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- // Copyright 2017 Google LLC
- //
- // 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.
-
- // +build go1.7
-
- package trace_test
-
- import (
- "log"
- "net/http"
-
- "cloud.google.com/go/trace"
- )
-
- var traceClient *trace.Client
-
- func ExampleHTTPClient_Do() {
- client := http.Client{
- Transport: &trace.Transport{},
- }
- span := traceClient.NewSpan("/foo") // traceClient is a *trace.Client
-
- req, _ := http.NewRequest("GET", "https://metadata/users", nil)
- req = req.WithContext(trace.NewContext(req.Context(), span))
-
- if _, err := client.Do(req); err != nil {
- log.Fatal(err)
- }
- }
-
- func ExampleClient_HTTPHandler() {
- handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
- client := http.Client{
- Transport: &trace.Transport{},
- }
-
- req, _ := http.NewRequest("GET", "https://metadata/users", nil)
- req = req.WithContext(r.Context())
-
- // The outgoing request will be traced with r's trace ID.
- if _, err := client.Do(req); err != nil {
- log.Fatal(err)
- }
- })
- http.Handle("/foo", traceClient.HTTPHandler(handler)) // traceClient is a *trace.Client
- }
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