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Fetching Facebook Friends using Windows Azure Mobile Services


This tutorial shows you how to fetch Facebook Friends if you have Facebook accessToken.

Here is the the code for Scheduled task called getFriends

function getFriends() {
//Name of the table where accounts are stored
var accountTable = tables.getTable('FacebookAccounts');

//Name of the table where friends are stored
var friendsTable = tables.getTable('Friends');
checkAccounts();
function checkAccounts(){
accountTable
.read({success: function readAccounts(accounts){
if (accounts.length){
for (var i = 0; i < accounts.length; i++){
console.log("Creating query");
//Call createQuery function for all of the accounts that are found
createQuery(accounts[i], getDataFromFacebook);
}
} else {
console.log("Didn't find any account");
prepareAccountTable();
}
}});
}
function prepareAccountTable(){
var myAccount = {
accessToken: "", //enter here you facebook accessToken. You can retrieve it from http://developers.facebook.com/tools/explorer
name: "Ajay Sharma" //enter here your name
};
//Enter new account into table and then run the code from start when done
accountTable.insert(myAccount, {success: function() { checkAccounts(); }});
}
function getDataFromFacebook(url, name){
console.log("Getting data from facebook. " + url);
var request = require('request');
request(url, function friendsLoaded (error, response, body){
if (!error && response.statusCode == 200){
console.log("Retrieved the data from Facebook");
var results = JSON.parse(body).data;
if (results){
console.log("Parsing succeeded");
results.forEach(function visitResult(friend){
var newFriend = {
//Store friends name, id and fetchers name
name: friend.name,
facebookId: friend.id,
fetcher: name
};
friendsTable.insert(newFriend);
console.log("Added new friend " + friend.name);
})
} else {
console.error("Error on parsing");
}
} else {
console.error(error);
}
});
}
function createQuery(account, callback){
friendsTable
.orderByDescending('facebookId')
.where({
//If there's multiple accounts make sure that checking for right friends
fetcher: account.name
})
.read(
{success: function readFriends(friends){
if (friends.length){
//At least some of the friends already on table. Checking only for the new ones
callback(
"https://graph.facebook.com/me/friends?offset=" + friends.length +
"&access_token=" + account.accessToken,
account.name);
} else {
//No friends stored yet so receiving all of them
callback(
"https://graph.facebook.com/me/friends?limit=10&access_token=" + account.accessToken,
account.name);
}
}}
);
}
}

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