init

.vscode/settings.json

+{
+    "go.inferGopath": false
+}
\ No newline at end of file

go.mod

+module goodrain.com/api-load
+
+go 1.15
+
+require github.com/sirupsen/logrus v1.7.0 // indirect

go.sum

+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
+github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

main.go

+package main
+
+import (
+	"net/http"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+	var sleep = os.Getenv("SLEEP")
+	sleepInt, _ := strconv.Atoi(sleep)
+	if sleepInt == 0 {
+		sleepInt = 3
+	}
+	var i = 0
+	http.HandleFunc("/api", func(rw http.ResponseWriter, r *http.Request) {
+		time.Sleep(time.Millisecond * time.Duration(sleepInt))
+		logrus.Infof("receive request %d", i)
+		rw.Write([]byte("Hello word"))
+		i++
+	})
+	logrus.Info("server listen")
+	http.ListenAndServe(":9000", nil)
+}