proxy: add route portal json (#5428)

* proxy: add route portal json

* fix 405 issue

* add link to issue

* Update proxy/portal/filter_test.go

Co-authored-by: Kenneth Jenkins <51246568+kenjenkins@users.noreply.github.com>

---------

Co-authored-by: Kenneth Jenkins <51246568+kenjenkins@users.noreply.github.com>

proxy/handlers_portal_test.go

@@ -0,0 +1,51 @@
+package proxy
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/pomerium/pomerium/config"
+	"github.com/pomerium/pomerium/internal/httputil"
+)
+
+func TestProxy_routesPortalJSON(t *testing.T) {
+	ctx := context.Background()
+	cfg := &config.Config{Options: config.NewDefaultOptions()}
+	to, err := config.ParseWeightedUrls("https://to.example.com")
+	require.NoError(t, err)
+	cfg.Options.Routes = append(cfg.Options.Routes, config.Policy{
+		Name:                             "public",
+		Description:                      "PUBLIC ROUTE",
+		LogoURL:                          "https://logo.example.com",
+		From:                             "https://from.example.com",
+		To:                               to,
+		AllowPublicUnauthenticatedAccess: true,
+	})
+	proxy, err := New(ctx, cfg)
+	require.NoError(t, err)
+
+	r := httptest.NewRequest(http.MethodGet, "/.pomerium/api/v1/routes", nil)
+	w := httptest.NewRecorder()
+
+	router := httputil.NewRouter()
+	router = proxy.registerDashboardHandlers(router, cfg.Options)
+	router.ServeHTTP(w, r)
+
+	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Equal(t, "application/json", w.Header().Get("Content-Type"))
+	assert.JSONEq(t, `{"routes":[
+		{
+			"id": "4e71df99c0317efb",
+			"name": "public",
+			"from": "https://from.example.com",
+			"type": "http",
+			"description": "PUBLIC ROUTE",
+			"logo_url": "https://logo.example.com"
+		}
+	]}`, w.Body.String())
+}