Web Server（Java版） 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * * @Description: //TODO 简单的HTTP服务器， 其实就是接受HTTP请求，并解析请求， * @Author: sunfch
 * * @Date: 2019/1/3 16:35 * @Param: * @Return:
 */
public class HttpServer {
    public static void main(String[] args) {
        try {
            /* 监听端口号，只要是8888就能接收到 */ 
            ServerSocket ss = new ServerSocket(8888);
            while (true) {
                /* 实例化客户端，固定套路，通过服务端接受的对象，生成相应的客户端实例 */ 
                Socket socket = ss.accept();
                /* 获取客户端输入流，就是请求过来的基本信息：请求头，换行符，请求体 */ 
                BufferedReader bd = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                /** * 接受HTTP请求，并解析数据 */
                String requestHeader;
                int contentLength = 0;
                while ((requestHeader = bd.readLine()) != null && !requestHeader.isEmpty()) {
                    System.out.println(requestHeader);
                    /** * 获得GET参数 */
                    if (requestHeader.startsWith("GET")) {
                        int begin = requestHeader.indexOf("/") ;
                        int end = requestHeader.indexOf("HTTP/");
                        String condition = requestHeader.substring(begin, end);
                        System.out.println("GET参数是：" + condition);
                    }
                    /** * 获得POST参数 * 1.获取请求内容长度 */
                    if (requestHeader.startsWith("Content-Length")) {
                        int begin = requestHeader.indexOf("Content-Lengh:") + "Content-Length:".length();
                        String postParamterLength = requestHeader.substring(begin+1).trim();
                        contentLength = Integer.parseInt(postParamterLength);
                        System.out.println("POST参数长度是：" + Integer.parseInt(postParamterLength));
                    }
                }
                StringBuffer sb = new StringBuffer();
                if (contentLength > 0) {
                    for (int i = 0; i < contentLength; i++) {
                        sb.append((char) bd.read());
                    }
                    System.out.println("POST参数是：" + sb.toString());
                }
                /* 发送回执 */ 
                PrintWriter pw = new PrintWriter(socket.getOutputStream());
                pw.println("HTTP/1.1 200 OK");
                pw.println("Content-type:text/html");
                pw.println();
        
                pw.println("<HTML>");
                pw.println("<TITLE>Index</TITLE>");
                pw.println("<BODY>");
                pw.println("<P>Welcome to J. David's webserver.");
                pw.println("<H1>CGI demo1");
                pw.println("<FORM ACTION=\"color.cgi\" METHOD=\"POST\">");
                pw.println("Enter a color: <INPUT TYPE=\"text\" NAME=\"color\">");
                pw.println("<P>");
                pw.println("Enter a number: <INPUT TYPE=\"text\" NAME=\"number\">");
                pw.println("<INPUT TYPE=\"submit\">");
                pw.println("</FORM>");
                pw.println("</BODY>");
                pw.println("</HTML>");
                
    
                pw.flush();
                socket.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

 

posted on 2020-03-21 19:49  酷卡宜  阅读(354)  评论(0)    收藏  举报

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