Fixing errors from errcheck

handlers.go

@@ -9,7 +9,10 @@ import (
 )
 
 func healthcheck(w http.ResponseWriter, r *http.Request) {
-	w.Write([]byte("ok"))
+	_, err := w.Write([]byte("ok"))
+	if err != nil {
+		fmt.Printf("Error writing ok: %+v", err)
+	}
 }
 
 func reloadRules(c *Config) http.HandlerFunc {
@@ -20,7 +23,12 @@ func reloadRules(c *Config) http.HandlerFunc {
 			http.Error(w, e.Error(), http.StatusInternalServerError)
 			return
 		}
-		w.Write([]byte("ok"))
+		_, err = w.Write([]byte("ok"))
+		if err != nil {
+			e := fmt.Errorf("cannot reload rules: %+v", err)
+			http.Error(w, e.Error(), http.StatusInternalServerError)
+			return
+		}
 	}
 }
 
@@ -39,7 +47,11 @@ func serveRules(c *Config) http.HandlerFunc {
 				http.Error(w, err.Error(), http.StatusInternalServerError)
 				return
 			}
-			w.Write(data)
+			_, err = w.Write(data)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 			return
 		}
 
@@ -71,7 +83,11 @@ func serveRules(c *Config) http.HandlerFunc {
 				http.Error(w, err.Error(), http.StatusInternalServerError)
 				return
 			}
-			w.Write(data)
+			_, err = w.Write(data)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 			return
 		}
 
@@ -94,6 +110,10 @@ func serveRules(c *Config) http.HandlerFunc {
 		}
 
 		w.Header().Set("Cache-Control", "public, max-age=500")
-		w.Write(buf.Bytes())
+		_, err = w.Write(buf.Bytes())
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
 	}
 }

main.go

@@ -52,7 +52,12 @@ func main() {
 
 	confFlag := flags.String("conf", "", "Required. Contains all the configurations options")
 
-	flags.Parse(os.Args[1:])
+	err := flags.Parse(os.Args[1:])
+	if err != nil {
+		errorLog.Println("Error: cannot parse command-line arguments")
+		flags.Usage()
+		os.Exit(1)
+	}
 
 	if len(flags.Args()) > 1 {
 		errorLog.Println("Error: too many command-line arguments")

middleware.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 )
 
@@ -9,7 +10,10 @@ import (
 func serveLogger(l *LogFile) func(http.HandlerFunc) http.HandlerFunc {
 	return func(next http.HandlerFunc) http.HandlerFunc {
 		return func(w http.ResponseWriter, r *http.Request) {
-			l.WriteLog(r)
+			err := l.WriteLog(r)
+			if err != nil {
+				fmt.Printf("Error writing log : %+v", err)
+			}
 			next(w, r)
 		}
 	}

testUtils_test.go

@@ -113,12 +113,12 @@ func walkMatch(t *testing.T, root, pattern string) []string {
 // 	return !errors.Is(err, fs.ErrNotExist)
 // }
 
-func removeFileForTest(t *testing.T, name string) {
+// func removeFileForTest(t *testing.T, name string) {
-	err := os.Remove(name)
+// 	err := os.Remove(name)
-	if err != nil {
+// 	if err != nil {
-		t.Fatal(err)
+// 		t.Fatal(err)
-	}
+// 	}
-}
+// }
 
 func writeJsonForTest(t *testing.T, data map[string]any, fp string) {
 	jsonString, _ := json.Marshal(data)