Add customizable Logger interface + info,error and debugs (#14)

* Add customizable Logger interface + info,error and debugs
* update travis.yml to atest golang versions

Author: Dean Karn

.travis.yml

@@ -1,7 +1,7 @@
 language: go
 go:
-    - 1.7.5
-    - 1.8.1
+    - 1.7.6
+    - 1.8.3
     - tip
 matrix:
   allow_failures:
@@ -34,6 +34,6 @@ script:
  - go test -race
 
 after_success: |
-  [ $TRAVIS_GO_VERSION = 1.8.1 ] &&
+  [ $TRAVIS_GO_VERSION = 1.8.3 ] &&
   overalls -project="github.com/go-playground/webhooks" -covermode=count -ignore=.git,examples -debug &&
   goveralls -coverprofile=overalls.coverprofile -service travis-ci -repotoken $COVERALLS_TOKEN

README.md

@@ -1,6 +1,6 @@
 Library webhooks
 ================
-<img align="right" src="https://raw.githubusercontent.com/go-playground/webhooks/v3/logo.png">![Project status](https://img.shields.io/badge/version-3.1.1-green.svg)
+<img align="right" src="https://raw.githubusercontent.com/go-playground/webhooks/v3/logo.png">![Project status](https://img.shields.io/badge/version-3.2.0-green.svg)
 [![Build Status](https://travis-ci.org/go-playground/webhooks.svg?branch=v3)](https://travis-ci.org/go-playground/webhooks)
 [![Coverage Status](https://coveralls.io/repos/go-playground/webhooks/badge.svg?branch=v3&service=github)](https://coveralls.io/github/go-playground/webhooks?branch=v3)
 [![Go Report Card](https://goreportcard.com/badge/go-playground/webhooks)](https://goreportcard.com/report/go-playground/webhooks)

bitbucket/bitbucket.go

@@ -2,6 +2,7 @@ package bitbucket
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 
@@ -69,38 +70,46 @@ func (hook Webhook) RegisterEvents(fn webhooks.ProcessPayloadFunc, events ...Eve
 
 // ParsePayload parses and verifies the payload and fires off the mapped function, if it exists.
 func (hook Webhook) ParsePayload(w http.ResponseWriter, r *http.Request) {
+	webhooks.DefaultLog.Info("Parsing Payload...")
 
 	uuid := r.Header.Get("X-Hook-UUID")
 	if uuid == "" {
+		webhooks.DefaultLog.Error("Missing X-Hook-UUID Header")
 		http.Error(w, "400 Bad Request - Missing X-Hook-UUID Header", http.StatusBadRequest)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("X-Hook-UUID:%s", uuid))
 
 	if uuid != hook.uuid {
-		http.Error(w, "403 Forbidden - Missing X-Hook-UUID does not match", http.StatusForbidden)
+		webhooks.DefaultLog.Error(fmt.Sprintf("X-Hook-UUID does not match configured uuid of %s", hook.uuid))
+		http.Error(w, "403 Forbidden - X-Hook-UUID does not match", http.StatusForbidden)
 		return
 	}
 
 	event := r.Header.Get("X-Event-Key")
 	if event == "" {
+		webhooks.DefaultLog.Error("Missing X-Event-Key Header")
 		http.Error(w, "400 Bad Request - Missing X-Event-Key Header", http.StatusBadRequest)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("X-Event-Key:%s", event))
 
 	bitbucketEvent := Event(event)
 
 	fn, ok := hook.eventFuncs[bitbucketEvent]
 	// if no event registered
 	if !ok {
+		webhooks.DefaultLog.Info(fmt.Sprintf("Webhook Event %s not registered, it is recommended to setup only events in bitbucket that will be registered in the webhook to avoid unnecessary traffic and reduce potential attack vectors.", event))
 		return
 	}
 
 	payload, err := ioutil.ReadAll(r.Body)
 	if err != nil || len(payload) == 0 {
-		http.Error(w, "Error reading Body", http.StatusInternalServerError)
+		webhooks.DefaultLog.Error("Issue reading Payload")
+		http.Error(w, "Issue reading Payload", http.StatusInternalServerError)
 		return
 	}
-
+	webhooks.DefaultLog.Debug(fmt.Sprintf("Payload:%s", string(payload)))
 	hd := webhooks.Header(r.Header)
 
 	switch bitbucketEvent {

examples/custom-logger/main.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"strconv"
+
+	"gopkg.in/go-playground/webhooks.v3"
+	"gopkg.in/go-playground/webhooks.v3/github"
+)
+
+const (
+	path = "/webhooks"
+	port = 3016
+)
+
+type myLogger struct {
+	PrintDebugs bool
+}
+
+func (l *myLogger) Info(msg string) {
+	log.Println(msg)
+}
+
+func (l *myLogger) Error(msg string) {
+	log.Println(msg)
+}
+
+func (l *myLogger) Debug(msg string) {
+	if !l.PrintDebugs {
+		return
+	}
+	log.Println(msg)
+}
+
+func main() {
+	// webhooks.DefaultLog=webhooks.NewLogger(true)
+	//
+	// or override with your own
+	webhooks.DefaultLog = &myLogger{PrintDebugs: true}
+
+	hook := github.New(&github.Config{Secret: "MyGitHubSuperSecretSecrect...?"})
+	hook.RegisterEvents(HandleMultiple, github.ReleaseEvent, github.PullRequestEvent) // Add as many as you want
+
+	err := webhooks.Run(hook, ":"+strconv.Itoa(port), path)
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+// HandleMultiple handles multiple GitHub events
+func HandleMultiple(payload interface{}, header webhooks.Header) {
+	fmt.Println("Handling Payload..")
+
+	switch payload.(type) {
+
+	case github.ReleasePayload:
+		release := payload.(github.ReleasePayload)
+		// Do whatever you want from here...
+		fmt.Printf("%+v", release)
+
+	case github.PullRequestPayload:
+		pullRequest := payload.(github.PullRequestPayload)
+		// Do whatever you want from here...
+		fmt.Printf("%+v", pullRequest)
+	}
+}

examples/multiple-handlers/main.go

@@ -14,7 +14,6 @@ const (
 )
 
 func main() {
-
 	hook := github.New(&github.Config{Secret: "MyGitHubSuperSecretSecrect...?"})
 	hook.RegisterEvents(HandleRelease, github.ReleaseEvent)
 	hook.RegisterEvents(HandlePullRequest, github.PullRequestEvent)
@@ -27,7 +26,6 @@ func main() {
 
 // HandleRelease handles GitHub release events
 func HandleRelease(payload interface{}, header webhooks.Header) {
-
 	fmt.Println("Handling Release")
 
 	pl := payload.(github.ReleasePayload)

examples/single-handler/main.go

@@ -14,7 +14,6 @@ const (
 )
 
 func main() {
-
 	hook := github.New(&github.Config{Secret: "MyGitHubSuperSecretSecrect...?"})
 	hook.RegisterEvents(HandleMultiple, github.ReleaseEvent, github.PullRequestEvent) // Add as many as you want
 
@@ -26,7 +25,6 @@ func main() {
 
 // HandleMultiple handles multiple GitHub events
 func HandleMultiple(payload interface{}, header webhooks.Header) {
-
 	fmt.Println("Handling Payload..")
 
 	switch payload.(type) {

github/github.go

@@ -5,6 +5,7 @@ import (
 	"crypto/sha1"
 	"encoding/hex"
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 
@@ -96,43 +97,51 @@ func (hook Webhook) RegisterEvents(fn webhooks.ProcessPayloadFunc, events ...Eve
 
 // ParsePayload parses and verifies the payload and fires off the mapped function, if it exists.
 func (hook Webhook) ParsePayload(w http.ResponseWriter, r *http.Request) {
+	webhooks.DefaultLog.Info("Parsing Payload...")
 
 	event := r.Header.Get("X-GitHub-Event")
 	if len(event) == 0 {
+		webhooks.DefaultLog.Error("Missing X-GitHub-Event Header")
 		http.Error(w, "400 Bad Request - Missing X-GitHub-Event Header", http.StatusBadRequest)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("X-GitHub-Event:%s", event))
 
 	gitHubEvent := Event(event)
 
 	fn, ok := hook.eventFuncs[gitHubEvent]
 	// if no event registered
 	if !ok {
+		webhooks.DefaultLog.Info(fmt.Sprintf("Webhook Event %s not registered, it is recommended to setup only events in github that will be registered in the webhook to avoid unnecessary traffic and reduce potential attack vectors.", event))
 		return
 	}
 
 	payload, err := ioutil.ReadAll(r.Body)
 	if err != nil || len(payload) == 0 {
-		http.Error(w, "Error reading Body", http.StatusInternalServerError)
+		webhooks.DefaultLog.Error("Issue reading Payload")
+		http.Error(w, "Issue reading Payload", http.StatusInternalServerError)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("Payload:%s", string(payload)))
 
 	// If we have a Secret set, we should check the MAC
 	if len(hook.secret) > 0 {
-
+		webhooks.DefaultLog.Info("Checking secret")
 		signature := r.Header.Get("X-Hub-Signature")
-
 		if len(signature) == 0 {
+			webhooks.DefaultLog.Error("Missing X-Hub-Signature required for HMAC verification")
 			http.Error(w, "403 Forbidden - Missing X-Hub-Signature required for HMAC verification", http.StatusForbidden)
 			return
 		}
+		webhooks.DefaultLog.Debug(fmt.Sprintf("X-Hub-Signature:%s", signature))
 
 		mac := hmac.New(sha1.New, []byte(hook.secret))
 		mac.Write(payload)
 
 		expectedMAC := hex.EncodeToString(mac.Sum(nil))
 
 		if !hmac.Equal([]byte(signature[5:]), []byte(expectedMAC)) {
+			webhooks.DefaultLog.Error("HMAC verification failed")
 			http.Error(w, "403 Forbidden - HMAC verification failed", http.StatusForbidden)
 			return
 		}

gitlab/gitlab.go

@@ -2,6 +2,7 @@ package gitlab
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"net/http"
 
@@ -59,33 +60,39 @@ func (hook Webhook) RegisterEvents(fn webhooks.ProcessPayloadFunc, events ...Eve
 
 // ParsePayload parses and verifies the payload and fires off the mapped function, if it exists.
 func (hook Webhook) ParsePayload(w http.ResponseWriter, r *http.Request) {
+	webhooks.DefaultLog.Info("Parsing Payload...")
 
 	event := r.Header.Get("X-Gitlab-Event")
 	if len(event) == 0 {
+		webhooks.DefaultLog.Error("Missing X-Gitlab-Event Header")
 		http.Error(w, "400 Bad Request - Missing X-Gitlab-Event Header", http.StatusBadRequest)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("X-Gitlab-Event:%s", event))
 
 	gitLabEvent := Event(event)
 
 	fn, ok := hook.eventFuncs[gitLabEvent]
 	// if no event registered
 	if !ok {
+		webhooks.DefaultLog.Info(fmt.Sprintf("Webhook Event %s not registered, it is recommended to setup only events in gitlab that will be registered in the webhook to avoid unnecessary traffic and reduce potential attack vectors.", event))
 		return
 	}
 
 	payload, err := ioutil.ReadAll(r.Body)
 	if err != nil || len(payload) == 0 {
-		http.Error(w, "Error reading Body", http.StatusInternalServerError)
+		webhooks.DefaultLog.Error("Issue reading Payload")
+		http.Error(w, "Error reading Payload", http.StatusInternalServerError)
 		return
 	}
+	webhooks.DefaultLog.Debug(fmt.Sprintf("Payload:%s", string(payload)))
 
 	// If we have a Secret set, we should check the MAC
 	if len(hook.secret) > 0 {
-
+		webhooks.DefaultLog.Info("Checking secret")
 		signature := r.Header.Get("X-Gitlab-Token")
-
 		if signature != hook.secret {
+			webhooks.DefaultLog.Error(fmt.Sprintf("Invalid X-Gitlab-Token of '%s'", signature))
 			http.Error(w, "403 Forbidden - Token missmatch", http.StatusForbidden)
 			return
 		}

logger.go

@@ -0,0 +1,44 @@
+package webhooks
+
+import "log"
+
+// DefaultLog contains the default logger for webhooks, and prints only info and error messages by default
+// for debugs override DefaultLog or see NewLogger for creating one without debugs.
+var DefaultLog Logger = new(logger)
+
+// Logger allows for customizable logging
+type Logger interface {
+	// Info prints basic information.
+	Info(string)
+	// Error prints error information.
+	Error(string)
+	// Debug prints information usefull for debugging.
+	Debug(string)
+}
+
+// NewLogger returns a new logger for use.
+func NewLogger(debug bool) Logger {
+	return &logger{PrintDebugs: debug}
+}
+
+type logger struct {
+	PrintDebugs bool
+}
+
+// Info prints basic information.
+func (l *logger) Info(msg string) {
+	log.Println("INFO:", msg)
+}
+
+// v prints error information.
+func (l *logger) Error(msg string) {
+	log.Println("ERROR:", msg)
+}
+
+// Debug prints information usefull for debugging.
+func (l *logger) Debug(msg string) {
+	if !l.PrintDebugs {
+		return
+	}
+	log.Println("DEBUG:", msg)
+}