Add a Skipper middleware

Since the forked repo appeared to be unmaintained,
we are pulling this open PR in:
brpaz#4

Signed-off-by: Valério Valério <vdv100@gmail.com>

Author: VDVsx

Makefile

@@ -9,7 +9,7 @@ export GO111MODULE=on
 dev-deps: ## Install Development dependencies
 	npm i -g conventional-changelog-cli commitizen
 
-dev: ## Setup the Development envrionment
+dev: ## Setup the Development environment
 	pre-commit install
 
 fmt: ## Formats the go code using gofmt

logger.go

@@ -9,10 +9,46 @@ import (
 	"go.uber.org/zap/zapcore"
 )
 
+type (
+	Skipper func(c echo.Context) bool
+
+	// ZapLoggerConfig defines the config for ZapLogger middleware
+	ZapLoggerConfig struct {
+		// Skipper defines a function to skip middleware
+		Skipper Skipper
+	}
+)
+
+var (
+	// DefaultZapLoggerConfig is the default ZapLogger middleware config.
+	DefaultZapLoggerConfig = ZapLoggerConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// DefaultSkipper returns false which processes the middleware
+func DefaultSkipper(echo.Context) bool {
+	return false
+}
+
 // ZapLogger is a middleware and zap to provide an "access log" like logging for each request.
 func ZapLogger(log *zap.Logger) echo.MiddlewareFunc {
+	return ZapLoggerWithConfig(log, DefaultZapLoggerConfig)
+}
+
+// ZapLoggerWithConfig is a middleware (with configuration) and zap to provide an "access log" like logging for each request.
+func ZapLoggerWithConfig(log *zap.Logger, config ZapLoggerConfig) echo.MiddlewareFunc {
 	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		// Defaults
+		if config.Skipper == nil {
+			config.Skipper = DefaultZapLoggerConfig.Skipper
+		}
+
 		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
 			start := time.Now()
 
 			err := next(c)

logger_test.go

@@ -3,6 +3,7 @@ package echozap
 import (
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 
 	"github.com/labstack/echo/v4"
@@ -38,3 +39,28 @@ func TestZapLogger(t *testing.T) {
 	assert.NotNil(t, logFields["host"])
 	assert.NotNil(t, logFields["size"])
 }
+
+func TestZapLoggerWithConfig(t *testing.T) {
+	e := echo.New()
+	req := httptest.NewRequest(http.MethodGet, "/something", nil)
+	rec := httptest.NewRecorder()
+	c := e.NewContext(req, rec)
+
+	h := func(c echo.Context) error {
+		return c.String(http.StatusOK, "")
+	}
+
+	obs, logs := observer.New(zap.DebugLevel)
+
+	logger := zap.New(obs)
+
+	err := ZapLoggerWithConfig(logger, ZapLoggerConfig{
+		Skipper: func(ctx echo.Context) bool {
+			return strings.Contains(ctx.Request().URL.Path, "/something")
+		},
+	})(h)(c)
+
+	assert.Nil(t, err)
+
+	assert.Equal(t, 0, logs.Len())
+}