Looks like roll your own then!
A few thoughts on the matter - maybe someone could add to them?
It should be easy to map requests for images to a servlet, which can
then find the appropriate image file wherever it might be ( within or
outside the server ). Like this in the web.xml file:
<servlet-mapping>
<servlet-name>servletName</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
?
But how is the image then added to the reponse? Another servlet (
behind the scenes - I am actually using the Spring framework ) is
handling the request/response. Can the request/response be passed to
the image-providing servlet for the images within a page to be written
to the reponse in this kind of way:
// This method is called by the servlet container to process a GET request.
public void doGet(HttpServletRequest req, HttpServletResponse
resp) throws IOException {
// Get the absolute path of the image
ServletContext sc = getServletContext();
String filename = sc.getRealPath("image.gif");
// Get the MIME type of the image
String mimeType = sc.getMimeType(filename);
if (mimeType == null) {
sc.log("Could not get MIME type of "+filename);
resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
// Set content type
resp.setContentType(mimeType);
// Set content size
File file = new File(filename);
resp.setContentLength((int)file.length());
// Open the file and output streams
FileInputStream in = new FileInputStream(file);
OutputStream out = resp.getOutputStream();
// Copy the contents of the file to the output stream
byte[] buf = new byte[1024];
int count = 0;
while ((count = in.read(buf)) >= 0) {
out.write(buf, 0, count);
}
in.close();
out.close();
}
( from http://www.exampledepot.com/egs/javax.servlet/GetImage.html )
I'm off for a walk to mull it over - any suggestions while I am out
and before I get to experimenting will be most welcome.
Thanks,
John
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