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generic.go
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generic.go
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package generic
import (
"encoding/json"
"fmt"
"io/ioutil"
"mime"
"net/http"
"github.com/golang/glog"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/util/yaml"
"github.com/openshift/origin/pkg/build/api"
"github.com/openshift/origin/pkg/build/webhook"
)
// WebHookPlugin used for processing manual(or other) webhook requests.
type WebHookPlugin struct{}
// New returns a generic webhook plugin.
func New() *WebHookPlugin {
return &WebHookPlugin{}
}
// Extract services generic webhooks.
func (p *WebHookPlugin) Extract(buildCfg *api.BuildConfig, secret, path string, req *http.Request) (revision *api.SourceRevision, envvars []kapi.EnvVar, proceed bool, err error) {
triggers, err := webhook.FindTriggerPolicy(api.GenericWebHookBuildTriggerType, buildCfg)
if err != nil {
return revision, envvars, false, err
}
glog.V(4).Infof("Checking if the provided secret for BuildConfig %s/%s matches", buildCfg.Namespace, buildCfg.Name)
trigger, err := webhook.ValidateWebHookSecret(triggers, secret)
if err != nil {
return revision, envvars, false, err
}
glog.V(4).Infof("Verifying build request for BuildConfig %s/%s", buildCfg.Namespace, buildCfg.Name)
if err = verifyRequest(req); err != nil {
return revision, envvars, false, err
}
contentType := req.Header.Get("Content-Type")
if len(contentType) != 0 {
contentType, _, err = mime.ParseMediaType(contentType)
if err != nil {
return revision, envvars, false, errors.NewBadRequest(fmt.Sprintf("error parsing Content-Type: %s", err))
}
}
if req.Body == nil {
return revision, envvars, true, nil
}
if contentType != "application/json" && contentType != "application/yaml" {
warning := webhook.NewWarning("invalid Content-Type on payload, ignoring payload and continuing with build")
return revision, envvars, true, warning
}
body, err := ioutil.ReadAll(req.Body)
if err != nil {
return revision, envvars, false, errors.NewBadRequest(err.Error())
}
if len(body) == 0 {
return revision, envvars, true, nil
}
var data api.GenericWebHookEvent
if contentType == "application/yaml" {
body, err = yaml.ToJSON(body)
if err != nil {
warning := webhook.NewWarning(fmt.Sprintf("error converting payload to json: %v, ignoring payload and continuing with build", err))
return revision, envvars, true, warning
}
}
if err = json.Unmarshal(body, &data); err != nil {
warning := webhook.NewWarning(fmt.Sprintf("error unmarshalling payload: %v, ignoring payload and continuing with build", err))
return revision, envvars, true, warning
}
if len(data.Env) > 0 && trigger.AllowEnv {
envvars = data.Env
}
if buildCfg.Spec.Source.Git == nil {
// everything below here is specific to git-based builds
return revision, envvars, true, nil
}
if data.Git == nil {
warning := webhook.NewWarning("no git information found in payload, ignoring and continuing with build")
return revision, envvars, true, warning
}
if data.Git.Refs != nil {
for _, ref := range data.Git.Refs {
if webhook.GitRefMatches(ref.Ref, webhook.DefaultConfigRef, &buildCfg.Spec.Source) {
revision = &api.SourceRevision{
Git: &ref.GitSourceRevision,
}
return revision, envvars, true, nil
}
}
warning := webhook.NewWarning(fmt.Sprintf("skipping build. None of the supplied refs matched %q", buildCfg.Spec.Source.Git.Ref))
return revision, envvars, false, warning
}
if !webhook.GitRefMatches(data.Git.Ref, webhook.DefaultConfigRef, &buildCfg.Spec.Source) {
warning := webhook.NewWarning(fmt.Sprintf("skipping build. Branch reference from %q does not match configuration", data.Git.Ref))
return revision, envvars, false, warning
}
revision = &api.SourceRevision{
Git: &data.Git.GitSourceRevision,
}
return revision, envvars, true, nil
}
func verifyRequest(req *http.Request) error {
if req.Method != "POST" {
return webhook.MethodNotSupported
}
return nil
}