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猫咪也爱手撕面包

#1 Created at ... [Delete] [Delete and Lock User]

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.net.ServerSocket;

import java.net.Socket;

import java.nio.charset.StandardCharsets;

/**

 * Learn Java from https://www.liaoxuefeng.com/

 * 

 * @author liaoxuefeng

 */

public class Server {

public static void main(String[] args) throws IOException {

ServerSocket ss = new ServerSocket(8080); // 监听指定端口

System.out.println("server is running...");

for (;;) {

Socket sock = ss.accept();

System.out.println("connected from " + sock.getRemoteSocketAddress());

Thread t = new Handler(sock);

t.start();

}

}

}

class Handler extends Thread {

Socket sock;

public Handler(Socket sock) {

this.sock = sock;

}

@Override

public void run() {

try (InputStream input = this.sock.getInputStream()) {

try (OutputStream output = this.sock.getOutputStream()) {

handle(input, output);

}

} catch (Exception e) {

try {

this.sock.close();

} catch (IOException ioe) {

}

System.out.println("client disconnected.");

}

}

private void handle(InputStream input, OutputStream output) throws IOException {

System.out.println("Process new http request...");

var reader = new BufferedReader(new InputStreamReader(input, StandardCharsets.UTF_8));

var writer = new BufferedWriter(new OutputStreamWriter(output, StandardCharsets.UTF_8));

// 读取HTTP请求:

boolean requestOk = false;

String first = reader.readLine();

if (first.startsWith("GET / HTTP/1.")) {

requestOk = true;

}

for (;;) {

String header = reader.readLine();

if (header.isEmpty()) { // 读取到空行时, HTTP Header读取完毕

break;

}

System.out.println(header);

}

System.out.println(requestOk ? "Response OK" : "Response Error");

if (!requestOk) {

// 发送错误响应:

writer.write("404 Not Found\r\n");

writer.write("Content-Length: 0\r\n");

writer.write("\r\n");

writer.flush();

} else {

// 发送成功响应:

String data = "<html><body><h1>Hello, world!</h1></body></html>";

int length = data.getBytes(StandardCharsets.UTF_8).length;

writer.write("HTTP/1.0 200 OK\r\n");

writer.write("Connection: close\r\n");

writer.write("Content-Type: text/html\r\n");

writer.write("Content-Length: " + length + "\r\n");

writer.write("\r\n"); // 空行标识Header和Body的分隔

writer.write(data);

writer.flush();

}

}

}

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