HttpCLient请求困扰了两天的问题

来源：互联网发布：天河工商局软件地址编辑：程序博客网时间：2024/04/29 12:53

**问题起因是测试过程中部署到阿里云服务器，通过vpn访问内网前置机发送查询报文，出现了消息无返回结果的情况**

写个小程序放在阿里云服务器充当客户端，服务端测试程序放在内网服务器上，双方分别打印日志观察消息传递情况
客户端小程序照搬了项目中发送httpclient请求的代码
服务端最初用socket模拟了接收http请求并返回信息
自己的小程序发送，响应并未出现类似状况
将客户端改成访问前置机，返回结果的频率并无任何规律，有时候有结果有时候是空字符串
修改了客户端程序，在服务端直接用controller接收http请求，然后返回结果，当然，在此期间遇见了数不清的梗儿，比如Controller要不被安全框架拦截，并且为了让项目中返回xml折腾了很久，终于发现直接请求到controller返回字符串也好，xml也好都没结果，百思不得其解了
突然发现某博客httpclient请求与我们的代码稍有差池（便是这一行：byte[] bytes = new byte[1024];）
改成这样，效果杠杠滴

客户端代码

package com.test.vpn;import java.io.BufferedInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpStatus;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.methods.StringRequestEntity;import org.apache.log4j.Logger;import org.apache.log4j.xml.DOMConfigurator;public class TestClient {    public static final Logger logger = Logger.getLogger(TestClient.class);    public static String connectionExceptionString = "<?xml version=\"1.0\" encoding=\"GBK\"?><stream><status>TIMEOUT</status><statusText>服务器访问出错</statusText><list name=\"userDataList\"><row><status>AAAAAAA</status><statusText>交易成功</statusText><stt>0</stt></row></list></stream>";    static {           DOMConfigurator.configure(System.getProperty("user.dir") + File.separator + "conf" + File.separator                   + "log4j.xml");       }    public static String post(String url, String xmlInfo, String charset) {        // 关闭        System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.SimpleLog");        System.setProperty("org.apache.commons.logging.simplelog.showdatetime", "true");        System.setProperty("org.apache.commons.logging.simplelog.log.org.apache.commons.httpclient","stdout");        // 创建httpclient工具对象        HttpClient client = new HttpClient();        // 创建post请求方法        PostMethod myPost = new PostMethod(url);        // 设置请求超时时间        client.getHttpConnectionManager().getParams().setConnectionTimeout(300 * 1000);        String responseString = null;        try {            // 设置请求头部类型            myPost.setRequestHeader("Content-Type", "text/xml");            myPost.setRequestHeader("charset", charset);            // 设置请求体，即xml文本内容，注：这里写了两种方式，一种是直接获取xml内容字符串，一种是读取xml文件以流的形式            myPost.setRequestEntity(new StringRequestEntity(xmlInfo, "text/xml", charset));            //myPost.setRequestEntity(new StringRequestEntity(xmlString,"text/xml","utf-8"));            int statusCode = client.executeMethod(myPost);            try {                Thread.sleep(1);            } catch (InterruptedException e) {                e.printStackTrace();            }            System.out.println(statusCode);            if (statusCode == HttpStatus.SC_OK) {                BufferedInputStream bis = new BufferedInputStream(myPost.getResponseBodyAsStream());                byte[] bytes = new byte[1024];//              byte[] bytes = new byte[bis.available()];                ByteArrayOutputStream bos = new ByteArrayOutputStream();                int count = 0;                while ((count = bis.read(bytes)) != -1) {                    if(count == 0){                        break ;                    }                    bos.write(bytes, 0, count);                }                byte[] strByte = bos.toByteArray();                responseString = new String(strByte, 0, strByte.length, charset);                logger.info("返回结果："+responseString);                bos.close();                bis.close();            }        }catch (Exception e) {            logger.info("",e);            return connectionExceptionString;        }finally{            if(myPost != null) myPost.releaseConnection();        }        return responseString;    }    public static void main(String[] args) {        for(int i=0; i<100; i++){            logger.info("第"+i+"次");            StringBuffer sb = new StringBuffer();            sb.append("<?xml version=\"1.0\" encoding=\"GBK\"?>");            sb.append("<stream><action>DLSBALQR</action><userName>XXX</userName><accountNo>11</accountNo><subAccNo>010</subAccNo></stream>");            logger.info("发送内容"+sb.toString());            TestClient.post("http://192.168.0.100:8080/v2/appTestVpn/testVpn.app", sb.toString(), "GBK");            try {                Thread.sleep(1000);            } catch (InterruptedException e) {                e.printStackTrace();            }        }    }}

阅读全文

0 0