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import java.net.*;
import java.io.*;
import java.util.*;
public class RequestProcessor implements Runnable {
private static List pool = new LinkedList();
private File do*****entRootDirectory;
private String indexFileName = "index.html";
public RequestProcessor(File do*****entRootDirectory,
String indexFileName) {
if (do*****entRootDirectory.isFile()) {
throw new IllegalArgumentException(
"do*****entRootDirectory must be a directory, not a file");
}
this.do*****entRootDirectory = do*****entRootDirectory;
try {
this.do*****entRootDirectory
= do*****entRootDirectory.getCanonicalFile();
}
catch (IOException ex) {
}
if (indexFileName != null) this.indexFileName = indexFileName;
}
public static void processRequest(Socket request) {
synchronized (pool) {
pool.add(pool.size(), request);
pool.notifyAll();
}
}
public void run() {
// for security checks
String root = do*****entRootDirectory.getPath();
while (true) {
Socket connection;
synchronized (pool) {
while (pool.isEmpty()) {
try {
pool.wait();
}
catch (InterruptedException ex) {
}
}
connection = (Socket) pool.remove(0);
}
try {
String filename;
String contentType;
OutputStream raw = new BufferedOutputStream(
connection.getOutputStream()
);
Writer out = new OutputStreamWriter(raw);
Reader in = new InputStreamReader(
new BufferedInputStream(
connection.getInputStream()
),"ASCII"
);
StringBuffer requestLine = new StringBuffer();
int c;
while (true) {
c = in.read();
if (c == '\r' || c == '\n') break;
requestLine.append((char) c);
}
String get = requestLine.toString();
// log the request
System.out.println(get);
StringTokenizer st = new StringTokenizer(get);
String method = st.nextToken();
String version = "";
if (method.equals("GET")) {
filename = st.nextToken();
if (filename.endsWith("/")) filename += indexFileName;
contentType = guessContentTypeFromName(filename);
if (st.hasMoreTokens()) {
version = st.nextToken();
}
File theFile = new File(do*****entRootDirectory,
filename.substring(1,filename.length()));
if (theFile.canRead()
// Don't let clients outside the do*****ent root
&& theFile.getCanonicalPath().startsWith(root)) {
DataInputStream fis = new DataInputStream(
new BufferedInputStream(
new FileInputStream(theFile)
)
);
byte[] theData = new byte[(int) theFile.length()];
fis.readFully(theData);
fis.close();
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 200 OK\r\n");
Date now = new Date();
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP/1.0\r\n");
out.write("Content-length: " + theData.length + "\r\n");
out.write("Content-type: " + contentType + "\r\n\r\n");
out.flush();
} // end if
// send the file; it may be an image or other binary data
// so use the underlying output stream
// instead of the writer
raw.write(theData);
raw.flush();
} // end if
else { // can't find the file
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 404 File Not Found\r\n");
Date now = new Date();
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP/1.0\r\n");
out.write("Content-type: text/html\r\n\r\n");
}
out.write("<HTML>\r\n");
out.write("<HEAD><TITLE>File Not Found</TITLE>\r\n");
out.write("</HEAD>\r\n");
out.write("<BODY>");
out.write("<H1>HTTP Error 404: File Not Found</H1>\r\n");
out.write("</BODY></HTML>\r\n");
out.flush();
}
}
else { // method does not equal "GET"
if (version.startsWith("HTTP ")) { // send a MIME header
out.write("HTTP/1.0 501 Not Implemented\r\n");
Date now = new Date();
out.write("Date: " + now + "\r\n");
out.write("Server: JHTTP 1.0\r\n");
out.write("Content-type: text/html\r\n\r\n");
}
out.write("<HTML>\r\n");
out.write("<HEAD><TITLE>Not Implemented</TITLE>\r\n");
out.write("</HEAD>\r\n");
out.write("<BODY>");
out.write("<H1>HTTP Error 501: Not Implemented</H1>\r\n");
out.write("</BODY></HTML>\r\n");
out.flush();
}
}
catch (IOException ex) {
}
finally {
try {
connection.close();
}
catch (IOException ex) {}
}
} // end while
} // end run
public static String guessContentTypeFromName(String name) {
if (name.endsWith(".html") || name.endsWith(".htm")) {
return "text/html";
}
else if (name.endsWith(".txt") || name.endsWith(".java")) {
return "text/plain";
}
else if (name.endsWith(".gif")) {
return "image/gif";
}
else if (name.endsWith(".class")) {
return "application/octet-stream";
}
else if (name.endsWith(".jpg") || name.endsWith(".jpeg")) {
return "image/jpeg";
}
else return "text/plain";
}
} // end RequestProcessor
/**
* Java Network Programming, Third Edition
* By Elliotte Rusty Harold
* Third Edition October 2004
* ISBN: 0-596-00721-3
*/
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References.
The list of classes which were used on this page you can find below. The
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