Post to Facebook routine needed for pay

Hi,

I know what I said in the subject line may sound easy but there is a catch. I can already post to my own Facebook page using facebook.request method. I need to post to another Facebook page and with the new updates to the graph api I understand that you must use a dialog for this. Well, here is my issue. the picture I want to post is on my device. What I have read is you must give a web url to link a picture that you want to post.

So my request on here is to find out how to post a picture on another Facebook page that is captured by the device’s camera and saved. 

I also read somewhere that if you tag someone then your post will show in their timeline. I know they have to approve them but I think you can set the permissions to accept all tags if you want also (the other person has to do this on their Facebook page that you want to tag). So if the tag works also and i can even do that through a request then the pictures can be posted on my own Facebook page and they will show on the other page’s timeline.

Let me know what solution you can do for this and your best quote.

Thanks!