forked from cloudfoundry-attic/cloud-controller-stager
/
staging_handler.go
149 lines (122 loc) · 4.04 KB
/
staging_handler.go
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package handlers
import (
"encoding/json"
"io/ioutil"
"net/http"
"code.cloudfoundry.org/bbs"
"code.cloudfoundry.org/bbs/models"
"code.cloudfoundry.org/lager"
"code.cloudfoundry.org/runtimeschema/cc_messages"
"code.cloudfoundry.org/runtimeschema/metric"
"code.cloudfoundry.org/stager/backend"
)
const (
StagingStartRequestsReceivedCounter = metric.Counter("StagingStartRequestsReceived")
StagingStopRequestsReceivedCounter = metric.Counter("StagingStopRequestsReceived")
)
type StagingHandler interface {
Stage(resp http.ResponseWriter, req *http.Request)
StopStaging(resp http.ResponseWriter, req *http.Request)
}
type stagingHandler struct {
logger lager.Logger
backends map[string]backend.Backend
diegoClient bbs.Client
}
func NewStagingHandler(
logger lager.Logger,
backends map[string]backend.Backend,
bbsClient bbs.Client,
) StagingHandler {
logger = logger.Session("staging-handler")
return &stagingHandler{
logger: logger,
backends: backends,
diegoClient: bbsClient,
}
}
func (handler *stagingHandler) Stage(resp http.ResponseWriter, req *http.Request) {
stagingGuid := req.FormValue(":staging_guid")
logger := handler.logger.Session("staging-request", lager.Data{"staging-guid": stagingGuid})
requestBody, err := ioutil.ReadAll(req.Body)
if err != nil {
logger.Error("read-body-failed", err)
resp.WriteHeader(http.StatusInternalServerError)
return
}
var stagingRequest cc_messages.StagingRequestFromCC
err = json.Unmarshal(requestBody, &stagingRequest)
if err != nil {
logger.Error("unmarshal-request-failed", err)
resp.WriteHeader(http.StatusBadRequest)
return
}
envNames := []string{}
for _, envVar := range stagingRequest.Environment {
envNames = append(envNames, envVar.Name)
}
logger.Info("environment", lager.Data{"keys": envNames})
backend, ok := handler.backends[stagingRequest.Lifecycle]
if !ok {
logger.Error("backend-not-found", err, lager.Data{"backend": stagingRequest.Lifecycle})
resp.WriteHeader(http.StatusNotFound)
return
}
StagingStartRequestsReceivedCounter.Increment()
taskDef, guid, domain, err := backend.BuildRecipe(stagingGuid, stagingRequest)
if err != nil {
logger.Error("recipe-building-failed", err, lager.Data{"staging-request": stagingRequest})
handler.doErrorResponse(resp, err.Error())
return
}
logger.Info("desiring-task", lager.Data{
"task_guid": guid,
"callback_url": taskDef.CompletionCallbackUrl,
})
err = handler.diegoClient.DesireTask(logger, guid, domain, taskDef)
if models.ErrResourceExists.Equal(err) {
err = nil
}
if err != nil {
logger.Error("staging-failed", err, lager.Data{"staging-request": stagingRequest})
handler.doErrorResponse(resp, err.Error())
return
}
resp.WriteHeader(http.StatusAccepted)
}
func (handler *stagingHandler) doErrorResponse(resp http.ResponseWriter, message string) {
response := cc_messages.StagingResponseForCC{
Error: backend.SanitizeErrorMessage(message),
}
responseJson, _ := json.Marshal(response)
resp.WriteHeader(http.StatusInternalServerError)
resp.Write(responseJson)
}
func (handler *stagingHandler) StopStaging(resp http.ResponseWriter, req *http.Request) {
taskGuid := req.FormValue(":staging_guid")
logger := handler.logger.Session("stop-staging-request", lager.Data{"staging-guid": taskGuid})
task, err := handler.diegoClient.TaskByGuid(logger, taskGuid)
if err != nil {
if models.ErrResourceNotFound.Equal(err) {
resp.WriteHeader(http.StatusNotFound)
return
}
logger.Error("failed-to-get-task", err)
resp.WriteHeader(http.StatusInternalServerError)
return
}
var annotation cc_messages.StagingTaskAnnotation
err = json.Unmarshal([]byte(task.Annotation), &annotation)
if err != nil {
logger.Error("failed-to-unmarshal-task-annotation", err)
resp.WriteHeader(http.StatusInternalServerError)
return
}
resp.WriteHeader(http.StatusAccepted)
StagingStopRequestsReceivedCounter.Increment()
logger.Info("cancelling", lager.Data{"task_guid": taskGuid})
err = handler.diegoClient.CancelTask(logger, taskGuid)
if err != nil {
logger.Error("stop-staging-failed", err)
}
}