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cs654/lab3 part B completed

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git-svn-id: svn://anubis/gvsu@5 45c1a28c-8058-47b2-ae61-ca45b979098e
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josh 2008-02-03 03:15:11 +00:00
parent a82373c0fe
commit 7ec861062f
4 changed files with 169 additions and 0 deletions
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cs654/lab3/HttpRequest.class Normal file
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import java.io.* ;
import java.net.* ;
import java.util.* ;
final class HttpRequest implements Runnable
{
final static String CRLF = "\r\n";
Socket socket;
// Constructor
public HttpRequest(Socket socket) throws Exception
{
this.socket = socket;
}
// Implement the run() method of the Runnable interface.
public void run()
{
try {
processRequest();
} catch (Exception e) {
System.out.println(e);
}
}
private void processRequest() throws Exception
{
// Set up output stream
DataOutputStream os = new DataOutputStream(socket.getOutputStream());
// Set up input stream filters.
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
// Get the request line of the HTTP request message.
String requestLine = br.readLine();
// Extract the filename from the request line.
StringTokenizer tokens = new StringTokenizer(requestLine);
tokens.nextToken(); // skip over the method, which should be "GET"
String fileName = tokens.nextToken();
// Prepend a "." so that file request is within the current directory.
fileName = "." + fileName ;
// Open the requested file.
FileInputStream fis = null ;
boolean fileExists = true ;
try {
fis = new FileInputStream(fileName);
} catch (FileNotFoundException e) {
fileExists = false ;
}
// Debug info for private use
System.out.println("Incoming!!!");
System.out.println(requestLine);
String headerLine = null;
while ((headerLine = br.readLine()).length() != 0) {
System.out.println(headerLine);
}
// Construct the response message.
String statusLine = null;
String contentTypeLine = null;
String entityBody = null;
if (fileExists) {
statusLine = "HTTP/1.0 200 OK" + CRLF;
contentTypeLine = "Content-Type: " +
contentType(fileName) + CRLF;
} else {
statusLine = "HTTP/1.0 404 Not Found" + CRLF;
contentTypeLine = "text/html" + CRLF;
entityBody = "<HTML>" +
"<HEAD><TITLE>Not Found</TITLE></HEAD>" +
"<BODY>Not Found</BODY></HTML>";
}
// Send the status line.
os.writeBytes(statusLine);
// Send the content type line.
os.writeBytes(contentTypeLine);
// Send a blank line to indicate the end of the header lines.
os.writeBytes(CRLF);
// Send the entity body.
if (fileExists) {
sendBytes(fis, os);
fis.close();
} else {
os.writeBytes(entityBody) ;
}
// Close streams and socket.
os.close();
br.close();
socket.close();
}
private static void sendBytes(FileInputStream fis,
OutputStream os) throws Exception
{
// Construct a 1K buffer to hold bytes on their way to the socket.
byte[] buffer = new byte[1024];
int bytes = 0;
// Copy requested file into the socket's output stream.
while ((bytes = fis.read(buffer)) != -1) {
os.write(buffer, 0, bytes);
}
}
private static String contentType(String fileName)
{
if(fileName.endsWith(".htm") || fileName.endsWith(".html")) {
return "text/html";
}
if(fileName.endsWith(".gif")) {
return "image/gif";
}
if (fileName.endsWith(".jpg") || fileName.endsWith(".jpeg"))
{
return "image/jpeg";
}
return "application/octet-stream" ;
}
}

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import java.io.* ;
import java.net.* ;
import java.util.* ;
public final class WebServer
{
private static final int DEFAULT_PORT = 8080;
public static void main(String argv[]) throws Exception
{
// Get the port number from the command line.
int port = (argv.length > 0)
? (new Integer(argv[0])).intValue()
: DEFAULT_PORT;
// Establish the listen socket.
ServerSocket socket = new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while (true)
{
// Listen for a TCP connection request.
Socket connection = socket.accept();
// Construct an object to process the HTTP request message.
HttpRequest request = new HttpRequest(connection);
// Create a new thread to process the request.
Thread thread = new Thread(request);
// Start the thread.
thread.start();
}
}
}