java.txt

本程序是关于“Windows环境下用java实现web服务器”的。

import java.io.*;
import java.net.*;
import java.util.*;
import java.lang.*;
public class WebServer
{
public static void main(String argv[]) throws Exception
{
String requestMessageLine;
String fileName;
ServerSocket listenSocket = new ServerSocket(1234);
while(true)
{
Socket connectionSocket = listenSocket.accept();
BufferedReader inFromClient= new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream (connectionSocket.getOutputStream());
requestMessageLine=inFromClient.readLine();
StringTokenizer tokenizedLine= new StringTokenizer(requestMessageLine);
if(tokenizedLine.nextToken().equals("GET"))
{
fileName = tokenizedLine.nextToken();
System.out.println("Ok"+requestMessageLine+"FN="+fileName);
if(fileName.startsWith("/")==true)
fileName = fileName.substring(1);
System.out.println("Ok"+requestMessageLine+"FN="+fileName);
File file = new File(fileName);
int numOfBytes = (int)file.length();
FileInputStream inFile = new FileInputStream(fileName);
byte[] fileInBytes=new byte[numOfBytes];
inFile.read(fileInBytes);
outToClient.writeBytes("HTTP/1.0 200 Document Follows\r\n");
if(fileName.endsWith(".jpg"))
outToClient.writeBytes("Content-Type:image/jpeg\r\n");
if(fileName.endsWith(".gif"))
outToClient.writeBytes("Content-Type:image/gif\r\n");
outToClient.writeBytes("Content-Length:"+numOfBytes+"\r\n");
outToClient.writeBytes("\r\n");
outToClient.write(fileInBytes,0,numOfBytes);
System.out.println("Ok");
}
else System.out.println("Bad Request Message");
}}}