python script for starring and liking google reader items from exported json (used to migrate starred and liked items), check http://gaute.vetsj.com/greader for web app version.

.gitignore

*.json
*.xml
token*
oauth*

staritems.py

#! python2
#
# Gaute Hope <eg@gaute.vetsj.com> 2011
#
# Note: This script was only made to serve its purpose one time, and is not
# necessarily very user friendly. But have been used with success migrating
# Google Reader data to a Google Apps account.
#
# Stars and likes items in Google Reader, used to migrate starred
# and liked items from old account to new. Subscriptions already
# transferred using OPML, json acquired using the export functionality
# on original account.
#
# First: Create a secret API key for this application. Since this is not
#        provided as a service, but run stand alone, you are the provider
#        and need a secret key!
#        See: https://accounts.google.com/ManageDomains
#
#        This does work on Google Apps, but enable the Webmaster Tools
#        Service and add service (domain) and generate key through there.
#
#        Store key in file oauth_key and secret in file oauth_secret (or edit
#        script below).
#
# Place files:
# - starred-items.json
# - liked-items.json
#
# in same folder as script and run with python2. You will have to grant access
# to this program for your account. Click on printed url, and when done
# press enter in this program.
#
# Resources:
#  - http://asktherelic.com/2010/04/26/accessing-google-reader-via-oauth-and-python/
#  - http://blog.martindoms.com/2010/01/20/using-the-google-reader-api-part-3/#item-editing
#  - http://code.google.com/p/google-api-python-client/wiki/OAuth2

import os
import os.path
import json
import sys

import urlparse
import urllib
import oauth2 as oauth

scope = 'http://www.google.com/reader/api'
sub_url = '%s/0/subscription/list?output=json' % scope
starred_url = '%s/0/stream/contents/user/-/state/com.google/starred?output=json' % scope
reading_url = '%s/0/stream/contents/user/-/state/com.google/reading-list?output=json' % scope

# google auth
request_token_url = "https://www.google.com/accounts/OAuthGetRequestToken?scope=%s" % scope
authorize_url = 'https://www.google.com/accounts/OAuthAuthorizeToken'
access_token_url = 'https://www.google.com/accounts/OAuthGetAccessToken'

f = open ('oauth_key', 'r')
oauth_key = f.read ().strip ()
f.close ()

f = open ('oauth_secret', 'r')
oauth_secret = f.read ().strip ()
f.close ()

consumer = oauth.Consumer (oauth_key, oauth_secret)


print "Authorzing with Google Reader.."
if not (os.path.exists('token') and os.path.exists('token_secret')):
  client = oauth.Client (consumer)

# Requesting token
  print "Request token.."
  resp, content = client.request (request_token_url, 'GET')
  request_token = dict(urlparse.parse_qsl (content))
  print "Oauth Token: ", request_token['oauth_token']
  print "Oauth Token secret: ", request_token['oauth_token_secret']

# Authorize in browser
  print "=> Open this link in a browser..:"
  print "%s?oauth_token=%s" % (authorize_url, request_token['oauth_token'])

  print
  print "Press ENTER when ready.."
  raw_input ()



# Get access token
  token = oauth.Token (request_token['oauth_token'], request_token['oauth_token_secret'])
  client = oauth.Client (consumer, token)

  resp, content = client.request(access_token_url, 'POST')
  access_token = dict(urlparse.parse_qsl (content))
  print "Access token:"
  print "Oauth token: ", access_token['oauth_token']
  print "Oauth secret token: ", access_token['oauth_token_secret']

# Writing token
  print "Writing token to file.."
  f = open ('token', 'w')
  f.write (access_token['oauth_token'])
  f.close ()
  oauth_token = access_token['oauth_token']

  f = open ('token_secret', 'w')
  f.write (access_token['oauth_token_secret'])
  f.close ()
  oauth_token_secret = access_token['oauth_token_secret']

else:
# Reading token from file
  print "Reading token from file.."
  f = open ('token', 'r')
  oauth_token = f.read ()
  f.close ()

  f = open ('token_secret', 'r')
  oauth_token_secret = f.read ()
  f.close ()

  print "Token: ", oauth_token
  print "Token secret: ", oauth_token_secret

token = oauth.Token (oauth_token, oauth_token_secret)
client = oauth.Client (consumer, token)

# Trying to get subscriptions..
print "Testing token..",
resp, content = client.request (sub_url, 'GET')
subs = json.loads (content)
if 'subscriptions' in subs:
  print "Token alright."
else:
  print "Token wrong, could not get subscriptions."
  sys.exit (1)

# Getting starred items..
print "Remotely starred items:"
resp, content = client.request (starred_url, 'GET')
stars = json.loads (content)
for i in stars['items']:
  print "[*]", i['title']

### Starred items
starred = open ('starred-items.json', 'r')
items = json.load (starred)
starred.close ()

## Getting edit token
print "Getting edit token.."
token_url = '%s/0/token?client=scroll' % scope
resp, content = client.request (token_url, 'GET')
oauth_token_edit = content

for i in items['items']:
  print "=> Starring: ", i['title'], "..",

  url  = '%s/0/edit-tag?client=scroll' % scope
  data = 'a=user/-/state/com.google/starred&async=true&s=%(sid)s&i=%(id)s&T=%(token)s' % { 'sid' : i['origin']['streamId'], 'id' : i['id'], 'token' : oauth_token_edit }

  resp, content = client.request (url, 'POST', body = data)
  if resp['status'] == '200':
    print 'done.'
  else:
    print 'failed.'

print "Liking items.."
liked = open ('liked-items.json', 'r')
items = json.load (liked)

for i in items['items']:
  print "=> Liking: ", i['title'], "..",

  url  = '%s/0/edit-tag?client=scroll' % scope
  data = 'a=user/-/state/com.google/like&async=true&s=%(sid)s&i=%(id)s&T=%(token)s' % { 'sid' : i['origin']['streamId'], 'id' : i['id'], 'token' : oauth_token_edit }

  resp, content = client.request (url, 'POST', body = data)
  if resp['status'] == '200':
    print 'done.'
  else:
    print 'failed.'

Very useful for moving from a Gmail account to a Google Apps account. Thanks.