Java - DefaultHttpClient和"Host"头[Apache HttpComponent]

Question

我通过DefaultHttpClient提交多个HTTP请求.问题是从未在请求​​中设置"主机"标头.例如,通过执行以下GET请求:

HttpUriRequest request = new HttpGet("http://www.myapp.com");
org.apache.http.client.HttpClient client = new DefaultHttpClient();
HttpResponse httpResponse = client.execute(request);

生成的请求对象不会使用以下值设置必需的"主机"标头:

Host: myapp.com

有小费吗？

Answer 1

我的错.实际上,DefaultHttpClientdo会Host根据HTTP规范的要求添加标头.

我的问题是由于我之前添加的其他自定义标题,其值以" \r\n" 结尾.这使自动添加的所有后续标头无效DefaultHttpClient.我做了类似的事情:

HttpUriRequest request = new HttpGet("http://www.myapp.com");
org.apache.http.client.HttpClient client = new DefaultHttpClient();
request.addHeader(new BasicHeader("X-Custom-Header", "Some Value\r\n");
HttpResponse httpResponse = client.execute(request);

在HTTP请求中生成以下标头序列:

GET /index.html HTTP/1.1
X-Custom-Header: Some value

Host: www.example.com

标题之间的空格X-Custom-Header和Host无效Host标题.修正:

HttpUriRequest request = new HttpGet("http://www.myapp.com");
org.apache.http.client.HttpClient client = new DefaultHttpClient();
request.addHeader(new BasicHeader("X-Custom-Header", "Some Value");
HttpResponse httpResponse = client.execute(request);

这会产生:

GET /index.html HTTP/1.1
X-Custom-Header: Some value
Host: www.example.com