package cn.edu.sss.httpServer;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.util.Date;
//这个类是对http协议返回的封装
public class HttpResponse {
public final String CRLF="\r\n";
public final String BLANK=" ";
//返回正文的长度
private int len;
//返回状态行和请求头信息
private StringBuilder head;
//返回正文内容
private StringBuilder content;
//用于写到输出流中
private BufferedWriter bw;
private HttpResponse()
{
len=0;
content=new StringBuilder();
head=new StringBuilder();
}
public HttpResponse(Socket s)
{
this();
try {
bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
} catch (IOException e) {
// TODO Auto-generated catch block
head=null;
e.printStackTrace();
}
}
//构建正文
public void print(String s)
{
content.append(s);
len=content.toString().getBytes().length;
}
public void println(String s)
{
content.append(s).append(CRLF);
len=content.toString().length();
}
/*
private void createHeadInfo(int code){
//1) HTTP协议版本、状态代码、描述
headInfo.append("HTTP/1.1").append(BLANK).append(code).append(BLANK);
switch(code){
case 200:
headInfo.append("OK");
break;
case 404:
headInfo.append("NOT FOUND");
break;
case 505:
headInfo.append("SEVER ERROR");
break;
}
headInfo.append(CRLF);
//2) 响应头(Response Head)
headInfo.append("Server:bjsxt Server/0.0.1").append(CRLF);
headInfo.append("Date:").append(new Date()).append(CRLF);
headInfo.append("Content-type:text/html;charset=GBK").append(CRLF);
//正文长度 ：字节长度
headInfo.append("Content-Length:").append(len).append(CRLF);
headInfo.append(CRLF); //分隔符
}
//推送到客户端
*/
private void createHeader(int code)
{
head.append("HTTP/1.1").append(BLANK).append(code).append(BLANK);
switch(code)
{
case 200:
head.append("OK");break;
case 404:
head.append("NOT FOUND");
}
head.append(CRLF);
head.append("Server:tomcat").append(CRLF);
head.append("Date:").append(new Date()).append(CRLF);
head.append("Content-type:text/html;charset=GBK").append(CRLF);
head.append("Content-Length:").append(len).append(CRLF);
head.append(CRLF);
}
public void flush(int code) throws IOException
{
createHeader(code);
bw.write(head.toString());
bw.write(content.toString());
bw.flush();
}
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
HTTP/1.1 200 OK Server:Apache Tomcat/5.0.12 Date:Mon,6Oct2003 13:23:42 GMT Content-Length:112
好了，我们测试一下httpResponse的用法
package cn.edu.sss.httpServer;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
public class ServerDemo1 {
public static final String BLANK=" ";
public static final String CRLF="\r\n";
public static void main(String args[]) throws IOException
{
ServerSocket server=new ServerSocket(8088);
Socket socket=server.accept();
byte[] bytes=new byte[20000];
System.out.println(socket.getInetAddress());
int len=socket.getInputStream().read(bytes);
String request=new String(bytes,0,len);
System.out.println(request);
HttpResponse response=new HttpResponse(socket);
response.print("<html><head><titilt>你怎么舍得我难过</title>大姑娘美，大姑娘浪</head><body></body></html>");
response.flush(200);//指明响应码
/*
//下面构造响应正文
StringBuilder sbu=new StringBuilder();
sbu.append("<html><head><titilt>你怎么舍得我难过</title>大姑娘美，大姑娘浪</head><body></body></html>");
//
StringBuilder response=new StringBuilder();
response.append("HTTP/1.1").append(BLANK).append("200").append(BLANK).append("OK").append(CRLF);
//响应头
response.append("Server: tomcat").append(CRLF);
response.append("Date").append(new Date()).append(CRLF);
response.append("Content-type:text/html;charset=GBK").append(CRLF);
//正文长度，字节长度
response.append("Content-Length:").append(sbu.toString().getBytes().length).append(CRLF);
response.append(CRLF);
//加入正文
response.append(sbu);
System.out.println(response);
//返回给服务器端
BufferedWriter buf=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
buf.write(response.toString());
buf.flush();;
buf.close();
*/
}
}
现在我们测试一下:在浏览器中输入网址
localhost:8088
会返回我们的网页，你可以试试
时间： 2024-10-29 07:33:02