feedservice/main.py

   1 from google.appengine.ext import webapp
   2 from google.appengine.ext.webapp.util import run_wsgi_app
   3
   4 import urllib
   5 import feeddownloader
   6 import simplejson as json
   7
   8 class MainPage(webapp.RequestHandler):
   9     def get(self):
  10         self.response.headers['Content-Type'] = 'text/plain'
  11         self.response.out.write('Hello, webapp World!')
  12
  13 class Parse(webapp.RequestHandler):
  14
  15     def post(self):
  16         return self.get()
  17
  18     def get(self):
  19         urls = self.request.get_all('url')
  20         urls = map(urllib.unquote, urls)
  21         inline_logo = self.request.get_range('inline_logo', 0, 1, default=0)
  22         scale_to = self.request.get_range('scale_logo', 0, 1, default=0)
  23         strip_html = self.request.get_range('strip_html', 0, 1, default=0)
  24         modified = self.request.headers.get('If-Modified-Since', None)
  25         accept = self.request.headers.get('Accept', 'application/json')
  26
  27         if urls:
  28             podcasts, last_modified = feeddownloader.parse_feeds(urls, inline_logo, scale_to, strip_html, modified)
  29             self.send_response(podcasts, last_modified, accept)
  30
  31         else:
  32             self.response.set_status(400)
  33             self.response.out.write('parameter url missing')
  34
  35
  36     def send_response(self, podcasts, last_modified, format):
  37         self.response.headers.add_header('Vary', 'Accept')
  38
  39         if 'json' in format:
  40             content_type = 'application/json'
  41             content = json.dumps(podcasts, sort_keys=True, indent=None, separators=(',', ':'))
  42             from email import utils
  43             import time
  44             self.response.headers.add_header('Last-Modified', utils.formatdate(time.mktime(last_modified)))
  45
  46
  47         else:
  48             import cgi
  49             content_type = 'text/html'
  50             pretty_json = json.dumps(podcasts, sort_keys=True, indent=4)
  51             pretty_json = cgi.escape(pretty_json)
  52             content = """<html><head>
  53 <link href="static/screen.css" type="text/css" rel="stylesheet" />
  54 <link href="static/prettify.css" type="text/css" rel="stylesheet" />
  55 <script type="text/javascript" src="static/prettify.js"></script>
  56 </head><body onload="prettyPrint()"><h1>HTML Response</h1><p>This response is HTML formatted. To get just the JSON data for processing in your client, <a href="/#accept">send the HTTP Header <em>Accept: application/json</em></a>. <a href="/">Back to the Documentation</a></p><pre class="prettyprint">%s</pre></body></html>""" % pretty_json
  57
  58         self.response.headers['Content-Type'] = content_type
  59         self.response.out.write(content)
  60
  61
  62 application = webapp.WSGIApplication([
  63                                       ('/',      MainPage),
  64                                       ('/parse', Parse)
  65                                      ],
  66                                      debug=True)
  67
  68 def main():
  69     run_wsgi_app(application)
  70
  71 if __name__ == "__main__":
  72     main()