Java 收發消息__HTTP 接入(簡單)_消息隊列 MQ-阿裏雲

4. HTTP接收消息示例代碼

請按以下說明設置相應參數並測試 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"); //請在user.properties配置您的topic
        String url=properties.getProperty("URL");//公測集群配置為https://publictest-rest.ons.aliyun.com/
        String ak=properties.getProperty("Ak");//請在user.properties配置您的Ak
        String sk=properties.getProperty("Sk");//請在user.properties配置您的Sk
        String cid=properties.getProperty("ConsumerID");//請在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);
                    response=req.send();    
                    System.out.println("delete msg:"+response.toString());
                }  
                Thread.sleep(100);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

package com.aliyun.openservice.ons.http.demo;
public class SimpleMessage {
    private String body;
    private String msgId;
    private String bornTime;
    private String msgHandle;
    private int reconsumeTimes;
    private String tag;
    public void setTag(String tag) {
        this.tag = tag;
    }
    public String getTag() {
        return tag;
    }
    public int getReconsumeTimes() {
        return reconsumeTimes;
    }
    public void setReconsumeTimes(int reconsumeTimes) {
        this.reconsumeTimes = reconsumeTimes;
    }
    public void setMsgHandle(String msgHandle) {
        this.msgHandle = msgHandle;
    }
    public String getMsgHandle() {
        return msgHandle;
    }
    public String getBody() {
        return body;
    }
    public void setBody(String body) {
        this.body = body;
    }
    public String getMsgId() {
        return msgId;
    }
    public void setMsgId(String msgId) {
        this.msgId = msgId;
    }
    public String getBornTime() {
        return bornTime;
    }
    public void setBornTime(String bornTime) {
        this.bornTime = bornTime;
    }
}

package com.aliyun.openservice.ons.http.demo;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.sql.SQLException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReentrantLock;
import org.slf4j.LoggerFactory;
public class MD5 {
    private static final org.slf4j.Logger log = LoggerFactory.getLogger(MD5.class);
    private static char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
    private static Map<Character, Integer> rDigits = new HashMap<Character, Integer>(16);
    static {
        for (int i = 0; i < digits.length; ++i) {
            rDigits.put(digits[i], i);
        }
    }
    private static MD5 me = new MD5();
    private MessageDigest mHasher;
    private final ReentrantLock opLock = new ReentrantLock();
    private MD5() {
        try {
            this.mHasher = MessageDigest.getInstance("md5");
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    public static MD5 getInstance() {
        return me;
    }
    public String getMD5String(String content) {
        return this.bytes2string(this.hash(content));
    }
    public String getMD5String(byte[] content) {
        return this.bytes2string(this.hash(content));
    }
    public byte[] getMD5Bytes(byte[] content) {
        return this.hash(content);
    }
    public byte[] hash(String str) {
        this.opLock.lock();
        try {
            byte[] bt = this.mHasher.digest(str.getBytes("utf-8"));
            if (null == bt || bt.length != 16) {
                throw new IllegalArgumentException("md5 need");
            }
            return bt;
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException("unsupported utf-8 encoding", e);
        } finally {
            this.opLock.unlock();
        }
    }
    public byte[] hash(byte[] data) {
        this.opLock.lock();
        try {
            byte[] bt = this.mHasher.digest(data);
            if (null == bt || bt.length != 16) {
                throw new IllegalArgumentException("md5 need");
            }
            return bt;
        } finally {
            this.opLock.unlock();
        }
    }
    public String bytes2string(byte[] bt) {
        int l = bt.length;
        char[] out = new char[l << 1];
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = digits[(0xF0 & bt[i]) >>> 4];
            out[j++] = digits[0x0F & bt[i]];
        }
        if (log.isDebugEnabled()) {
            log.debug("[hash]" + new String(out));
        }
        return new String(out);
    }
    public byte[] string2bytes(String str) {
        if (null == str) {
            throw new NullPointerException("Argument is not allowed empty");
        }
        if (str.length() != 32) {
            throw new IllegalArgumentException("String length must equals 32");
        }
        byte[] data = new byte[16];
        char[] chs = str.toCharArray();
        for (int i = 0; i < 16; ++i) {
            int h = rDigits.get(chs[i * 2]).intValue();
            int l = rDigits.get(chs[i * 2 + 1]).intValue();
            data[i] = (byte) ((h & 0x0F) << 4 | l & 0x0F);
        }
        return data;
    }
}