Fixing errors from errcheck

.github/workflows/lint_and_test.yml

@@ -0,0 +1,42 @@
+name: Lint and test yml
+
+on: [push]
+
+permissions:
+  contents: read
+
+jobs:
+  lint_and_test:
+    # if: ${{ !github.event.act }} # Skip during local actions testing
+    if: github.repository == 'garrancode/gocustomurls'
+    # runs-on: [ubuntu-latest, self-hosted]
+    runs-on: [ubuntu-latest]
+
+    strategy:
+      matrix:
+        # Uses some of the solutions found here (https://github.com/actions/setup-go/issues/450)
+        go-version: ['', 'oldstable', 'stable']
+
+    steps:
+        # git show-ref v4.2.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # git show-ref v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Go version ${{ matrix.go-version }}
+        # git show-ref v5.4.0
+        uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # git show-ref v5.4.0
+        with:
+          # Uses the condition found in here (https://github.com/actions/setup-go?tab=readme-ov-file#getting-go-version-from-the-gomod-file)
+          go-version: ${{ matrix.go-version }}
+          go-version-file: 'go.mod'
+
+      - name: Lint with ${{ matrix.go-version }}
+        # git show-ref v6.5.2
+        uses: golangci/golangci-lint-action@8564da7cb3c6866ed1da648ca8f00a258ef0c802 # git show-ref v6.5.2
+        with:
+          args: --timeout=3m --verbose
+
+      - name: Test with ${{ matrix.go-version }}
+        run: |
+          make coverage-full

.github/workflows/local.yml

@@ -0,0 +1,43 @@
+name: Local workflow for act
+
+on: [workflow_dispatch]
+
+permissions:
+  contents: read
+
+jobs:
+  local:
+    runs-on: ubuntu-latest
+    # image to run with act
+    container:
+      # image url (https://github.com/catthehacker/docker_images/pkgs/container/ubuntu/405021598?tag=act-latest)
+      image: ghcr.io/catthehacker/ubuntu:act-latest-20250429@sha256:ed7b477aa8ba68efd4ebdd6c2cc00728cfecf9780babb04383f481201641e793
+
+    strategy:
+      matrix:
+        # Uses some of the solutions found here (https://github.com/actions/setup-go/issues/450)
+        go-version: ['', 'oldstable', 'stable']
+
+    steps:
+        # git show-ref v4.2.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # git show-ref v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Go version ${{ matrix.go-version }}
+        # git show-ref v5.4.0
+        uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # git show-ref v5.4.0
+        with:
+          # Uses the condition found in here (https://github.com/actions/setup-go?tab=readme-ov-file#getting-go-version-from-the-gomod-file)
+          go-version: ${{ matrix.go-version }}
+          go-version-file: 'go.mod'
+
+      - name: Lint with ${{ matrix.go-version }}
+        # git show-ref v6.5.2
+        uses: golangci/golangci-lint-action@8564da7cb3c6866ed1da648ca8f00a258ef0c802 # git show-ref v6.5.2
+        with:
+          args: --timeout=3m --verbose
+
+      - name: Test with ${{ matrix.go-version }}
+        run: |
+          make coverage-full

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)