Boston Linux & Unix (BLU) Home | Calendar | Mail Lists | List Archives | Desktop SIG | Hardware Hacking SIG
Wiki | Flickr | PicasaWeb | Video | Maps & Directions | Installfests | Keysignings
Linux Cafe | Meeting Notes | Blog | Linux Links | Bling | About BLU

BLU Discuss list archive


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Dynamic <IMG>



I'm trying to generate some PNG's on the fly, and include them in some
web pages.  The C program I wrote to create them dumps the PNG data
stream to stdout.  I can dump the output to a file and it looks perfect.

I don't want to include a PNG _file_ in an <img> tag, though, because
some stupid browsers cache it, no matter how they're configured.

So, no problem, I think.  Rather than point to a file w/ my <img> tag,
I'll point to the program.  Like <img src="/cgi-bin/tile" alt="blah
blah" width="512" height="512" border=0>.  Doesn't work.  Ownership and
permissions of program o.k. to be run by Apache.

Does /cgi-bin/tile need to output something differently than if it were
simply dumping a PNG to a file? 

I'm confused.  I thought this kind of thing was supposed to work.  No? 
If this is possible, let me know, and I'll keep hacking.  As long as I
know I'm not wasting my time...

-- 


Ron Peterson
Systems Manager
Wallace Floyd Design Group
273 Summer Street
Boston, MA  02210
617.350.7400 tel
617.350.0051 fax
rpeterson at wallacefloyd.com
-
Subcription/unsubscription/info requests: send e-mail with
"subscribe", "unsubscribe", or "info" on the first line of the
message body to discuss-request at blu.org (Subject line is ignored).




BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!



Boston Linux & Unix / webmaster@blu.org