When no results found, the CORS headers are not added to response

[volkanunsal]

Good example is this url:

http://codeforamerica.org/api/projects?category=123

Not only does this return a 500 error in the console, the CORS headers are not added to the response either.

[volkanunsal]

I see that the actual parameter should be categories. But still, not returning CORS headers and throwing a 500 error is bad.

[tmaybe]

This stackoverflow comment seems to describe the issue, I'll see if I can figure out a solution that doesn't require a Flask extension.