Uploading photos from Facebook to my app - ruby-on-rails-3

I am using rails3. Is it possible to upload photos from Facebook to my Rails app? Does anyone know of a way to do this.
Please provide me with an example if possible. Thanks.

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How to post programatically to Facebook Marketplace?

I have a need to automate posting listings to Facebook marketplace. I have no clue from where to start. Is there an API ? Any advice please ?
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share a post on linkedIn with react-native

I have an app built in react native in which I need to share a post on linkedIn with predefined content(can be image or text).
I used 'react-native-share' for sharing content on facebook, instagram and twitter but It does not provide the support for LinkedIn. How can I achieve this?
Thanks in advance.
You can try this module
react-native-linkedin
Refer Here
Hope it works !

How to share something on Google plus Via ios app

hi I wanna share something on Google + via my ios app. I could find the way for Facebook and Twitter. But couldnt find any tutorial for Google plus.
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See https://developers.google.com/+/mobile/ios/share/ for complete and official information for how to do this.

Phonegap and SoundCloud API

i'm trying using soundcloud API in Phonegap app, but i'm wondering which is the best practice for letting users signup/login via SoundCloud API and upload music to SoundCloud?
I can't find anything about Phonegap and soundcloud , can you please tell me some best practice and/or resource to follow? Or if it's out there any phonegap plugin for example for soundcloud
thank you.
This phonegap plugin can be used for the auth process:
https://github.com/oauth-io/oauth-phonegap