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app.go
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app.go
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package app
import (
"net/http"
"time"
ginzap "github.com/gin-contrib/zap"
"github.com/gin-gonic/gin"
"github.com/go-logr/zapr"
"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
func Router(logger *zap.Logger, timewaster TimeWaster, memoryTest MemoryGobbler, cpuTest CPUWaster, diskOccupier DiskOccupier, customMetricTest CustomMetricClient) *gin.Engine {
r := gin.New()
otel.SetTracerProvider(sdktrace.NewTracerProvider())
otel.SetTextMapPropagator(propagation.TraceContext{})
r.Use(otelgin.Middleware("acceptance-tests-go-app"))
r.Use(ginzap.GinzapWithConfig(logger, &ginzap.Config{
TimeFormat: time.RFC3339,
UTC: true,
Context: ginzap.Fn(func(c *gin.Context) []zapcore.Field {
fields := []zapcore.Field{}
// log CF ID
if requestID := c.Request.Header.Get("X-Vcap-Request-Id"); requestID != "" {
fields = append(fields, zap.String("vcap_request_id", requestID))
}
if passport := c.Request.Header.Get("SAP-PASSPORT"); passport != "" {
fields = append(fields, zap.String("sap_passport", passport))
}
// support opentelemetry trace ID
fields = append(fields, zap.String("w3c_trace-id", trace.SpanFromContext(c.Request.Context()).SpanContext().TraceID().String()))
return fields
}),
}))
r.Use(ginzap.RecoveryWithZap(logger, true))
logr := zapr.NewLogger(logger)
r.GET("/", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"name": "test-app"}) })
r.GET("/health", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"status": "ok"}) })
MemoryTests(logr, r.Group("/memory"), memoryTest)
ResponseTimeTests(logr, r.Group("/responsetime"), timewaster)
CPUTests(logr, r.Group("/cpu"), cpuTest)
DiskTest(r.Group("/disk"), diskOccupier)
CustomMetricsTests(logr, r.Group("/custom-metrics"), customMetricTest)
return r
}
func New(logger *zap.Logger, address string) *http.Server {
errorLog, _ := zap.NewStdLogAt(logger, zapcore.ErrorLevel)
return &http.Server{
Addr: address,
Handler: Router(
logger,
&Sleeper{},
&ListBasedMemoryGobbler{},
&ConcurrentBusyLoopCPUWaster{},
NewDefaultDiskOccupier("this-file-is-being-used-during-disk-occupation"),
&CustomMetricAPIClient{},
),
ReadTimeout: 5 * time.Second,
IdleTimeout: 2 * time.Second,
WriteTimeout: 30 * time.Second,
ErrorLog: errorLog,
}
}