Ask your programmer to write a servlet that reads the image and writes it to
the output stream (ServletResponse.getOutputStream()). They should call
ServletResponse.setContentType("image/jpeg") before they write (or whatever
the MIME type is--image/png, image/gif, etc.).I recommend they also check the value returned by ServletResponse.getBufferSize() and read/write the image in chunks that size. If getBufferSize() returns zero, I use 8K chunks. On Tue, Sep 13, 2011 at 1:21 PM, Jeffrey Janner <jeffrey.jan...@polydyne.com > wrote: > Assume Tomcat 6/Java 6 and must be OS agnostic. > > Our app currently is not distributable as a war file due to some decisions > made long ago (properties files that need to be modified stored in WEB-INF, > etc.). I have found ways to work around most of the issues, mostly > involving moving things from properties files or web.xml to the context.xml > file. However, there is one sticking point that is a problem. > We allow the end user to replace a JPG file with one of their own, so that > it gets displayed on certain pages instead of the default one we provide (a > logo file). It currently resides in a sub-directory of the exploded war > file. Rather than have the customer replace the file after every upgrade, I > thought it would be nice to somehow define a location where the file exists, > and the app could go get it when requested (sort of like a sym-link). I > don't have a problem making the location a path to a directory that contains > the file and then have it send from there if the file exists, like a > sym-link to the directory. And I am sure I can get the developers to change > the code to reference the new location (It currently resides in a directory > with a lot of other graphics). Also, the app is backended by a DB that > supports BLOBS, so that could possibly be another possiblility. > > I am open to lots of suggestions and wonder if anyone has done this before. > Also interested in potential security issues. > > As a windows example: http://somedomain.com/app/cust_graphics/logo.jpgwill be > delivered from C:/Program Files/mycompany/Customized > information/logo.jpg. > > > __________________________________________________________________________ > > Confidentiality Notice: This Transmission (including any attachments) may > contain information that is privileged, confidential, and exempt from > disclosure under applicable law. If the reader of this message is not the > intended recipient you are hereby notified that any dissemination, > distribution, or copying of this communication is strictly prohibited. > > If you have received this transmission in error, please immediately reply > to the sender or telephone (512) 343-9100 and delete this transmission > from your system. > -- "Hell hath no limits, nor is circumscrib'd In one self-place; but where we are is hell, And where hell is, there must we ever be" --Christopher Marlowe, *Doctor Faustus* (v, 121-24)
