feat: implement skip path regexps feature in zap package (#72)

- Add a new import statement for `regexp` in `zap.go`
- Add a new field `SkipPathRegexps` to the `Config` struct in `zap.go`
- Add a new function `GinzapWithConfig` in `zap.go`
- Add a new test function `TestSkipPathRegexps` in `zap_test.go`

Signed-off-by: appleboy <appleboy.tw@gmail.com>

zap.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"net/http/httputil"
 	"os"
+	"regexp"
 	"runtime/debug"
 	"strings"
 	"time"
@@ -29,11 +30,12 @@ type ZapLogger interface {
 
 // Config is config setting for Ginzap
 type Config struct {
-	TimeFormat   string
-	UTC          bool
-	SkipPaths    []string
-	Context      Fn
-	DefaultLevel zapcore.Level
+	TimeFormat      string
+	UTC             bool
+	SkipPaths       []string
+	SkipPathRegexps []*regexp.Regexp
+	Context         Fn
+	DefaultLevel    zapcore.Level
 	// skip is a Skipper that indicates which logs should not be written.
 	// Optional.
 	Skipper Skipper
@@ -70,6 +72,17 @@ func GinzapWithConfig(logger ZapLogger, conf *Config) gin.HandlerFunc {
 			track = false
 		}
 
+		if track && len(conf.SkipPathRegexps) > 0 {
+			for _, reg := range conf.SkipPathRegexps {
+				if !reg.MatchString(path) {
+					continue
+				}
+
+				track = false
+				break
+			}
+		}
+
 		if track {
 			end := time.Now()
 			latency := end.Sub(start)

zap_test.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/http/httptest"
+	"regexp"
 	"testing"
 	"time"
 
@@ -178,3 +179,48 @@ func TestLoggerSkipper(t *testing.T) {
 		t.Fatalf("logged path should be /test but %s", pathStr)
 	}
 }
+
+func TestSkipPathRegexps(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	r := gin.New()
+
+	rxURL := regexp.MustCompile(`^/no_\s*`)
+
+	utcLogger, utcLoggerObserved := buildDummyLogger()
+	r.Use(GinzapWithConfig(utcLogger, &Config{
+		TimeFormat:      time.RFC3339,
+		UTC:             true,
+		SkipPathRegexps: []*regexp.Regexp{rxURL},
+	}))
+
+	r.GET(testPath, func(c *gin.Context) {
+		c.JSON(204, nil)
+	})
+
+	r.GET("/no_log", func(c *gin.Context) {
+		c.JSON(204, nil)
+	})
+
+	res1 := httptest.NewRecorder()
+	req1, _ := http.NewRequestWithContext(ctx, "GET", testPath, nil)
+	r.ServeHTTP(res1, req1)
+
+	res2 := httptest.NewRecorder()
+	req2, _ := http.NewRequestWithContext(ctx, "GET", "/no_log", nil)
+	r.ServeHTTP(res2, req2)
+
+	if res2.Code != 204 {
+		t.Fatalf("request /no_log is failed (%d)", res2.Code)
+	}
+
+	if len(utcLoggerObserved.All()) != 1 {
+		t.Fatalf("Log should be 1 line but there're %d", len(utcLoggerObserved.All()))
+	}
+
+	logLine := utcLoggerObserved.All()[0]
+	pathStr := logLine.Context[2].String
+	if pathStr != testPath {
+		t.Fatalf("logged path should be /test but %s", pathStr)
+	}
+}