add gitea support

Author: pongsatt

gitea/gitea.go

@@ -0,0 +1,203 @@
+package gitea
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+
+	models "code.gitea.io/gitea/modules/structs"
+)
+
+// parse errors
+var (
+	ErrEventNotSpecifiedToParse    = errors.New("no Event specified to parse")
+	ErrInvalidHTTPMethod           = errors.New("invalid HTTP Method")
+	ErrMissingGiteaEventHeader     = errors.New("missing X-Gitea-Event Header")
+	ErrMissingGiteaSignatureHeader = errors.New("missing X-Gitea-Signature Header")
+	ErrEventNotFound               = errors.New("event not defined to be parsed")
+	ErrParsingPayload              = errors.New("error parsing payload")
+	ErrHMACVerificationFailed      = errors.New("HMAC verification failed")
+)
+
+// Option is a configuration option for the webhook
+type Option func(*Webhook) error
+
+// Options is a namespace var for configuration options
+var Options = WebhookOptions{}
+
+// WebhookOptions is a namespace for configuration option methods
+type WebhookOptions struct{}
+
+// Secret registers the GitLab secret
+func (WebhookOptions) Secret(secret string) Option {
+	return func(hook *Webhook) error {
+		hook.secret = secret
+		return nil
+	}
+}
+
+// Webhook instance contains all methods needed to process events
+type Webhook struct {
+	secret string
+}
+
+// Event defines a Gitea hook event type
+type Event string
+
+// Gitea hook types
+const (
+	CreateEvent       Event = "create"
+	DeleteEvent       Event = "delete"
+	ForkEvent         Event = "fork"
+	PushEvent         Event = "push"
+	IssuesEvent       Event = "issues"
+	IssueCommentEvent Event = "issue_comment"
+	PullRequestEvent  Event = "pull_request"
+	ReleaseEvent      Event = "release"
+)
+
+// New creates and returns a WebHook instance denoted by the Provider type
+func New(options ...Option) (*Webhook, error) {
+	hook := new(Webhook)
+	for _, opt := range options {
+		if err := opt(hook); err != nil {
+			return nil, errors.New("Error applying Option")
+		}
+	}
+	return hook, nil
+}
+
+func (hook Webhook) verifySecret(secret string) error {
+	if len(hook.secret) > 0 && hook.secret != secret {
+		return fmt.Errorf("secret %s not match", secret)
+	}
+
+	return nil
+}
+
+// Parse verifies and parses the events specified and returns the payload object or an error
+func (hook Webhook) Parse(r *http.Request, events ...Event) (interface{}, error) {
+	defer func() {
+		_, _ = io.Copy(ioutil.Discard, r.Body)
+		_ = r.Body.Close()
+	}()
+
+	if len(events) == 0 {
+		return nil, ErrEventNotSpecifiedToParse
+	}
+	if r.Method != http.MethodPost {
+		return nil, ErrInvalidHTTPMethod
+	}
+
+	event := r.Header.Get("X-Gitea-Event")
+	if len(event) == 0 {
+		return nil, ErrMissingGiteaEventHeader
+	}
+
+	giteaEvent := Event(event)
+
+	var found bool
+	for _, evt := range events {
+		if evt == giteaEvent {
+			found = true
+			break
+		}
+	}
+	// event not defined to be parsed
+	if !found {
+		return nil, ErrEventNotFound
+	}
+
+	payload, err := ioutil.ReadAll(r.Body)
+	if err != nil || len(payload) == 0 {
+		return nil, ErrParsingPayload
+	}
+
+	switch giteaEvent {
+	case CreateEvent:
+		var pl models.CreatePayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case ReleaseEvent:
+		var pl models.ReleasePayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case PushEvent:
+		var pl models.PushPayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case DeleteEvent:
+		var pl models.DeletePayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case ForkEvent:
+		var pl models.ForkPayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case IssuesEvent:
+		var pl models.IssuePayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case IssueCommentEvent:
+		var pl models.IssueCommentPayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	case PullRequestEvent:
+		var pl models.PullRequestPayload
+		err = json.Unmarshal([]byte(payload), &pl)
+
+		if err == nil {
+			err = hook.verifySecret(pl.Secret)
+		}
+
+		return pl, err
+
+	default:
+		return nil, fmt.Errorf("unknown event %s", giteaEvent)
+	}
+}

go.mod

@@ -0,0 +1,13 @@
+module gopkg.in/go-playground/webhooks.v5
+
+go 1.12
+
+require (
+	code.gitea.io/git v0.0.0-20190411170847-63b74d438b29 // indirect
+	code.gitea.io/gitea v1.9.0-dev.0.20190511102134-34eee25bd42d
+	code.gitea.io/sdk/gitea v0.0.0-20190602153954-7e711e06b588 // indirect
+	github.com/go-gitea/gitea v1.8.2
+	github.com/gogits/go-gogs-client v0.0.0-20181217004319-1cd0db3113de
+	github.com/mvdan/xurls v1.1.0 // indirect
+	github.com/stretchr/testify v1.3.0
+)