def serve_static_file(filename):
"""Serve static content (images, fonts, etc) referred to in .css/.js."""
# Protect against exposing /etc/passwd!
if '..' in filename or filename.startswith('/'):
flask.abort(404)
abspath = project_root.join(filename)
try:
response = flask.send_file(abspath, add_etags=False)
# Let's add last-modified here.
response.last_modified = os.path.getmtime(abspath)
# Apparently make_conditional() has to happen after last-modified
# is set? So we can't just pass conditional=True to send_file.
# cf. https://github.com/mitsuhiko/flask/issues/637
response.make_conditional(flask.request)
# Firefox refuses to load fonts if we don't set a CORS header.
# Let's do that. In fact, let's set it for all content that
# it makes sense for: javascript and fonts (for firefox).
cors_extensions = ('.otf', '.woff', 'woff2', '.eot', '.ttf', # fonts
'.svg', '.js', '.css')
if filename.endswith(cors_extensions):
response.headers.add('Access-Control-Allow-Origin', '*')
return response
except IOError:
flask.abort(404)
def ping():
"""Simple handler used to check if the server is running.
If 'genfiles' arg is specified, only respond with a 200 if our
genfiles dir is the same as the specified one.
See: kake.server_client.start_server
"""
if flask.request.args.get('genfiles'):
if project_root.join('genfiles') != flask.request.args.get('genfiles'):
flask.abort(400)
return
return flask.Response('pong', mimetype='text/plain')
def serve_sourcemap(filename):
"""The sourcemap is automatically created along with its file."""
# This forces the .map file to get made too, if filename has one.
non_map_response = serve_genfile(filename)
# We'll say the .map file was last modified when its corresponding
# .js/.css file was.
last_modified_time = non_map_response.headers['Last-modified']
abspath = project_root.join('genfiles', filename + '.map')
try:
with open(abspath) as f:
content = f.read()
except (IOError, OSError):
flask.abort(404)
# The consensus is that sourcemap files should have type json:
# http://stackoverflow.com/questions/18809567/what-is-the-correct-mime-type-for-min-map-javascript-source-files
response = flask.Response(content, mimetype='application/json')
_add_caching_headers(response, last_modified_time)
# TODO(jlfwong): We always return a 200 for sourcemap files, when really we
# should be returning a 304 sometimes based on the If-Modified-Since
# header, like we do for non-sourcemap files.
return response