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endpoint.go
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endpoint.go
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// Copyright (C) 2021 Storj Labs, Inc.
// See LICENSE for copying information.
package backend
import (
"encoding/json"
"net/http"
"github.com/gorilla/mux"
"github.com/zeebo/errs"
"go.uber.org/zap"
)
var ErrEndpoint = errs.Class("backend endpoint")
type Endpoint struct {
log *zap.Logger
service *Service
}
func NewEndpoint(log *zap.Logger, service *Service) *Endpoint {
return &Endpoint{
log: log,
service: service,
}
}
func (endpoint *Endpoint) Register(router *mux.Router) {
router.HandleFunc("/status", endpoint.Status).Methods(http.MethodGet)
router.HandleFunc("/start", endpoint.Start).Methods(http.MethodPost)
router.HandleFunc("/stop", endpoint.Stop).Methods(http.MethodPost)
router.HandleFunc("/configure", endpoint.Configure).Methods(http.MethodPost)
router.HandleFunc("/images/local", endpoint.LocalImages).Methods(http.MethodGet)
router.HandleFunc("/images/remote", endpoint.RemoteImages).Methods(http.MethodGet)
router.HandleFunc("/push", endpoint.Push).Methods(http.MethodPost)
router.HandleFunc("/pull", endpoint.Pull).Methods(http.MethodPost)
}
func (endpoint *Endpoint) Status(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
st, err := endpoint.service.Status()
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
resp := struct {
Status string `json:"status"`
}{
Status: st,
}
err = json.NewEncoder(w).Encode(resp)
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
if err != nil {
endpoint.log.Error("failed to write json pins response", zap.Error(ErrEndpoint.Wrap(err)))
return
}
}
func (endpoint *Endpoint) Configure(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
req := struct {
Bucket string `json:"bucket"`
Grant string `json:"grant"`
}{}
err = json.NewDecoder(r.Body).Decode(&req)
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
err = endpoint.service.Configure(req.Bucket, req.Grant)
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
}
func (endpoint *Endpoint) Push(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
req := struct {
Image string `json:"image"`
Tag string `json:"tag"`
}{}
err = json.NewDecoder(r.Body).Decode(&req)
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
err = endpoint.service.Push(req.Image, req.Tag)
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
}
func (endpoint *Endpoint) Pull(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
req := struct {
Image string `json:"image"`
Tag string `json:"tag"`
}{}
err = json.NewDecoder(r.Body).Decode(&req)
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
err = endpoint.service.Pull(req.Image, req.Tag)
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
}
func (endpoint *Endpoint) Start(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
err = endpoint.service.Start()
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
}
func (endpoint *Endpoint) Stop(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
err = endpoint.service.Stop()
if err != nil {
endpoint.serveJSONError(w, http.StatusBadRequest, err)
return
}
}
func (endpoint *Endpoint) LocalImages(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
images, err := endpoint.service.LocalImages()
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
err = json.NewEncoder(w).Encode(&images)
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
}
func (endpoint *Endpoint) RemoteImages(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
var err error
defer mon.Task()(&ctx)(&err)
images, err := endpoint.service.RemoteImages()
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
err = json.NewEncoder(w).Encode(&images)
if err != nil {
endpoint.serveJSONError(w, http.StatusInternalServerError, err)
return
}
}
// serveJSONError writes JSON error to response output stream.
func (endpoint *Endpoint) serveJSONError(w http.ResponseWriter, status int, err error) {
w.WriteHeader(status)
var response struct {
Error string `json:"error"`
}
response.Error = err.Error()
err = json.NewEncoder(w).Encode(response)
if err != nil {
endpoint.log.Error("failed to write json error response", zap.Error(ErrEndpoint.Wrap(err)))
return
}
}