如何防止apache http客户端跟随重定向

Question

我正在使用apache http客户端连接到远程服务器.远程服务器发送重定向,我想实现我的客户端不自动跟随重定向,以便我可以提取propper标头并做我想要的目标.

我正在寻找一个简单的工作代码示例(复制粘贴),停止自动重定向跟随行为.

我发现防止HttpClient 4跟随重定向,但似乎我太愚蠢了用HttpClient 4.0(GA)实现它

Answer 1

由于macbirdie,魔术是:

params.setParameter("http.protocol.handle-redirects",false);

省略了进口,这是一个复制粘贴样本:

HttpClient httpclient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();

// HTTP parameters stores header etc.
HttpParams params = new BasicHttpParams();
params.setParameter("http.protocol.handle-redirects",false);

// Create a local instance of cookie store
CookieStore cookieStore = new BasicCookieStore();

// Bind custom cookie store to the local context
localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);

// connect and receive 
HttpGet httpget = new HttpGet("http://localhost/web/redirect");
httpget.setParams(params);
response = httpclient.execute(httpget, localContext);

// obtain redirect target
Header locationHeader = response.getFirstHeader("location");
if (locationHeader != null) {
    redirectLocation = locationHeader.getValue();
  System.out.println("loaction: " + redirectLocation);
} else {
  // The response is invalid and did not provide the new location for
  // the resource.  Report an error or possibly handle the response
  // like a 404 Not Found error.
}

Answer 2

这对我有用:

HttpGet httpGet = new HttpGet("www.google.com");
HttpParams params = httpGet.getParams();
params.setParameter(ClientPNames.HANDLE_REDIRECTS, Boolean.FALSE);
httpGet.setParams(params);

Answer 3

使用HttpClient 4.3和Fluent:

final String url = "http://...";
final HttpClient client = HttpClientBuilder.create()
    .disableRedirectHandling()
    .build();
final Executor executor = Executor.newInstance(client);
final HttpResponse response = executor.execute(Request.Get(url))
    .returnResponse();

Answer 4

默认HttpClient实现在可配置性方面非常有限,但您可以使用HttpClient的布尔参数来控制重定向处理http.protocol.handle-redirects.

请参阅文档以供参考.

Answer 5

而不是直接使用该属性,您可以使用:

final HttpParams params = new BasicHttpParams();
HttpClientParams.setRedirecting(params, false);