Coldfusion Facebook Graph API publish to your wall and your friends walls

In this tutorial we will learn by full coldfusion Graph API code example how to publish on your wall and your friends walls. This application uses new oauth authentication method.

The code is divided into four files: we will first start with a file called index.cfm:

<cfoutput>    
    <!--- Your FB application IDS --->
      <cfset api_key = ""/>
    <cfset secret_key = ""/>
    <cfset appID = ""/>
    <!--- create a connection to the fb graph cfc --->
    <cfset graphCFC = createObject("component", "graph").init(#appID#, #api_key#, #secret_key#) />
    <!--- If user is authenticated or his access token is set create a cookie --->   

    <cfif not isdefined("cookie.access_token") and isdefined("url.access_token")>
        <cfset cookie.access_token=url.access_token>
    </cfif>

    <!--- If the user is authenticated and access token is set, then make the action of the form the same page else go and authenticate the user and get the access token from Facebook API --->
    <cfif isdefined("cookie.access_token")>
        <cfset action="index.cfm">
    <cfelse>
        <cfset action="login.cfm"> <!--- login page will be discussed after this code --->
    </cfif>
    <h3> Write to Wall on FaceBook </h3>
    <form action="#action#" method="post">
        <textarea cols="55" rows="3" name="msg"></textarea>
        <input type="submit" value="Update Status" />
    </form>
    <cfif isdefined("form.msg")>
        <cfset session.msg=form.msg>
    </cfif>
    <cfif isdefined("session.msg") and isdefined("cookie.access_token")>
     <cftry>
     <!--- Publish to Your Wall (me) The logged in user wall. A call to publish to wall method which is defined in Graph.cfc component--->
      <cfset publish=graphCFC.publishToWall("me",#cookie.access_token#,#session.msg#,"img.jpg","http://blog.abusalah.info","Testing,Graph API","New Interface with Coldfusion","desc")>
      <!--- Publish to A friend Wall here I want to publish to certain friend --->
      <cfset friends=graphCFC.getFriends('me',#cookie.access_token#)>
      <cfset aFriends=friends.data>
      <cfloop from="1" to="#arraylen(aFriends)#" index="i">
          <cfif aFriends[i].name is "">
        <cfset uid=#aFriends[i].id#>
        <cfbreak>
        </cfif>
      </cfloop>
      <cfif isdefined("uid")>
            <cfset publish=graphCFC.publishToWall(#uid#,#cookie.access_token#,#session.msg#,"img.jpg","http://blog.abusalah.info","Testing,Graph API","New Interface with Coldfusion","desc")>
              
      </cfif>
      <cfset StructDelete(session, "msg")>
       Status Updated successfuly.
     <cfcatch type="any">
     Sorry something wrong happend #cfcatch.Message#
     </cfcatch>
     </cftry>       
    </cfif>
</cfoutput>

The login.cfm file which is used to contact Facebook Graph API for Authentication:

<cfoutput>
      <!--- Your FB application IDS --->
      <cfset api_key = ""/>
    <cfset secret_key = ""/>
    <cfset appID = ""/>
    <!--- Create a session variable to store the status, this is the form variable from index.cfm from --->
    <cfif isdefined("form.msg")>
        <cfset session.msg=form.msg>
    </cfif>
    <!--- Check if the user is Authenticated with Facebook, if not authenticate him, ask for permissions and create a variable called code that fetches the access token --->

    <cflocation url="https://graph.facebook.com/oauth/authorize?client_id=#appID#&redirect_uri=http://blog.abusalah.info/fb/release1/login1.cfm&scope=offline_access,read_stream,publish_stream" addtoken="no">

</cfoutput>

Now login1.cfm will get the access token:



<!--- Your FB application IDS --->
<cfset api_key = ""/>
<cfset secret_key = ""/>
<cfset appID = ""/>
<cfif isdefined("url.code")>
    <!--- Get the access token from FB --->
    <cfhttp url="https://graph.facebook.com/oauth/access_token" result="login1">
        <cfhttpparam name="client_id" value="#appID#" encoded="no" type="url">
        <cfhttpparam name="redirect_uri" value="http://www.sms4all.info/fb/release1/login1.cfm" encoded="no" type="url">
        <cfhttpparam name="client_secret" value="#secret_key#" encoded="no" type="url">
        <cfhttpparam name="code" value="#url.code#" encoded="no" type="url">
    </cfhttp>
    <!--- now back to the application with the access token --->
    <cflocation url="index.cfm?#login1.filecontent#" addtoken="no">
</cfif>

Finally the Graph.cfc Class where the main ColdFusion Graph APIs:

<cfcomponent output="false">

    <cffunction name="init">
        <cfargument name="appID" required="true" type="string">
        <cfargument name="api_key" required="true" type="string">
        <cfargument name="secret_key" required="true" type="string">

        <!--- init global variables --->       
        <cfset variables.appID = arguments.appID />
        <cfset variables.api_key = arguments.api_key />
        <cfset variables.secret_key = arguments.secret_key />
       
        <cfreturn this />
    </cffunction>
    <!--- Publish to Wall Method --->
    <cffunction name="publishToWall">
        <cfargument name="uid" required="true" type="string">
        <cfargument name="access_token" required="true" type="string">
        <cfargument name="message" required="true" type="string">
        <cfargument name="picture" required="true" type="string">
        <cfargument name="link" required="true" type="string">
        <cfargument name="name" required="true" type="string">
        <cfargument name="caption" required="true" type="string">
        <cfargument name="description" required="true" type="string">
       
        <cfhttp url="https://graph.facebook.com/#uid#/feed" result="publish" method="post">
            <cfhttpparam name="access_token" value="#access_token#" encoded="no" type="url">
              <cfhttpparam name="message" value="#message#" encoded="no" type="url">
            <cfhttpparam name="picture" value="#picture#" encoded="no" type="url">
            <cfhttpparam name="link" value="#link#" encoded="no" type="url">
            <cfhttpparam name="name" value="#name#" encoded="no" type="url">
            <cfhttpparam name="caption" value="#caption#" encoded="no" type="url">
            <cfhttpparam name="description" value="#description#" encoded="no" type="url">
        </cfhttp>
    </cffunction>
    <!--- Method returns a struct of Friends --->
    <cffunction name="getFriends" access="public" output="true" returntype="any" hint="gets all of a user's friends">
        <cfargument name="uid" required="true" type="string">
        <cfargument name="access_token" required="true" type="string">
        <cfset friends = "" />
        <!--- Get FB User Friends. Friends Information allowed by the user are stored in a struct after deserialized from JSON--->
        <cfhttp url="https://graph.facebook.com/#uid#/friends?access_token=#access_token#" result="friends" />   
        <cfif IsJSON(friends.filecontent)>
            <cfreturn DeserializeJSON(friends.filecontent) />
        <cfelse>
            <cfreturn 0/>
        </cfif>
    </cffunction>
      
</cfcomponent>

A full working example can be found here (Ramadan Greetings)