📄 sevpost.java
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import java.io.*;
import java.net.*;
import java.util.*;
public class sevpost {
public static void main(String argv[]) throws Exception {
int port=6789;
ServerSocket listenSocket = null;
try{
listenSocket = new ServerSocket(port);
for (;;) {
Socket connectionSocket = listenSocket.accept(); // 接受客户机的连接请求
System.out.println("New connection accepted " +
connectionSocket.getInetAddress() +
":" + connectionSocket.getPort());
new Connection(connectionSocket).start();
}
} catch(Exception e)
{
System.out.println(e);
}
}
}
class Connection extends Thread {
String requestMessageLine;
String fileName;
Socket connectionclient;
public Connection(Socket c1){
connectionclient=c1;
}
public void run()
{
try {
DataOutputStream outToClient = new DataOutputStream(connectionclient.getOutputStream());
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionclient.getInputStream()));
requestMessageLine=inFromClient.readLine(); // 读取Web浏览器提交的请求信息
StringTokenizer tokenizedLine = new StringTokenizer(requestMessageLine);
System.out.println(requestMessageLine);
String s = tokenizedLine.nextToken();
System.out.println("Received:"+requestMessageLine);
if (s.equals("GET")) { // 如果是GET请求
fileName = tokenizedLine.nextToken();
if (fileName.startsWith("/") == true)
fileName = fileName.substring(1);
System.out.println(fileName+" requested.");
File file=new File(fileName);
if (file.exists()) {
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");
outToClient.writeBytes("Content-Length:"+numOfBytes+"\r\n");
outToClient.writeBytes("\r\n");
outToClient.write(fileInBytes,0,numOfBytes);
}
else { // 文件不存在时
String notfound="<html><head><title>Not Found</title></head><body><h1>Error 404-file not found</h1></body></html>";
outToClient.writeBytes("HTTP/1.0 404 no found");
outToClient.writeBytes("Content_Type:text/html");
outToClient.writeBytes("Content_Length:"+notfound.length()+2);
outToClient.writeBytes("");
outToClient.writeBytes(notfound);
}
connectionclient.close();
}
else{
if(s.equals("POST")){
StringTokenizer token;
String post=null;
fileName = tokenizedLine.nextToken();
String str = null;
char buff[] = new char[1024];
int sizeOfBuff;
sizeOfBuff = inFromClient.read(buff);
str = new String(buff,0,sizeOfBuff);
if (fileName.startsWith("/") == true)
fileName = fileName.substring(1);
System.out.println(fileName);
System.out.println(str);
File file = new File(fileName);
if (file.exists()) {
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");
outToClient.writeBytes("Content-Length:"+numOfBytes+"\r\n");
outToClient.writeBytes("\r\n");
outToClient.write(fileInBytes,0,numOfBytes);
}
token = new StringTokenizer(str, "\n\n");
while(token.hasMoreTokens())
post = token.nextToken();
namevalue(post);
}
else {
System.out.println("Bad Request Message");
String worr="<html><head><title>Not Found</title></head><body><h1>Error 400 ; Failure of POST testing !</h1></body></html>";
outToClient.writeBytes("Content_Type:text/html");
outToClient.writeBytes("Content_Length:"+worr.length()+2);
outToClient.writeBytes("");
outToClient.writeBytes(worr);
}
connectionclient.close();
}
} catch(Exception e)
{
System.out.println(e);
}
}
private static void namevalue(String str){
String userName , value;
StringTokenizer token1 , token2;
token1 = new StringTokenizer(str,"&");
while (token1.hasMoreTokens()){
token2 = new StringTokenizer(token1.nextToken(),"=");
userName = token2.nextToken();
if(token2.hasMoreTokens()){
value = token2.nextToken();
}
else{
value = "<null>";
}
System.out.println( "POST得到的数据: "+userName+"\t\t"+value+"\n");
}
}
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