mirror of
https://github.com/Luzifer/nginx-sso.git
synced 2024-10-18 15:44:21 +00:00
78 lines
2.3 KiB
Go
78 lines
2.3 KiB
Go
|
// 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 main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
"net/http"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"go.opencensus.io/zpages"
|
||
|
|
|
||
|
|
"go.opencensus.io/examples/exporter"
|
||
|
|
"go.opencensus.io/plugin/ochttp"
|
||
|
|
"go.opencensus.io/stats/view"
|
||
|
|
"go.opencensus.io/trace"
|
||
|
|
)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// Start z-Pages server.
|
||
|
|
go func() {
|
||
|
|
mux := http.NewServeMux()
|
||
|
|
zpages.Handle(mux, "/debug")
|
||
|
|
log.Fatal(http.ListenAndServe("127.0.0.1:8081", mux))
|
||
|
|
}()
|
||
|
|
|
||
|
|
// Register stats and trace exporters to export the collected data.
|
||
|
|
exporter := &exporter.PrintExporter{}
|
||
|
|
view.RegisterExporter(exporter)
|
||
|
|
trace.RegisterExporter(exporter)
|
||
|
|
|
||
|
|
// Always trace for this demo. In a production application, you should
|
||
|
|
// configure this to a trace.ProbabilitySampler set at the desired
|
||
|
|
// probability.
|
||
|
|
trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
|
||
|
|
|
||
|
|
// Report stats at every second.
|
||
|
|
view.SetReportingPeriod(1 * time.Second)
|
||
|
|
|
||
|
|
client := &http.Client{Transport: &ochttp.Transport{}}
|
||
|
|
|
||
|
|
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
|
||
|
|
fmt.Fprintf(w, "hello world")
|
||
|
|
|
||
|
|
// Provide an example of how spans can be annotated with metadata
|
||
|
|
_, span := trace.StartSpan(req.Context(), "child")
|
||
|
|
defer span.End()
|
||
|
|
span.Annotate([]trace.Attribute{trace.StringAttribute("key", "value")}, "something happened")
|
||
|
|
span.AddAttributes(trace.StringAttribute("hello", "world"))
|
||
|
|
time.Sleep(time.Millisecond * 125)
|
||
|
|
|
||
|
|
r, _ := http.NewRequest("GET", "https://example.com", nil)
|
||
|
|
|
||
|
|
// Propagate the trace header info in the outgoing requests.
|
||
|
|
r = r.WithContext(req.Context())
|
||
|
|
resp, err := client.Do(r)
|
||
|
|
if err != nil {
|
||
|
|
log.Println(err)
|
||
|
|
} else {
|
||
|
|
// TODO: handle response
|
||
|
|
resp.Body.Close()
|
||
|
|
}
|
||
|
|
})
|
||
|
|
log.Fatal(http.ListenAndServe(":50030", &ochttp.Handler{}))
|
||
|
|
}
|