def gs_url_signer(self):
"""On demand instance of CloudStorageURLSigner object."""
if not self._gs_url_signer:
settings = config.settings()
self._gs_url_signer = gcs.URLSigner(settings.gs_bucket,
settings.gs_client_id_email,
settings.gs_private_key)
return self._gs_url_signer
def get(self, namespace, hash_key): #pylint: disable=W0221
logging.error('Unexpected old client')
# Parse 'Range' header if it's present to extract initial offset.
# Only support single continuous range from some |offset| to the end.
offset = 0
range_header = self.request.headers.get('range')
if range_header:
match = re.match(r'bytes=(\d+)-', range_header)
if not match:
return self.send_error('Unsupported byte range.\n\'%s\'.' %
range_header,
http_code=416)
offset = int(match.group(1))
memcache_entry = memcache.get(hash_key,
namespace='table_%s' % namespace)
if memcache_entry is not None:
self.send_data(memcache_entry, filename=hash_key, offset=offset)
stats.add_entry(stats.RETURN,
len(memcache_entry) - offset, 'memcache')
return
entry = model.get_entry_key(namespace, hash_key).get()
if not entry:
return self.send_error('Unable to retrieve the entry.',
http_code=404)
if entry.content is not None:
self.send_data(entry.content, filename=hash_key, offset=offset)
stats.add_entry(stats.RETURN,
len(entry.content) - offset, 'inline')
return
# Generate signed download URL.
settings = config.settings()
# TODO(maruel): The GS object may not exist anymore. Handle this.
signer = gcs.URLSigner(settings.gs_bucket, settings.gs_client_id_email,
settings.gs_private_key)
# The entry key is the GS filepath.
signed_url = signer.get_download_url(entry.key.id())
# Redirect client to this URL. If 'Range' header is used, client will
# correctly pass it to Google Storage to fetch only subrange of file,
# so update stats accordingly.
self.redirect(signed_url)
stats.add_entry(stats.RETURN, entry.compressed_size - offset,
'GS; %s' % entry.key.id())
