Want to access server

Question

I have the following web server and want to access it from a client but am not sure how. I was just wondeing if anyone could help. I know I have to type into IE on the client the following:
http://localhost."port number"/"file name"
I am unsure as how to type in the file name and I am using 80 as the port number which I think is right. I am also typing this into the client which is the other PC on my network. Here is my server code:
import java.io.*;
import java.net.*;
import java.util.*;
class WebServer
     public static void main(String[] args) throws Exception
          String requestMessageLine;
          String fileName;
          ServerSocket listenSocket = new ServerSocket(80);
          Socket connectionSocket = listenSocket.accept();
BufferedReader inFromClient =
                    new BufferedReader(new InputStreamReader(
          connectionSocket.getInputStream()));
          DataOutputStream outToClient = new DataOutputStream(
          connectionSocket.getOutputStream());
          requestMessageLine = inFromClient.readLine();
          StringTokenizer tokenizedLine =
               new StringTokenizer(requestMessageLine);
               if (tokenizedLine.nextToken().equals("GET"))
                    fileName = tokenizedLine.nextToken();
                    if ( fileName.startsWith("/")==true )
                         fileName = fileName.substring(1);
                    File file = new File(fileName);
                    int numOfBytes = (int)file.length();
                    FileInputStream inFile = new FileInputStream(fileName);
                    byte[] fileInBytes = new byte[numOfBytes];
                    inFile.read(fileInBytes);
                    /* Send the HTTP header */
                    outToClient.writeBytes("HTTP/1.1 200 Document Follows\r\n");
                    if (fileName.endsWith(".jpg"))
                         outToClient.writeBytes("Content-Type: image/jpeg\r\n");
                    if (fileName.endsWith(".gif"))
                         outToClient.writeBytes("Content-Type: image/gif\r\n");
                    outToClient.writeBytes("Content-Length: " + numOfBytes + "\r\n");
                    outToClient.writeBytes("\r\n");
                    /* Now send the actual data */
                    outToClient.write(fileInBytes, 0, numOfBytes);
                    connectionSocket.close();
               else
               System.out.println("Bad Request Message");

Answer 1

Currently your code looks for the file in the current directory. You might want to change that to something like
import java.io.*;
import java.net.*;
import java.util.*;
class WebServer
     /* Define the root directory, where web pages are stored */
     static String webRoot = System.getProperty("user.dir")+File.separator+"webRoot";
     public static void main(String[] args) throws Exception
          String requestMessageLine;
          String fileName;
          ServerSocket listenSocket = new ServerSocket(80);
          Socket connectionSocket = listenSocket.accept();
          BufferedReader inFromClient
               = new BufferedReader
                    (new InputStreamReader( connectionSocket.getInputStream() ));
          DataOutputStream outToClient
               = new DataOutputStream( connectionSocket.getOutputStream() );
          requestMessageLine = inFromClient.readLine();
          StringTokenizer tokenizedLine = new StringTokenizer(requestMessageLine);
          System.out.println(requestMessageLine);
          if (tokenizedLine.nextToken().equals("GET"))
               fileName = tokenizedLine.nextToken();
               /* check for file existence */
               File file = new File(webRoot+fileName);
               if ( !file.exists() )
                    outToClient.writeBytes("HTTP/1.1 400 Document not found\r\n");
                    return;
               int numOfBytes = (int)file.length();
               FileInputStream inFile = new FileInputStream(file);
               byte[] fileInBytes = new byte[numOfBytes];
               inFile.read(fileInBytes);
               /* Send the HTTP header */
               outToClient.writeBytes("HTTP/1.1 200 Document Follows\r\n");
               if (fileName.endsWith(".jpg"))
                    outToClient.writeBytes("Content-Type: image/jpeg\r\n");
               if (fileName.endsWith(".gif"))
                    outToClient.writeBytes("Content-Type: image/gif\r\n");
               outToClient.writeBytes("Content-Length: " + numOfBytes + "\r\n");
               outToClient.writeBytes("\r\n");
               /* Now send the actual data */
               outToClient.write(fileInBytes, 0, numOfBytes);
               connectionSocket.close();
          else
               System.out.println("Bad Request Message");
}