使用 Runnable 类与 Java 服务器进行 URL 解析 [英] URL Parsing with Java server using Runnable class

问题描述

如何使用这样的系统解析 URL 查询.

How can I parse URL queries with a system like this.

例如，在变量中获取这些 URL 参数.

For Example something like get these URL arguments in variables.

http://localhost?format=json&apikey=838439873473kjdhfkhdf

http://tutorials.jenkov.com/java-multithreaded-服务器/多线程-server.html

我制作了这些文件

WorkerRunnable.java

package servers;

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.net.Socket;

/**

*/
public class WorkerRunnable implements Runnable{

protected Socket clientSocket = null;
protected String serverText   = null;

public WorkerRunnable(Socket clientSocket, String serverText) {
    this.clientSocket = clientSocket;
    this.serverText   = serverText;
}

public void run() {
    try {
        InputStream input  = clientSocket.getInputStream();
        OutputStream output = clientSocket.getOutputStream();
        long time = System.currentTimeMillis();
        output.write(("HTTP/1.1 200 OK\n\nWorkerRunnable: " +
                this.serverText + " - " +
                time +
                "").getBytes());
        output.close();
        input.close();
        System.out.println("Request processed: " + time);
    } catch (IOException e) {
        //report exception somewhere.
        e.printStackTrace();
    }
  }
 }

MultiThreadedServer.java

package servers;

import java.net.ServerSocket;
import java.net.Socket;
import java.io.IOException;

public class MultiThreadedServer implements Runnable{

protected int          serverPort   = 8080;
protected ServerSocket serverSocket = null;
protected boolean      isStopped    = false;
protected Thread       runningThread= null;

public MultiThreadedServer(int port){
    this.serverPort = port;
}

public void run(){
    synchronized(this){
        this.runningThread = Thread.currentThread();
    }
    openServerSocket();
    while(! isStopped()){
        Socket clientSocket = null;
        try {
            clientSocket = this.serverSocket.accept();
        } catch (IOException e) {
            if(isStopped()) {
                System.out.println("Server Stopped.") ;
                return;
            }
            throw new RuntimeException(
                "Error accepting client connection", e);
        }
        new Thread(
            new WorkerRunnable(
                clientSocket, "Multithreaded Server")
        ).start();
    }
    System.out.println("Server Stopped.") ;
}


private synchronized boolean isStopped() {
    return this.isStopped;
}

public synchronized void stop(){
    this.isStopped = true;
    try {
        this.serverSocket.close();
    } catch (IOException e) {
        throw new RuntimeException("Error closing server", e);
    }
}

private void openServerSocket() {
    try {
        this.serverSocket = new ServerSocket(this.serverPort);
    } catch (IOException e) {
        throw new RuntimeException("Cannot open port 8080", e);
    }
}

}

Dispatch.java

 package servers;

 public class Dispatch {

/**
 * @param args
 */
public static void main(String[] args) {
    MultiThreadedServer server = new MultiThreadedServer(9000);
    new Thread(server).start();

    try {
        Thread.sleep(20 * 1000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    System.out.println("Stopping Server");
    server.stop();

}

}

推荐答案

到目前为止你做得很好.

You're doing fine so far.

一次一行地从 InputStream 中读取数据(BufferedReader 可能会有所帮助).阅读并学习 HTTP 协议(​​请参阅此处的请求消息部分:http://en.wikipedia.org/wiki/超文本_传输_协议).

Read the data off of the InputStream (BufferedReader might help) one line at a time. Read and learn the HTTP Protocol (see Request Message section here: http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol).

客户端发送的第一行将遵循该格式:GET/foo.html?x=y&a=b HTTP/1.1 后跟 \n\n 这是方法，URL(带查询参数)和协议.拆分该行(在空格上...)，然后根据规范拆分 URL.

The first line that the client sends is going to follow that format: GET /foo.html?x=y&a=b HTTP/1.1 followed by \n\n that's the Method, URL (with query parameters) and Protocol. Split that line (on the spaces...) and then break the URL up according to the specs.

您需要的一切都可以在用于解析数据的 String 类中找到.

Everything you need can be found in the String class for parsing the data.

这篇关于使用 Runnable 类与 Java 服务器进行 URL 解析的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！