As I expected, on Google App Engine we can't write the cache file
to the current working directory. I modified csv-metadata-quality
CLI to check for the REQUESTS_CACHE_DIR environment variable so we
don't really have to do anything different other than setting the
variable.
This works locally, but I don't think it will work on App Engine
because csv-metadata-quality uses requests-cache and creates the
agrovoc-response-cache.sqlite file in the current working directory.
Re-work upload and file processing so they are in the same Python
function. Now I will start exposing other command line options in
the form, like unsafe fixes, excluding fields, etc. Now I see tha
t it is easier to save the POSTed file and process it in the same
function so I don't have to pass around the other POSTed form val
ues as URL query parameters.
Now, as a result of changing the flow above, I also had to make a
change to the way I show the results page. Instead of processing
the file and returning the rendered results to the user directly,
I process the file, save the rendered results to /tmp, and return
a redirect to the user to the results page.
I originally wanted to use an "uploads" directory or something, but
it seems we can only write to /tmp on Google App Engine. They really
want you to buy storage or database services! This is memory mapped
so it disappears when you re-deploy.
I set this but never actually passed it to the subprocess. Now I'm
wondering if I actually need it, or if that was just when I was tr-
ying to import the csv-metadata-quality module?
Refactor the templates to include a header, use csv-metadata-quality
in a subshell instead of trying to import and pass args to it (which
I actually managed to do, but then trying to capture the output was
an issue), and use ansi2html to prepare the CLI output as the HTML.
Alan Orth