Merge pull request #1573 from GSA/login-gov-proxy

Login gov proxy

lib/challenge_gov/login_gov.ex

@@ -6,17 +6,18 @@ defmodule ChallengeGov.LoginGov do
   use HTTPoison.Base
 
   alias ChallengeGov.LoginGov.Token
+  @proxy_config Application.get_env(:httpoison, :proxy, [])
 
   def get_well_known_configuration(idp_authorize_url) do
     idp_authorize_url
     |> uri_join("/.well-known/openid-configuration")
-    |> get()
+    |> get([], proxy_options())
     |> handle_response("Sorry, could not fetch well known configuration")
   end
 
   def get_public_key(jwks_uri) do
     jwks_uri
-    |> get()
+    |> get([], proxy_options())
     |> handle_response("Sorry, could not fetch public key")
     |> case do
       {:ok, body} -> {:ok, body |> Map.fetch!("keys") |> List.first()}
@@ -33,13 +34,13 @@ defmodule ChallengeGov.LoginGov do
     }
 
     token_endpoint
-    |> post(Poison.encode!(body), [{"Content-Type", "application/json"}])
+    |> post(Poison.encode!(body), [{"Content-Type", "application/json"}], proxy_options())
     |> handle_response("Sorry, could not exchange code")
   end
 
   def get_user_info(userinfo_endpoint, access_token) do
     userinfo_endpoint
-    |> get([{"Authorization", "Bearer " <> access_token}])
+    |> get([{"Authorization", "Bearer " <> access_token}], proxy_options())
     |> handle_response("Sorry, could not fetch userinfo")
   end
 
@@ -122,4 +123,12 @@ defmodule ChallengeGov.LoginGov do
   def process_response_body(body) do
     Poison.decode!(body)
   end
+
+  defp proxy_options do
+    if @proxy_config == [] do
+      []
+    else
+      @proxy_config
+    end
+  end
 end