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plusfeed.py
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plusfeed.py
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import sys
import re
import logging
import simplejson as json
from cgi import escape
from datetime import datetime
from datetime import timedelta
from time import mktime
from time import sleep
from string import Template
from htmlentitydefs import name2codepoint
from os import environ
from google.appengine.ext import webapp
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.api import urlfetch
from google.appengine.api import memcache
td = timedelta(hours=7)
allurls = re.compile(r'/(.*)')
idurls = re.compile(r'109914082636860229151')
remtags = re.compile(r'<.*?>')
remspaces = re.compile(r'\s+')
commas = re.compile(',,',re.M)
se_break = re.compile('[.!?:]\s+', re.VERBOSE)
charrefpat = re.compile(r'&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?')
HTTP_DATE_FMT = "%a, %d %b %Y %H:%M:%S GMT"
ATOM_DATE = "%Y-%m-%dT%H:%M:%SZ"
homepagetext = """
<html>
<head>
<title>PlusFeed - Unofficial Google+ User Feeds</title>
<link rel="stylesheet" type="text/css" href="/style.css">
<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
</head>
<body>
<div id="gb">
<span>$countmsg</span>
<a href="http://plus.google.com">Google+</a>
</div>
<div id="header">
<h1>PlusFeed</h1>
<h2>Unofficial Google+ User Feeds</h2>
<span id="plusone"><g:plusone size="tall"></g:plusone></span>
</div>
<div id="content">
<div id="intro">
<h2>
Want a <span class="stress">feed</span> for your Google+ posts?
</h2>
<div id="inst">
<p>
Simply add a Google+ user number to the end of this site's URL to get an Atom feed of <em>public</em> posts.
</p>
<p>
Example: <a href="$base_url/104961845171318028721">$base_url/<strong>104961845171318028721</strong></a>
</p>
<p>
<br/>
You can grab the source for this app on GitHub <a href="https://github.com/russellbeattie/plusfeed">here</a>.
</p>
<p>
<em>Originally created by <a href="http://www.russellbeattie.com">Russell Beattie</a></em>
</p>
</div>
</div>
</div>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-24604146-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</body>
</html>
"""
homepage = Template(homepagetext)
noitemstext = """<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>No Public Items Found</title>
<link href="https://plus.google.com/$p" rel="alternate"></link>
<link href="$base_url/$p" rel="self"></link>
<id>https://plus.google.com/$p</id>
<updated>$up</updated>
<entry>
<title>No Public Items Found</title>
<link href="http://plus.google.com/$p"/>
<id>https://plus.google.com/$p</id>
<updated>$up</updated>
<summary>Google+ user $p has not made any posts public.</summary>
</entry>
</feed>
"""
noitems = Template(noitemstext)
class MainPage(webapp.RequestHandler):
def get(self, p):
res = self.response
out = res.out
if p == '':
self.doHome()
return
if p == 'showall':
posts = memcache.get('posts')
for k,post in sorted(posts.iteritems(), reverse=True):
out.write('<p>' + str(k) + ': <a href="' + post['permalink'] + '">Posted on ' + (post['updated'] - td).strftime('%B %d, %Y - %I:%M %p') + ' PST by ' + post['author'] + '</a> <br/>' + post['title'] + '</p>\n')
return
if p == 'reset':
memcache.flush_all()
out.write('reset')
return
if idurls.match(p):
# Rate Limit check
ip = environ['REMOTE_ADDR']
now = datetime.today()
req_count = None
try:
req_count = memcache.incr(ip)
except:
req_count = None
#logging.info(str(ip) + ' - ' + str(req_count))
if req_count:
if req_count > 60:
logging.debug('rate limited - returning 403 - ' + str(req_count))
res.set_status(403)
out.write('<h1>403</h1> Forbidden: Rate limit exceeded - 60 request per minute maximum. #' + str(req_count))
return
#if req_count > 20:
# logging.debug('rate limited - pausing 2 seconds - ' + str(req_count))
# sleep(2)
else:
memcache.set(ip, 1, 60)
# If Modified Since check
if 'If-Modified-Since' in self.request.headers:
try:
ud = memcache.get('time_' + p)
uds = datetime.strftime(ud, HTTP_DATE_FMT)
ud = datetime.strptime(uds, HTTP_DATE_FMT)
last_seen = datetime.strptime(self.request.headers['If-Modified-Since'], HTTP_DATE_FMT)
if ud and last_seen and ud <= last_seen:
logging.debug('returning 304')
res.set_status(304)
return
except:
sys.exc_clear()
op = memcache.get(p)
if op is not None:
logging.debug('delivering from cache')
res.headers['Content-Type'] = 'application/atom+xml'
out.write(op)
return
self.doFeed(p)
return
# No matches
self.error(404)
out.write('<h1>404 Not Found</h1>')
def doHome(self):
res = self.response
out = res.out
msg = ''
list = memcache.get('list')
if list:
msg = ' Serving ' + str(len(list)) + ' feeds in the past 24 hours';
base_url = self.request.application_url
out.write(homepage.substitute(countmsg = msg, base_url = base_url))
def doFeed(self, p):
res = self.response
out = res.out
try:
logging.debug('re-requesting feed')
url = 'https://plus.google.com/_/stream/getactivities/' + p + '/?sp=[1,2,"' + p + '",null,null,null,null,"social.google.com",[]]'
result = ''
try:
result = urlfetch.fetch(url, deadline=10)
except urlfetch.Error:
try:
result = urlfetch.fetch(url, deadline=10)
except urlfetch.Error:
self.error(500)
out.write('<h1>500 Server Error</h1><p>' + str(err) + '</p>')
logging.error(err)
return
if result.status_code == 200:
base_url = self.request.application_url
txt = result.content
txt = txt[5:]
txt = commas.sub(',null,',txt)
txt = commas.sub(',null,',txt)
txt = txt.replace('[,','[null,')
txt = txt.replace(',]',',null]')
obj = json.loads(txt)
posts = obj[1][0]
if not posts:
#self.error(400)
#out.write('<h1>400 - No Public Items Found</h1>')
logging.debug('No public feeds found')
res.headers['Content-Type'] = 'application/atom+xml'
updated = datetime.today()
upstr = updated.strftime(ATOM_DATE)
out.write(noitems.substitute(up = upstr,
p = p,
base_url = base_url))
return
author = posts[0][3]
authorimg = 'https:' + posts[0][18]
updated = datetime.fromtimestamp(float(posts[0][5])/1000)
feed = '<?xml version="1.0" encoding="UTF-8"?>\n'
feed += '<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">\n'
feed += '<title>' + author + ' - Google+ User Feed</title>\n'
feed += '<link href="https://plus.google.com/' + p + '" rel="alternate"></link>\n'
feed += '<link href="' + base_url + '/' + p + '" rel="self"></link>\n'
feed += '<id>https://plus.google.com/' + p + '</id>\n'
feed += '<updated>' + updated.strftime(ATOM_DATE) + '</updated>\n'
feed += '<author><name>' + author + '</name></author>\n'
count = 0
for post in posts:
count = count + 1
if count > 10:
break
dt = datetime.fromtimestamp(float(post[5])/1000)
id = post[21]
permalink = "https://plus.google.com/" + post[21]
desc = ''
if post[47]:
desc = post[47]
elif post[4]:
desc = post[4]
if post[44]:
desc = desc + ' <br/><br/><a href="https://plus.google.com/' + post[44][1] + '">' + post[44][0] + '</a> originally shared this post: ';
if post[66]:
if post[66][0][1]:
desc = desc + ' <br/><br/><a href="' + post[66][0][1] + '">' + post[66][0][3] + '</a>'
if post[66][0][6]:
if post[66][0][6][0][1].find('image') > -1:
desc = desc + ' <p><img src="http:' + post[66][0][6][0][2] + '"/></p>'
else:
try:
desc = desc + ' <a href="' + post[66][0][6][0][8] + '">' + post[66][0][6][0][8] + '</a>'
except:
sys.exc_clear()
if desc == '':
desc = permalink
ptitle = self.htmldecode(desc)
ptitle = remtags.sub(' ', ptitle)
ptitle = remspaces.sub(' ', ptitle)
sentend = 75
m = se_break.split(ptitle)
if m:
sentend = len(m[0]) + 1
if sentend < 5 or sentend > 75:
sentend = 75
feed += '<entry>\n'
feed += '<title>' + escape(ptitle[:sentend]) + '</title>\n'
feed += '<link href="' + permalink + '" rel="alternate"></link>\n'
feed += '<updated>' + dt.strftime(ATOM_DATE) + '</updated>\n'
feed += '<id>tag:plus.google.com,' + dt.strftime('%Y-%m-%d') + ':/' + id + '/</id>\n'
feed += '<summary type="html">' + escape(desc) + '</summary>\n'
feed += '</entry>\n'
feed += '</feed>\n'
memcache.set(p, feed, 15 * 60)
memcache.set('time_' + p, updated)
mlist = memcache.get('list')
if mlist:
if p not in mlist:
mlist.append(p)
else:
mlist = []
mlist.append(p)
memcache.set('list', mlist, 60 * 60 * 24)
res.headers['Last-Modified'] = updated.strftime(HTTP_DATE_FMT)
res.headers['Content-Type'] = 'application/atom+xml'
out.write(feed)
else:
self.error(404)
out.write('<h1>404 - Not Found</h1>')
logging.debug(p + ' Not Found')
except Exception, err:
self.error(500)
out.write('<h1>500 Server Error</h1><p>' + str(err) + '</p>')
logging.error(err)
def htmldecode(self, text):
if type(text) is unicode:
uchr = unichr
else:
uchr = lambda value: value > 255 and unichr(value) or chr(value)
def entitydecode(match, uchr=uchr):
entity = match.group(1)
if entity.startswith('#x'):
return uchr(int(entity[2:], 16))
elif entity.startswith('#'):
return uchr(int(entity[1:]))
elif entity in name2codepoint:
return uchr(name2codepoint[entity])
else:
return match.group(0)
return charrefpat.sub(entitydecode, text)
####
application = webapp.WSGIApplication([(r'/(.*)', MainPage)],debug=True)
def main():
run_wsgi_app(application)
if __name__ == "__main__":
main()