ServerConf>,
 49 |     #[validate(length(min = 1))]
 50 |     #[validate(nested)]
 51 |     pub listeners: Vec<Listener>,
 52 |     pub plugins: Option<Vec<Plugin>>,
 53 |     #[validate(length(min = 1))]
 54 |     pub routes: Vec<Route>,
 55 |     pub clusters: Vec<Cluster>,
 56 | }
 57 | 
 58 | #[derive(Debug, Serialize, Deserialize, Validate)]
 59 | #[validate(schema(function = "validate_listener"))]
 60 | pub struct Listener {
 61 |     pub name: String,
 62 |     pub address: SocketAddr,
 63 |     #[serde(default)]
 64 |     pub protocol: Protocol,
 65 |     pub ssl_config: Option<SslConfig>,
 66 | }
 67 | 
 68 | #[derive(Debug, Serialize, Deserialize, Default)]
 69 | pub enum Protocol {
 70 |     #[default]
 71 |     HTTP,
 72 |     HTTPS,
 73 | }
 74 | 
 75 | #[derive(Debug, Serialize, Deserialize)]
 76 | pub struct SslConfig {
 77 |     #[serde(rename = "cert")]
 78 |     pub cert_path: String,
 79 |     #[serde(rename = "key")]
 80 |     pub key_path: String,
 81 | }
 82 | 
 83 | #[derive(Debug, Serialize, Deserialize)]
 84 | pub struct Route {
 85 |     pub name: String,
 86 |     #[serde(rename = "match")]
 87 |     pub matcher: Matcher,
 88 |     pub auth: Option<Auth>,
 89 |     pub plugins: Option<Vec<Plugin>>,
 90 |     pub cluster: String,
 91 | }
 92 | 
 93 | #[derive(Debug, Serialize, Deserialize)]
 94 | pub struct Matcher {
 95 |     pub uri: Option<StrMatch>,
 96 |     pub headers: Option<HashMap<String, StrMatch>>,
 97 | }
 98 | 
 99 | #[derive(Debug, Serialize, Deserialize)]
100 | #[serde(rename_all = "lowercase")]
101 | pub enum StrMatch {
102 |     Regexp(String),
103 |     Prefix(String),
104 |     Exact(String),
105 | }
106 | 
107 | #[derive(Debug, Serialize, Deserialize)]
108 | pub struct Auth {
109 |     #[serde(rename = "type")]
110 |     pub auth_type: String,
111 |     pub allowed_identities: Option<Vec<String>>,
112 |     pub config: Option<ForwardAuthConfig>,
113 | }
114 | 
115 | #[derive(Debug, Serialize, Deserialize)]
116 | pub struct ForwardAuthConfig {
117 |     pub cluster: String,
118 |     pub path: String,
119 |     pub headers_to_forward: Vec<String>,
120 | }
121 | 
122 | #[derive(Debug, Serialize, Deserialize)]
123 | pub struct Plugin {
124 |     pub name: String,
125 |     pub config: Option<YamlValue>,
126 | }
127 | 
128 | #[derive(Debug, Serialize, Deserialize)]
129 | pub struct Cluster {
130 |     pub name: String,
131 |     pub resolver: ResolverType,
132 |     pub lb_policy: LbPolicy,
133 |     pub config: Option<YamlValue>,
134 |     pub health_checks: Option<Vec<HealthCheck>>,
135 | }
136 | 
137 | #[derive(Debug, Serialize, Deserialize, PartialEq)]
138 | #[serde(rename_all = "snake_case")]
139 | pub enum ClusterType {
140 |     StrictDns,
141 |     Static,
142 |     #[serde(other)]
143 |     Unsupported,
144 | }
145 | 
146 | #[derive(Debug, Serialize, Deserialize, PartialEq)]
147 | #[serde(rename_all = "snake_case")]
148 | pub enum LbPolicy {
149 |     RoundRobin,
150 |     LeastConn,
151 |     Random,
152 |     #[serde(other)]
153 |     Unsupported,
154 | }
155 | 
156 | #[derive(Debug, Serialize, Deserialize)]
157 | pub struct HealthCheck {
158 |     #[serde(with = "humantime_serde")]
159 |     pub timeout: Duration,
160 |     #[serde(with = "humantime_serde")]
161 |     pub interval: Duration,
162 |     pub unhealthy_threshold: u32,
163 |     pub healthy_threshold: u32,
164 | }
165 | 
166 | #[derive(Debug, Serialize, Deserialize)]
167 | pub struct DiscoveryProvider {
168 |     pub name: String,
169 |     #[serde(rename = "type")]
170 |     pub resolver_type: ResolverType,
171 |     pub config: Option<YamlValue>,
172 | }
173 | 
174 | #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Hash, Eq)]
175 | #[serde(rename_all = "lowercase")]
176 | pub enum ResolverType {
177 |     DNS,
178 |     Static,
179 | }
180 | 
181 | fn validate_listener(listener: &Listener) -> Result<(), ValidationError> {
182 |     if matches!(listener.protocol, Protocol::HTTPS) && listener.ssl_config.is_none() {
183 |         return Err(ValidationError::new(
184 |             "ssl_config is required for HTTPS listener",
185 |         ));
186 |     }
187 |     Ok(())
188 | }
189 | 


--------------------------------------------------------------------------------
/src/config/errors.rs:
--------------------------------------------------------------------------------
 1 | use config::ConfigError as ExternalConfigError;
 2 | use snafu::Snafu;
 3 | 
 4 | #[derive(Debug, Snafu)]
 5 | #[snafu(visibility(pub))]
 6 | pub enum ConfigError {
 7 |     #[snafu(display("Failed to load config: {}", source))]
 8 |     Config {
 9 |         file_name: String,
10 |         source: ExternalConfigError,
11 |     },
12 | }
13 | 


--------------------------------------------------------------------------------
/src/config/mod.rs:
--------------------------------------------------------------------------------
 1 | use config::{Config, File, FileFormat};
 2 | use errors::*;
 3 | use snafu::ResultExt;
 4 | 
 5 | pub mod args;
 6 | pub mod def;
 7 | pub mod errors;
 8 | 
 9 | pub fn load_config(file_name: &str) -> Result<def::Config, errors::ConfigError> {
10 |     let settings = Config::builder()
11 |         .add_source(File::new(file_name, FileFormat::Yaml))
12 |         .build()
13 |         .context(ConfigSnafu {
14 |             file_name: file_name.to_string(),
15 |         })?;
16 |     settings.try_deserialize().context(ConfigSnafu {
17 |         file_name: file_name.to_string(),
18 |     })
19 | }
20 | 


--------------------------------------------------------------------------------
/src/core/lb.rs:
--------------------------------------------------------------------------------
 1 | use pingora::{
 2 |     http::RequestHeader,
 3 |     lb::{
 4 |         selection::{BackendIter, BackendSelection},
 5 |         Backend, LoadBalancer,
 6 |     },
 7 | };
 8 | 
 9 | /// Trait defining the interface for load balancers
10 | ///
11 | /// This trait should be implemented by types that provide load balancing functionality.
12 | pub trait LB: Send + Sync {
13 |     /// Selects a backend based on the given request header
14 |     ///
15 |     /// # Arguments
16 |     ///
17 |     /// * `header` - The request header to use for backend selection
18 |     ///
19 |     /// # Returns
20 |     ///
21 |     /// An `Option<Backend>` representing the selected backend, or `None` if no backend is available
22 |     fn select_backend(&self, header: &RequestHeader) -> Option<Backend>;
23 | }
24 | 
25 | /// Implementation of the `LB` trait for `LoadBalancer<S>`
26 | ///
27 | /// This implementation allows the Pingora `LoadBalancer` to be used with our `LB` trait.
28 | impl<S> LB for LoadBalancer<S>
29 | where
30 |     S: BackendSelection + Send + Sync + 'static,
31 |     S::Iter: BackendIter,
32 | {
33 |     /// Selects a backend using the Pingora `LoadBalancer`
34 |     ///
35 |     /// This implementation ignores the request header and uses a default key and TTL.
36 |     ///
37 |     /// # Arguments
38 |     ///
39 |     /// * `_header` - The request header (ignored in this implementation)
40 |     ///
41 |     /// # Returns
42 |     ///
43 |     /// An `Option<Backend>` representing the selected backend, or `None` if no backend is available
44 |     fn select_backend(&self, _header: &RequestHeader) -> Option<Backend> {
45 |         self.select(b"", 256)
46 |     }
47 | }
48 | 


--------------------------------------------------------------------------------
/src/core/mod.rs:
--------------------------------------------------------------------------------
1 | /// Module for load balancing related functionality
2 | pub mod lb;
3 | 
4 | /// Module for plugin system implementation
5 | pub mod plugin;
6 | 


--------------------------------------------------------------------------------
/src/core/plugin.rs:
--------------------------------------------------------------------------------
  1 | use async_trait::async_trait;
  2 | use bytes::Bytes;
  3 | use matchit::Params;
  4 | use pingora::{http::ResponseHeader, prelude::*};
  5 | use regex::Captures;
  6 | 
  7 | /// Context for plugin execution
  8 | #[derive(Default)]
  9 | pub struct PluginCtx {
 10 |     pub route_params: Option<RouteParams>,
 11 | }
 12 | 
 13 | /// Main trait for plugins, defining various filter methods
 14 | #[async_trait]
 15 | pub trait Plugin: Send + Sync {
 16 |     /// Handle the incoming request.
 17 |     ///
 18 |     /// In this phase, users can parse, validate, rate limit, perform access control and/or
 19 |     /// return a response for this request.
 20 |     ///
 21 |     /// # Arguments
 22 |     ///
 23 |     /// * `_session` - Mutable reference to the current session
 24 |     /// * `_ctx` - Mutable reference to the plugin context
 25 |     ///
 26 |     /// # Returns
 27 |     ///
 28 |     /// * `Ok(true)` if a response was sent and the proxy should exit
 29 |     /// * `Ok(false)` if the proxy should continue to the next phase
 30 |     async fn request_filter(&self, _session: &mut Session, _ctx: &mut PluginCtx) -> Result<bool> {
 31 |         Ok(false)
 32 |     }
 33 | 
 34 |     /// Handle the incoming request body.
 35 |     ///
 36 |     /// This function will be called every time a piece of request body is received.
 37 |     ///
 38 |     /// # Arguments
 39 |     ///
 40 |     /// * `_session` - Mutable reference to the current session
 41 |     /// * `_body` - Mutable reference to an optional Bytes containing the body chunk
 42 |     /// * `_end_of_stream` - Boolean indicating if this is the last chunk
 43 |     /// * `_ctx` - Mutable reference to the plugin context
 44 |     async fn request_body_filter(
 45 |         &self,
 46 |         _session: &mut Session,
 47 |         _body: &mut Option<Bytes>,
 48 |         _end_of_stream: bool,
 49 |         _ctx: &mut PluginCtx,
 50 |     ) -> Result<()> {
 51 |         Ok(())
 52 |     }
 53 | 
 54 |     /// Modify the request before it is sent to the upstream
 55 |     ///
 56 |     /// # Arguments
 57 |     ///
 58 |     /// * `_session` - Mutable reference to the current session
 59 |     /// * `_upstream_request` - Mutable reference to the upstream request header
 60 |     /// * `_ctx` - Mutable reference to the plugin context
 61 |     async fn upstream_request_filter(
 62 |         &self,
 63 |         _session: &mut Session,
 64 |         _upstream_request: &mut RequestHeader,
 65 |         _ctx: &mut PluginCtx,
 66 |     ) -> Result<()> {
 67 |         Ok(())
 68 |     }
 69 | 
 70 |     /// Modify the response header before it is sent to the downstream
 71 |     ///
 72 |     /// # Arguments
 73 |     ///
 74 |     /// * `_session` - Mutable reference to the current session
 75 |     /// * `_upstream_response` - Mutable reference to the upstream response header
 76 |     /// * `_ctx` - Mutable reference to the plugin context
 77 |     async fn response_filter(
 78 |         &self,
 79 |         _session: &mut Session,
 80 |         _upstream_response: &mut ResponseHeader,
 81 |         _ctx: &mut PluginCtx,
 82 |     ) -> Result<()> {
 83 |         Ok(())
 84 |     }
 85 | 
 86 |     /// Handle the response body chunks
 87 |     ///
 88 |     /// # Arguments
 89 |     ///
 90 |     /// * `_session` - Mutable reference to the current session
 91 |     /// * `_body` - Mutable reference to an optional Bytes containing the body chunk
 92 |     /// * `_end_of_stream` - Boolean indicating if this is the last chunk
 93 |     /// * `_ctx` - Mutable reference to the plugin context
 94 |     fn response_body_filter(
 95 |         &self,
 96 |         _session: &mut Session,
 97 |         _body: &mut Option<Bytes>,
 98 |         _end_of_stream: bool,
 99 |         _ctx: &mut PluginCtx,
100 |     ) -> Result<()> {
101 |         Ok(())
102 |     }
103 | }
104 | 
105 | /// Represents the parameters extracted from a route match
106 | ///
107 | /// This struct encapsulates the parameters that are extracted when a route is matched,
108 | /// either by a regex pattern or a path matching algorithm. It provides a unified
109 | /// interface to access these parameters, regardless of their source.
110 | #[derive(Debug, Default)]
111 | pub struct RouteParams {
112 |     /// A vector of strings containing the captured parameters
113 |     ///
114 |     /// For regex matches, this includes all captured groups.
115 |     /// For path matches, this includes all path segments that were matched as parameters.
116 |     params: Vec<String>,
117 | }
118 | 
119 | impl RouteParams {
120 |     pub fn new_caps(caps: &Captures) -> Self {
121 |         Self {
122 |             params: caps
123 |                 .iter()
124 |                 .filter_map(|s| s.map(|ss| ss.as_str().to_string()))
125 |                 .collect(),
126 |         }
127 |     }
128 | 
129 |     pub fn new_params(params: &Params) -> Self {
130 |         Self {
131 |             params: params.iter().map(|(_, v)| v.to_string()).collect(),
132 |         }
133 |     }
134 | 
135 |     pub fn get(&self, idx: usize) -> Option<&str> {
136 |         self.params.get(idx).map(|s| s.as_str())
137 |     }
138 | }
139 | 


--------------------------------------------------------------------------------
/src/errors/mod.rs:
--------------------------------------------------------------------------------
 1 | use crate::{
 2 |     builder::errors::BuilderError, clusters::errors::ClusterError, config::errors::ConfigError,
 3 | };
 4 | use pingora::BError;
 5 | use snafu::Snafu;
 6 | use validator::ValidationErrors;
 7 | 
 8 | #[derive(Debug, Snafu)]
 9 | #[snafu(visibility(pub))]
10 | pub enum AppError {
11 |     #[snafu(display("Cluster error: {}", source))]
12 |     Cluster { source: ClusterError },
13 |     #[snafu(display("Config error: {}", source))]
14 |     Config { source: ConfigError },
15 |     #[snafu(display("Builder error: {}", source))]
16 |     Builder { source: BuilderError },
17 |     #[snafu(display("Pingora error: {}", source))]
18 |     Pingora { source: BError },
19 |     #[snafu(display("Validation error: {}", source))]
20 |     Validation { source: ValidationErrors },
21 | }
22 | 


--------------------------------------------------------------------------------
/src/lib.rs:
--------------------------------------------------------------------------------
1 | pub mod builder;
2 | pub mod clusters;
3 | pub mod config;
4 | pub mod core;
5 | pub mod errors;
6 | pub mod plugins;
7 | pub mod proxy;
8 | pub mod utils;
9 | 


--------------------------------------------------------------------------------
/src/main.rs:
--------------------------------------------------------------------------------
 1 | use std::{path::PathBuf, sync::Arc};
 2 | 
 3 | use clap::Parser;
 4 | use penguin::{
 5 |     builder::{build_plugin_list, init_discovery_providers, init_routes},
 6 |     clusters::ClusterManager,
 7 |     config::{
 8 |         args::{Args, Command},
 9 |         def::{Config, Listener, Service as ServiceConf},
10 |         load_config,
11 |     },
12 |     errors::*,
13 |     proxy::Proxy,
14 | };
15 | use pingora::{
16 |     prelude::*, proxy::http_proxy_service_with_name, server::configuration::ServerConf,
17 |     services::Service as PingoraServiceTrait,
18 | };
19 | use snafu::ResultExt;
20 | use validator::Validate;
21 | 
22 | fn main() -> Result<(), AppError> {
23 |     let args = Args::parse();
24 |     let buf_writer = std::io::BufWriter::new(std::io::stdout());
25 |     env_logger::Builder::from_default_env()
26 |         .format_timestamp(None)
27 |         .target(env_logger::Target::Pipe(Box::new(buf_writer)))
28 |         .init();
29 |     match args.command {
30 |         Command::ValidateConfig => {
31 |             load_and_validate_config(args.config)?;
32 |             Ok(())
33 |         }
34 |         Command::Run => {
35 |             let config = load_and_validate_config(args.config)?;
36 |             // init discovery providers
37 |             let resolvers = init_discovery_providers(&config.discovery_providers).unwrap();
38 | 
39 |             // init pingora server
40 |             let mut server = Server::new(None).unwrap();
41 | 
42 |             // for each service in config, init its routes, clusters
43 |             // combine them into a Proxy object(which is an implementation of Pingora ProxyHttp Trait)
44 |             // create a pingora service based on the Proxy object
45 |             // add the service to the pingora server
46 |             let mut svcs = vec![];
47 |             for ServiceConf {
48 |                 name,
49 |                 server_conf,
50 |                 plugins,
51 |                 listeners,
52 |                 routes,
53 |                 clusters,
54 |             } in config.services
55 |             {
56 |                 let routes = init_routes(routes).context(BuilderSnafu)?;
57 |                 let clusters = ClusterManager::new(clusters, &resolvers).context(ClusterSnafu)?;
58 |                 let global_plugins = build_plugin_list(plugins).context(BuilderSnafu)?;
59 |                 let proxy = Proxy::new(routes, clusters, global_plugins);
60 |                 let svc =
61 |                     create_service(name, server_conf, listeners, proxy).context(PingoraSnafu)?;
62 |                 svcs.push(svc);
63 |             }
64 |             server.add_services(svcs);
65 |             // run the server
66 |             server.run_forever();
67 |         }
68 |     }
69 | }
70 | 
71 | fn create_service(
72 |     name: String,
73 |     server_conf: Option<ServerConf>,
74 |     listeners: Vec<Listener>,
75 |     proxy: Proxy,
76 | ) -> Result<Box<dyn PingoraServiceTrait>> {
77 |     let mut svc =
78 |         http_proxy_service_with_name(&Arc::new(server_conf.unwrap_or_default()), proxy, &name);
79 |     for listener in listeners {
80 |         let addr = listener.address.to_string();
81 |         match listener.ssl_config {
82 |             Some(ssl_config) => {
83 |                 svc.add_tls(&addr, &ssl_config.cert_path, &ssl_config.key_path)?;
84 |             }
85 |             None => {
86 |                 svc.add_tcp(&addr);
87 |             }
88 |         }
89 |     }
90 |     Ok(Box::new(svc))
91 | }
92 | 
93 | fn load_and_validate_config(path: PathBuf) -> Result<Config, AppError> {
94 |     let config = load_config(path.as_path().to_str().unwrap()).context(ConfigSnafu)?;
95 |     config.validate().context(ValidationSnafu)?;
96 |     Ok(config)
97 | }
98 | 


--------------------------------------------------------------------------------
/src/plugins/cms_rate/mod.rs:
--------------------------------------------------------------------------------
 1 | use std::{sync::Arc, time::Duration};
 2 | 
 3 | use async_trait::async_trait;
 4 | use http::StatusCode;
 5 | use pingora::prelude::*;
 6 | use pingora_limits::rate::Rate;
 7 | use serde::{Deserialize, Serialize};
 8 | use serde_yaml::Value as YamlValue;
 9 | use snafu::ResultExt;
10 | use validator::{Validate, ValidationError};
11 | 
12 | use crate::{
13 |     core::plugin::{Plugin, PluginCtx},
14 |     plugins::{errors::*, PluginResult},
15 |     utils::send_response,
16 | };
17 | 
18 | pub const CMS_RATE_PLUGIN_NAME: &str = "cms_rate";
19 | 
20 | #[derive(Debug, Serialize, Deserialize, Validate)]
21 | pub struct CmsRateConf {
22 |     #[validate(range(min = 1))]
23 |     pub total: isize,
24 |     #[serde(with = "humantime_serde")]
25 |     #[validate(custom(function = "atleast_1_second"))]
26 |     pub interval: Duration,
27 | }
28 | 
29 | fn atleast_1_second(v: &Duration) -> Result<(), ValidationError> {
30 |     if v.as_secs() == 0 {
31 |         return Err(ValidationError::new("interval must be at least 1 second"));
32 |     }
33 |     Ok(())
34 | }
35 | 
36 | pub fn create_cms_rate_limiter(config: Option<YamlValue>) -> PluginResult<Box<dyn Plugin>> {
37 |     let config = config.ok_or(PluginError::LackPluginConfig {
38 |         name: CMS_RATE_PLUGIN_NAME.to_string(),
39 |     })?;
40 |     let cfg: CmsRateConf = serde_yaml::from_value(config).context(YamlErrSnafu {
41 |         name: CMS_RATE_PLUGIN_NAME.to_string(),
42 |     })?;
43 |     cfg.validate().context(ValidateErrSnafu {
44 |         name: CMS_RATE_PLUGIN_NAME.to_string(),
45 |     })?;
46 |     let r = Arc::new(Rate::new(cfg.interval));
47 |     Ok(Box::new(PerRoutePlugin {
48 |         total: cfg.total,
49 |         r,
50 |     }))
51 | }
52 | 
53 | #[derive(Clone)]
54 | pub struct PerRoutePlugin {
55 |     total: isize,
56 |     r: Arc<Rate>,
57 | }
58 | 
59 | #[async_trait]
60 | impl Plugin for PerRoutePlugin {
61 |     async fn request_filter(&self, session: &mut Session, _ctx: &mut PluginCtx) -> Result<bool> {
62 |         let path = session.req_header().uri.path();
63 |         let nc = self.r.observe(&path, 1);
64 |         if nc > self.total {
65 |             send_response(session, StatusCode::TOO_MANY_REQUESTS, None, None, None).await?;
66 |             return Ok(true);
67 |         }
68 |         Ok(false)
69 |     }
70 | }
71 | 


--------------------------------------------------------------------------------
/src/plugins/echo/mod.rs:
--------------------------------------------------------------------------------
 1 | use std::{collections::HashMap, sync::Arc};
 2 | 
 3 | use async_trait::async_trait;
 4 | use bytes::Bytes;
 5 | use http::StatusCode;
 6 | use pingora::prelude::*;
 7 | use serde::Deserialize;
 8 | use serde_yaml::Value as YamlValue;
 9 | use snafu::prelude::*;
10 | 
11 | use crate::{
12 |     core::plugin::{Plugin, PluginCtx},
13 |     plugins::{errors::*, PluginResult},
14 |     utils::send_response,
15 | };
16 | 
17 | pub const ECHO_PLUGIN_NAME: &str = "echo";
18 | 
19 | pub fn create_echo_plugin(cfg: Option<YamlValue>) -> PluginResult<Box<dyn Plugin>> {
20 |     let cfg = cfg.ok_or(PluginError::LackPluginConfig {
21 |         name: ECHO_PLUGIN_NAME.to_string(),
22 |     })?;
23 |     let mut config: EchoConfigRaw = serde_yaml::from_value(cfg).context(YamlErrSnafu {
24 |         name: ECHO_PLUGIN_NAME.to_string(),
25 |     })?;
26 |     // 把config.headers中的key转换为小写
27 |     if let Some(headers) = config.headers.as_mut() {
28 |         *headers = std::mem::take(headers)
29 |             .into_iter()
30 |             .map(|(k, v)| (k.to_lowercase(), v))
31 |             .collect();
32 |     }
33 |     let config = EchoConfig {
34 |         body: Bytes::from(config.body),
35 |         status_code: StatusCode::from_u16(config.status_code.unwrap_or(200))
36 |             .map_err(|e| e.into())
37 |             .context(SpecificErrSnafu {
38 |                 name: ECHO_PLUGIN_NAME.to_string(),
39 |             })?,
40 |         headers: config.headers,
41 |     };
42 |     Ok(Box::new(EchoPlugin {
43 |         config: Arc::new(config),
44 |     }))
45 | }
46 | 
47 | #[derive(Clone)]
48 | pub struct EchoPlugin {
49 |     config: Arc<EchoConfig>,
50 | }
51 | 
52 | #[derive(Debug)]
53 | struct EchoConfig {
54 |     body: Bytes,
55 |     status_code: StatusCode,
56 |     headers: Option<HashMap<String, String>>,
57 | }
58 | 
59 | #[derive(Debug, Deserialize)]
60 | struct EchoConfigRaw {
61 |     body: String,
62 |     status_code: Option<u16>,
63 |     headers: Option<HashMap<String, String>>,
64 | }
65 | 
66 | #[async_trait]
67 | impl Plugin for EchoPlugin {
68 |     async fn request_filter(&self, session: &mut Session, _ctx: &mut PluginCtx) -> Result<bool> {
69 |         send_response(
70 |             session,
71 |             self.config.status_code,
72 |             None,
73 |             Some(self.config.body.clone()),
74 |             self.config.headers.clone(),
75 |         )
76 |         .await?;
77 |         Ok(true)
78 |     }
79 | }
80 | 


--------------------------------------------------------------------------------
/src/plugins/errors.rs:
--------------------------------------------------------------------------------
 1 | use serde_yaml::Error as YamlError;
 2 | use snafu::prelude::*;
 3 | use validator::ValidationErrors;
 4 | 
 5 | #[derive(Debug, Snafu)]
 6 | #[snafu(visibility(pub))]
 7 | pub enum PluginError {
 8 |     #[snafu(display("Unknown plugin: {}", name))]
 9 |     UnknownPlugin { name: String },
10 |     #[snafu(display("Failed to validate plugin: {}, error: {:?}", name, source))]
11 |     ValidateErr {
12 |         source: ValidationErrors,
13 |         name: String,
14 |     },
15 |     #[snafu(display("Failed to parse plugin config: {}, error: {:?}", name, source))]
16 |     YamlErr { source: YamlError, name: String },
17 |     #[snafu(display("Lack plugin config: {}", name))]
18 |     LackPluginConfig { name: String },
19 |     #[snafu(display("Specific error: {}, name: {}", source, name))]
20 |     SpecificErr {
21 |         source: Box<dyn std::error::Error>,
22 |         name: String,
23 |     },
24 | }
25 | 


--------------------------------------------------------------------------------
/src/plugins/mod.rs:
--------------------------------------------------------------------------------
 1 | use std::{collections::HashMap, sync::Arc};
 2 | 
 3 | use crate::core::plugin::Plugin;
 4 | use once_cell::sync::Lazy;
 5 | use serde_yaml::Value as YamlValue;
 6 | 
 7 | pub mod cms_rate;
 8 | pub mod echo;
 9 | pub mod errors;
10 | 
11 | use errors::*;
12 | 
13 | pub type PluginResult<T> = std::result::Result<T, PluginError>;
14 | 
15 | /// Type alias for plugin initialization functions
16 | pub type PluginInitFn =
17 |     Arc<dyn Fn(Option<YamlValue>) -> PluginResult<Box<dyn Plugin>> + Send + Sync>;
18 | 
19 | /// Registry of plugin builders
20 | static PLUGIN_BUILDER_REGISTRY: Lazy<HashMap<&'static str, PluginInitFn>> = Lazy::new(|| {
21 |     let arr: Vec<(&str, PluginInitFn)> = vec![
22 |         (echo::ECHO_PLUGIN_NAME, Arc::new(echo::create_echo_plugin)),
23 |         (
24 |             cms_rate::CMS_RATE_PLUGIN_NAME,
25 |             Arc::new(cms_rate::create_cms_rate_limiter),
26 |         ),
27 |     ];
28 |     arr.into_iter().collect()
29 | });
30 | 
31 | pub fn create_plugin_builder(name: &str, cfg: Option<YamlValue>) -> PluginResult<Box<dyn Plugin>> {
32 |     let builder = PLUGIN_BUILDER_REGISTRY
33 |         .get(name)
34 |         .ok_or(PluginError::UnknownPlugin {
35 |             name: name.to_string(),
36 |         })?;
37 |     builder(cfg)
38 | }
39 | 


--------------------------------------------------------------------------------
/src/proxy/errors.rs:
--------------------------------------------------------------------------------
1 | use snafu::Snafu;
2 | 
3 | #[derive(Debug, Snafu)]
4 | #[snafu(visibility(pub))]
5 | pub enum ProxyErr {
6 |     #[snafu(display("Failed to build matcher: {}", source))]
7 |     BuildMatcher { source: Box<dyn std::error::Error> },
8 | }
9 | 


--------------------------------------------------------------------------------
/src/proxy/mod.rs:
--------------------------------------------------------------------------------
1 | pub mod errors;
2 | pub mod process;
3 | 
4 | pub type ProxyResult<T> = Result<T, errors::ProxyErr>;
5 | pub use process::*;
6 | 


--------------------------------------------------------------------------------
/src/proxy/process.rs:
--------------------------------------------------------------------------------
  1 | use std::borrow::Cow;
  2 | use std::{sync::Arc, time::Duration};
  3 | 
  4 | use async_trait::async_trait;
  5 | use bytes::Bytes;
  6 | use http::StatusCode;
  7 | use log::{error, info, log_enabled, Level};
  8 | use matchit::{InsertError, Router};
  9 | use once_cell::sync::Lazy;
 10 | use pingora::{http::ResponseHeader, prelude::*, proxy::ProxyHttp};
 11 | use regex::Regex;
 12 | 
 13 | use crate::{
 14 |     clusters::ClusterManager,
 15 |     core::plugin::{Plugin, PluginCtx, RouteParams},
 16 |     utils::send_response,
 17 | };
 18 | 
 19 | /// Represents the main proxy structure
 20 | pub struct Proxy {
 21 |     plugins: Vec<Box<dyn Plugin>>,
 22 |     /// Router for matching requests to pipelines
 23 |     matcher: MatchEntry,
 24 |     /// Manager for handling clusters of backends
 25 |     cluster_manager: ClusterManager,
 26 | }
 27 | 
 28 | impl Proxy {
 29 |     /// Creates a new Proxy instance
 30 |     ///
 31 |     /// # Arguments
 32 |     ///
 33 |     /// * `matcher` - The MatchEntry for routing requests
 34 |     /// * `cluster_manager` - The ClusterManager for handling backend clusters
 35 |     pub fn new(
 36 |         matcher: MatchEntry,
 37 |         cluster_manager: ClusterManager,
 38 |         plugins: Vec<Box<dyn Plugin>>,
 39 |     ) -> Self {
 40 |         Self {
 41 |             matcher,
 42 |             cluster_manager,
 43 |             plugins,
 44 |         }
 45 |     }
 46 | }
 47 | 
 48 | static NOT_FOUND: Lazy<Bytes> = Lazy::new(|| Bytes::from("not found"));
 49 | 
 50 | /// Context for the proxy, holding plugins and other request-specific data
 51 | #[derive(Default)]
 52 | pub struct ProxyCtx {
 53 |     /// List of plugins to be applied
 54 |     plugins: Arc<Vec<Box<dyn Plugin>>>,
 55 |     /// The selected cluster for the request
 56 |     cluster: Option<String>,
 57 |     /// Context for plugin execution
 58 |     plugin_ctx: PluginCtx,
 59 | }
 60 | 
 61 | #[async_trait]
 62 | impl ProxyHttp for Proxy {
 63 |     type CTX = ProxyCtx;
 64 | 
 65 |     /// Creates a new context for each request
 66 |     fn new_ctx(&self) -> Self::CTX {
 67 |         Self::CTX::default()
 68 |     }
 69 | 
 70 |     /// Filters incoming requests
 71 |     ///
 72 |     /// This method matches the request to a pipeline, initializes plugins,
 73 |     /// and applies request filters from each plugin.
 74 |     async fn request_filter(&self, session: &mut Session, ctx: &mut Self::CTX) -> Result<bool>
 75 |     where
 76 |         Self::CTX: Send + Sync,
 77 |     {
 78 |         // global plugins
 79 |         for plugin in &self.plugins {
 80 |             let stop = plugin.request_filter(session, &mut ctx.plugin_ctx).await?;
 81 |             if stop {
 82 |                 return Ok(true);
 83 |             }
 84 |         }
 85 | 
 86 |         // Match request to pipeline
 87 |         if let Some((route_params, ppl)) = self.matcher.match_request(session) {
 88 |             ctx.cluster = Some(ppl.cluster.clone());
 89 | 
 90 |             // Initialize plugins
 91 |             ctx.plugins = ppl.plugins.clone();
 92 |             ctx.plugin_ctx.route_params = Some(route_params);
 93 | 
 94 |             // Apply request filters from each plugin
 95 |             for plugin in ctx.plugins.iter() {
 96 |                 let should_stop = plugin.request_filter(session, &mut ctx.plugin_ctx).await?;
 97 |                 if should_stop {
 98 |                     return Ok(true);
 99 |                 }
100 |             }
101 |         } else {
102 |             send_response(
103 |                 session,
104 |                 StatusCode::NOT_FOUND,
105 |                 None,
106 |                 Some(NOT_FOUND.clone()),
107 |                 None,
108 |             )
109 |             .await?;
110 |             return Ok(true);
111 |         }
112 | 
113 |         Ok(false)
114 |     }
115 | 
116 |     /// Filters the request body
117 |     ///
118 |     /// Applies request body filters from each plugin.
119 |     async fn request_body_filter(
120 |         &self,
121 |         session: &mut Session,
122 |         body: &mut Option<Bytes>,
123 |         end_of_stream: bool,
124 |         ctx: &mut Self::CTX,
125 |     ) -> Result<()> {
126 |         // global plugins
127 |         for plugin in &self.plugins {
128 |             plugin
129 |                 .request_body_filter(session, body, end_of_stream, &mut ctx.plugin_ctx)
130 |                 .await?;
131 |         }
132 |         for plugin in ctx.plugins.iter() {
133 |             plugin
134 |                 .request_body_filter(session, body, end_of_stream, &mut ctx.plugin_ctx)
135 |                 .await?;
136 |         }
137 |         Ok(())
138 |     }
139 | 
140 |     /// Filters the upstream request
141 |     ///
142 |     /// Applies upstream request filters from each plugin.
143 |     async fn upstream_request_filter(
144 |         &self,
145 |         session: &mut Session,
146 |         upstream_request: &mut RequestHeader,
147 |         ctx: &mut Self::CTX,
148 |     ) -> Result<()> {
149 |         // global plugins
150 |         for plugin in &self.plugins {
151 |             plugin
152 |                 .upstream_request_filter(session, upstream_request, &mut ctx.plugin_ctx)
153 |                 .await?;
154 |         }
155 |         for plugin in ctx.plugins.iter() {
156 |             plugin
157 |                 .upstream_request_filter(session, upstream_request, &mut ctx.plugin_ctx)
158 |                 .await?;
159 |         }
160 |         Ok(())
161 |     }
162 | 
163 |     /// Filters the response
164 |     ///
165 |     /// Applies response filters from each plugin.
166 |     async fn response_filter(
167 |         &self,
168 |         session: &mut Session,
169 |         upstream_response: &mut ResponseHeader,
170 |         ctx: &mut Self::CTX,
171 |     ) -> Result<()> {
172 |         // global plugins
173 |         for plugin in self.plugins.iter() {
174 |             plugin
175 |                 .response_filter(session, upstream_response, &mut ctx.plugin_ctx)
176 |                 .await?;
177 |         }
178 |         for plugin in ctx.plugins.iter() {
179 |             plugin
180 |                 .response_filter(session, upstream_response, &mut ctx.plugin_ctx)
181 |                 .await?;
182 |         }
183 |         Ok(())
184 |     }
185 | 
186 |     /// Filters the response body
187 |     ///
188 |     /// Applies response body filters from each plugin.
189 |     fn response_body_filter(
190 |         &self,
191 |         session: &mut Session,
192 |         body: &mut Option<Bytes>,
193 |         end_of_stream: bool,
194 |         ctx: &mut Self::CTX,
195 |     ) -> Result<Option<Duration>> {
196 |         // global plugins
197 |         for plugin in self.plugins.iter() {
198 |             plugin.response_body_filter(session, body, end_of_stream, &mut ctx.plugin_ctx)?;
199 |         }
200 |         for plugin in ctx.plugins.iter() {
201 |             plugin.response_body_filter(session, body, end_of_stream, &mut ctx.plugin_ctx)?;
202 |         }
203 |         Ok(None)
204 |     }
205 | 
206 |     /// This filter is called when the entire response is sent to the downstream successfully or
207 |     /// there is a fatal error that terminate the request.
208 |     ///
209 |     /// An error log is already emitted if there is any error. This phase is used for collecting
210 |     /// metrics and sending access logs.
211 |     async fn logging(&self, session: &mut Session, e: Option<&Error>, _ctx: &mut Self::CTX)
212 |     where
213 |         Self::CTX: Send + Sync,
214 |     {
215 |         if log_enabled!(Level::Info) {
216 |             let req = session.req_header();
217 |             let resp = session.response_written();
218 | 
219 |             let status = resp
220 |                 .map_or(StatusCode::INTERNAL_SERVER_ERROR, |r| r.status)
221 |                 .as_u16();
222 |             let body_bytes_sent = session.body_bytes_sent();
223 |             let remote_addr = session
224 |                 .client_addr()
225 |                 .map_or(Cow::Borrowed("-"), |ip| Cow::Owned(ip.to_string()));
226 |             // 使用类似nginx 的格式打日志
227 |             info!(
228 |                 "{} \"{} {}\" {} {}",
229 |                 remote_addr, req.method, req.uri, status, body_bytes_sent
230 |             );
231 |         }
232 |         if let Some(e) = e {
233 |             error!(error:? = e; "Error occurred");
234 |         }
235 |     }
236 | 
237 |     /// Selects an upstream peer for the request
238 |     ///
239 |     /// This method selects a backend from the appropriate cluster for the request.
240 |     async fn upstream_peer(
241 |         &self,
242 |         session: &mut Session,
243 |         ctx: &mut Self::CTX,
244 |     ) -> Result<Box<HttpPeer>> {
245 |         let cluster = ctx
246 |             .cluster
247 |             .as_ref()
248 |             .ok_or(Error::new(ErrorType::Custom("no cluster")))?;
249 |         let lb = self
250 |             .cluster_manager
251 |             .get_cluster(cluster)
252 |             .ok_or(Error::new(ErrorType::ConnectNoRoute))?;
253 |         let backend = lb.select_backend(session.req_header()).ok_or(
254 |             Error::new(ErrorType::Custom("no backend"))
255 |                 .more_context(format!("cluster: {}", cluster)),
256 |         )?;
257 |         Ok(Box::new(HttpPeer::new(backend, false, "a.b.c".to_string())))
258 |     }
259 | }
260 | 
261 | /// Represents a pipeline of plugins for a specific route
262 | pub struct Pipeline {
263 |     /// List of plugin builders for this pipeline
264 |     plugins: Arc<Vec<Box<dyn Plugin>>>,
265 |     /// The cluster associated with this pipeline
266 |     cluster: String,
267 | }
268 | 
269 | impl Pipeline {
270 |     /// Creates a new Pipeline instance
271 |     pub fn new(plugins: Arc<Vec<Box<dyn Plugin>>>, cluster: String) -> Self {
272 |         Self { plugins, cluster }
273 |     }
274 | }
275 | 
276 | /// Struct for matching requests to pipelines
277 | pub struct MatchEntry {
278 |     /// Router for non-regex URI matching
279 |     non_reg_uri: Router<Arc<Pipeline>>,
280 |     /// Vector of regex patterns and associated pipelines
281 |     regex_uris: Vec<(Regex, Arc<Pipeline>)>,
282 | }
283 | 
284 | impl MatchEntry {
285 |     /// Creates a new MatchEntry instance
286 |     pub fn new() -> Self {
287 |         Self {
288 |             non_reg_uri: Router::new(),
289 |             regex_uris: vec![],
290 |         }
291 |     }
292 | 
293 |     /// Inserts a new route into the non-regex router
294 |     pub fn insert_route(&mut self, path: &str, ppl: Arc<Pipeline>) -> Result<(), InsertError> {
295 |         if self.non_reg_uri.at(path).is_ok() {
296 |             return Ok(());
297 |         }
298 |         self.non_reg_uri.insert(path, ppl)
299 |     }
300 | 
301 |     /// Adds a new regex route
302 |     pub fn add_regex_route(&mut self, re: Regex, ppl: Arc<Pipeline>) {
303 |         self.regex_uris.push((re, ppl));
304 |     }
305 | 
306 |     /// Matches a request to a pipeline
307 |     fn match_request(&self, session: &mut Session) -> Option<(RouteParams, Arc<Pipeline>)> {
308 |         let uri = session.req_header().uri.path();
309 |         if let Ok(ppl) = self.non_reg_uri.at(uri) {
310 |             return Some((RouteParams::new_params(&ppl.params), ppl.value.clone()));
311 |         }
312 | 
313 |         for (re, ppl) in self.regex_uris.iter() {
314 |             if let Some(caps) = re.captures(uri) {
315 |                 return Some((RouteParams::new_caps(&caps), ppl.clone()));
316 |             }
317 |         }
318 |         None
319 |     }
320 | }
321 | 
322 | impl Default for MatchEntry {
323 |     fn default() -> Self {
324 |         Self::new()
325 |     }
326 | }
327 | 


--------------------------------------------------------------------------------
/src/utils/mod.rs:
--------------------------------------------------------------------------------
 1 | use std::collections::HashMap;
 2 | 
 3 | use bytes::Bytes;
 4 | use http::{header, Response, StatusCode};
 5 | use pingora::{http::ResponseHeader, prelude::*};
 6 | 
 7 | pub async fn send_response(
 8 |     session: &mut Session,
 9 |     status: StatusCode,
10 |     content_type: Option<&'static str>,
11 |     body: Option<Bytes>,
12 |     headers: Option<HashMap<String, String>>,
13 | ) -> Result<()> {
14 |     let cl = body.as_ref().map(|b| b.len()).unwrap_or(0);
15 |     let mut bd = Response::builder()
16 |         .status(status)
17 |         .header(header::CONTENT_LENGTH, cl);
18 |     if let Some(headers) = headers {
19 |         for (key, value) in headers {
20 |             bd = bd.header(key, value);
21 |         }
22 |     }
23 |     if let Some(content_type) = content_type {
24 |         bd = bd.header(header::CONTENT_TYPE, content_type);
25 |     } else {
26 |         bd = bd.header(header::CONTENT_TYPE, "text/plain");
27 |     }
28 | 
29 |     if let Some(body) = body {
30 |         let resp = bd.body(body).unwrap();
31 |         let (parts, body) = resp.into_parts();
32 |         let resp_header: ResponseHeader = parts.into();
33 |         session
34 |             .write_response_header(Box::new(resp_header), false)
35 |             .await?;
36 |         session.write_response_body(Some(body), true).await
37 |     } else {
38 |         let resp = bd.body(()).unwrap();
39 |         let (parts, _) = resp.into_parts();
40 |         let resp_header: ResponseHeader = parts.into();
41 |         session
42 |             .write_response_header(Box::new(resp_header), false)
43 |             .await?;
44 |         session.write_response_body(None, true).await
45 |     }
46 | }
47 | 


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