Uploading file to Facebook from Salesforce

Question

I'm trying to upload an image file to Facebook from Salesforce and current this is my codes and it is not working can anyone help me fix it?

Please Note that my Image file is inside the Accounts Notes & Attachments

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I tested the string that I use for salesforcephoto and it Uploaded something onto Facebook using the Facebook Graph API explorer

Save Session for the Facebook Graph API Explorer Click Here

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The String I use for salesforcephoto

String salesforcephoto = 'https://c.ap4.content.force.com/servlet/servlet.ImageServer?file='+lstRelatedAttach[0].Id+'&oid=' + orgid ;

The Codes are

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Debug Log Errors

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Redirecting to login page

Currently this my link I'm using for my testing and it will redirect me to the login page instead of showing the image.

https://c.ap4.content.force.com/servlet/servlet.FileDownload?file=00P6F00001G81jz&oid=00D6F000001vFKh

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I have tested this other link but it will give me an error message

https://c.ap4.content.force.com/servlet/servlet.ImageServer?id=00P6F00001G81jz&oid=00D6F000001vFKh

Answer 1

I need to add the file to the a document folder before I can access the url at other locations

Answer 2

The first thing that stands out to me is that you have that url for the salesforce document added directly as a query string parameter, when you should url encode it first:

...'/Photos?url=' + EncodingUtil.urlEncode(salesforcephoto, 'UTF-8');

Also the format of the salesforce document url should be something like:

https://c.ap4.content.force.com/servlet/servlet.ImageServer?id=<id>&oid=<oid>&lastMod=1490673363000

Where <id> is the id of the document, and <oid> is the id of you org. I believe the lastMod param is optional.

That other url with the resource at /servlet/servlet.FileDownload?file= is for the same image, but requires login.