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Graham Dumpleton
graham.dumpleton at gmail.com
Thu Mar 19 17:31:03 EDT 2009
2009/3/19 Bart <scarfboy at gmail.com>: > On Thu, Mar 19, 2009 at 4:09 AM, Ron Phelps <rphelps at redshift.com> wrote: >> Trying to get Apache to display an graph plotfile.png but get an error >> >> The website has >> >> index.py with links to >> >> page1.py >> page2.py >> ... >> pagen.py >> >> page1.py calls matplotlib to plot some data retrieved from a database. >> Matplotlib can't write to the www-data root (permissions problem) so I >> have it write to /tmp. >> I then copy the file to the www-data root using pexpect.run('cp >> plotfile.png'). >> However page1.py fails to display the graph. The error is >> "can't find /page1.py/plotfile.png." Page1.py is not a directory >> The file has the owner:group of www-data. >> >> I have verified that the file is in the www-root directory. >> >> Don't know if it is an issue but page1.py has two frames. One which is >> for displaying data. >> >> Is Apache or Mod_python the cause? > > > You seem to have used SetHandler, to hand over control to mod_python > unconditionally (for all URLs). > You also seem to be using mod_python.publisher, which is fine > (although it's a pain with relative URLs), but which won't fall back > to serving files, which things like vampire will do. > > IIRC, you can just use AddHandler to handle only .py URLs via > mod_python (though I'm not sure, I only used publisher briefly and > it's a good while back now). > > A simpler option may be copying those files to a subdirectory and > telling apache "SetHandler none" for it, which gets you basic apache > treatment (in this case for its file serving). > > > By the way, you can have matplotlib serve things via memory, avoiding > the bother of files completely (for most backends, anyway). The following may be of interest if this relates to SetHandler/AddHandler. http://www.dscpl.com.au/wiki/ModPython/Articles/SetHandlerVersusAddHandler Graham
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