HttpClient接入腾讯云api，Post请求Header与body无效。

LunaticTian 2018-04-22 03:19:06

最近在和同学一起写一个小Test，其中有一环是要求接入腾讯云的orc的服务。在用HttpClient，不管任何修改Header还是body，返回一直是{"code":3,"message":"invalid request: parsing error - check content-type and body","data":{}}，就算修改Header，body还是一样，代码在最下方。
但是用postman就会返回正确的JSON，如下图：



public void dome() throws Exception {



		CloseableHttpClient httpClient = HttpClients.createDefault();



		String entityStr = null;

		CloseableHttpResponse response = null;



		try {



			// 创建POST请求对象

			HttpPost httpPost = new HttpPost("http://recognition.image.myqcloud.com/ocr/handwriting");



			/*

			 * 添加请求参数

			 */

			// 创建请求参数

			List<NameValuePair> list = new LinkedList<>();

			BasicNameValuePair param1 = new BasicNameValuePair("appid", "125220938");

			BasicNameValuePair param2 = new BasicNameValuePair("bucket", "");

			BasicNameValuePair param3 = new BasicNameValuePair("url",

					"http://oi4ty6vxc.bkt.clouddn.com/wangyiyunLOGE.png");

			list.add(param1);

			list.add(param2);

			list.add(param3);

			// 使用URL实体转换工具

			UrlEncodedFormEntity entityParam = new UrlEncodedFormEntity(list, "UTF-8");

			httpPost.setEntity(entityParam);



			/*

			 * 添加请求头信息

			 */

			httpPost.addHeader("host", "recognition.image.myqcloud.com");

			httpPost.addHeader("Content-Type", "application/json");

			httpPost.addHeader("authorization",

					"gekuLE8u+p+J7jHadlYhyJhgCyNhPTEyNTIyMDkzO"

							+ "DEmYj1maWxlJms9QUtJRGM4VGNhTnZVbGJMdUlZeVVDaTNDU2drZEtxUDJmM"

							+ "E5kJmU9MTUyNjk2NTA1OSZ0PTE1MjQJnU9MCZmPQ== ");

			// 执行请求

			response = httpClient.execute(httpPost);

			// 获得响应的实体对象

			HttpEntity entity = response.getEntity();

			// 使用Apache提供的工具类进行转换成字符串

			entityStr = EntityUtils.toString(entity, "UTF-8");



			// System.out.println(Arrays.toString(response.getAllHeaders()));



		} catch (ClientProtocolException e) {

			System.err.println("Http协议出现问题");

			e.printStackTrace();

		} catch (IOException e) {

			System.err.println("IO异常");

			e.printStackTrace();

		} finally {

			// 释放连接

			if (null != response) {

				try {

					response.close();

					httpClient.close();

				} catch (IOException e) {

					System.err.println("释放连接出错");

					e.printStackTrace();

				}

			}

		}



		// 打印响应内容

		System.out.println(entityStr);

	}