Apache HttpClient（各版本） POST 请求302问题解决！

﹏ヽ暗。殇╰゛Y 2021-06-22 15:37 615阅读 0赞

问题背景：POST请求返回302，导致获取不了数据。

HttpClient instance = HttpClientBuilder.create().build();
        HttpResponse response = instance.execute(new HttpPost("http://t.co/I5YYd9tddw"));
        assertThat(response.getStatusLine().getStatusCode(), equalTo(301));

HttpClient 4.3以后的版本

HttpClient instance = 
          HttpClientBuilder.create().setRedirectStrategy(new LaxRedirectStrategy()).build();
        HttpResponse response = instance.execute(new HttpPost("http://t.co/I5YYd9tddw"));
        assertThat(response.getStatusLine().getStatusCode(), equalTo(200));

HttpClient 4.2版本

DefaultHttpClient client = new DefaultHttpClient();
        client.setRedirectStrategy(new LaxRedirectStrategy());
     
        HttpResponse response = client.execute(new HttpPost("http://t.co/I5YYd9tddw"));
        assertThat(response.getStatusLine().getStatusCode(), equalTo(200));

HttpClient 4.2之前的版本

DefaultHttpClient client = new DefaultHttpClient();
        client.setRedirectStrategy(new DefaultRedirectStrategy() {
            /** Redirectable methods. */
            private String[] REDIRECT_METHODS = new String[] { 
                HttpGet.METHOD_NAME, HttpPost.METHOD_NAME, HttpHead.METHOD_NAME 
            };
     
            @Override
            protected boolean isRedirectable(String method) {
                for (String m : REDIRECT_METHODS) {
                    if (m.equalsIgnoreCase(method)) {
                        return true;
                    }
                }
                return false;
            }
        });
     
        HttpResponse response = client.execute(new HttpPost("http://t.co/I5YYd9tddw"));
        assertThat(response.getStatusLine().getStatusCode(), equalTo(200));

本人使用的是4.4版本，方法1亲测有效。网上比较多的是方法3的版本，还有的说是获取302返回的location再去请求，太麻烦了。  
如果大家试了满意的留言哈，大家一起分享。