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handler.go
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/
handler.go
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// Copyright 2018 The Harbor Authors. All rights reserved.
package api
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"strings"
"github.com/gorilla/mux"
"github.com/vmware/harbor/src/jobservice/core"
"github.com/vmware/harbor/src/jobservice/errs"
"github.com/vmware/harbor/src/jobservice/models"
"github.com/vmware/harbor/src/jobservice/opm"
)
//Handler defines approaches to handle the http requests.
type Handler interface {
//HandleLaunchJobReq is used to handle the job submission request.
HandleLaunchJobReq(w http.ResponseWriter, req *http.Request)
//HandleGetJobReq is used to handle the job stats query request.
HandleGetJobReq(w http.ResponseWriter, req *http.Request)
//HandleJobActionReq is used to handle the job action requests (stop/retry).
HandleJobActionReq(w http.ResponseWriter, req *http.Request)
//HandleCheckStatusReq is used to handle the job service healthy status checking request.
HandleCheckStatusReq(w http.ResponseWriter, req *http.Request)
//HandleJobLogReq is used to handle the request of getting job logs
HandleJobLogReq(w http.ResponseWriter, req *http.Request)
}
//DefaultHandler is the default request handler which implements the Handler interface.
type DefaultHandler struct {
controller core.Interface
}
//NewDefaultHandler is constructor of DefaultHandler.
func NewDefaultHandler(ctl core.Interface) *DefaultHandler {
return &DefaultHandler{
controller: ctl,
}
}
//HandleLaunchJobReq is implementation of method defined in interface 'Handler'
func (dh *DefaultHandler) HandleLaunchJobReq(w http.ResponseWriter, req *http.Request) {
if !dh.preCheck(w) {
return
}
data, err := ioutil.ReadAll(req.Body)
if err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.ReadRequestBodyError(err))
return
}
//unmarshal data
jobReq := models.JobRequest{}
if err = json.Unmarshal(data, &jobReq); err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.HandleJSONDataError(err))
return
}
//Pass request to the controller for the follow-up.
jobStats, err := dh.controller.LaunchJob(jobReq)
if err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.LaunchJobError(err))
return
}
data, ok := dh.handleJSONData(w, jobStats)
if !ok {
return
}
w.WriteHeader(http.StatusAccepted)
w.Write(data)
}
//HandleGetJobReq is implementation of method defined in interface 'Handler'
func (dh *DefaultHandler) HandleGetJobReq(w http.ResponseWriter, req *http.Request) {
if !dh.preCheck(w) {
return
}
vars := mux.Vars(req)
jobID := vars["job_id"]
jobStats, err := dh.controller.GetJob(jobID)
if err != nil {
code := http.StatusInternalServerError
backErr := errs.GetJobStatsError(err)
if errs.IsObjectNotFoundError(err) {
code = http.StatusNotFound
backErr = err
}
dh.handleError(w, code, backErr)
return
}
data, ok := dh.handleJSONData(w, jobStats)
if !ok {
return
}
w.WriteHeader(http.StatusOK)
w.Write(data)
}
//HandleJobActionReq is implementation of method defined in interface 'Handler'
func (dh *DefaultHandler) HandleJobActionReq(w http.ResponseWriter, req *http.Request) {
if !dh.preCheck(w) {
return
}
vars := mux.Vars(req)
jobID := vars["job_id"]
data, err := ioutil.ReadAll(req.Body)
if err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.ReadRequestBodyError(err))
return
}
//unmarshal data
jobActionReq := models.JobActionRequest{}
if err = json.Unmarshal(data, &jobActionReq); err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.HandleJSONDataError(err))
return
}
switch jobActionReq.Action {
case opm.CtlCommandStop:
if err := dh.controller.StopJob(jobID); err != nil {
code := http.StatusInternalServerError
backErr := errs.StopJobError(err)
if errs.IsObjectNotFoundError(err) {
code = http.StatusNotFound
backErr = err
}
dh.handleError(w, code, backErr)
return
}
case opm.CtlCommandCancel:
if err := dh.controller.CancelJob(jobID); err != nil {
code := http.StatusInternalServerError
backErr := errs.CancelJobError(err)
if errs.IsObjectNotFoundError(err) {
code = http.StatusNotFound
backErr = err
}
dh.handleError(w, code, backErr)
return
}
case opm.CtlCommandRetry:
if err := dh.controller.RetryJob(jobID); err != nil {
code := http.StatusInternalServerError
backErr := errs.RetryJobError(err)
if errs.IsObjectNotFoundError(err) {
code = http.StatusNotFound
backErr = err
}
dh.handleError(w, code, backErr)
return
}
default:
dh.handleError(w, http.StatusNotImplemented, errs.UnknownActionNameError(fmt.Errorf("%s", jobID)))
return
}
w.WriteHeader(http.StatusNoContent) //only header, no content returned
}
//HandleCheckStatusReq is implementation of method defined in interface 'Handler'
func (dh *DefaultHandler) HandleCheckStatusReq(w http.ResponseWriter, req *http.Request) {
if !dh.preCheck(w) {
return
}
stats, err := dh.controller.CheckStatus()
if err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.CheckStatsError(err))
return
}
data, ok := dh.handleJSONData(w, stats)
if !ok {
return
}
w.WriteHeader(http.StatusOK)
w.Write(data)
}
//HandleJobLogReq is implementation of method defined in interface 'Handler'
func (dh *DefaultHandler) HandleJobLogReq(w http.ResponseWriter, req *http.Request) {
if !dh.preCheck(w) {
return
}
vars := mux.Vars(req)
jobID := vars["job_id"]
if strings.Contains(jobID, "..") || strings.ContainsRune(jobID, os.PathSeparator) {
dh.handleError(w, http.StatusBadRequest, fmt.Errorf("Invalid Job ID: %s", jobID))
return
}
logData, err := dh.controller.GetJobLogData(jobID)
if err != nil {
code := http.StatusInternalServerError
backErr := errs.GetJobLogError(err)
if errs.IsObjectNotFoundError(err) {
code = http.StatusNotFound
backErr = err
}
dh.handleError(w, code, backErr)
return
}
w.WriteHeader(http.StatusOK)
w.Write(logData)
}
func (dh *DefaultHandler) handleJSONData(w http.ResponseWriter, object interface{}) ([]byte, bool) {
data, err := json.Marshal(object)
if err != nil {
dh.handleError(w, http.StatusInternalServerError, errs.HandleJSONDataError(err))
return nil, false
}
return data, true
}
func (dh *DefaultHandler) handleError(w http.ResponseWriter, code int, err error) {
w.WriteHeader(code)
w.Write([]byte(err.Error()))
}
func (dh *DefaultHandler) preCheck(w http.ResponseWriter) bool {
if dh.controller == nil {
dh.handleError(w, http.StatusInternalServerError, errs.MissingBackendHandlerError(fmt.Errorf("nil controller")))
return false
}
return true
}