312 lines
9.8 KiB
Go
312 lines
9.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package webhook
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import (
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"bytes"
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"context"
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"crypto/sha1"
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"encoding/hex"
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"fmt"
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"net/http"
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"net/url"
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"regexp"
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"strings"
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webhook_model "code.gitea.io/gitea/models/webhook"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/json"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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api "code.gitea.io/gitea/modules/structs"
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"code.gitea.io/gitea/modules/util"
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webhook_module "code.gitea.io/gitea/modules/webhook"
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"code.gitea.io/gitea/services/forms"
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)
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type matrixHandler struct{}
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func (matrixHandler) Type() webhook_module.HookType { return webhook_module.MATRIX }
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func (matrixHandler) FormFields(bind func(any)) FormFields {
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var form struct {
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forms.WebhookForm
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HomeserverURL string `binding:"Required;ValidUrl"`
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RoomID string `binding:"Required"`
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MessageType int
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// enforce requirement of authorization_header
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// (value will still be set in the embedded WebhookForm)
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AuthorizationHeader string `binding:"Required"`
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}
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bind(&form)
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return FormFields{
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WebhookForm: form.WebhookForm,
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URL: fmt.Sprintf("%s/_matrix/client/r0/rooms/%s/send/m.room.message", form.HomeserverURL, url.PathEscape(form.RoomID)),
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ContentType: webhook_model.ContentTypeJSON,
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Secret: "",
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HTTPMethod: http.MethodPut,
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Metadata: &MatrixMeta{
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HomeserverURL: form.HomeserverURL,
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Room: form.RoomID,
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MessageType: form.MessageType,
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},
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}
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}
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func (matrixHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
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meta := &MatrixMeta{}
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if err := json.Unmarshal([]byte(w.Meta), meta); err != nil {
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return nil, nil, fmt.Errorf("matrixHandler.NewRequest meta json: %w", err)
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}
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mc := matrixConvertor{
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MsgType: messageTypeText[meta.MessageType],
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}
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payload, err := newPayload(mc, []byte(t.PayloadContent), t.EventType)
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if err != nil {
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return nil, nil, err
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}
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body, err := json.MarshalIndent(payload, "", " ")
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if err != nil {
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return nil, nil, err
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}
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txnID, err := getMatrixTxnID(body)
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if err != nil {
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return nil, nil, err
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}
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req, err := http.NewRequest(http.MethodPut, w.URL+"/"+txnID, bytes.NewReader(body))
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if err != nil {
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return nil, nil, err
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}
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req.Header.Set("Content-Type", "application/json")
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return req, body, addDefaultHeaders(req, []byte(w.Secret), t, body) // likely useless, but has always been sent historially
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}
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const matrixPayloadSizeLimit = 1024 * 64
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// MatrixMeta contains the Matrix metadata
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type MatrixMeta struct {
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HomeserverURL string `json:"homeserver_url"`
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Room string `json:"room_id"`
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MessageType int `json:"message_type"`
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}
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var messageTypeText = map[int]string{
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1: "m.notice",
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2: "m.text",
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}
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// Metadata returns Matrix metadata
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func (matrixHandler) Metadata(w *webhook_model.Webhook) any {
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s := &MatrixMeta{}
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if err := json.Unmarshal([]byte(w.Meta), s); err != nil {
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log.Error("matrixHandler.Metadata(%d): %v", w.ID, err)
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}
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return s
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}
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// MatrixPayload contains payload for a Matrix room
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type MatrixPayload struct {
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Body string `json:"body"`
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MsgType string `json:"msgtype"`
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Format string `json:"format"`
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FormattedBody string `json:"formatted_body"`
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Commits []*api.PayloadCommit `json:"io.gitea.commits,omitempty"`
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}
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var _ payloadConvertor[MatrixPayload] = matrixConvertor{}
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type matrixConvertor struct {
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MsgType string
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}
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func (m matrixConvertor) newPayload(text string, commits ...*api.PayloadCommit) (MatrixPayload, error) {
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return MatrixPayload{
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Body: getMessageBody(text),
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MsgType: m.MsgType,
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Format: "org.matrix.custom.html",
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FormattedBody: text,
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Commits: commits,
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}, nil
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}
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// Create implements payloadConvertor Create method
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func (m matrixConvertor) Create(p *api.CreatePayload) (MatrixPayload, error) {
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repoLink := htmlLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
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refLink := MatrixLinkToRef(p.Repo.HTMLURL, p.Ref)
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text := fmt.Sprintf("[%s:%s] %s created by %s", repoLink, refLink, p.RefType, p.Sender.UserName)
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return m.newPayload(text)
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}
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// Delete composes Matrix payload for delete a branch or tag.
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func (m matrixConvertor) Delete(p *api.DeletePayload) (MatrixPayload, error) {
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refName := git.RefName(p.Ref).ShortName()
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repoLink := htmlLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
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text := fmt.Sprintf("[%s:%s] %s deleted by %s", repoLink, refName, p.RefType, p.Sender.UserName)
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return m.newPayload(text)
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}
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// Fork composes Matrix payload for forked by a repository.
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func (m matrixConvertor) Fork(p *api.ForkPayload) (MatrixPayload, error) {
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baseLink := htmlLinkFormatter(p.Forkee.HTMLURL, p.Forkee.FullName)
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forkLink := htmlLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
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text := fmt.Sprintf("%s is forked to %s", baseLink, forkLink)
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return m.newPayload(text)
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}
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// Issue implements payloadConvertor Issue method
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func (m matrixConvertor) Issue(p *api.IssuePayload) (MatrixPayload, error) {
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text, _, _, _ := getIssuesPayloadInfo(p, htmlLinkFormatter, true)
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return m.newPayload(text)
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}
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// IssueComment implements payloadConvertor IssueComment method
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func (m matrixConvertor) IssueComment(p *api.IssueCommentPayload) (MatrixPayload, error) {
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text, _, _ := getIssueCommentPayloadInfo(p, htmlLinkFormatter, true)
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return m.newPayload(text)
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}
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// Wiki implements payloadConvertor Wiki method
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func (m matrixConvertor) Wiki(p *api.WikiPayload) (MatrixPayload, error) {
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text, _, _ := getWikiPayloadInfo(p, htmlLinkFormatter, true)
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return m.newPayload(text)
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}
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// Release implements payloadConvertor Release method
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func (m matrixConvertor) Release(p *api.ReleasePayload) (MatrixPayload, error) {
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text, _ := getReleasePayloadInfo(p, htmlLinkFormatter, true)
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return m.newPayload(text)
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}
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// Push implements payloadConvertor Push method
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func (m matrixConvertor) Push(p *api.PushPayload) (MatrixPayload, error) {
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var commitDesc string
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if p.TotalCommits == 1 {
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commitDesc = "1 commit"
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} else {
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commitDesc = fmt.Sprintf("%d commits", p.TotalCommits)
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}
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repoLink := htmlLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
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branchLink := MatrixLinkToRef(p.Repo.HTMLURL, p.Ref)
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text := fmt.Sprintf("[%s] %s pushed %s to %s:<br>", repoLink, p.Pusher.UserName, commitDesc, branchLink)
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// for each commit, generate a new line text
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for i, commit := range p.Commits {
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text += fmt.Sprintf("%s: %s - %s", htmlLinkFormatter(commit.URL, commit.ID[:7]), commit.Message, commit.Author.Name)
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// add linebreak to each commit but the last
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if i < len(p.Commits)-1 {
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text += "<br>"
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}
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}
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return m.newPayload(text, p.Commits...)
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}
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// PullRequest implements payloadConvertor PullRequest method
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func (m matrixConvertor) PullRequest(p *api.PullRequestPayload) (MatrixPayload, error) {
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text, _, _, _ := getPullRequestPayloadInfo(p, htmlLinkFormatter, true)
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return m.newPayload(text)
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}
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// Review implements payloadConvertor Review method
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func (m matrixConvertor) Review(p *api.PullRequestPayload, event webhook_module.HookEventType) (MatrixPayload, error) {
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senderLink := htmlLinkFormatter(setting.AppURL+url.PathEscape(p.Sender.UserName), p.Sender.UserName)
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title := fmt.Sprintf("#%d %s", p.Index, p.PullRequest.Title)
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titleLink := htmlLinkFormatter(p.PullRequest.HTMLURL, title)
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repoLink := htmlLinkFormatter(p.Repository.HTMLURL, p.Repository.FullName)
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var text string
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switch p.Action {
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case api.HookIssueReviewed:
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action, err := parseHookPullRequestEventType(event)
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if err != nil {
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return MatrixPayload{}, err
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}
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text = fmt.Sprintf("[%s] Pull request review %s: %s by %s", repoLink, action, titleLink, senderLink)
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}
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return m.newPayload(text)
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}
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// Repository implements payloadConvertor Repository method
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func (m matrixConvertor) Repository(p *api.RepositoryPayload) (MatrixPayload, error) {
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senderLink := htmlLinkFormatter(setting.AppURL+p.Sender.UserName, p.Sender.UserName)
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repoLink := htmlLinkFormatter(p.Repository.HTMLURL, p.Repository.FullName)
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var text string
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switch p.Action {
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case api.HookRepoCreated:
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text = fmt.Sprintf("[%s] Repository created by %s", repoLink, senderLink)
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case api.HookRepoDeleted:
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text = fmt.Sprintf("[%s] Repository deleted by %s", repoLink, senderLink)
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}
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return m.newPayload(text)
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}
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func (m matrixConvertor) Package(p *api.PackagePayload) (MatrixPayload, error) {
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senderLink := htmlLinkFormatter(setting.AppURL+p.Sender.UserName, p.Sender.UserName)
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packageLink := htmlLinkFormatter(p.Package.HTMLURL, p.Package.Name)
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var text string
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switch p.Action {
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case api.HookPackageCreated:
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text = fmt.Sprintf("[%s] Package published by %s", packageLink, senderLink)
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case api.HookPackageDeleted:
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text = fmt.Sprintf("[%s] Package deleted by %s", packageLink, senderLink)
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}
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return m.newPayload(text)
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}
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var urlRegex = regexp.MustCompile(`<a [^>]*?href="([^">]*?)">(.*?)</a>`)
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func getMessageBody(htmlText string) string {
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htmlText = urlRegex.ReplaceAllString(htmlText, "[$2]($1)")
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htmlText = strings.ReplaceAll(htmlText, "<br>", "\n")
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return htmlText
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}
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// getMatrixTxnID computes the transaction ID to ensure idempotency
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func getMatrixTxnID(payload []byte) (string, error) {
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if len(payload) >= matrixPayloadSizeLimit {
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return "", fmt.Errorf("getMatrixTxnID: payload size %d > %d", len(payload), matrixPayloadSizeLimit)
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}
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h := sha1.New()
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_, err := h.Write(payload)
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if err != nil {
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return "", err
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}
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return hex.EncodeToString(h.Sum(nil)), nil
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}
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// MatrixLinkToRef Matrix-formatter link to a repo ref
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func MatrixLinkToRef(repoURL, ref string) string {
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refName := git.RefName(ref).ShortName()
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switch {
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case strings.HasPrefix(ref, git.BranchPrefix):
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return htmlLinkFormatter(repoURL+"/src/branch/"+util.PathEscapeSegments(refName), refName)
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case strings.HasPrefix(ref, git.TagPrefix):
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return htmlLinkFormatter(repoURL+"/src/tag/"+util.PathEscapeSegments(refName), refName)
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default:
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return htmlLinkFormatter(repoURL+"/src/commit/"+util.PathEscapeSegments(refName), refName)
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}
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}
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