Proxy error when using OAuth2 gem - ruby

Question

Hi I’m trying to use oauth 2 to connect my app to a local API.
The authorization request succeed and return me a code on my callback address to make the access token request.
Here is my callback code :
def client
OAuth2::Client.new(KEY, SECRET, site: SITE, authorize_url: '/oauth2/auth', token_url: 'http://localhost:8080/oauth2/token')
end
get '/auth/callback' do
access_token = client.auth_code.get_token(params[:code], "redirect_uri" => redirect_uri)
access_token = session[:access_token] = access_token.token
#access_token = access_token
end
In get_token function, I made a pry to check my connection configuration (which is correct):
1.9.3 (#<OAuth2::Client:0x007fb255183e18>):0 > connection
=> #<Faraday::Connection:0x007fb2551817f8
#parallel_manager=nil,
#headers={"User-Agent"=>"Faraday v0.9.0"},
#params={}, #options=#<Faraday::RequestOptions (empty)>,
#ssl=#<Faraday::SSLOptions (empty)>,
#default_parallel_manager=nil,
#builder=#<Faraday::RackBuilder:0x007fb255188760
#handlers=[Faraday::Request::UrlEncoded, Faraday::Adapter::NetHttp, Faraday::Response::Logger]>,
#url_prefix=#<URI::HTTP:0x007fb255187b08 URL:http://localhost:3000/>,
#proxy=#<Faraday::ProxyOptions uri=#<URI::HTTP:0x007fb255186b68 URL:http://proxy_url:port>, user="me", password=« MyPassword">>
1.9.3 (#<OAuth2::Client:0x007fb255183e18>):0 > url
=> "http://localhost:8080/oauth2/token »
1.9.3 (#<OAuth2::Client:0x007f9bdb94cce8>):0 > verb
=> :post
1.9.3 (#<OAuth2::Client:0x007f9bdb94cce8>):0 > opts
=> {
:body => {
"client_id" => "Test",
"client_secret" => "test_secret",
"code" => "d3c4661b11ea5e2752852db72e1ce100f2f1804d",
"grant_type" => "authorization_code",
"redirect_uri" => "http://localhost:4567/auth/callback"
},
:headers => {
"Content-Type" => "application/x-www-form-urlencoded"
},
:parse => nil,
:raise_errors => true
}
Debug informations from request :
I, [2014-08-20T12:01:19.450941 #12792] INFO -- : post http://localhost:8080/oauth2/token
D, [2014-08-20T12:01:19.451040 #12792] DEBUG -- request: User-Agent: "Faraday v0.9.0"
Content-Type: "application/x-www-form-urlencoded"
I, [2014-08-20T12:01:19.451203 #12792] INFO -- Status: 401
D, [2014-08-20T12:01:19.451258 #12792] DEBUG -- response: cache-control: "no-cache"
pragma: "no-cache"
www-authenticate: "NTLM, BASIC realm=\"OUR_DOMAIN_NAME\""
content-type: "text/html; charset=utf-8"
proxy-connection: "close"
set-cookie: "BCSI-CS-925062b0249dae29=2; Path=/"
connection: "close"
content-length: "706"
x-rbt-optimized-by: "riv-olo (RiOS 8.5.1) IK"
OAuth2::Error - Nice page from my proxy telling me that I’m not authentified on the domain
When I make a POST request with POSTMAN REST Client using my authorization code, everything is fine and the API return me an access_token.
I don’t understand why the request is passing by the proxy because all my apps and API are on my localhost.
Could someone tell me why this error append using my local app ?
Thanks

Answer 1

As my postman request worked and not those of my app, I used Wireshark to see the difference between them.
In Oauth, my proxy parameters were used by default. So my request went on the proxy IP.
And on Postman, requests went directly on localhost.
So I changed my client definition to force empty proxy parameters :
PROXY_URI = ''
PROXY_USER = ''
PROXY_PASSWORD = ''
def client
OAuth2::Client.new(KEY, SECRET, site: SITE, authorize_url: '/oauth2/auth', token_url: 'http://localhost:8080/oauth2/token', connection_opts: {
:proxy => {:uri => PROXY_URI,
:user => PROXY_USER,
:password => PROXY_PASSWORD}})
end
Now request are send to localhost as expected.
It's ok for local tests, but now I'll need to make conditional assignment of my proxy variables.
Why the GET method were sent to localhost and not POST method ? It's still a mystery !

Answer 2

It sounds like you're trying to hit localhost via your proxy, which won't work. If you're using OS X:
Go to System Preferences > Network.
Select the connection you're using on the left (eg. "Wi-Fi" or "Ethernet").
Click "Advanced..." at the bottom right.
Go to the "Proxies" tab.
In the box at the bottom ("Bypass proxy settings"), add 127.0.0.1, localhost.
Click "OK", then "Apply".
Once you've done that, OS X shouldn't route requests to localhost via your proxy, and Postman should work fine.