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webhook.go
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webhook.go
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// Copyright 2017 Drone.IO Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package stash
import (
"encoding/json"
"errors"
"io"
"io/ioutil"
"net/http"
"time"
"github.com/jenkins-x/go-scm/pkg/hmac"
"github.com/jenkins-x/go-scm/scm"
)
// TODO(bradrydzewski) push hook does not include commit message
// TODO(bradrydzewski) push hook does not include commit link
// TODO(bradrydzewski) push hook does not include repository git+http link
// TODO(bradrydzewski) push hook does not include repository git+ssh link
// TODO(bradrydzewski) push hook does not include repository html link
// TODO(bradrydzewski) missing pull request synchrnoized webhook. See https://jira.atlassian.com/browse/BSERV-10279
// TODO(bradrydzewski) pr hook does not include repository git+http link
// TODO(bradrydzewski) pr hook does not include repository git+ssh link
// TODO(bradrydzewski) pr hook does not include repository html link
type webhookService struct {
client *wrapper
}
// Parse for the bitbucket server webhook payloads see: https://confluence.atlassian.com/bitbucketserver/event-payload-938025882.html
func (s *webhookService) Parse(req *http.Request, fn scm.SecretFunc) (scm.Webhook, error) {
data, err := ioutil.ReadAll(
io.LimitReader(req.Body, 10000000),
)
if err != nil {
return nil, err
}
var hook scm.Webhook
event := req.Header.Get("X-Event-Key")
switch event {
case "repo:refs_changed":
hook, err = s.parsePushHook(data)
case "pr:opened", "pr:declined", "pr:merged", "pr:from_ref_updated", "pr:modified":
hook, err = s.parsePullRequest(data)
case "pr:comment:added", "pr:comment:edited":
hook, err = s.parsePullRequestComment(data)
case "pr:reviewer:approved", "pr:reviewer:unapproved", "pr:reviewer:needs_work":
hook, err = s.parsePullRequestApproval(data)
default:
return nil, scm.UnknownWebhook{Event: event}
}
if err != nil {
return nil, err
}
if hook == nil {
return nil, nil
}
// get the gogs signature key to verify the payload
// signature. If no key is provided, no validation
// is performed.
key, err := fn(hook)
if err != nil {
return hook, err
} else if key == "" {
return hook, nil
}
sig := req.Header.Get("X-Hub-Signature")
if !hmac.ValidatePrefix(data, []byte(key), sig) {
return hook, scm.ErrSignatureInvalid
}
return hook, nil
}
func (s *webhookService) parsePushHook(data []byte) (scm.Webhook, error) {
dst := new(pushHook)
err := json.Unmarshal(data, dst)
if err != nil {
return nil, err
}
if len(dst.Changes) == 0 {
return nil, errors.New("Push hook has empty changeset")
}
change := dst.Changes[0]
switch {
case change.Ref.Type == "BRANCH" && change.Type != "UPDATE":
return convertBranchHook(dst), nil
case change.Ref.Type == "TAG":
return convertTagHook(dst), nil
default:
return convertPushHook(dst), err
}
}
func (s *webhookService) parsePullRequest(data []byte) (scm.Webhook, error) {
src := new(pullRequestHook)
err := json.Unmarshal(data, src)
if err != nil {
return nil, err
}
dst := convertPullRequestHook(src)
switch src.EventKey {
case "pr:opened":
dst.Action = scm.ActionOpen
case "pr:declined":
dst.Action = scm.ActionClose
case "pr:merged":
dst.Action = scm.ActionMerge
case "pr:from_ref_updated":
dst.Action = scm.ActionSync
case "pr:modified":
dst.Action = scm.ActionUpdate
default:
return nil, nil
}
return dst, nil
}
func (s *webhookService) parsePullRequestComment(data []byte) (scm.Webhook, error) {
src := new(pullRequestCommentHook)
err := json.Unmarshal(data, src)
if err != nil {
return nil, err
}
dst := convertPullRequestCommentHook(src)
return dst, nil
}
func (s *webhookService) parsePullRequestApproval(data []byte) (scm.Webhook, error) {
src := new(pullRequestApprovalHook)
err := json.Unmarshal(data, src)
if err != nil {
return nil, err
}
dst := convertPullRequestApprovalHook(src)
switch src.EventKey {
case "pr:reviewer:approved":
dst.Action = scm.ActionSubmitted
case "pr:reviewer:unapproved":
dst.Action = scm.ActionDismissed
case "pr:reviewer:needs_work":
dst.Action = scm.ActionEdited
default:
return nil, nil
}
return dst, nil
}
//
// native data structures
//
type pushHook struct {
EventKey string `json:"eventKey"`
Date string `json:"date"`
Actor *user `json:"actor"`
Repository *repository `json:"repository"`
Changes []*change `json:"changes"`
}
type pullRequestHook struct {
EventKey string `json:"eventKey"`
Date string `json:"date"`
Actor *user `json:"actor"`
PullRequest *pullRequest `json:"pullRequest"`
PreviousFromHash string `json:"previousFromHash"`
PreviousTitle string `json:"previousTitle"`
PreviousDescription string `json:"previousDescription"`
PreviousTarget interface{} `json:"previousTarget"`
}
type pullRequestCommentHook struct {
EventKey string `json:"eventKey"`
Date string `json:"date"`
Author *user `json:"author"`
PullRequest *pullRequest `json:"pullRequest"`
Comment *prComment `json:"comment"`
}
type prComment struct {
ID int `json:"id"`
Version int `json:"version"`
Text string `json:"text"`
Author *user `json:"author"`
CreatedAt int64 `json:"createdDate"`
UpdatedAt int64 `json:"updatedDate"`
}
type change struct {
Ref struct {
ID string `json:"id"`
DisplayID string `json:"displayId"`
Type string `json:"type"`
} `json:"ref"`
RefID string `json:"refId"`
FromHash string `json:"fromHash"`
ToHash string `json:"toHash"`
Type string `json:"type"`
}
type pullRequestApprovalHook struct {
EventKey string `json:"eventKey"`
Date string `json:"date"`
Actor *user `json:"actor"`
PullRequest *pullRequest `json:"pullRequest"`
Participant *prUser `json:"participant"`
PreviousStatus string `json:"previousParticipant"`
}
//
// push hooks
//
func convertPushHook(src *pushHook) *scm.PushHook {
change := src.Changes[0]
repo := convertRepository(src.Repository)
sender := convertUser(src.Actor)
signer := convertSignature(src.Actor)
signer.Date, _ = time.Parse("2006-01-02T15:04:05+0000", src.Date)
return &scm.PushHook{
Ref: change.RefID,
Commit: scm.Commit{
Sha: change.ToHash,
Message: "",
Link: "",
Author: signer,
Committer: signer,
},
Repo: *repo,
Sender: *sender,
}
}
func convertTagHook(src *pushHook) *scm.TagHook {
change := src.Changes[0]
sender := convertUser(src.Actor)
repo := convertRepository(src.Repository)
dst := &scm.TagHook{
Ref: scm.Reference{
Name: change.Ref.DisplayID,
Sha: change.ToHash,
},
Action: scm.ActionCreate,
Repo: *repo,
Sender: *sender,
}
if change.Type == "DELETE" {
dst.Action = scm.ActionDelete
dst.Ref.Sha = change.FromHash
}
return dst
}
func convertBranchHook(src *pushHook) *scm.BranchHook {
change := src.Changes[0]
sender := convertUser(src.Actor)
repo := convertRepository(src.Repository)
dst := &scm.BranchHook{
Ref: scm.Reference{
Name: change.Ref.DisplayID,
Sha: change.ToHash,
},
Action: scm.ActionCreate,
Repo: *repo,
Sender: *sender,
}
if change.Type == "DELETE" {
dst.Action = scm.ActionDelete
dst.Ref.Sha = change.FromHash
}
return dst
}
func convertSignature(actor *user) scm.Signature {
return scm.Signature{
Name: actor.DisplayName,
Email: actor.EmailAddress,
Login: actor.Slug,
Avatar: avatarLink(actor.EmailAddress),
}
}
func convertPullRequestHook(src *pullRequestHook) *scm.PullRequestHook {
toRepo := convertRepository(&src.PullRequest.ToRef.Repository)
fromRepo := convertRepository(&src.PullRequest.FromRef.Repository)
pr := convertPullRequest(src.PullRequest)
sender := convertUser(src.Actor)
pr.Base.Repo = *toRepo
pr.Head.Repo = *fromRepo
if pr.Base.Ref == "" {
pr.Base.Ref = toRepo.Branch
}
if pr.Head.Ref == "" {
pr.Head.Ref = fromRepo.Branch
}
return &scm.PullRequestHook{
Action: scm.ActionOpen,
Repo: *toRepo,
PullRequest: *pr,
Sender: *sender,
}
}
func convertPullRequestCommentHook(src *pullRequestCommentHook) *scm.PullRequestCommentHook {
toRepo := convertRepository(&src.PullRequest.ToRef.Repository)
fromRepo := convertRepository(&src.PullRequest.FromRef.Repository)
pr := convertPullRequest(src.PullRequest)
author := src.Comment.Author
if author == nil {
author = src.Author
}
sender := convertUser(author)
pr.Base.Repo = *toRepo
pr.Head.Repo = *fromRepo
return &scm.PullRequestCommentHook{
Action: scm.ActionCreate,
Repo: *toRepo,
PullRequest: *pr,
Sender: *sender,
Comment: convertComment(src.Comment),
}
}
func convertComment(src *prComment) scm.Comment {
dst := scm.Comment{}
if src != nil {
dst.ID = src.ID
dst.Body = src.Text
author := convertUser(src.Author)
if author != nil {
dst.Author = *author
}
dst.Created = time.Unix(src.CreatedAt/1000, 0)
dst.Updated = time.Unix(src.UpdatedAt/1000, 0)
}
return dst
}
func convertPullRequestApprovalHook(src *pullRequestApprovalHook) *scm.ReviewHook {
toRepo := convertRepository(&src.PullRequest.ToRef.Repository)
fromRepo := convertRepository(&src.PullRequest.FromRef.Repository)
pr := convertPullRequest(src.PullRequest)
pr.Base.Repo = *toRepo
pr.Head.Repo = *fromRepo
if pr.Base.Ref == "" {
pr.Base.Ref = toRepo.Branch
}
if pr.Head.Ref == "" {
pr.Head.Ref = fromRepo.Branch
}
review := scm.Review{
State: convertReviewStateFromEvent(src.EventKey),
Author: *convertUser(&src.Participant.User),
}
return &scm.ReviewHook{
PullRequest: *pr,
Repo: *toRepo,
Review: review,
}
}
func convertReviewStateFromEvent(src string) string {
switch src {
case "pr:reviewer:approved":
return scm.ReviewStateApproved
case "pr:reviewer:unapproved":
return scm.ReviewStateDismissed
case "pr:reviewer:needs_work":
return scm.ReviewStateChangesRequested
default:
return scm.ReviewStatePending
}
}