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package com.example.httpserver;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

public class HttpServer {

private static final Integer port = 80;//HTTP默认端口80

public static void main(String[] args) {

ServerSocket serverSocket;

try {

//建立服务器Socket,监听客户端请求

serverSocket = new ServerSocket(port);

System.out.println("Server is running on port:"+serverSocket.getLocalPort());

//死循环不间断监听客户端请求

while(true){

final Socket socket = serverSocket.accept();

System.out.println("biuld a new tcp link with client,the cient address:"+

socket.getInetAddress()+":"+socket.getPort());

//并发处理HTTP客户端请求

service(socket);

}

} catch (IOException e) {

e.printStackTrace();

}

}

public static void service(Socket socket)

{

new Thread(){

public void run(){

InputStream inSocket;

try {

//获取HTTP请求头

inSocket = socket.getInputStream();

int size = inSocket.available();

byte[] buffer = new byte[size];

inSocket.read(buffer);

String request = new String(buffer);

System.out.println("ClientBrowser:\n"+request+"\n"

+ "------------------------------------------------------------------");

String firstLineOfRequest = "";

String[] heads;

String uri = "/index.html";

String contentType ="";

if(request.length() > 0){

firstLineOfRequest = request.substring(0,request.indexOf("\r\n"));

heads = firstLineOfRequest.split(" ");

uri = heads[1];

if(uri.indexOf("html") != -1){

contentType = "text/html";

}else{

contentType = "application/octet-stream";

}

}

//将响应头发送给客户端

String responseFirstLine = "HTTP/1.1 200 OK\r\n";

String responseHead = "Content-Type:" + contentType +"\r\n";

OutputStream outSocket = socket.getOutputStream();

System.out.println("ServerResponse:\n"+responseFirstLine+"\n"+responseHead+"\n"

+ "--------------------------------------------------------------------");

outSocket.write(responseFirstLine.getBytes());

outSocket.write(responseHead.getBytes());

//通过HTTP请求中的uri读取相应文件发送给客户端

FileInputStream writehtml = new FileInputStream(new File("wwwroot"+uri));

outSocket.write("\r\n".getBytes());

byte[] htmlbuffer = new byte[writehtml.available()];

if(writehtml !=null){

int len = 0;

System.out.println("writeHtml");

while((len = writehtml.read(htmlbuffer)) != -1){

outSocket.write(htmlbuffer, 0,len);

}

}

outSocket.close();

socket.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}.start();

}

}