bridgy-fed/add_webmention.py

44 wiersze
1.3 KiB
Python

"""HTTP proxy that injects our webmention endpoint.
"""
import logging
import urllib
import appengine_config
import requests
import webapp2
import common
LINK_HEADER = '<%s>; rel="webmention"'
class AddWebmentionHandler(webapp2.RequestHandler):
"""Proxies HTTP requests and adds Link header to our webmention endpoint."""
def get(self, url):
url = urllib.unquote(url)
if not url.startswith('http://') and not url.startswith('https://'):
common.error(self, 'URL must start with http:// or https://')
try:
resp = common.requests_get(url)
except requests.exceptions.Timeout as e:
common.error(self, unicode(e), status=504, exc_info=True)
except requests.exceptions.RequestException as e:
common.error(self, unicode(e), status=502, exc_info=True)
self.response.status_int = resp.status_code
self.response.write(resp.content)
endpoint = LINK_HEADER % (str(self.request.get('endpoint')) or
appengine_config.HOST_URL + '/webmention')
self.response.headers.clear()
self.response.headers.update(resp.headers)
self.response.headers.add('Link', endpoint)
app = webapp2.WSGIApplication([
('/wm/(.+)', AddWebmentionHandler),
], debug=appengine_config.DEBUG)