[GitHub] [apisix-java-plugin-runner] beginnerWJC commented on issue #191: bug: When using the APISIX ext-plugin-post-resp plugin and apisix java plugin runner 0.3.0 to rewrite the upstream response header, when the upstream return status code is 204, this HTTP request apisix will be sent twice

Mon, 29 Aug 2022 19:11:13 -0700 


beginnerWJC commented on issue #191:
URL: 
https://github.com/apache/apisix-java-plugin-runner/issues/191#issuecomment-1231059247

   我还发现了个问题，我想在插件里面将返回值改成200规避这个问题，然后发现无法修改响应码
   插件代码：
   ```
   public void postFilter(PostRequest request, PostResponse response, 
PluginFilterChain chain) {
                logger.info("TestPostFilter插件开始执行！");
                Map<String, String> headersMap = request.getUpstreamHeaders();
                logger.info("上游返回的headers:{}",JSON.toJSONString(headersMap));
                int statusCode = request.getUpstreamStatusCode();
                logger.info("上游返回的状态码为:{}",statusCode);
                if(statusCode == 204) {
                        logger.info("修改上游的状态码为200");
                        response.setStatusCode(200);
                }
                response.setHeader("apisix", "TestPostFilter");
                chain.postFilter(request, response);
       }
   ```
   日志打印
   ```
   2022/08/30 01:36:25 [warn] 58#58: *194 [lua] init.lua:913: 08/30 
01:36:25.794 [epollEventLoopGroup-2-2] INFO  
[o.a.a.p.runner.filter.TestPostFilter] -TestPostFilter插件开始执行！
   , context: ngx.timer
   2022/08/30 01:36:25 [warn] 58#58: *194 [lua] init.lua:913: 08/30 
01:36:25.794 [epollEventLoopGroup-2-2] INFO  
[o.a.a.p.runner.filter.TestPostFilter] -上游返回的headers:{"Date":"Tue, 30 Aug 2022 
01:36:25 GMT"}
   , context: ngx.timer
   2022/08/30 01:36:25 [warn] 58#58: *194 [lua] init.lua:913: 08/30 
01:36:25.795 [epollEventLoopGroup-2-2] INFO  
[o.a.a.p.runner.filter.TestPostFilter] -上游返回的状态码为:204
   , context: ngx.timer
   2022/08/30 01:36:25 [warn] 58#58: *194 [lua] init.lua:913: 08/30 
01:36:25.795 [epollEventLoopGroup-2-2] INFO  
[o.a.a.p.runner.filter.TestPostFilter] -修改上游的状态码为200
   , context: ngx.timer
   172.17.67.1 - - [30/Aug/2022:01:36:25 +0000] 192.168.40.174:30880 "GET 
/robot-monitor/v1/robotMonitor/test204 HTTP/1.1" 204 0 0.205 "-" 
"PostmanRuntime/7.28.4" 192.168.2.120:8900 204 0.007 
"http://192.168.40.174:30880";
   ```
   postman:
   
![image](https://user-images.githubusercontent.com/37164104/187328848-a95f4f45-6c05-4a9a-8226-7473ef214d22.png)
   还是204，没有改写成功
   


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