Refactor error handling

Author: waseem-medhat

handler_notes.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"encoding/json"
-	"log"
 	"net/http"
 	"time"
 
@@ -13,14 +12,13 @@ import (
 func (cfg *apiConfig) handlerNotesGet(w http.ResponseWriter, r *http.Request, user database.User) {
 	posts, err := cfg.DB.GetNotesForUser(r.Context(), user.ID)
 	if err != nil {
-		respondWithError(w, http.StatusInternalServerError, "Couldn't get posts for user")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't get posts for user", err)
 		return
 	}
 
 	postsResp, err := databasePostsToPosts(posts)
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't convert posts")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't convert posts", err)
 		return
 	}
 
@@ -35,7 +33,7 @@ func (cfg *apiConfig) handlerNotesCreate(w http.ResponseWriter, r *http.Request,
 	params := parameters{}
 	err := decoder.Decode(&params)
 	if err != nil {
-		respondWithError(w, http.StatusInternalServerError, "Couldn't decode parameters")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't decode parameters", err)
 		return
 	}
 
@@ -48,20 +46,19 @@ func (cfg *apiConfig) handlerNotesCreate(w http.ResponseWriter, r *http.Request,
 		UserID:    user.ID,
 	})
 	if err != nil {
-		respondWithError(w, http.StatusInternalServerError, "Couldn't create note")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't create note", err)
 		return
 	}
 
 	note, err := cfg.DB.GetNote(r.Context(), id)
 	if err != nil {
-		respondWithError(w, http.StatusNotFound, "Couldn't get note")
+		respondWithError(w, http.StatusNotFound, "Couldn't get note", err)
 		return
 	}
 
 	noteResp, err := databaseNoteToNote(note)
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't convert note")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't convert note", err)
 		return
 	}
 

handler_user.go

@@ -5,7 +5,6 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"encoding/json"
-	"log"
 	"net/http"
 	"time"
 
@@ -21,13 +20,13 @@ func (cfg *apiConfig) handlerUsersCreate(w http.ResponseWriter, r *http.Request)
 	params := parameters{}
 	err := decoder.Decode(&params)
 	if err != nil {
-		respondWithError(w, http.StatusInternalServerError, "Couldn't decode parameters")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't decode parameters", err)
 		return
 	}
 
 	apiKey, err := generateRandomSHA256Hash()
 	if err != nil {
-		respondWithError(w, http.StatusInternalServerError, "Couldn't gen apikey")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't gen apikey", err)
 		return
 	}
 
@@ -39,22 +38,19 @@ func (cfg *apiConfig) handlerUsersCreate(w http.ResponseWriter, r *http.Request)
 		ApiKey:    apiKey,
 	})
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't create user")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't create user", err)
 		return
 	}
 
 	user, err := cfg.DB.GetUser(r.Context(), apiKey)
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't get user")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't get user", err)
 		return
 	}
 
 	userResp, err := databaseUserToUser(user)
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't convert user")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't convert user", err)
 		return
 	}
 	respondWithJSON(w, http.StatusCreated, userResp)
@@ -75,8 +71,7 @@ func (cfg *apiConfig) handlerUsersGet(w http.ResponseWriter, r *http.Request, us
 
 	userResp, err := databaseUserToUser(user)
 	if err != nil {
-		log.Println(err)
-		respondWithError(w, http.StatusInternalServerError, "Couldn't convert user")
+		respondWithError(w, http.StatusInternalServerError, "Couldn't convert user", err)
 		return
 	}
 

json.go

@@ -6,7 +6,10 @@ import (
 	"net/http"
 )
 
-func respondWithError(w http.ResponseWriter, code int, msg string) {
+func respondWithError(w http.ResponseWriter, code int, msg string, logErr error) {
+	if logErr != nil {
+		log.Println(logErr)
+	}
 	if code > 499 {
 		log.Printf("Responding with 5XX error: %s", msg)
 	}

middleware_auth.go

@@ -13,13 +13,13 @@ func (cfg *apiConfig) middlewareAuth(handler authedHandler) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		apiKey, err := auth.GetAPIKey(r.Header)
 		if err != nil {
-			respondWithError(w, http.StatusUnauthorized, "Couldn't find api key")
+			respondWithError(w, http.StatusUnauthorized, "Couldn't find api key", err)
 			return
 		}
 
 		user, err := cfg.DB.GetUser(r.Context(), apiKey)
 		if err != nil {
-			respondWithError(w, http.StatusNotFound, "Couldn't get user")
+			respondWithError(w, http.StatusNotFound, "Couldn't get user", err)
 			return
 		}