获取 HTTP/1.1 400 错误请求

Posted 2023-03-16

【中文标题】获取 HTTP/1.1 400 错误请求

【英文标题】：getting HTTP/1.1 400 Bad Request

【发布时间】：2017-12-22 14:14:20

【问题描述】：

这是我的代码。我收到 HTTP/1.1 400 错误请求。不知道我这里是不是做错了什么。

try 
                //client = new DefaultHttpClient();
                client=HttpClientBuilder.create().build();
                get = new HttpGet(queryURL.toString());
                HttpResponse response = client.execute(get);
                if(HttpStatus.SC_OK!=response.getStatusLine().getStatusCode()) 
                    throw new ServiceException(this, response.getStatusLine().getStatusCode()+"", response.getStatusLine().toString());
                
                BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
                StringBuffer json = new StringBuffer();
                String line = "";
                while ((line = rd.readLine()) != null) 
                    json.append(line);
                

错误信息。

ServiceException: HTTP/1.1 400 错误请求

【问题讨论】：

也许你应该检查请求中使用的queryURL。

检查设置'Content-Type'

【参考方案1】：

要找出Bad Request 的原因，首先您应该看到响应文本。可以这样写：

client=HttpClientBuilder.create().build();
get = new HttpGet(queryURL.toString());
HttpResponse response = client.execute(get);

 BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
            StringBuilder responseAsString = new StringBuilder();
            String line = "";
            while ((line = rd.readLine()) != null) 
                responseAsString.append(line);
            

if(HttpStatus.SC_OK!=response.getStatusLine().getStatusCode()) 
      throw new ServiceException(this, response.getStatusLine().getStatusCode()+"", response.getStatusLine().toString() + ", cause: " + responseAsString);