HTTP head 2

Mausolo · Nov 20, 2003

I want to make a simple http server like this

import java.net.*;
import java.io.*;
public class MyHttpServer {

/** Creates a new instance of MyHttpServer */
public MyHttpServer() {
}
public void run()
{
try
{
int port = 10000;
ServerSocket srv = new ServerSocket(port);

// Wait for connection from client.
Socket socket = srv.accept();
System.out.println("Hello&quot

;
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
wr.write("Content-Type: text/html\r\n&quot

;
wr.write("<HTTP><BODY>OK</BODY></HTTP>&quot

;
wr.flush();
}
catch (IOException e) {
}

}

}

My i-explorer probe is:
htt://localhost:10000

The browser found nothing, and my class MyHttpServer write "Hello".
Why?
Is this method of work correct? or is this a barbarism?

Thanks.

sedj · Nov 20, 2003

You need to close your Socket :

socket.close();

after you flush the stream at line wr.flush();

seanmceligot · Nov 20, 2003

You need at least the following:

1. Wait for the web browser to send an empty line signaling it is done with its request.

2. Send HTTP/1.1 200 OK as first line of response.

3. You need an empty line between headers and html.

Code:

import java.net.*;
import java.io.*;

public class MyHttpServer {
    
  /** Creates a new instance of MyHttpServer */
  public MyHttpServer() {
  }
  public void run()
  {
    try
    {
      int port = 10000;
      ServerSocket srv = new ServerSocket(port);

      // Wait for connection from client.
      Socket socket = srv.accept();
      BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      String line = in.readLine();
      while( (line != null) && (line.length() > 0) ) {
        System.out.println(&quot;client: &quot;+line);
        line = in.readLine();
      }

      BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
      wr.write(&quot;HTTP/1.1 200 OK\n&quot;);
      wr.write(&quot;Content-Type: text/html\n&quot;);
      wr.write(&quot;\n&quot;);
      wr.write(&quot;<HTTP><BODY>OK</BODY></HTTP>\n&quot;);
      wr.flush();
      wr.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) throws Exception {
    new MyHttpServer().run();
  }

}

Sean McEligot

sedj · Nov 20, 2003

If you don't close the socket, or explicaitly call socket.shutdownOutputStream() you won't see a response. Just closing the output stream is not enough to get a response on the browser.

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HTTP head 2

Mausolo

Programmer

sedj

Programmer

seanmceligot

Programmer

sedj

Programmer

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