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