wip

mangezmieux-backend/internal/ginserver/headers.go

@@ -0,0 +1,8 @@
+package ginserver
+
+const (
+	HeaderNameContentType   = "content-type"
+	HeaderNameCorrelationID = "correlationID"
+
+	HeaderValueApplicationJSONUTF8 = "application/json; charset=UTF-8"
+)

mangezmieux-backend/internal/ginserver/logger.go

@@ -0,0 +1,70 @@
+package ginserver
+
+import (
+	"mangezmieux-backend/internal/logger"
+	"math/rand"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+const (
+	letterBytes   = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	letterIdxBits = 6                    // 6 bits to represent a letter index
+	letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
+	letterIdxMax  = 63 / letterIdxBits   // # of letter indices fitting in 63 bits
+)
+
+var src = rand.NewSource(time.Now().UnixNano())
+
+func randStringBytesMaskImprSrc(n int) string {
+	b := make([]byte, n)
+	// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
+	for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
+		if remain == 0 {
+			cache, remain = src.Int63(), letterIdxMax
+		}
+		if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
+			b[i] = letterBytes[idx]
+			i--
+		}
+		cache >>= letterIdxBits
+		remain--
+	}
+
+	return string(b)
+}
+
+func GetLoggerMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		correlationID := c.Request.Header.Get(HeaderNameCorrelationID)
+		if correlationID == "" {
+			correlationID = randStringBytesMaskImprSrc(30)
+			c.Writer.Header().Set(HeaderNameCorrelationID, correlationID)
+		}
+
+		logEntry := logger.GetLogger().WithField(HeaderNameCorrelationID, correlationID)
+
+		c.Set(logger.ContextKeyLogger, logEntry)
+	}
+}
+
+func GetHTTPLoggerMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		start := time.Now()
+
+		logger.GetLoggerFromCtx(c).
+			WithField("method", c.Request.Method).
+			WithField("url", c.Request.RequestURI).
+			WithField("from", c.ClientIP()).
+			Info("start handling HTTP request")
+
+		c.Next()
+		d := time.Since(start)
+
+		logger.GetLoggerFromCtx(c).
+			WithField("status", c.Writer.Status()).
+			WithField("duration", d.String()).
+			Info("end handling HTTP request")
+	}
+}

mangezmieux-backend/internal/ginserver/setup.go

@@ -0,0 +1,45 @@
+package ginserver
+
+import (
+	"mangezmieux-backend/internal/injector"
+	"time"
+
+	"github.com/gin-contrib/cors"
+	"github.com/gin-gonic/gin"
+)
+
+var (
+	routerInjectorKey = "ROUTER"
+
+	SecuredRouterInjectorKey   = "SECURED_ROUTER"
+	UnsecuredRouterInjectorKey = "UNSECURED_ROUTER"
+)
+
+func Setup(inj *injector.Injector) {
+	gin.SetMode(gin.ReleaseMode)
+
+	router := gin.New()
+	router.HandleMethodNotAllowed = true
+
+	router.Use(cors.New(cors.Config{
+		AllowOrigins:     []string{"http://localhost:3000/", "http://localhost:3000"},
+		AllowMethods:     []string{"*"},
+		AllowHeaders:     []string{"*"},
+		ExposeHeaders:    []string{"*"},
+		AllowCredentials: true,
+		MaxAge:           12 * time.Hour,
+	}))
+	router.Use(gin.Recovery())
+	router.Use(GetLoggerMiddleware())
+	router.Use(GetHTTPLoggerMiddleware())
+	public := router.Group("")
+	inj.Set(UnsecuredRouterInjectorKey, public)
+
+	authMiddleware := injector.Get[gin.HandlerFunc](inj, "AuthenticationMiddleware")
+
+	securedUserRoute := public.Group("/api/v1")
+	securedUserRoute.Use(authMiddleware)
+
+	inj.Set(SecuredRouterInjectorKey, securedUserRoute)
+	inj.Set(routerInjectorKey, router)
+}

mangezmieux-backend/internal/ginserver/start.go

@@ -0,0 +1,41 @@
+package ginserver
+
+import (
+	"errors"
+	"log"
+	"mangezmieux-backend/internal/injector"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Start(inj *injector.Injector, port string) {
+	router := injector.Get[*gin.Engine](inj, routerInjectorKey)
+
+	srv := &http.Server{
+		Addr:              ":" + port,
+		Handler:           router,
+		ReadHeaderTimeout: 4 * time.Second,
+	}
+
+	go func() {
+		// service connections
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("listen: %s\n", err)
+		}
+	}()
+
+	// Wait for interrupt signal to gracefully shutdown the server with
+	// a timeout of 5 seconds.
+	quit := make(chan os.Signal, 1)
+	// kill (no param) default send syscanll.SIGTERM
+	// kill -2 is syscall.SIGINT
+	// kill -9 is syscall. SIGKILL but can"t be catch, so don't need add it
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	log.Println("Shutdown Server ...")
+}