/
main.go
53 lines (45 loc) · 1.22 KB
/
main.go
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package main
import (
"context"
"log"
"net/http"
"net/http/httptrace"
"go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"github.com/oinume/opencensus-client-trace-sample/opentelemetry"
)
func main() {
tracerProvider, err := opentelemetry.NewTracerProvider("otelhttp_client_trace")
if err != nil {
log.Fatal(err)
}
defer func() {
if err := tracerProvider.Shutdown(context.Background()); err != nil {
log.Fatal(err)
}
}()
otel.SetTracerProvider(tracerProvider)
ctx := context.Background()
ctx, span := tracerProvider.Tracer("main").Start(ctx, "main")
defer span.End()
if err := httpGet(ctx, "https://journal.lampetty.net/"); err != nil {
log.Fatal(err)
}
}
func httpGet(ctx context.Context, url string) error {
ctx, span := otel.Tracer("main").Start(ctx, "httpGet")
defer span.End()
span.SetAttributes(attribute.Key("url").String(url))
clientTrace := otelhttptrace.NewClientTrace(ctx)
ctx = httptrace.WithClientTrace(ctx, clientTrace)
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
return err
}
_, err = http.DefaultClient.Do(req)
if err != nil {
return err
}
return nil
}