JDK6新玩具---HttpServer的使用

2009-09-02

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JDK6新玩具---HttpServer的使用

關鍵字: httpserver httpserverprovider

   介紹摘自網絡:

   JDK6提供了一個簡單的Http Server API,據此我們可以構建自己的嵌入式Http Server,它支持Http和Https協議,提供了HTTP1.1的部分實現，沒有被實現的那部分可以通過擴展已有的Http Server API來實現,程序員必須自己實現HttpHandler接口,HttpServer會調用HttpHandler實現類的回調方法來處理客戶端請求,在這裏,我們把一個Http請求和它的響應稱爲一個交換,包裝成HttpExchange類,HttpServer負責將HttpExchange傳給HttpHandler實現類的回調方法

 

   我想開發一個j2se的小程序，它能接受網頁傳來的參數，並對傳來參數做些處理。我希望這個小程序即可能接受網頁傳過來的參數，也能接受OutputStream流傳來參數，JDK6新特性能夠實現。

一、提供http服務的類

package com.tdt.server.httpserver;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.spi.HttpServerProvider;

/**
 * @project SimpleHttpServer
 * @author sunnylocus
 * @vresion 1.0 2009-9-2
 * @description  自定義的http服務器
 */
public class MyHttpServer {
    //啓動服務，監聽來自客戶端的請求
    public static void httpserverService() throws IOException {
        HttpServerProvider provider = HttpServerProvider.provider();
        HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(6666), 100);//監聽端口6666,能同時接 受100個請求
        httpserver.createContext("/myApp", new MyHttpHandler());
        httpserver.setExecutor(null);
        httpserver.start();
        System.out.println("server started");
    }
    //Http請求處理類
    static class MyHttpHandler implements HttpHandler {
        public void handle(HttpExchange httpExchange) throws IOException {
            String responseMsg = "ok";   //響應信息
            InputStream in = httpExchange.getRequestBody(); //獲得輸入流
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));
            String temp = null;
            while((temp = reader.readLine()) != null) {
                System.out.println("client request:"+temp);
            }
            httpExchange.sendResponseHeaders(200, responseMsg.length()); //設置響應頭屬性及響應信息的長度
            OutputStream out = httpExchange.getResponseBody();  //獲得輸出流
            out.write(responseMsg.getBytes());
            out.flush();
            httpExchange.close();

        }
    }
    public static void main(String[] args) throws IOException {
        httpserverService();
    }
}

package com.tdt.server.httpserver;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.spi.HttpServerProvider;

/**
 * @project SimpleHttpServer
 * @author sunnylocus
 * @vresion 1.0 2009-9-2
 * @description  自定義的http服務器
 */
public class MyHttpServer {
    //啓動服務，監聽來自客戶端的請求
	public static void httpserverService() throws IOException {
		HttpServerProvider provider = HttpServerProvider.provider();
		HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(6666), 100);//監聽端口6666,能同時接 受100個請求
		httpserver.createContext("/myApp", new MyHttpHandler()); 
		httpserver.setExecutor(null);
		httpserver.start();
		System.out.println("server started");
	}
	//Http請求處理類
	static class MyHttpHandler implements HttpHandler {
		public void handle(HttpExchange httpExchange) throws IOException {
			String responseMsg = "ok";   //響應信息
			InputStream in = httpExchange.getRequestBody(); //獲得輸入流
			BufferedReader reader = new BufferedReader(new InputStreamReader(in));
			String temp = null;
			while((temp = reader.readLine()) != null) {
				System.out.println("client request:"+temp);
			}
			httpExchange.sendResponseHeaders(200, responseMsg.length()); //設置響應頭屬性及響應信息的長度
			OutputStream out = httpExchange.getResponseBody();  //獲得輸出流
			out.write(responseMsg.getBytes());
			out.flush();
			httpExchange.close();                               
			
		}
	}
	public static void main(String[] args) throws IOException {
		httpserverService();
	}
}

 

二、測試類

package com.tdt.server.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @project SimpleHttpServer
 * @author sunnylocus
 * @vresion 1.0 2009-9-2
 * @description 測試類
 */
public class Test {
    public static void main(String[] args) {
        ExecutorService exec = Executors.newCachedThreadPool();
        // 測試併發對MyHttpServer的影響
        for (int i = 0; i < 20; i++) {
            Runnable run = new Runnable() {
                public void run() {
                    try {
                        startWork();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            };
            exec.execute(run);
        }
        exec.shutdown();// 關閉線程池
    }

    public static void startWork() throws IOException {
        URL url = new URL("http://127.0.0.1:6666/myApp");
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
        urlConn.setDoOutput(true);
        urlConn.setDoInput(true);
        urlConn.setRequestMethod("POST");
        // 測試內容包
        String teststr = "this is a test message";
        OutputStream out = urlConn.getOutputStream();
        out.write(teststr.getBytes());
        out.flush();
        while (urlConn.getContentLength() != -1) {
            if (urlConn.getResponseCode() == 200) {
                InputStream in = urlConn.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
                String temp = "";
                while ((temp = reader.readLine()) != null) {
                    System.err.println("server response:" + temp);// 打印收到的信息
                }
                reader.close();
                in.close();
                urlConn.disconnect();
            }
        }
    }
}

package com.tdt.server.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @project SimpleHttpServer
 * @author sunnylocus
 * @vresion 1.0 2009-9-2
 * @description 測試類  
 */
public class Test {
	public static void main(String[] args) {
		ExecutorService exec = Executors.newCachedThreadPool();
		// 測試併發對MyHttpServer的影響
		for (int i = 0; i < 20; i++) {
			Runnable run = new Runnable() {
				public void run() {
					try {
						startWork();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			};
			exec.execute(run);
		}
		exec.shutdown();// 關閉線程池
	}

	public static void startWork() throws IOException {
		URL url = new URL("http://127.0.0.1:6666/myApp");
		HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
		urlConn.setDoOutput(true);
		urlConn.setDoInput(true);
		urlConn.setRequestMethod("POST");
		// 測試內容包
		String teststr = "this is a test message";
		OutputStream out = urlConn.getOutputStream();
		out.write(teststr.getBytes());
		out.flush();
		while (urlConn.getContentLength() != -1) {
			if (urlConn.getResponseCode() == 200) {
				InputStream in = urlConn.getInputStream();
				BufferedReader reader = new BufferedReader(new InputStreamReader(in));
				String temp = "";
				while ((temp = reader.readLine()) != null) {
					System.err.println("server response:" + temp);// 打印收到的信息
				}
				reader.close();
				in.close();
				urlConn.disconnect();
			}
		}
	}
}

 

注意：經過我測試發現httpExchange.sendResponseHeaders(200, responseMsg.length())有bug,如果responseMsg裏面包含中文的話，客戶端不會收到任何信息，因爲一個漢字用二個字節表示。

應修改爲：

httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, responseMsg.getBytes().length);