Problem 2: get today's facebook posting for network

https://developers.facebook.com/docs/graph-api/using-graph-api/v2.5

Graph-API: get data into and out of Facebooks's social graph.

https://developers.facebook.com/docs/graph-api/overview

Essentially, the api is a http get url to returns the graph in the content of the page.

Example call the pictures from your graph http://graph.facebook.com/facebook/picture?redirect=false

For python we can use the urllib to simplify retrieval https://docs.python.org/2.7/howto/urllib2.html



In [2]:

    
import urllib2
response = urllib2.urlopen('http://graph.facebook.com/facebook/picture?redirect=false')
html = response.read()
print html









    



{"data":{"is_silhouette":false,"url":"https:\/\/scontent.xx.fbcdn.net\/hprofile-xta1\/v\/t1.0-1\/p50x50\/12006203_10154088276211729_2432197377106462187_n.png?oh=ee7dbec2c040f09a1732acf3285cd653&oe=56BFFA23"}}

To make this easy you should register as a Facebook Developer at https://developers.facebook.com/apps

Login to you Facebook and acount and register as a developer. You will need to create a app name and setup you security details. Create an App ID, API Version, and AppSecret Store them in file outside your p



In [3]:

    
import urllib2
appSecret="7e141bf4406afafeaa43579d1f2d7fd8"
appId="547808358705887"
requesturl = 'http://graph.facebook.com/oauth/access_token?client_id='+appId+'&client_secret='+appSecret+'&grant_type=client_credentials'
print requesturl
try:
    response = urllib2.urlopen(requesturl)
    html = response.read()
    print html

except IOError, e:
        print 'Failed to open "%s".' % requesturl
        if hasattr(e, 'code'):
            print 'We failed with error code - %s.' % e.code
        elif hasattr(e, 'reason'):
            print "The error object has the following 'reason' attribute :"
            print e.reason
            print "This usually means the server doesn't exist,",
            print "is down, or we don't have an internet connection."









    



http://graph.facebook.com/oauth/access_token?client_id=547808358705887&client_secret=7e141bf4406afafeaa43579d1f2d7fd8&grant_type=client_credentials
Failed to open "http://graph.facebook.com/oauth/access_token?client_id=547808358705887&client_secret=7e141bf4406afafeaa43579d1f2d7fd8&grant_type=client_credentials".
We failed with error code - 400.

However we need access tokens to really use the service. Unlike javascript with is embedded into a browser. Python scripts will be standalone programs that cannot normally share the access in a browser. So let us pull down and use a python sdk to simplify some of the setup. Retrieve and install: https://github.com/pythonforfacebook/facebook-sdk

Use this interface to get a temporary access token https://developers.facebook.com/tools/explorer/



In [21]:

    
#Copied from https://github.com/pythonforfacebook/facebook-sdk/blob/master/examples/get_posts.py
import facebook
import requests

# You'll need an access token here to do anything.  You can get a temporary one
# here: https://developers.facebook.com/tools/explorer/
access_token = 'CAACEdEose0cBANcRP7PXpdeDZBZAZAZBNK0UuZAcAvEHAZB8ZCbyyEWFOlTDeZCb6mwGQCffdbx55Pl3EarMHZBYmH0wcPZBnjYms7qcZA6PNPPp6ITp6TSjtfFMWCNKXAIq3DLobYpj7rC5kV1WrKyasqvkvZBrFEhZCFEPvxheb7YZBR00gjpZCpzwNZA3kMdk7BbhoeK4OAN1ZCBBuleQfnynyWLLgzJDCZBuXqWD0ZD'
# Look at python site.
user = 'python'
def some_action(post):
    """ Here you might want to do something with each post. E.g. grab the
    post's message (post['message']) or the post's picture (post['picture']).
    In this implementation we just print the post's created time.
    """
    print(post['created_time'] + "==================================================")
    print(post['message'])
    print("=========================================================================")
    
    
graph = facebook.GraphAPI(access_token)
#profile = graph.get_object(user)
#print profile
posts = graph.get_object(fields='posts')

while True:
    try:
        # Perform some action on each post in the collection we receive from
        # Facebook.
        [some_action(post=post) for post in posts['message']]
        # Attempt to make a request to the next page of data, if it exists.
        posts = requests.get(posts['paging']['next']).json()
    except KeyError:
        # When there are no more pages (['paging']['next']), break from the
        # loop and end the script.
        break









    



---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-21-a226e3941d29> in <module>()
     21 #profile = graph.get_object(user)
     22 #print profile
---> 23 posts = graph.get_object(fields='posts')
     24 
     25 while True:

TypeError: get_object() takes exactly 2 arguments (1 given)



In [17]:

    
import requests
appSecret="7e141bf4406afafeaa43579d1f2d7fd8"
appId="547808358705887"
r = requests.get('https://graph.facebook.com/oauth/access_token?grant_type=client_credentials&client_id='+appId+'&client_secret='+appSecret)
access_token = r.text.split('=')[0]
print access_token









    



{"error":{"message":"The request is invalid because the app is configured as a desktop app","type":"OAuthException","code":1,"fbtrace_id":"A5lNqY1ioPR"}}



In [ ]: