CloudMonitoring: switch from ApplyRoute to AuthMiddleware (#40787)

pkg/tsdb/cloudmonitoring/httpclient.go

@@ -0,0 +1,56 @@
+package cloudmonitoring
+
+import (
+	"net/http"
+
+	"github.com/grafana/grafana-google-sdk-go/pkg/tokenprovider"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
+	infrahttp "github.com/grafana/grafana/pkg/infra/httpclient"
+)
+
+var cloudMonitoringRoute = struct {
+	path   string
+	method string
+	url    string
+	scopes []string
+}{
+	path:   "cloudmonitoring",
+	method: "GET",
+	url:    "https://monitoring.googleapis.com",
+	scopes: []string{"https://www.googleapis.com/auth/monitoring.read"},
+}
+
+func getMiddleware(model *datasourceInfo) (httpclient.Middleware, error) {
+	providerConfig := tokenprovider.Config{
+		RoutePath:         cloudMonitoringRoute.path,
+		RouteMethod:       cloudMonitoringRoute.method,
+		DataSourceID:      model.id,
+		DataSourceUpdated: model.updated,
+		Scopes:            cloudMonitoringRoute.scopes,
+	}
+
+	var provider tokenprovider.TokenProvider
+	switch model.authenticationType {
+	case gceAuthentication:
+		provider = tokenprovider.NewGceAccessTokenProvider(providerConfig)
+	case jwtAuthentication:
+		providerConfig.JwtTokenConfig = &tokenprovider.JwtTokenConfig{
+			Email:      model.clientEmail,
+			URI:        model.tokenUri,
+			PrivateKey: []byte(model.decryptedSecureJSONData["privateKey"]),
+		}
+		provider = tokenprovider.NewJwtAccessTokenProvider(providerConfig)
+	}
+
+	return tokenprovider.AuthMiddleware(provider), nil
+}
+
+func newHTTPClient(model *datasourceInfo, opts httpclient.Options, clientProvider infrahttp.Provider) (*http.Client, error) {
+	m, err := getMiddleware(model)
+	if err != nil {
+		return nil, err
+	}
+
+	opts.Middlewares = append(opts.Middlewares, m)
+	return clientProvider.New(opts)
+}