Undocumented Max Length For Urlfetch Url?

I have an App Engine app that tries to fetch a long url. After experimenting it seems that for some reason App Engine limits the length of fetched urls to 2047. This is the stack t

Solution 1:

This is an already reported issue which may be addressed in future. So I guess you have to just wait for now, or use some form of URL shortening (yuck).

You can see the issue here and the related stack question here.

In short, that limit was added to the stub to match the implementation on GAE so at least you found this issue quickly. I have no idea why it is limited.