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main.go
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main.go
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// Copyright The OpenTelemetry 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"
"io"
"log"
"net/http"
"time"
"github.com/gorilla/mux"
)
func main() {
r := mux.NewRouter()
r.HandleFunc("/users/{user}", func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
user := vars["user"]
fmt.Fprintf(w, "Hello user %s\n", user)
})
go func() {
_ = http.ListenAndServe(":8080", r)
}()
// give time for auto-instrumentation to start up
time.Sleep(5 * time.Second)
resp, err := http.Get("http://localhost:8080/users/foo")
if err != nil {
log.Fatal(err)
}
body, err := io.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
log.Printf("Body: %s\n", string(body))
_ = resp.Body.Close()
// give time for auto-instrumentation to report signal
time.Sleep(5 * time.Second)
}