Getting Session ID in Apex Class

Question

I been trying to get my Session ID Parameters into my Apex class so that I can retrieve a Picture from inside Salesforce and send it out to Facebook.

But I'm not sure why I'm not getting my Session ID Can someone help me?

I been using this 2 posts as reference.

• Getting Session ID from Javascript

• Passing the Javascript Value to Apex Controller

VisualForce Page Code

<apex:page controller="GetChart" showHeader="true" sideBar="true" >
<apex:includeScript value="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.9.1.min.js"/>
<apex:includeScript value="https://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js" />

<script type="text/javascript">

function chk123() { 
jQuery('[id$=myHiddenField]').val('{!GETSESSIONID()}');
passSessionParameters();
}
</script>
<apex:sectionHeader title="Attach Documents"/>

<apex:form enctype="multipart/form-data" id="theform">
<apex:pageMessages />
<apex:pageBlock title="Upload a Attachment">

<apex:inputHidden value="{!myString}" id="myHiddenField"/>


    <apex:actionFunction name="passSessionParameters" action="{!exInt}" rerender="myHiddenField"/>
  <apex:pageBlockButtons >
    <apex:commandButton value="Save" onclick="chk123();"/>


  </apex:pageBlockButtons>

  <apex:includeScript value="/soap/ajax/29.0/connection.js"/>
  <apex:includeScript value="/soap/ajax/29.0/apex.js"/>
  <script type="text/javascript"> 
var __sfdcSessionId = '{!GETSESSIONID()}';
var oResult = sforce.connection.query(query); 
var oDocuments = oResult.getArray('records'); 
</script>

<apex:outputPanel rendered="{!bolClose}">
      <script>
         alert("{!aId}");
         self.close();
         opener.location.href = "/apex/Upload_Attachment?id="+"{!aId}"; 
      </script>
      </apex:outputPanel>
     </apex:pageBlock>
 </apex:form>
 </apex:page>

Apex Class Page

public with sharing class GetChart{

public String aId { get; set; }

public Boolean bolClose { get; set; }

public String objAtt { get; set; }

public String resume { get; set; }

public String intSize { get; set; }

public String strFileName { get; set; }

public String myString {get; set;}

public GetChart(){
    myString = '';
}


public PageReference exInt() {

bolClose = false;

String chart_1 ='https://ap4.salesforce.com/servlet/servlet.ChartServer?r....';

String base64Data;
httprequest req = new httprequest();
req.setEndpoint(chart_2);
req.setmethod('GET');
req.setHeader('Cookie', 'sid=' + myString + ';'); //UserInfo.getSessionId()+ ';');
system.debug('@@sid ' + myString);
system.Debug('@@Session = ' + UserInfo.getSessionId());
http http = new http();
httpresponse res = http.send(req);
Blob image = res.getBodyAsBlob();
base64Data =  EncodingUtil.base64Encode(image);

Document docatt = new Document();
docatt.Name = 'Chart 1.jpg';
docatt.Body = EncodingUtil.base64Decode(base64Data);
docatt.FOLDERID = '42l6F03184wqNi'; //Your folder id
docatt.IsPublic = true;

insert docatt;

return null;

}

}

Answer 1

if you want the session id from javascript then use below code snippent: -

<apex:page >
 <script type="text/javascript">
        var sfdcSessionId = '{!GETSESSIONID()}';
 </script>
</apex:page>

it is working in my DE.

Answer 2

There are restrictions on the usage of the UserInfo.getSessionID() method - if you are calling it during asynchronous apex execution - for example a scheduled job or an @future method, it only returns a blank value. If you haven't considered this already, you might want to, while debugging. Thanks!