Golang Context.Next方法代碼示例

func (r recovery) Serve(ctx *iris.Context) {
	defer func() {
		if err := recover(); err != nil {
			r.out.Write([]byte("[" + time.Now().String() + "]Recovery from panic \n"))
			//ctx.Panic just sends  http status 500 by default, but you can change it by: iris.OnPanic(func( c *iris.Context){})
			ctx.Panic()
		}
	}()
	ctx.Next()
}

// Serve the actual middleware
func (b *basicAuthMiddleware) Serve(ctx *iris.Context) {

	if auth, found := b.findAuth(ctx.RequestHeader("Authorization")); !found {
		/* I spent time for nothing
		if b.banEnabled && auth != nil { // this propably never work

			if auth.tries == b.config.MaxTries {
				auth.bannedTime = time.Now()
				auth.unbanTime = time.Now().Add(b.config.BanDuration) // set the unban time
				auth.tries++                                          // we plus them in order to check if already banned later
				// client is banned send a forbidden status and don't continue
				ctx.SetStatusCode(iris.StatusForbidden)
				return
			} else if auth.tries > b.config.MaxTries { // it's already banned, so check the ban duration with the bannedTime
				if time.Now().After(auth.unbanTime) { // here we unban the client
					auth.tries = 0
					auth.bannedTime = config.CookieExpireNever
					auth.unbanTime = config.CookieExpireNever
					// continue and askCredentials as normal
				} else {
					// client is banned send a forbidden status and don't continue
					ctx.SetStatusCode(iris.StatusForbidden)
					return
				}

			}
		}
		if auth != nil {
			auth.tries++
		}*/

		b.askForCredentials(ctx)
		// don't continue to the next handler
	} else {
		// all ok set the context's value in order to be getable from the next handler
		ctx.Set(b.config.ContextKey, auth.Username)
		if b.expireEnabled {

			if auth.logged == false {
				auth.expires = time.Now().Add(b.config.Expires)
				auth.logged = true
			}

			if time.Now().After(auth.expires) {
				b.askForCredentials(ctx) // ask for authentication again
				return
			}

		}

		//auth.tries = 0
		ctx.Next() // continue
	}

}

// White-box testing *
func TestContextDoNextStop(t *testing.T) {
	var context iris.Context
	ok := false
	afterStop := false
	context.Middleware = iris.Middleware{iris.HandlerFunc(func(*iris.Context) {
		ok = true
	}), iris.HandlerFunc(func(*iris.Context) {
		ok = true
	}), iris.HandlerFunc(func(*iris.Context) {
		// this will never execute
		afterStop = true
	})}
	context.Do()
	if context.Pos != 0 {
		t.Fatalf("Expecting position 0 for context's middleware but we got: %d", context.Pos)
	}
	if !ok {
		t.Fatalf("Unexpected behavior, first context's middleware didn't executed")
	}
	ok = false

	context.Next()

	if int(context.Pos) != 1 {
		t.Fatalf("Expecting to have position %d but we got: %d", 1, context.Pos)
	}
	if !ok {
		t.Fatalf("Next context's middleware didn't executed")
	}

	context.StopExecution()
	if context.Pos != 255 {
		t.Fatalf("Context's StopExecution didn't worked, we expected to have position %d but we got %d", 255, context.Pos)
	}

	if !context.IsStopped() {
		t.Fatalf("Should be stopped")
	}

	context.Next()

	if afterStop {
		t.Fatalf("We stopped the execution but the next handler was executed")
	}
}

// Serve serves the middleware
func (l *LoggerMiddleware) Serve(ctx *iris.Context) {
	//all except latency to string
	var date, status, ip, method, path string
	var latency time.Duration
	var startTime, endTime time.Time

	status = strconv.Itoa(ctx.Response.StatusCode())
	ip = ctx.RemoteAddr()
	path = ctx.PathString()
	method = ctx.MethodString()

	startTime = time.Now()
	ctx.Next()
	//no time.Since in order to format it well after
	endTime = time.Now()
	date = endTime.Format("01/02 - 15:04:05")
	latency = endTime.Sub(startTime)

	//finally print the logs
	l.printf("%s %v %4v %s %s %s", date, status, latency, ip, method, path)
}

//Important staff, iris middleware must implement the iris.Handler interface which is:
func (m MyGlobalMiddlewareStructed) Serve(c *iris.Context) {
	fmt.Println("Hello from logger with id: ", m.loggerId)
	c.Next()
}