DNS_PROBE_FINISHED_BAD_CONFIG about oauth2

[scrogson]

Hi @ponty96 can you please provide some context for this error?

[ponty96]

Yeah. So I'm using that example and I'm trying to implement Google Oauth. So when I visit http://localhost:4000/google it redirects to the a Google URL and I get that error on the page. Which I should instead get the page where I sign in to google

[scrogson]

I just tried the example app and it worked fine for me. The error you are getting seems unrelated to the example app or this library.

Did you export the necessary environment variables for you Google application for use in the example app?

If not, they are:

GOOGLE_CLIENT_ID="<your-client-id>"
GOOGLE_CLIENT_SECRET="<your-client-secret>"
GOOGLE_REDIRECT_URI="http://lvh.me:4000/auth/google/callback"

Other than that, I'm not sure what else it could be.

Doing a quick search for the error you provided lead me to this post: http://www.incrediblelab.com/dns-probe-finished-bad-config-error-fixed/

Not sure if that helps...let me know.

[ponty96]

yeah. it was a silly error from my end

[ponty96]

But I'm getting this now, this is after I accept on the google authorize page and i'm using the same credentials for the javascript client which is working

[tsubery]

@ponty96 If I remember correctly, google requires different credentials for different clients (front/backend). When you create new credentials, they ask what type of client do you need it for. You can try creating new credentials and see if that works.

[ponty96]

@tsubery I've tried doing that... Same issue

[johannesE]

I might have the same issue with github:
After getting the token, my client looks like this:
pry(1)> client
%OAuth2.Client{authorize_url: "https://github.com/login/oauth/authorize", client_id: "foo", client_secret: "foo", headers: [], params: %{}, redirect_uri: "http://localhost:4000/auth/github/callback", site: "https://api.github.com", strategy: GitHub, token: %OAuth2.AccessToken{access_token: "{\"access_token\":\"foo\",\"token_type\":\"bearer\",\"scope\":\"public_repo,user\"}", expires_at: nil, other_params: %{}, refresh_token: nil, token_type: "Bearer"}, token_method: :post, token_url: "https://github.com/login/oauth/access_token"}

When I try a request:
pry(2)> OAuth2.Client.get!(client, "/user").body
"{\"message\":\"Bad credentials\",\"documentation_url\":\"https://developer.github.com/v3\"}"

Might it be, that the access_token is too deply nested? Is it supposed to look like that?

EDIT: After looking through the code, I am pretty sure that it's not supposed to look like this.
The response is used to create a token. It is probably treated as a binary instead of a map.

def new(token) when is_binary(token) do
    new(%{"access_token" => token})
end
def new(response) when is_map(response) do
    {std, other} = Map.split(response, @standard)
...

FYI: I am using the standard OAuth2.Client.get_token!(client(), params, headers) to get my token.

[scrogson]

@johannesE did you set the configuration for the serializers as outlined in the README? It looks like the access token came back fine but wasn't properly parsed.

config :oauth2, :serializers, %{
  "application/json" => Poison
}

[johannesE]

Oh my god, that was it. Sorry for wasting your time. Thank you for the help!

EDIT: To be precise, I had the following in there. It was unable to parse that properly.

config :oauth2, 
  serializers: %{ 
    "application/vnd.api+json" => Poison, 
    #"application/xml" => MyApp.XmlParser, 
  } 

After removing the vnd.api+, it worked.