Is forcetk accessible in Communities

Question

I am using forcetk to upload files (as Attachment records) in a VisualForce Page and it works fine. But when I access same page in a Community, I am not able to upload the file as I am getting the "503 Service Unavailable" in console. Is this proxy is accessible in communities?

Answer 1

You can retrieve the URL of the Community reliably using the following Apex (and return it to the client using @AuraEnabled or @RemoteAction):

URL.getOrgDomainUrl().toExternalForm();

Then append the proxy/service endpoint to use in ForceTK or an XHR as your normally would

Answer 2

I have a solution for this if you are willing to edit your copy of forcetk.js https://github.com/developerforce/Force.com-JavaScript-REST-Toolkit/blob/master/forcetk.js

find function: forcetk.Client.prototype.setSessionToken leave it as is but at the end add:

this.instanceUrl = 'your community url';
this.proxyUrl = null;
this.visualforce = false;

This is a hack, there are ways to clean this up better, but this is the least intrusive modification I could pull off quickly.

I originally was using jsforce (which handles this nicely). Unfortunately, jsforce currently doesn't support IE9 so that's why I am here :)

Answer 3

If you want the same Visualforce page to work in both a Community and outside a community, you need to construct the correct instance URL and proxy URL:

var elements = location.hostname.split(".");
var instance = (elements.length == 3) ? elements[0] : elements[1];
// Are we on a Community page?
var baseURL = '{!$Site.BaseUrl}' || null;
var proxy = '/services/proxy';
var instanceURL =  baseURL || ('https://' + instance + '.salesforce.com');
var proxyURL = baseURL ? (baseURL + proxy) : proxy;

var client = new forcetk.Client();
client.setSessionToken('{!$Api.Session_ID}', 'v35.0', instanceURL);
client.proxyUrl = proxyURL;