Instagram API with Rails

This article introduce about API of Instagram. After reading this artile, you will know:

  • Overview about Instagram API.

  • How to interacte with Instagram API.

  • How to use this API in Rails application.

1. Introduction to the Instagram API

Instagram is a sharing-application, social networking service which enables users to take pictures and videos, and share them on a variety of social networks.

It was acquired by Facebook in April 2012 for approximately $1 billion in cash and stock. [1]

Instagram API support to we a interface to interact with data from Instagram.

2. How to interact with Instagram API

To start using the API, we have 3 basic step:

  • Register.
  • Authenticate.
  • Make request data.

 

            Source: InstagramAPI

 

2.1 Register your application on Instagram API

Go to the Manage Clients to register a new Client: Manage Clients

After registering, we have information about: Client ID and Client Secret which will be used to authenticate in next step.

 

2.2 Authentication (Client-Side)

Authenticated requests require an access_token. These tokens are unique to a user and should be stored securely. Access tokens may expire at any time in the future.

In order to receive access_token, we have to do 2 steps:

Step 1: Direct your user to our authorization URL

Access to URL with format: 

https://instagram.com/oauth/authorize/?client_id=CLIENT-ID&redirect_uri=REDIRECT-URI&response_type=token

Step 2: Receive the access_token via the URL fragment

After we have authenticated and then authorized your application, Instagram redirects them to your redirect_uri with the access_token in the url fragment. It will look like this: 

http://your-redirect-uri#access_token=ACCESS-TOKEN

 

2.3 Start making request to Instagram data

When we authorized application, now we can be able to interact with Instagram API Endpoints.

Endpoints allows we interact with data about: Users, Media, Comments, Likes, Tags, Locations and more.

In next section,  I’ll demo a Rails application using Media Endpoints of Instagram API.

3. Application in Rails

In this section, I'll guide you implement a Rails application to get recent media (photos) from Instagram have hashtag is “#fashion”.

Step 1: Add gem 'instagram' (instagram-ruby-gem

This is gem which support a Ruby wrapper for the Instagram REST and Search APIs.

You can get more information in rubydoc-instagram-ruby-gem.

 

Step 2: Add instagram.rb config file in config/initializers.

 Instagram.configure do |config|
  config.client_id     = CLIENT_ID
  config.client_secret = CLIENT_SECRET
  config.access_token  = ACCESS_TOKEN
end

 

Step 3: Write a method to get recent media which tag is 'fashion'

We'll create Photo model with 3 fields are thumbnail_url, owner and link to save data which get from Instagram API.

rails generate model Photo thumbnail_url:string owner:string link:string

To get list of recent media items which have 'fashion' tag, we use tag_recent_media method of instagram-ruby-gem. Details function in below:

class Photo < ActiveRecord::Base
  validates :thumbnail_url, :owner, :link, :presence => true

  def get_recent_media
    recent_media = Instagram.tag_recent_media('fashion')

    recent_media.each do |media|
      Photo.create(
        link: media.link,
        owner: media.caption.from.username,
        thumbnail_url: media.images.thumbnail.url
      )
    end
  end
end

4. Conclusion

I hope so this article helps you quickly learn and interact with Instagram API :)

5. References