Upgrade to 0.12

1 files changed, 51 insertions, 0 deletions

diff --git a/vendor/go.opencensus.io/plugin/ochttp/route.go b/vendor/go.opencensus.io/plugin/ochttp/route.go
new file mode 100644
index 0000000..dbe22d5
--- /dev/null
+++ b/vendor/go.opencensus.io/plugin/ochttp/route.go
@@ -0,0 +1,51 @@
+// Copyright 2018, OpenCensus 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 ochttp
+
+import (
+        "net/http"
+
+        "go.opencensus.io/tag"
+)
+
+// WithRouteTag returns an http.Handler that records stats with the
+// http_server_route tag set to the given value.
+func WithRouteTag(handler http.Handler, route string) http.Handler {
+        return taggedHandlerFunc(func(w http.ResponseWriter, r *http.Request) []tag.Mutator {
+                addRoute := []tag.Mutator{tag.Upsert(KeyServerRoute, route)}
+                ctx, _ := tag.New(r.Context(), addRoute...)
+                r = r.WithContext(ctx)
+                handler.ServeHTTP(w, r)
+                return addRoute
+        })
+}
+
+// taggedHandlerFunc is a http.Handler that returns tags describing the
+// processing of the request. These tags will be recorded along with the
+// measures in this package at the end of the request.
+type taggedHandlerFunc func(w http.ResponseWriter, r *http.Request) []tag.Mutator
+
+func (h taggedHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+        tags := h(w, r)
+        if a, ok := r.Context().Value(addedTagsKey{}).(*addedTags); ok {
+                a.t = append(a.t, tags...)
+        }
+}
+
+type addedTagsKey struct{}
+
+type addedTags struct {
+        t []tag.Mutator
+}