Instagram embed code from url (Rails)

Question

In my application, I would like to allow user introduce a url of instagram, and then automatically retrieve the embed code of it.

I found this reference: https://www.instagram.com/developer/embedding/#oembed

When I try the given example (https://api.instagram.com/oembed?url=http://instagr.am/p/fA9uwTtkSN) in my Chrome browser, I get the json with the code I am looking for.

However, if I try this from the rails console:

Net::HTTP.get_response(URI("https://api.instagram.com/oembed?url=http://instagr.am/p/fA9uwTtkSN"))

I get this:

#<Net::HTTPMovedPermanently 301 MOVED PERMANENTLY readbody=true> 

I saw that instagram have a new API, but I don't want to make user authenticate from instagram.

Is there a way to do it?

Answer 1

Using the docs

def fetch(uri_str, limit = 10)
  # You should choose a better exception.
  raise ArgumentError, 'too many HTTP redirects' if limit == 0

  response = Net::HTTP.get_response(URI(uri_str))

  case response
  when Net::HTTPSuccess then
    response
  when Net::HTTPRedirection then
    location = response['location']
    warn "redirected to #{location}"
    fetch(location, limit - 1)
  else
    response.value
  end
end

str = "https://api.instagram.com/oembed?url=http://instagr.am/p/fA9uwTtkSN"
response = fetch(str)
redirected to https://api.instagram.com/publicapi/oembed/?url=http://instagr.am/p/fA9uwTtkSN
redirected to https://www.instagram.com/publicapi/oembed/?url=http://instagr.am/p/fA9uwTtkSN
redirected to https://api.instagram.com/oembed/?url=http://instagr.am/p/fA9uwTtkSN
=> #<Net::HTTPOK 200 OK readbody=true>

response.body
=> # JSON response

So just follow the redirects.