Set full URL path to request header (#1266)

pkg/router/requesthHeader.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2019 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package router
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/gorilla/mux"
+	uuid "github.com/satori/go.uuid"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+const (
+	HEADERS_FISSION_FUNCTION_PREFIX = "Fission-Function"
+)
+
+// setFunctionMetadataToHeaders set function metadatas to request header
+func setFunctionMetadataToHeader(meta *metav1.ObjectMeta, request *http.Request) {
+	request.Header.Set(fmt.Sprintf("X-%s-Uid", HEADERS_FISSION_FUNCTION_PREFIX), string(meta.UID))
+	request.Header.Set(fmt.Sprintf("X-%s-Name", HEADERS_FISSION_FUNCTION_PREFIX), meta.Name)
+	request.Header.Set(fmt.Sprintf("X-%s-Namespace", HEADERS_FISSION_FUNCTION_PREFIX), meta.Namespace)
+	request.Header.Set(fmt.Sprintf("X-%s-ResourceVersion", HEADERS_FISSION_FUNCTION_PREFIX), meta.ResourceVersion)
+}
+
+// setPathInfoToHeaders set URL path params and full URL path to request header
+func setPathInfoToHeader(request *http.Request) {
+	// retrieve url params and add them to request header
+	vars := mux.Vars(request)
+	for k, v := range vars {
+		request.Header.Set(fmt.Sprintf("X-Fission-Params-%v", k), v)
+	}
+	request.Header.Set("X-Fission-Full-Url", request.URL.String())
+}
+
+// setRecordRequestIDHeader set record ID to request header
+func setRecordRequestIDHeader(recorderName string, request *http.Request) {
+	if len(recorderName) > 0 {
+		reqUID := "REQ" + strings.ToLower(uuid.NewV4().String())
+		request.Header.Set("X-Fission-ReqUID", reqUID)
+	}
+}