OK - here is a little
servlet you can employ....all you do is pass the JSP file reference to it.
This code can be modified to selectively seek the tags you wish to highlight and add the proper CSS class= designation or FONT attributes, etc.
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import java.net.*;
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class JSPSourceServlet extends HttpServlet {
/**
* Handles a GET request by sending the contents of the resource
* specified by the servlet path to the client.
*
* @param req an HttpServletRequest
* @param res an HttpServletResponse
* @exception IOException
*/
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException {
// Get the pathInfo
String path = req.getPathInfo();
// Check for invalid characters in the path
if (path.indexOf("..") != -1 | | path.toUpperCase().indexOf("WEB-INF") != -1) {
res.sendError(HttpServletResponse.SC_FORBIDDEN,
"Illegal characters found in path " + path);
return;
}
sendFile(path, res);
}
/**
* Copies the "in" reader to the "out" writer.
*
* @param in a BufferedReader
* @param out a PrintWriter
*/
private void copyFile(BufferedReader in, PrintWriter out)
throws IOException {
int chars;
char[] buf = new char[4096];
while ((chars = in.read(buf, 0, buf.length)) != -1) {
out.write(buf, 0, chars);
out.flush();
}
}
/**
* Sends the contents of a file to the client.
*
* @param pathInfo the file URI
* @param res an HttpServletResponse
* @exception IOException
*/
private void sendFile(String path, HttpServletResponse res) throws IOException {
String fileName = getServletContext().getRealPath(path);
if (fileName == null) {
res.sendError(HttpServletResponse.SC_NOT_FOUND,
path + " not found.");
return;
}
File file = new File(fileName);
if (file.isDirectory() | | !file.canRead()) {
res.sendError(HttpServletResponse.SC_FORBIDDEN,
"No read access to " + file.getAbsolutePath());
return;
}
res.setStatus(HttpServletResponse.SC_OK);
// Use "text/html" and convert HTML characters to
// character entities, to fool IE as explained above
res.setContentType("text/html");
long lastMod = file.lastModified();
if (lastMod != 0) {
res.setDateHeader("Last-modified", lastMod);
}
PrintWriter out = res.getWriter();
// Add HTML header
out.println("<html><head><title>" + path + "</title></head>");
out.println("<body><pre>");
// Read the file and convert it
BufferedReader in = new BufferedReader(new FileReader(file));
StringWriter rawText = new StringWriter();
copyFile(in, new PrintWriter(rawText));
in.close();
out.write(toHTMLString(rawText.toString()));
// Add HTML footer
out.println("</pre></body></html>");
out.close();
}
}
// convert special characters to browser-safe equivalents
public static String toHTMLString(String in) {
StringBuffer out = new StringBuffer();
for (int i = 0; in != null && i < in.length(); i++) {
char c = in.charAt(i);
if (c == '\'') {
out.append("'");
}
else if (c == '\"') {
out.append(""");
}
else if (c == '<') {
out.append("<");
}
else if (c == '>') {
out.append(">");
}
else if (c == '&') {
out.append("&");
}
else {
out.append(c);
}
}
return out.toString();
}
