Apache HttpClient：如何与CONNECT请求一起发送标头

Question

我需要连接到读取CONNECT请求中标头的代理。我的意思是指在切换到HTTPS加密流之前，特别是与CONNECT一起传递的标头。

HttpClient可以吗？其默认行为似乎是通过加密流推送所有标头。

Answer 1

我不知道你应该做这个（我个人没有看到添加自定义标头的连接请求正当理由），但是这是怎么了，这可能与做的HttpClient 4.3或更新版本

class MyHttpClientBuilder extends HttpClientBuilder { 

    @Override 
    protected ClientExecChain createMainExec(
      final HttpRequestExecutor requestExec, 
      final HttpClientConnectionManager connManager, 
      final ConnectionReuseStrategy reuseStrategy, 
      final ConnectionKeepAliveStrategy keepAliveStrategy, 
      final HttpProcessor proxyHttpProcessor, 
      final AuthenticationStrategy targetAuthStrategy, 
      final AuthenticationStrategy proxyAuthStrategy, 
      final UserTokenHandler userTokenHandler) { 

     final HttpProcessor myProxyHttpProcessor = new ImmutableHttpProcessor(new RequestTargetHost(), new HttpRequestInterceptor() { 
      @Override 
      public void process(HttpRequest request, HttpContext context) throws HttpException, IOException { 
       request.addHeader("Hello", "Mom says hi"); 
      } 
     }); 

     return super.createMainExec(requestExec, connManager, reuseStrategy, keepAliveStrategy, 
       myProxyHttpProcessor, targetAuthStrategy, proxyAuthStrategy, userTokenHandler); 
    } 
} 

HttpClientBuilder httpClientBuilder = new MyHttpClientBuilder(); 
CloseableHttpClient client = MyHttpClientBuilder.build();