better loggings for shortlinks

load_tests/api.py

@@ -71,3 +71,14 @@ class BackendApi():
         response = self.http.client.get("/health")
         if response.status_code != 200:
             raise AssertionError('something wrong')
+        
+    def shortlink_create(self, url: string) -> string:
+        response = self.http.client.post("/s/new?url=" + url)
+        if response.status_code != 200:
+            raise AssertionError('can not login user')
+        
+        link = response.json()['link']
+        if link == '':
+            raise AssertionError('empty user token')
+        
+        return link

load_tests/tests/shortlink.py

@@ -0,0 +1,13 @@
+from locust import FastHttpUser, task
+
+from api import BackendApi
+
+class ShortlinkCreate(FastHttpUser):
+    api: BackendApi
+
+    @task
+    def user_create_test(self):
+        self.api.shortlink_create("https://ya.ru")
+
+    def on_start(self):
+        self.api = BackendApi(self)

src/app.go

@@ -114,7 +114,7 @@ func (a *App) Run(p RunParams) {
 		}
 
 		tracerProvider := traceSdk.NewTracerProvider(
-			traceSdk.WithSampler(traceSdk.AlwaysSample()),
+			traceSdk.WithSampler(traceSdk.TraceIDRatioBased(0.1)),
 			traceSdk.WithBatcher(
 				tracerExporter,
 				traceSdk.WithMaxQueueSize(8192),

src/core/services/shortlink_service.go

@@ -10,6 +10,11 @@ import (
 	"time"
 )
 
+var (
+	ErrShortlinkNotexist = fmt.Errorf("shortlink does not exist or expired")
+	ErrShortlinkExpired  = fmt.Errorf("shortlink expired")
+)
+
 type ShortlinkService interface {
 	CreateShortlink(ctx context.Context, url string) (string, error)
 	GetShortlink(ctx context.Context, id string) (string, error)
@@ -66,7 +71,10 @@ func (s *shortlinkService) GetShortlink(ctx context.Context, id string) (string,
 		return "", err
 	}
 	if link == nil {
-		return "", fmt.Errorf("link does not exist or expired")
+		return "", ErrShortlinkNotexist
+	}
+	if time.Now().After(link.Expiration) {
+		return "", ErrShortlinkExpired
 	}
 
 	return link.Url, nil

src/server/handlers/shortlink_handlers.go

@@ -2,6 +2,7 @@ package handlers
 
 import (
 	"backend/src/core/services"
+	"backend/src/logger"
 	"encoding/json"
 	"fmt"
 	"net/url"
@@ -13,23 +14,28 @@ type shortlinkCreateOutput struct {
 	Link string `json:"link"`
 }
 
-func NewShortlinkCreateHandler(shortlinkService services.ShortlinkService) gin.HandlerFunc {
+func NewShortlinkCreateHandler(logger logger.Logger, shortlinkService services.ShortlinkService) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
+		ctxLogger := logger.WithContext(ctx)
+
 		rawUrl := ctx.Query("url")
 		if rawUrl == "" {
-			ctx.AbortWithError(400, fmt.Errorf("no url param"))
+			ctxLogger.Error().Msg("url query param missing")
+			ctx.AbortWithError(400, fmt.Errorf("url query param missing"))
 			return
 		}
 
 		u, err := url.Parse(rawUrl)
 		if err != nil {
-			ctx.Data(500, "plain/text", []byte(err.Error()))
+			ctxLogger.Error().Err(err).Msg("error parsing url param")
+			ctx.Data(400, "plain/text", []byte(err.Error()))
 			return
 		}
 		u.Scheme = "https"
 
 		linkId, err := shortlinkService.CreateShortlink(ctx, u.String())
 		if err != nil {
+			ctxLogger.Error().Err(err).Msg("err creating shortlink")
 			ctx.Data(500, "plain/text", []byte(err.Error()))
 			return
 		}
@@ -38,6 +44,7 @@ func NewShortlinkCreateHandler(shortlinkService services.ShortlinkService) gin.H
 			Link: "https://nucrea.ru/s/" + linkId,
 		})
 		if err != nil {
+			ctxLogger.Error().Err(err).Msg("err marshalling shortlink")
 			ctx.AbortWithError(500, err)
 			return
 		}
@@ -46,12 +53,25 @@ func NewShortlinkCreateHandler(shortlinkService services.ShortlinkService) gin.H
 	}
 }
 
-func NewShortlinkResolveHandler(shortlinkService services.ShortlinkService) gin.HandlerFunc {
+func NewShortlinkResolveHandler(logger logger.Logger, shortlinkService services.ShortlinkService) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
+		ctxLogger := logger.WithContext(ctx)
+
 		linkId := ctx.Param("linkId")
 
 		linkUrl, err := shortlinkService.GetShortlink(ctx, linkId)
+		if err == services.ErrShortlinkNotexist {
+			ctxLogger.Error().Err(err).Msg("err getting shortlink")
+			ctx.AbortWithError(404, err)
+			return
+		}
+		if err == services.ErrShortlinkExpired {
+			ctxLogger.Error().Err(err).Msg("err getting shortlink")
+			ctx.AbortWithError(404, err)
+			return
+		}
 		if err != nil {
+			ctxLogger.Error().Err(err).Msg("unexpected err getting shortlink")
 			ctx.AbortWithError(500, err)
 			return
 		}

src/server/handlers/user_create_handler.go

@@ -50,7 +50,7 @@ func NewUserCreateHandler(logger logger.Logger, userService services.UserService
 			return
 		}
 		if err != nil {
-			ctxLogger.Error().Err(err).Msg("create user error")
+			ctxLogger.Error().Err(err).Msg("unexpected create user error")
 			c.Data(500, "plain/text", []byte(err.Error()))
 			return
 		}

src/server/server.go

@@ -50,8 +50,8 @@ func New(opts NewServerOpts) *Server {
 	r.GET("/pooling", handlers.NewLongPoolingHandler(opts.Logger, opts.Notifier))
 
 	linkGroup := r.Group("/s")
-	linkGroup.POST("/new", handlers.NewShortlinkCreateHandler(opts.ShortlinkService))
-	linkGroup.GET("/:linkId", handlers.NewShortlinkResolveHandler(opts.ShortlinkService))
+	linkGroup.POST("/new", handlers.NewShortlinkCreateHandler(opts.Logger, opts.ShortlinkService))
+	linkGroup.GET("/:linkId", handlers.NewShortlinkResolveHandler(opts.Logger, opts.ShortlinkService))
 
 	userGroup := r.Group("/user")
 	userGroup.POST("/create", handlers.NewUserCreateHandler(opts.Logger, opts.UserService))