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#!/usr/bin/python
#
# Copyright (C) 2009 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This file demonstrates how to use the Google Data API's Python client library
# to interface with the Blogger service. There are examples for the following
# operations:
#
# * Retrieving the list of all the user's blogs
# * Retrieving all posts on a single blog
# * Performing a date-range query for posts on a blog
# * Creating draft posts and publishing posts
# * Updating posts
# * Retrieving comments
# * Creating comments
# * Deleting comments
# * Deleting posts
import gdata.blogger.client
import gdata.client
import gdata.sample_util
import gdata.data
import atom.data
class BloggerExample:
def __init__(self):
"""Creates a GDataService and provides ClientLogin auth details to it.
The email and password are required arguments for ClientLogin. The
'source' defined below is an arbitrary string, but should be used to
reference your name or the name of your organization, the app name and
version, with '-' between each of the three values."""
# Authenticate using ClientLogin, AuthSub, or OAuth.
self.client = gdata.blogger.client.BloggerClient()
gdata.sample_util.authorize_client(
self.client, service='blogger', source='Blogger_Python_Sample-2.0',
scopes=['http://www.blogger.com/feeds/'])
# Get the blog ID for the first blog.
feed = self.client.get_blogs()
self.blog_id = feed.entry[0].get_blog_id()
def PrintUserBlogTitles(self):
"""Prints a list of all the user's blogs."""
# Request the feed.
feed = self.client.get_blogs()
# Print the results.
print feed.title.text
for entry in feed.entry:
print "\t" + entry.title.text
print
def CreatePost(self, title, content, is_draft):
"""This method creates a new post on a blog. The new post can be stored as
a draft or published based on the value of the is_draft parameter. The
method creates an GDataEntry for the new post using the title, content,
author_name and is_draft parameters. With is_draft, True saves the post as
a draft, while False publishes the post. Then it uses the given
GDataService to insert the new post. If the insertion is successful, the
added post (GDataEntry) will be returned.
"""
return self.client.add_post(self.blog_id, title, content, draft=is_draft)
def PrintAllPosts(self):
"""This method displays the titles of all the posts in a blog. First it
requests the posts feed for the blogs and then it prints the results.
"""
# Request the feed.
feed = self.client.get_posts(self.blog_id)
# Print the results.
print feed.title.text
for entry in feed.entry:
if not entry.title.text:
print "\tNo Title"
else:
print "\t" + entry.title.text.encode('utf-8')
print
def PrintPostsInDateRange(self, start_time, end_time):
"""This method displays the title and modification time for any posts that
have been created or updated in the period between the start_time and
end_time parameters. The method creates the query, submits it to the
GDataService, and then displays the results.
Note that while the start_time is inclusive, the end_time is exclusive, so
specifying an end_time of '2007-07-01' will include those posts up until
2007-6-30 11:59:59PM.
The start_time specifies the beginning of the search period (inclusive),
while end_time specifies the end of the search period (exclusive).
"""
# Create query and submit a request.
query = gdata.blogger.client.Query(updated_min=start_time,
updated_max=end_time,
order_by='updated')
print query.updated_min
print query.order_by
feed = self.client.get_posts(self.blog_id, query=query)
# Print the results.
print feed.title.text + " posts between " + start_time + " and " + end_time
print feed.title.text
for entry in feed.entry:
if not entry.title.text:
print "\tNo Title"
else:
print "\t" + entry.title.text
print
def UpdatePostTitle(self, entry_to_update, new_title):
"""This method updates the title of the given post. The GDataEntry object
is updated with the new title, then a request is sent to the GDataService.
If the insertion is successful, the updated post will be returned.
Note that other characteristics of the post can also be modified by
updating the values of the entry object before submitting the request.
The entry_to_update is a GDatEntry containing the post to update.
The new_title is the text to use for the post's new title. Returns: a
GDataEntry containing the newly-updated post.
"""
# Set the new title in the Entry object
entry_to_update.title = atom.data.Title(type='xhtml', text=new_title)
return self.client.update(entry_to_update)
def CreateComment(self, post_id, comment_text):
"""This method adds a comment to the specified post. First the comment
feed's URI is built using the given post ID. Then a GDataEntry is created
for the comment and submitted to the GDataService. The post_id is the ID
of the post on which to post comments. The comment_text is the text of the
comment to store. Returns: an entry containing the newly-created comment
NOTE: This functionality is not officially supported yet.
"""
return self.client.add_comment(self.blog_id, post_id, comment_text)
def PrintAllComments(self, post_id):
"""This method displays all the comments for the given post. First the
comment feed's URI is built using the given post ID. Then the method
requests the comments feed and displays the results. Takes the post_id
of the post on which to view comments.
"""
feed = self.client.get_post_comments(self.blog_id, post_id)
# Display the results
print feed.title.text
for entry in feed.entry:
print "\t" + entry.title.text
print "\t" + entry.updated.text
print
def DeleteComment(self, comment_entry):
"""This method removes the comment specified by the given edit_link_href, the
URI for editing the comment.
"""
self.client.delete(comment_entry)
def DeletePost(self, post_entry):
"""This method removes the post specified by the given edit_link_href, the
URI for editing the post.
"""
self.client.delete(post_entry)
def run(self):
"""Runs each of the example methods defined above, demonstrating how to
interface with the Blogger service.
"""
# Demonstrate retrieving a list of the user's blogs.
self.PrintUserBlogTitles()
# Demonstrate how to create a draft post.
draft_post = self.CreatePost('Snorkling in Aruba',
'<p>We had <b>so</b> much fun snorkling in Aruba<p>',
True)
print 'Successfully created draft post: "' + draft_post.title.text + '".\n'
# Delete the draft blog post.
self.client.delete(draft_post)
# Demonstrate how to publish a public post.
public_post = self.CreatePost("Back from vacation",
"<p>I didn't want to leave Aruba, but I ran out of money :(<p>",
False)
print "Successfully created public post: \"" + public_post.title.text + "\".\n"
# Demonstrate various feed queries.
print "Now listing all posts."
self.PrintAllPosts()
print "Now listing all posts between 2007-04-04 and 2007-04-23."
self.PrintPostsInDateRange("2007-04-04", "2007-04-23")
# Demonstrate updating a post's title.
print "Now updating the title of the post we just created:"
public_post = self.UpdatePostTitle(public_post, "The party's over")
print "Successfully changed the post's title to \"" + public_post.title.text + "\".\n"
# Demonstrate how to retrieve the comments for a post.
# Get the post ID and build the comments feed URI for the specified post
post_id = public_post.get_post_id()
print "Now posting a comment on the post titled: \"" + public_post.title.text + "\"."
comment = self.CreateComment(post_id, "Did you see any sharks?")
print "Successfully posted \"" + comment.content.text + "\" on the post titled: \"" + public_post.title.text + "\".\n"
comment_id = comment.GetCommentId()
print "Now printing all comments"
self.PrintAllComments(post_id)
# Delete the comment we just posted
print "Now deleting the comment we just posted"
self.DeleteComment(comment)
print "Successfully deleted comment."
self.PrintAllComments(post_id)
# Demonstrate deleting posts.
print "Now deleting the post titled: \"" + public_post.title.text + "\"."
self.DeletePost(public_post)
print "Successfully deleted post."
self.PrintAllPosts()
def main():
"""The main function runs the BloggerExample application.
NOTE: It is recommended that you run this sample using a test account.
"""
sample = BloggerExample()
sample.run()
if __name__ == '__main__':
main()