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webhook.go
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webhook.go
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package webhook
import (
"fmt"
"html"
"net/http"
log "github.com/sirupsen/logrus"
"github.com/padok-team/burrito/internal/burrito/config"
"github.com/padok-team/burrito/internal/webhook/event"
"github.com/padok-team/burrito/internal/webhook/github"
"github.com/padok-team/burrito/internal/webhook/gitlab"
"k8s.io/apimachinery/pkg/runtime"
configv1alpha1 "github.com/padok-team/burrito/api/v1alpha1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type Handler interface {
Handle()
}
type Webhook struct {
client.Client
Config *config.Config
Providers []Provider
}
func New(c *config.Config) *Webhook {
return &Webhook{
Config: c,
}
}
type Provider interface {
Init(*config.Config) error
IsFromProvider(*http.Request) bool
GetEvent(*http.Request) (event.Event, error)
}
func (w *Webhook) Init() error {
scheme := runtime.NewScheme()
utilruntime.Must(clientgoscheme.AddToScheme(scheme))
utilruntime.Must(configv1alpha1.AddToScheme(scheme))
cl, err := client.New(ctrl.GetConfigOrDie(), client.Options{
Scheme: scheme,
})
if err != nil {
return err
}
w.Client = cl
providers := []Provider{}
for _, p := range []Provider{&github.Github{}, &gitlab.Gitlab{}} {
err = p.Init(w.Config)
if err != nil {
log.Warnf("failed to initialize webhook provider: %s", err)
continue
}
providers = append(providers, p)
}
if len(providers) == 0 {
log.Warnf("no webhook provider initialized, every event will be considered as unknown")
}
w.Providers = providers
return nil
}
func (w *Webhook) GetHttpHandler() func(http.ResponseWriter, *http.Request) {
log.Infof("webhook event received...")
return func(writer http.ResponseWriter, r *http.Request) {
var err error
var event event.Event
for _, p := range w.Providers {
if p.IsFromProvider(r) {
event, err = p.GetEvent(r)
break
}
}
if err != nil {
log.Errorf("webhook processing failed: %s", err)
status := http.StatusBadRequest
if r.Method != "POST" {
status = http.StatusMethodNotAllowed
}
http.Error(writer, fmt.Sprintf("webhook processing failed: %s", html.EscapeString(err.Error())), status)
return
}
if event == nil {
log.Infof("ignoring unknown webhook event")
http.Error(writer, "Unknown webhook event", http.StatusBadRequest)
}
err = event.Handle(w.Client)
if err != nil {
log.Errorf("webhook processing worked but errored during event handling: %s", err)
}
}
}