java - 简单的java web服务器但没有输出

Question

我正在编写一个简单的 Java Web 服务器来帮助我理解该机制。但似乎不起作用。它将打印请求，但我无法在浏览器或 telnet 客户端上得到任何响应。您能帮忙解释一下为什么没有回复吗？

public Server() throws IOException {
    this.ss = new ServerSocket(this.PORT);
}

@Override
public void run() {

    while(true) {
        try {
            Socket cli = this.ss.accept();
            new Thread(new Hanlder(cli)).start();
        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }
}

class Hanlder implements Runnable {

    private Socket client = null;

    public Hanlder(Socket cli) {
        client = cli;
    }

    @Override
    public void run() {
        BufferedWriter bwriter;
        try {

            InputStreamReader input = new InputStreamReader(this.client.getInputStream());
            BufferedReader buf = new BufferedReader(input);
            String line = null;
            while( (line = buf.readLine()) != null ) {
                System.out.println(line);
            }

            bwriter = new BufferedWriter( new OutputStreamWriter(client.getOutputStream()));
            bwriter.write("HTTP/1.1 200 OK \n"
                    + "Hello, World");
            bwriter.flush();

            this.client.close();

        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }
}

Answer 1

您还需要在 header 中提供 Content-Type 和 Content-Length 参数。

同样在 HTTP 中，您应该以 \r\n 终止行，并以 \r\n\r\n 终止 header 。

例如:

bwriter.write("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 3\r\n\r\nABC");