java hppt ClientProtocolException invalid http response

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JAVA通过URL调用第三方接口返回ClientProtocolException或者invalid http response

本人与第三方华为ocx控件对接，后台使用http工具类调用华为接口,获取坐席状态，如(http://ip:port//method?methodname\=getSkillsAgentlist&param\=1)，此工具为HttpClientPostUtil，项目中都是用这个工具类来调用第三方URL接口获取返回数据的。这两天遇到一个很奇怪的问题，调用其它URL接口正常，调用此华为接口要么报ClientProtocolException异常，要么invalid http response。网上查阅资料，解决方案是头部增加USER_AGENT设置，或者自定义类，当接口返回错误头部信息也正常返回。自己本身也通过更换工具类或者用post或get请求，都无功而返。用URL抓包工具时，弹出协议出入警告，但是可以正常获取返回数据。如在IE浏览器直接访问URL地址，可正常看到返回数据，Chrome浏览器返err_invalid_http_response。排查一天之后，定位代码没有问题，之后排查服务器环境，也没有问题。通过查看log日志后，发现接口返回数据无Header信息，协调第三方增加协议头部信息，问题解决。

工具类代码如下

package cn.sh.ideal.util;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.apache.commons.lang.StringUtils;import org.apache.http.HttpEntity;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.apache.log4j.Logger;public class HttpClientPostUtil{    private static Logger log=Logger.getLogger(HttpClientPostUtil.class);    public HttpClientPostUtil(){        super();    }    /**     * post方法     * @param url http请求url连接地址和url传参     * @param 表单传参     */    public static String postMapParams(String url,Map<String, String> parammap){        String body = null;        HttpPost post = null;        CloseableHttpResponse httpresponse = null;        CloseableHttpClient client = HttpClients.createDefault();        try {              //连接时间20s            //数据传输时间60s            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(60000).setConnectTimeout(20000).build();            if(StringUtils.isBlank(url) || !url.startsWith("http")){                 log.error("请求地址格式不对:"+url);                 return body;              }            post = new HttpPost(url);            //设置超时            post.setConfig(requestConfig);            //创建表单参数            if(parammap!=null&&parammap.size()>0){                List<NameValuePair> formparams = new ArrayList<NameValuePair>();                  for(String key:parammap.keySet()){                    formparams.add(new BasicNameValuePair(key, parammap.get(key)));                  }                UrlEncodedFormEntity uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");                  post.setEntity(uefEntity);              }                      // 发送请求            httpresponse = client.execute(post);                int statusCode = httpresponse.getStatusLine().getStatusCode();                if (HttpStatus.SC_OK == statusCode) {                    // 获取返回数据                    HttpEntity entity = httpresponse.getEntity();                    body = EntityUtils.toString(entity);                    EntityUtils.consume(entity);                } else{                    log.error("http请求状态码:"+statusCode);                }                httpresponse.close();            } catch (Exception e) {                 log.error("http请求失败:"+url);                log.error(e);            }finally {                if(httpresponse!=null){                    try {                        httpresponse.close();                    } catch (IOException e) {                        log.error(e);                    }                }                if(post!=null&&!post.isAborted()){                    post.releaseConnection();                }                if(client!=null){                    try {                        client.close();                    } catch (IOException e) {                        log.error(e);                    }                }            }            return body;    }    /**     * post方法     * @param url http请求url连接地址     * @param json传参     */    public static String postJsonParams(String url,String parammap){        String body = null;        HttpPost post = null;        CloseableHttpResponse httpresponse = null;        CloseableHttpClient client = HttpClients.createDefault();        String encoderJson = "";        try {            if(parammap != null && !"".equals(parammap))                encoderJson = URLEncoder.encode(parammap, "UTF-8");        } catch (UnsupportedEncodingException e1) {             log.error(e1);        }        try {              //连接时间20s            //数据传输时间60s            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(60000).setConnectTimeout(20000).build();            if(StringUtils.isBlank(url) || !url.startsWith("http")){                 log.error("请求地址格式不对:"+url);                 return body;              }            post = new HttpPost(url);            //设置超时            post.setConfig(requestConfig);            post.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Win64; x64; Trident/4.0; .NET CLR 2.0.50727; SLCC2; .NET4.0C; .NET4.0E)");            post.setHeader("Content-type","text/html;charset=utf-8");              post.setHeader("Accept", "*/*");            post.setHeader("Accept-Encoding", "gzip, deflate");            post.setHeader("Accept-Language", "zh-CN");            post.setEntity(new StringEntity(encoderJson));             // 发送请求            httpresponse = client.execute(post);            int statusCode = httpresponse.getStatusLine().getStatusCode();            if (HttpStatus.SC_OK == statusCode) {                // 获取返回数据                HttpEntity entity = httpresponse.getEntity();                body = EntityUtils.toString(entity);                EntityUtils.consume(entity);            } else{                log.error("http请求状态码:"+statusCode);            }            httpresponse.close();            } catch (Exception e) {                 log.error("http请求失败:"+url);                log.error(e);            }finally {                if(httpresponse!=null){                    try {                        httpresponse.close();                    } catch (IOException e) {                        log.error(e);                    }                }                if(post!=null&&!post.isAborted()){                    post.releaseConnection();                }                if(client!=null){                    try {                        client.close();                    } catch (IOException e) {                        log.error(e);                    }                }            }            return body;    }}

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