authenticate: use gRPC for service endpoints (#39)

* authenticate: set cookie secure as default.
* authenticate: remove single flight provider.
* authenticate/providers: Rename “ProviderData” to “IdentityProvider”
* authenticate/providers: Fixed an issue where scopes were not being overwritten
* proxy/authenticate : http client code removed.
* proxy: standardized session variable names between services.
* docs: change basic docker-config to be an “all-in-one” example with no nginx load.
* docs:  nginx balanced docker compose example with intra-ingress settings.
* license:  attribution for adaptation of goji’s middleware pattern.

authenticate/handlers_test.go

@@ -1,14 +1,12 @@
 package authenticate
 
 import (
-	"bytes"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
 	"testing"
 
-	"github.com/pomerium/pomerium/authenticate/providers"
 	"github.com/pomerium/pomerium/internal/templates"
 )
 
@@ -19,7 +17,6 @@ func testAuthenticate() *Authenticate {
 	auth.AllowedDomains = []string{"*"}
 	auth.ProxyRootDomains = []string{"example.com"}
 	auth.templates = templates.New()
-	auth.provider = providers.NewTestProvider(auth.RedirectURL)
 	return &auth
 }
 
@@ -38,43 +35,5 @@ func TestAuthenticate_RobotsTxt(t *testing.T) {
 	expected := fmt.Sprintf("User-agent: *\nDisallow: /")
 	if rr.Body.String() != expected {
 		t.Errorf("handler returned wrong body: got %v want %v", rr.Body.String(), expected)
-
-	}
-}
-
-func TestAuthenticate_SignInPage(t *testing.T) {
-	auth := testAuthenticate()
-	v := url.Values{}
-	v.Set("request_uri", "this-is-a-test-uri")
-	url := fmt.Sprintf("/signin?%s", v.Encode())
-
-	req, err := http.NewRequest("GET", url, nil)
-
-	if err != nil {
-		t.Fatal(err)
-	}
-	rr := httptest.NewRecorder()
-	handler := http.HandlerFunc(auth.SignInPage)
-	handler.ServeHTTP(rr, req)
-	if status := rr.Code; status != http.StatusOK {
-		t.Errorf("handler returned wrong status code: got %v want %v", status, http.StatusOK)
-	}
-	body := rr.Body.Bytes()
-
-	tests := []struct {
-		name  string
-		value string
-		want  bool
-	}{
-		{"provider name", auth.provider.Data().ProviderName, true},
-		{"destination url", v.Encode(), true},
-		{"shouldn't be found", "this string should not be in the body", false},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := bytes.Contains(body, []byte(tt.value)); got != tt.want {
-				t.Errorf("handler body missing expected value %v", tt.value)
-			}
-		})
 	}
 }