receive docker hub notification

2018-11-21 17:06:21 -08:00
parent 26ca2ef893
commit a92dd933ba
3 changed files with 260 additions and 0 deletions
@@ -0,0 +1,131 @@
+package docker
+
+// this package recieves the Docker Hub Automated Build webhook
+// https://docs.docker.com/docker-hub/webhooks/
+// NOT the Docker Trusted Registry webhook
+// https://docs.docker.com/ee/dtr/user/create-and-manage-webhooks/
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+
+	log "github.com/Sirupsen/logrus"
+)
+
+// parse errors
+var (
+	ErrInvalidHTTPMethod = errors.New("invalid HTTP Method")
+	ErrParsingPayload    = errors.New("error parsing payload")
+)
+
+// Event defines a GitHub hook event type
+type Event string
+
+// GitHub hook types
+const (
+	BuildEvent Event = "build"
+)
+
+// BuildPayload a docker hub build notice
+// https://docs.docker.com/docker-hub/webhooks/
+type BuildPayload struct {
+	CallbackURL string `json:"callback_url"`
+	PushData    struct {
+		Images   []string `json:"images"`
+		PushedAt float32  `json:"pushed_at"`
+		Pusher   string   `json:"pusher"`
+		Tag      string   `json:"tag"`
+	} `json:"push_data"`
+	Repository struct {
+		CommentCount    int     `json:"comment_count"`
+		DateCreated     float32 `json:"date_created"`
+		Description     string  `json:"description"`
+		Dockerfile      string  `json:"dockerfile"`
+		FullDescription string  `json:"full_description"`
+		IsOfficial      bool    `json:"is_official"`
+		IsPrivate       bool    `json:"is_private"`
+		IsTrusted       bool    `json:"is_trusted"`
+		Name            string  `json:"name"`
+		Namespace       string  `json:"namespace"`
+		Owner           string  `json:"owner"`
+		RepoName        string  `json:"repo_name"`
+		RepoURL         string  `json:"repo_url"`
+		StarCount       int     `json:"star_count"`
+		Status          string  `json:"status"`
+	} `json:"repository"`
+}
+
+// there are no options for docker webhooks
+// however I'm leaving this here for now in anticipation of future support for Docker Trusted Registry
+
+// // Option is a configuration option for the webhook
+// type Option func(*Webhook) error
+
+// // Options is a namespace var for configuration options
+// var Options = WebhookOptions{}
+
+// // WebhookOptions is a namespace for configuration option methods
+// type WebhookOptions struct{}
+
+// // Secret registers the GitHub secret
+// func (WebhookOptions) Secret(secret string) Option {
+// 	return func(hook *Webhook) error {
+// 		hook.secret = secret
+// 		return nil
+// 	}
+// }
+
+// Webhook instance contains all methods needed to process events
+type Webhook struct {
+	secret string
+}
+
+// New creates and returns a WebHook instance denoted by the Provider type
+func New() (*Webhook, error) {
+	// func New(options ...Option) (*Webhook, error) {
+	hook := new(Webhook)
+	// for _, opt := range options {
+	// 	if err := opt(hook); err != nil {
+	// 		return nil, errors.New("Error applying Option")
+	// 	}
+	// }
+	return hook, nil
+}
+
+// Parse verifies and parses the events specified and returns the payload object or an error
+func (hook Webhook) Parse(r *http.Request, events ...Event) (interface{}, error) {
+	defer func() {
+		_, _ = io.Copy(ioutil.Discard, r.Body)
+		_ = r.Body.Close()
+	}()
+
+	if r.Method != http.MethodPost {
+		return nil, ErrInvalidHTTPMethod
+	}
+
+	// event := r.Header.Get("X-GitHub-Event")
+	// if event == "" {
+	// 	return nil, ErrMissingGithubEventHeader
+	// }
+	// gitHubEvent := Event(event)
+
+	payload, err := ioutil.ReadAll(r.Body)
+	if err != nil || len(payload) == 0 {
+		log.Error(ErrParsingPayload)
+		log.Error(err)
+		return nil, ErrParsingPayload
+	}
+
+	var pl BuildPayload
+	err = json.Unmarshal([]byte(payload), &pl)
+	if err != nil {
+		log.Error(ErrParsingPayload)
+		log.Error(err)
+		return nil, ErrParsingPayload
+	}
+	return pl, err
+
+}