Java HTTP协议收发MQ 消息代码实例详解

作者：落叶字体：[增加减小] 来源：互联网时间：2017-05-28

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1. 准备环境

在工程 POM 文件添加 HTTP Java 客户端的依赖。

<dependency>
  <groupId>org.eclipse.jetty</groupId>
  <artifactId>jetty-client</artifactId>
  <version>9.3.4.RC1</version>
 </dependency>  
 <dependency>
  <groupId>com.aliyun.openservices</groupId>
  <artifactId>ons-client</artifactId>
  <version>1.1.11</version>
 </dependency>

</div>

2. 运行代码配置（user.properties）

您需要设置配置文件(user.properties)的相关内容，具体请参考申请 MQ 资源。

#您在控制台创建的Topic
Topic=xxx
#公测url
URL=http://publictest-rest.ons.aliyun.com
#阿里云身份验证码
Ak=xxx
#阿里云身份验证密钥
Sk=xxx
#MQ控制台创建的Producer ID
ProducerID=xxx
#MQ控制台创建的Consumer ID
ConsumerID=xxx

</div>

说明：URL 中的 Key，Tag以及 POST Content-Type 没有任何的限制，只要确保Key 和 Tag 相同唯一即可，可以放在 user.properties 里面。

3. HTTP 发送消息示例代码

您可以按以下说明设置相应参数并测试 HTTP 消息发送功能。

package com.aliyun.openservice.ons.http.demo;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.Properties;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.ContentProvider;
import org.eclipse.jetty.client.api.ContentResponse;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.util.StringContentProvider;
import com.aliyun.openservices.ons.api.impl.authority.AuthUtil;
public class HttpProducer {
  public static String SIGNATURE="Signature";
  public static String NUM="num";
  public static String CONSUMERID="ConsumerID";
  public static String PRODUCERID="ProducerID";
  public static String TIMEOUT="timeout";
  public static String TOPIC="Topic";
  public static String AK="AccessKey";
  public static String BODY="body"; 
  public static String MSGHANDLE="msgHandle";
  public static String TIME="time";
  public static void main(String[] args) throws Exception {
    HttpClient httpClient=new HttpClient(); 
    httpClient.setMaxConnectionsPerDestination(1);
    httpClient.start(); 
    Properties properties=new Properties();
    properties.load(HttpProducer.class.getClassLoader().getResourceAsStream("user.properties"));
    String topic=properties.getProperty("Topic"); //请在user.properties配置您的Topic
    String url=properties.getProperty("URL");//公测集群配置为http://publictest-rest.ons.aliyun.com/
    String ak=properties.getProperty("Ak");//请在user.properties配置您的Ak
    String sk=properties.getProperty("Sk");//请在user.properties配置您的Sk
    String pid=properties.getProperty("ProducerID");//请在user.properties配置您的Producer ID
    String date=String.valueOf(new Date().getTime()); 
    String sign=null;
    String body="hello ons http";
    String NEWLINE="\n";
    String signString;
    for (int i = 0; i < 10; i++) {
      date=String.valueOf(new Date().getTime());
      Request req=httpClient.POST(url+"message/?topic="+topic+"&time="+date+"&tag=http"+"&key=http");
      ContentProvider content=new StringContentProvider(body);
      req.content(content);
      signString=topic+NEWLINE+pid+NEWLINE+MD5.getInstance().getMD5String(body)+NEWLINE+date;
      System.out.println(signString);
      sign=AuthUtil.calSignature(signString.getBytes(Charset.forName("UTF-8")), sk);
      req.header(SIGNATURE, sign);
      req.header(AK, ak);
      req.header(PRODUCERID, pid);
      ContentResponse response;
      response=req.send();
      System.out.println("send msg:"+response.getStatus()+response.getContentAsString());
    } 
  }
}

</div>

4. HTTP接收消息示例代码

请按以下说明设置相应参数并测试 HTTP 消息接收功能。

package com.aliyun.openservice.ons.http.demo;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.ContentProvider;
import org.eclipse.jetty.client.api.ContentResponse;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.util.StringContentProvider;
import org.eclipse.jetty.http.HttpMethod;
import com.alibaba.fastjson.JSON;
import com.aliyun.openservice.ons.mqtt.demo.MqttProducer;
import com.aliyun.openservices.ons.api.impl.authority.AuthUtil;
public class HttpConsumer {
  public static String SIGNATURE="Signature";
  public static String NUM="num";
  public static String CONSUMERID="ConsumerID";
  public static String PRODUCERID="ProducerID";
  public static String TIMEOUT="timeout";
  public static String TOPIC="Topic";
  public static String AK="AccessKey";
  public static String BODY="body"; 
  public static String MSGHANDLE="msgHandle";
  public static String TIME="time";
  public static void main(String[] args) throws Exception {
    HttpClient httpClient=new HttpClient(); 
    httpClient.setMaxConnectionsPerDestination(1);
    httpClient.start(); 
    Properties properties=new Properties();
    properties.load(HttpConsumer.class.getClassLoader().getResourceAsStream("user.properties"));
    String topic=properties.getProperty("Topic"); //请在user.properties配置您的topic
    String url=properties.getProperty("URL");//公测集群配置为http://publictest-rest.ons.aliyun.com/
    String ak=properties.getProperty("Ak");//请在user.properties配置您的Ak
    String sk=properties.getProperty("Sk");//请在user.properties配置您的Sk
    String cid=properties.getProperty("ConsumerID");//请在user.properties配置您的Consumer ID
    String date=String.valueOf(new Date().getTime()); 
    String sign=null;
    String NEWLINE="\n";
    String signString;
    System.out.println(NEWLINE+NEWLINE);
    while (true) { 
      try {
        date=String.valueOf(new Date().getTime());
        Request req=httpClient.POST(url+"message/?topic="+topic+"&time="+date+"&num="+32);
        req.method(HttpMethod.GET);
        ContentResponse response;
        signString=topic+NEWLINE+cid+NEWLINE+date;
        sign=AuthUtil.calSignature(signString.getBytes(Charset.forName("UTF-8")), sk);
        req.header(SIGNATURE, sign);
        req.header(AK, ak);
        req.header(CONSUMERID, cid);
        long start=System.currentTimeMillis();
        response=req.send();
        System.out.println("get cost:"+(System.currentTimeMillis()-start)/1000 
                  +"  "+response.getStatus()+"  "+response.getContentAsString()); 
        List<SimpleMessage> list = null;
        if (response.getContentAsString()!=null&&!response.getContentAsString().isEmpty()) {
           list=JSON.parseArray(response.getContentAsString(), SimpleMessage.class);
        }
        if (list==null||list.size()==0) {
          Thread.sleep(100);
          continue;
        } 
        System.out.println("size is :"+list.size());
        for (SimpleMessage simpleMessage : list) {
          date=String.valueOf(new Date().getTime());
          System.out.println("receive msg:"+simpleMessage.getBody()+"  born time "+simpleMessage.getBornTime());
          req=httpClient.POST(url+"message/?msgHandle="+simpleMessage.getMsgHandle()+"&topic="+topic+"&time="+date);
          req.method(HttpMethod.DELETE);
          signString=topic+NEWLINE+cid+NEWLINE+simpleMessage.getMsgHandle()+NEWLINE+date;
          sign=AuthUtil.calSignature(signString.getBytes(Charset.forName("UTF-8")), sk);
          req.header(SIGNATURE, sign);
          req.header(AK, ak);
          req.header(CONSUMERID, cid);

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