agola/internal/gitsources/gitlab/parse.go

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// Copyright 2019 Sorint.lab
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
// See the License for the specific language governing permissions and
// limitations under the License.
package gitlab
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"strconv"
"strings"
2019-07-01 09:40:20 +00:00
"agola.io/agola/internal/services/types"
errors "golang.org/x/xerrors"
)
const (
hookEvent = "X-Gitlab-Event"
tokenHeader = "X-Gitlab-Token"
hookPush = "Push Hook"
hookTagPush = "Tag Push Hook"
hookPullRequest = "Merge Request Hook"
)
func (c *Client) ParseWebhook(r *http.Request, secret string) (*types.WebhookData, error) {
data, err := ioutil.ReadAll(io.LimitReader(r.Body, 10*1024*1024))
if err != nil {
return nil, err
}
// verify token (gitlab doesn't sign the payload but just returns the provided
// secret)
if secret != "" {
token := r.Header.Get(tokenHeader)
if token != secret {
return nil, errors.Errorf("wrong webhook token")
}
}
switch r.Header.Get(hookEvent) {
case hookPush:
return parsePushHook(data)
case hookTagPush:
return parsePushHook(data)
case hookPullRequest:
return parsePullRequestHook(data)
default:
return nil, errors.Errorf("unknown webhook event type: %q", r.Header.Get(hookEvent))
}
}
func parsePushHook(data []byte) (*types.WebhookData, error) {
push := new(pushHook)
err := json.Unmarshal(data, push)
if err != nil {
return nil, err
}
// skip push events with 0 commits. i.e. a tag deletion.
if len(push.Commits) == 0 {
return nil, nil
}
return webhookDataFromPush(push)
}
func parsePullRequestHook(data []byte) (*types.WebhookData, error) {
prhook := new(pullRequestHook)
err := json.Unmarshal(data, prhook)
if err != nil {
return nil, err
}
// TODO(sgotti) skip non open pull requests
// TODO(sgotti) only accept actions that have new commits
return webhookDataFromPullRequest(prhook), nil
}
func webhookDataFromPush(hook *pushHook) (*types.WebhookData, error) {
sender := hook.UserName
if sender == "" {
sender = hook.UserUsername
}
// common data
whd := &types.WebhookData{
CommitSHA: hook.After,
SSHURL: hook.Project.SSHURL,
Ref: hook.Ref,
CommitLink: hook.Commits[0].URL,
//CompareLink: hook.Compare,
//CommitLink: fmt.Sprintf("%s/commit/%s", hook.Repo.URL, hook.After),
Sender: sender,
Repo: types.WebhookDataRepo{
Path: hook.Project.PathWithNamespace,
WebURL: hook.Project.WebURL,
},
}
switch {
case strings.HasPrefix(hook.Ref, "refs/heads/"):
whd.Event = types.WebhookEventPush
whd.Branch = strings.TrimPrefix(hook.Ref, "refs/heads/")
whd.BranchLink = fmt.Sprintf("%s/tree/%s", hook.Project.WebURL, whd.Branch)
if len(hook.Commits) > 0 {
whd.Message = hook.Commits[0].Message
}
case strings.HasPrefix(hook.Ref, "refs/tags/"):
whd.Event = types.WebhookEventTag
whd.Tag = strings.TrimPrefix(hook.Ref, "refs/tags/")
whd.TagLink = fmt.Sprintf("%s/tree/%s", hook.Project.WebURL, whd.Tag)
whd.Message = fmt.Sprintf("Tag %s", whd.Tag)
default:
// ignore received webhook since it doesn't have a ref we're interested in
return nil, fmt.Errorf("unsupported webhook ref %q", hook.Ref)
}
return whd, nil
}
// helper function that extracts the Build data from a Gitea pull_request hook
func webhookDataFromPullRequest(hook *pullRequestHook) *types.WebhookData {
// TODO(sgotti) Use PR opener username or last commit user name?
sender := hook.User.Name
if sender == "" {
sender = hook.User.Username
}
//sender := hook.ObjectAttributes.LastCommit.Author.Name
//if sender == "" {
// sender := hook.ObjectAttributes.LastCommit.Author.UserName
//}
build := &types.WebhookData{
Event: types.WebhookEventPullRequest,
CommitSHA: hook.ObjectAttributes.LastCommit.ID,
SSHURL: hook.Project.SSHURL,
Ref: fmt.Sprintf("refs/merge-requests/%d/head", hook.ObjectAttributes.Iid),
//CommitLink: fmt.Sprintf("%s/commit/%s", hook.Repo.URL, hook.PullRequest.Head.Sha),
CommitLink: hook.ObjectAttributes.LastCommit.URL,
Branch: hook.ObjectAttributes.SourceBranch,
Message: hook.ObjectAttributes.Title,
Sender: sender,
PullRequestID: strconv.Itoa(hook.ObjectAttributes.Iid),
PullRequestLink: hook.ObjectAttributes.URL,
Repo: types.WebhookDataRepo{
Path: hook.Project.PathWithNamespace,
WebURL: hook.Project.WebURL,
},
}
return build
}