《转》HttpURLConnection 自动重试机制

       /** Parse the first line of the HTTP request.  It usually looks           something like: "HTTP/1.0 <number> comment\r\n". */          public boolean parseHTTP(MessageHeader responses, ProgressSource pi, HttpURLConnection httpuc)       throws IOException {           /* If "HTTP/*" is found in the beginning, return true.  Let            * HttpURLConnection parse the mime header itself.            *            * If this isn't valid HTTP, then we don't try to parse a header            * out of the beginning of the response into the responses,            * and instead just queue up the output stream to it's very beginning.            * This seems most reasonable, and is what the NN browser does.            */              try {               serverInput = serverSocket.getInputStream();               if (capture != null) {                   serverInput = new HttpCaptureInputStream(serverInput, capture);               }               serverInput = new BufferedInputStream(serverInput);               return (parseHTTPHeader(responses, pi, httpuc));           } catch (SocketTimeoutException stex) {               // We don't want to retry the request when the app. sets a timeout               // but don't close the server if timeout while waiting for 100-continue               if (ignoreContinue) {                   closeServer();               }               throw stex;           } catch (IOException e) {               closeServer();               cachedHttpClient = false;               if (!failedOnce && requests != null) {                   failedOnce = true;                   if (httpuc.getRequestMethod().equals("POST") && (!retryPostProp || streaming)) {                       // do not retry the request                   }  else {                       // try once more                       openServer();                       if (needsTunneling()) {                           httpuc.doTunneling();                       }                       afterConnect();                       writeRequests(requests, poster);                       return parseHTTP(responses, pi, httpuc);                   }               }               throw e;           }          }