- From: Bruce Sherwood <bruce.sherwood@gmail.com>
- Date: Thu, 26 Apr 2012 09:46:27 -0600
- To: public-webapps@w3.org
(My apologies if this appears twice, but it looks like my original posting got lost in the process of subscribing.) I've searched unsuccessfully for more help on enabling CORS in a Python-based Google App Engine web site. I want to enable cross-origin access to a folder containing jpeg files (to be used as textures in a WebGL application). What I found as an example for an enable script is this (where I've added the import line; the name of the Python file is enablecors.py): ------------------------------------------------ from google.appengine.ext import webapp class CORSEnabledHandler(webapp.RequestHandler): def get(self): self.response.headers.add_header("Access-Control-Allow-Origin", "*") self.response.headers['Content-Type'] = 'text/csv' self.response.out.write(self.dump_csv()) ------------------------------------------------ I'm guessing that my app.yaml file should have an entry like the following, where the folder /untrusted/testimages contains the ".jpg" files: - url: /untrusted/testimages/.* script: ide/enablecors.py Because there is some documentation that implies that the GAE will by default do the right thing based on the ".jpg" file extension, I'm guessing that I can (should?) comment out the last two lines of the little Python program. But if that's not the case, I'm guessing that the next-to-the last statement should be self.response.headers['Content-Type'] = 'image/jpeg' But then would should the final statement be? A minor point: I tried to say - url: /untrusted/testimages/.* static_dir: untrusted/testimages script: ide/enablecors.py because I thought that was the right way to handle images, but the GAE launcher complains about this. I'd really appreciate some very explicit details on how to set this up, as none of the various permutations I've tried have worked. The context is GlowScript (glowscript.org), which allows even nonexpert programmers to write JavaScript or CoffeeScript programs to generate 3D animations using WebGL. The programs are developed in the cloud and can run in the cloud, but one can export the code to one's own web site. In that case, however, CORS needs to be enabled so that when the program runs outside glowscript.org the program can still get at the images stored at glowscript.org. Bruce Sherwood
Received on Friday, 27 April 2012 10:32:15 UTC