forgejo/services/webhook/webhook.go
2024-04-30 09:38:35 +02:00

270 lines
7 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package webhook
import (
"context"
"errors"
"fmt"
"html/template"
"net/http"
"strings"
"code.gitea.io/gitea/models/db"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
webhook_model "code.gitea.io/gitea/models/webhook"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/optional"
"code.gitea.io/gitea/modules/queue"
"code.gitea.io/gitea/modules/setting"
api "code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/util"
webhook_module "code.gitea.io/gitea/modules/webhook"
"code.gitea.io/gitea/services/forms"
"code.gitea.io/gitea/services/webhook/sourcehut"
"github.com/gobwas/glob"
)
type Handler interface {
Type() webhook_module.HookType
Metadata(*webhook_model.Webhook) any
// UnmarshalForm provides a function to bind the request to the form.
// If form implements the [binding.Validator] interface, the Validate method will be called
UnmarshalForm(bind func(form any)) forms.WebhookForm
NewRequest(context.Context, *webhook_model.Webhook, *webhook_model.HookTask) (req *http.Request, body []byte, err error)
Icon(size int) template.HTML
}
var webhookHandlers = []Handler{
defaultHandler{true},
defaultHandler{false},
gogsHandler{},
slackHandler{},
discordHandler{},
dingtalkHandler{},
telegramHandler{},
msteamsHandler{},
feishuHandler{},
matrixHandler{},
wechatworkHandler{},
packagistHandler{},
sourcehut.BuildsHandler{},
}
// GetWebhookHandler return the handler for a given webhook type (nil if not found)
func GetWebhookHandler(name webhook_module.HookType) Handler {
for _, h := range webhookHandlers {
if h.Type() == name {
return h
}
}
return nil
}
// List provides a list of the supported webhooks
func List() []Handler {
return webhookHandlers
}
// IsValidHookTaskType returns true if a webhook registered
func IsValidHookTaskType(name string) bool {
return GetWebhookHandler(name) != nil
}
// hookQueue is a global queue of web hooks
var hookQueue *queue.WorkerPoolQueue[int64]
// getPayloadBranch returns branch for hook event, if applicable.
func getPayloadBranch(p api.Payloader) string {
var ref string
switch pp := p.(type) {
case *api.CreatePayload:
ref = pp.Ref
case *api.DeletePayload:
ref = pp.Ref
case *api.PushPayload:
ref = pp.Ref
}
if strings.HasPrefix(ref, git.BranchPrefix) {
return ref[len(git.BranchPrefix):]
}
return ""
}
// EventSource represents the source of a webhook action. Repository and/or Owner must be set.
type EventSource struct {
Repository *repo_model.Repository
Owner *user_model.User
}
// handle delivers hook tasks
func handler(items ...int64) []int64 {
ctx := graceful.GetManager().HammerContext()
for _, taskID := range items {
task, err := webhook_model.GetHookTaskByID(ctx, taskID)
if err != nil {
if errors.Is(err, util.ErrNotExist) {
log.Warn("GetHookTaskByID[%d] warn: %v", taskID, err)
} else {
log.Error("GetHookTaskByID[%d] failed: %v", taskID, err)
}
continue
}
if task.IsDelivered {
// Already delivered in the meantime
log.Trace("Task[%d] has already been delivered", task.ID)
continue
}
if err := Deliver(ctx, task); err != nil {
log.Error("Unable to deliver webhook task[%d]: %v", task.ID, err)
}
}
return nil
}
func enqueueHookTask(taskID int64) error {
err := hookQueue.Push(taskID)
if err != nil && err != queue.ErrAlreadyInQueue {
return err
}
return nil
}
func checkBranch(w *webhook_model.Webhook, branch string) bool {
if w.BranchFilter == "" || w.BranchFilter == "*" {
return true
}
g, err := glob.Compile(w.BranchFilter)
if err != nil {
// should not really happen as BranchFilter is validated
log.Error("CheckBranch failed: %s", err)
return false
}
return g.Match(branch)
}
// PrepareWebhook creates a hook task and enqueues it for processing.
// The payload is saved as-is. The adjustments depending on the webhook type happen
// right before delivery, in the [Deliver] method.
func PrepareWebhook(ctx context.Context, w *webhook_model.Webhook, event webhook_module.HookEventType, p api.Payloader) error {
// Skip sending if webhooks are disabled.
if setting.DisableWebhooks {
return nil
}
for _, e := range w.EventCheckers() {
if event == e.Type {
if !e.Has() {
return nil
}
break
}
}
// Avoid sending "0 new commits" to non-integration relevant webhooks (e.g. slack, discord, etc.).
// Integration webhooks (e.g. drone) still receive the required data.
if pushEvent, ok := p.(*api.PushPayload); ok &&
w.Type != webhook_module.FORGEJO && w.Type != webhook_module.GITEA && w.Type != webhook_module.GOGS &&
len(pushEvent.Commits) == 0 {
return nil
}
// If payload has no associated branch (e.g. it's a new tag, issue, etc.),
// branch filter has no effect.
if branch := getPayloadBranch(p); branch != "" {
if !checkBranch(w, branch) {
log.Info("Branch %q doesn't match branch filter %q, skipping", branch, w.BranchFilter)
return nil
}
}
payload, err := p.JSONPayload()
if err != nil {
return fmt.Errorf("JSONPayload for %s: %w", event, err)
}
task, err := webhook_model.CreateHookTask(ctx, &webhook_model.HookTask{
HookID: w.ID,
PayloadContent: string(payload),
EventType: event,
PayloadVersion: 2,
})
if err != nil {
return fmt.Errorf("CreateHookTask for %s: %w", event, err)
}
return enqueueHookTask(task.ID)
}
// PrepareWebhooks adds new webhooks to task queue for given payload.
func PrepareWebhooks(ctx context.Context, source EventSource, event webhook_module.HookEventType, p api.Payloader) error {
owner := source.Owner
var ws []*webhook_model.Webhook
if source.Repository != nil {
repoHooks, err := db.Find[webhook_model.Webhook](ctx, webhook_model.ListWebhookOptions{
RepoID: source.Repository.ID,
IsActive: optional.Some(true),
})
if err != nil {
return fmt.Errorf("ListWebhooksByOpts: %w", err)
}
ws = append(ws, repoHooks...)
owner = source.Repository.MustOwner(ctx)
}
// append additional webhooks of a user or organization
if owner != nil {
ownerHooks, err := db.Find[webhook_model.Webhook](ctx, webhook_model.ListWebhookOptions{
OwnerID: owner.ID,
IsActive: optional.Some(true),
})
if err != nil {
return fmt.Errorf("ListWebhooksByOpts: %w", err)
}
ws = append(ws, ownerHooks...)
}
// Add any admin-defined system webhooks
systemHooks, err := webhook_model.GetSystemWebhooks(ctx, true)
if err != nil {
return fmt.Errorf("GetSystemWebhooks: %w", err)
}
ws = append(ws, systemHooks...)
if len(ws) == 0 {
return nil
}
for _, w := range ws {
if err := PrepareWebhook(ctx, w, event, p); err != nil {
return err
}
}
return nil
}
// ReplayHookTask replays a webhook task
func ReplayHookTask(ctx context.Context, w *webhook_model.Webhook, uuid string) error {
task, err := webhook_model.ReplayHookTask(ctx, w.ID, uuid)
if err != nil {
return err
}
return enqueueHookTask(task.ID)
}