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import os
import urllib
import webapp2
import jinja2
from apiclient.discovery import build
from optparse import OptionParser
import json
JINJA_ENVIRONMENT = jinja2.Environment(
loader=jinja2.FileSystemLoader(os.path.dirname(__file__)),
extensions=['jinja2.ext.autoescape'])
REGISTRATION_INSTRUCTIONS = """
You must set up a project and get an API key to run this code. Please see
the instructions for creating a project and a key at <a
href="https://developers.google.com/youtube/registering_an_application"
>https://developers.google.com/youtube/registering_an_application</a>.
<br><br>
Make sure that you have enabled the YouTube Data API (v3) and the Freebase
API for your project."""
# Set API_KEY to the "API key" value from the "Access" tab of the
# Google APIs Console http://code.google.com/apis/console#access
# Please ensure that you have enabled the YouTube Data API and Freebase API
# for your project.
API_KEY = "REPLACE_ME"
YOUTUBE_API_SERVICE_NAME = "youtube"
YOUTUBE_API_VERSION = "v3"
FREEBASE_SEARCH_URL = "https://www.googleapis.com/freebase/v1/search?%s"
QUERY_TERM = "dog"
class MainHandler(webapp2.RequestHandler):
def get(self):
if API_KEY == 'REPLACE_ME':
self.response.write(REGISTRATION_INSTRUCTIONS)
else:
# Present a list of Freebase topic IDs for the query term
self.list_topics(QUERY_TERM)
def list_topics(self, QUERY_TERM):
# Retrieve a list of Freebase topics associated with the query term
freebase_params = dict(query=QUERY_TERM, key=API_KEY)
freebase_url = FREEBASE_SEARCH_URL % urllib.urlencode(freebase_params)
freebase_response = json.loads(urllib.urlopen(freebase_url).read())
if len(freebase_response["result"]) == 0:
exit("No matching terms were found in Freebase.")
# Create a page that shows a select box listing the topics.
# When the user selects a topic and submits the form, the
# 'post' method below will handle the form submission and
# retrieve videos for the selected topic.
select_topic_page = ('''
<html>
<body>
<p>The following topics were found:</p>
<form method="post">
<select name="topic">
''')
for result in freebase_response["result"]:
select_topic_page += ('<option value="' + result["mid"] + '">' +
result.get("name", "Unknown") + '</option>')
select_topic_page += '''
</select>
<p><input type="submit" /></p>
</form>
</body>
</html>
'''
# Display the HTML page listing the topic choices.
self.response.out.write(select_topic_page)
def post(self):
topic_id = self.request.get('topic')
# Service for calling the YouTube API
youtube = build(YOUTUBE_API_SERVICE_NAME,
YOUTUBE_API_VERSION,
developerKey=API_KEY)
# Execute the search request using default query term and retrieved topic.
search_response = youtube.search().list(
part = 'id,snippet',
type = 'video',
topicId = topic_id
).execute()
videos = []
for search_result in search_response.get("items", []):
videos.append(search_result)
template_values = {
'videos': videos
}
self.response.headers['Content-type'] = 'text/html'
template = JINJA_ENVIRONMENT.get_template('index.html')
self.response.write(template.render(template_values))
app = webapp2.WSGIApplication([
('/.*', MainHandler),
], debug=True)