Force 'text/plain' rendering for HTML, CSS, and JS sample files.

chrome/common/extensions/docs/server/chromeextensionsdocs.py

 #!/usr/bin/python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import cgi
 import logging
 import re
 import os
 
@@ skipping 58 matching lines @@
         url = url[0] % branch
       else:
         url = url[0]
       logging.info("Path: " + self.request.path)
       logging.info("Url: " + url)
       try:
         result = urlfetch.fetch(url)
         if result.status_code != 200:
           logging.error("urlfetch failed: " + url)
           # TODO(nickbaum): what should we do when the urlfetch fails?
+        # Files inside of samples should be rendered with content-type
+        # text/plain so that their source is visible when linked to. The only
+        # types we should serve as-is are images.
+        if (path.startswith("/examples") and
+            not (result.headers['content-type'].startswith('image/') or
+                 result.headers['Content-Type'].startswith('image/'))):
+          result.headers['content-type'] = 'text/plain'
       except:
         logging.error("urlfetch failed: " + url)
         # TODO(nickbaum): what should we do when the urlfetch fails?
       try:
         if not memcache.add(path, result, DEFAULT_CACHE_TIME):
           logging.error("Memcache set failed.")
       except:
         logging.error("Memcache set failed.")
     for key in result.headers:
       self.response.headers[key] = result.headers[key]
@@ skipping 176 matching lines @@
   ('/.*', MainPage),
 ], debug=False)
 
 
 def main():
   run_wsgi_app(application)
 
 
 if __name__ == '__main__':
   main()