[GitHub] [apisix-ingress-controller] SRCchen commented on issue #1004: request help: 关于对wasm的支持

[GitBox <gi...@apache.org>]

SRCchen commented on issue #1004:
URL: https://github.com/apache/apisix-ingress-controller/issues/1004#issuecomment-1120558391

   `proxy_wasm_rust_sdk` version: 0.2
   
   cargo.toml
   ```toml
   [package]
   name = "wasmdemo"
   version = "0.1.0"
   edition = "2021"
   
   [lib]
   path = "src/lib.rs"
   crate-type = ["cdylib"]
   
   
   [dependencies]
   log = "0.4"
   proxy-wasm = "0.2"
   ```
   
   example code:
   ```rust
   use log::trace;
   use proxy_wasm::traits::*;
   use proxy_wasm::types::*;
   use std::time::Duration;
   
   proxy_wasm::main! {{
       proxy_wasm::set_log_level(LogLevel::Trace);
       proxy_wasm::set_http_context(|_, _| -> Box<dyn HttpContext> { Box::new(HttpAuthRandom) });
   }}
   
   struct HttpAuthRandom;
   
   impl HttpContext for HttpAuthRandom {
       fn on_http_request_headers(&mut self, _: usize, _: bool) -> Action {
           self.dispatch_http_call(
               "httpbin",
               vec![
                   (":method", "GET"),
                   (":path", "/bytes/1"),
                   (":authority", "httpbin.org"),
               ],
               None,
               vec![],
               Duration::from_secs(5),
           )
           .unwrap();
           Action::Pause
       }
   
       fn on_http_response_headers(&mut self, _: usize, _: bool) -> Action {
           self.set_http_response_header("Powered-By", Some("proxy-wasm"));
           Action::Continue
       }
   }
   
   impl Context for HttpAuthRandom {
       fn on_http_call_response(&mut self, _: u32, _: usize, body_size: usize, _: usize) {
           if let Some(body) = self.get_http_call_response_body(0, body_size) {
               if !body.is_empty() && body[0] % 2 == 0 {
                   trace!("Access granted.");
                   self.resume_http_request();
                   return;
               }
           }
           trace!("Access forbidden.");
           self.send_http_response(
               403,
               vec![("Powered-By", "proxy-wasm")],
               Some(b"Access forbidden.\n"),
           );
       }
   }
   ```


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