如何禁用来自 apache httpclient 4 的默认请求标头? [英] How can I disable default request headers from apache httpclient 4?

问题描述

我正在使用 apache common httpclient 4.3.3 来发出 http 1.0 请求.这是我提出请求的方式

I am using apache common httpclient 4.3.3 to make http 1.0 request. Here is how I make the request

HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost(url);
post.setProtocolVersion(new ProtocolVersion("HTTP", 1, 0));

 // trying to remove default headers but it doesn't work
post.removeHeaders("User-Agent");
post.removeHeaders("Accept-Encoding");
post.removeHeaders("Connection");

post.setEntity(new ByteArrayEntity(ba) );

HttpResponse response = client.execute(post);

但是，我可以看到还有其他标头自动添加到我对服务器的请求中，例如

However, i can see that there are other headers automatically added to my request to the server like

Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.3.3 (java 1.5)
Accept-Encoding: gzip,deflate

如何告诉 httpclient 不包含任何其他标头?我试图用 post.removeHeaders(xxxx) 删除那些标题，但它不起作用.你能告诉我怎么做吗?

How can I tell httpclient not to include any other headers? I tried to removed those headers with post.removeHeaders(xxxx) but it doesn't work. Can you show me how?

谢谢，

推荐答案

如果您调用 HttpClientBuilder.create()，您将拥有一个 httpClientBuilder.并且 httpClientBuilder 有很多默认标头的配置，这将用于制作拦截器(例如:RequestAcceptEncoding).

If you call HttpClientBuilder.create(), you will have a httpClientBuilder. And httpClientBuilder has a lot config for default headers and this will be used to make intercepters( ex: RequestAcceptEncoding ).

例如，实现 HttpRequestInterceptor 的 RequestAcceptEncoding 会在调用 HttpProcessor.process() 时生成 Accept-Encoding: gzip,deflate 标头.并且 httpProcessor.process() 将在调用之前被调用final CloseableHttpResponse response = this.requestExecutor.execute(route, request, context, execAware);

For example, RequestAcceptEncoding, which implements HttpRequestInterceptor, makes Accept-Encoding: gzip,deflate header when HttpProcessor.process() is invoked. And httpProcessor.process() will be invoked just before invoking final CloseableHttpResponse response = this.requestExecutor.execute(route, request, context, execAware);

您可以在 httpclient-4.3.6 第 193 行的 org.apache.http.impl.execchain.ProtocolExec 看到此代码.

You can see this code at org.apache.http.impl.execchain.ProtocolExec of httpclient-4.3.6 line 193.

如果你想删除 Accept-Encoding: gzip,deflate，调用 HttpClientBuilder.disableContentCompression() 如下.

If you want to remove Accept-Encoding: gzip,deflate, call HttpClientBuilder.disableContentCompression() like below.

HttpClient client = HttpClientBuilder.create().disableContentCompression().build();

简而言之，HttpClientBuilder 有很多标志来禁用/启用 HttpRequestInterceptor.如果禁用/启用那些 HttpRequestInterceptor，则可以排除/包含默认标头.

In short, HttpClientBuilder has a lot of flags to disable/enable HttpRequestInterceptor. If you disable/enable those HttpRequestInterceptor, you can exclude/include default headers.

抱歉我的英语不好，希望你明白我的意思.

Sorry for my poor English, and hope you get what I mean.

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