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metadatahandler.go
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/
metadatahandler.go
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package externalapi
import (
"bytes"
"encoding/json"
"io"
"io/ioutil"
"net/http"
"github.com/gorilla/mux"
"github.com/kyma-project/kyma/components/application-registry/internal/apperrors"
"github.com/kyma-project/kyma/components/application-registry/internal/httpconsts"
"github.com/kyma-project/kyma/components/application-registry/internal/httperrors"
"github.com/kyma-project/kyma/components/application-registry/internal/httptools"
"github.com/kyma-project/kyma/components/application-registry/internal/metadata"
"github.com/kyma-project/kyma/components/application-registry/internal/metadata/model"
)
type metadataHandler struct {
validator ServiceDetailsValidator
ServiceDefinitionService metadata.ServiceDefinitionService
detailedErrorResponse bool
}
func NewMetadataHandler(validator ServiceDetailsValidator, serviceDefinitionService metadata.ServiceDefinitionService, detailedErrorResponse bool) MetadataHandler {
return &metadataHandler{
validator: validator,
ServiceDefinitionService: serviceDefinitionService,
detailedErrorResponse: detailedErrorResponse,
}
}
func (mh *metadataHandler) CreateService(w http.ResponseWriter, r *http.Request) {
contextLogger := httptools.ContextLogger(r)
httptools.DumpRequestToLog(r, contextLogger)
serviceDefinition, apperr := mh.prepareServiceDefinition(r.Body)
if apperr != nil {
contextLogger.Errorf("Creating new service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
serviceId, apperr := mh.ServiceDefinitionService.Create(mux.Vars(r)["application"], &serviceDefinition)
if apperr != nil {
contextLogger.Errorf("Creating new service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
responseBody := CreateServiceResponse{ID: serviceId}
apperr = mh.respondWithBody(w, http.StatusOK, responseBody)
if apperr != nil {
contextLogger.Errorf("Creating service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
contextLogger.Infof("Service with ID %s created successfully.", serviceId)
}
func (mh *metadataHandler) GetService(w http.ResponseWriter, r *http.Request) {
contextLogger := httptools.ContextLoggerWithId(r)
httptools.DumpRequestToLog(r, contextLogger)
service, apperr := mh.ServiceDefinitionService.GetByID(mux.Vars(r)["application"], mux.Vars(r)["serviceId"])
if apperr != nil {
contextLogger.Errorf("Getting service by ID failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
responseBody, apperr := serviceDefinitionToServiceDetails(service)
if apperr != nil {
contextLogger.Errorf("Getting service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
apperr = mh.respondWithBody(w, http.StatusOK, responseBody)
if apperr != nil {
contextLogger.Errorf("Getting service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
contextLogger.Info("Service read successfully.")
}
func (mh *metadataHandler) GetServices(w http.ResponseWriter, r *http.Request) {
contextLogger := httptools.ContextLogger(r)
httptools.DumpRequestToLog(r, contextLogger)
services, apperr := mh.ServiceDefinitionService.GetAll(mux.Vars(r)["application"])
if apperr != nil {
contextLogger.Errorf("Getting all services failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
responseBody := make([]Service, 0)
for _, element := range services {
responseBody = append(responseBody, serviceDefinitionToService(element))
}
apperr = mh.respondWithBody(w, http.StatusOK, responseBody)
if apperr != nil {
contextLogger.Errorf("Getting all services failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
contextLogger.Info("Services read successfully.")
}
func (mh *metadataHandler) UpdateService(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
contextLogger := httptools.ContextLoggerWithId(r)
httptools.DumpRequestToLog(r, contextLogger)
serviceDefinition, apperr := mh.prepareServiceDefinition(r.Body)
if apperr != nil {
contextLogger.Errorf("Updating service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
serviceDefinition.ID = vars["serviceId"]
svc, apperr := mh.ServiceDefinitionService.Update(vars["application"], &serviceDefinition)
if apperr != nil {
contextLogger.Errorf("Updating service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
responseBody, apperr := serviceDefinitionToServiceDetails(svc)
if apperr != nil {
contextLogger.Errorf("Updating service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
apperr = mh.respondWithBody(w, http.StatusOK, responseBody)
if apperr != nil {
contextLogger.Errorf("Updating service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
contextLogger.Info("Service updated successfully.")
}
func (mh *metadataHandler) DeleteService(w http.ResponseWriter, r *http.Request) {
contextLogger := httptools.ContextLoggerWithId(r)
httptools.DumpRequestToLog(r, contextLogger)
vars := mux.Vars(r)
apperr := mh.ServiceDefinitionService.Delete(vars["application"], vars["serviceId"])
if apperr != nil {
contextLogger.Errorf("Deleting service failed, %s", apperr.Error())
mh.handleErrors(w, apperr)
return
}
respond(w, http.StatusNoContent)
contextLogger.Infof("Service deleted successfully.")
}
func (mh *metadataHandler) prepareServiceDefinition(body io.ReadCloser) (model.ServiceDefinition, apperrors.AppError) {
b, err := ioutil.ReadAll(body)
if err != nil {
return model.ServiceDefinition{}, apperrors.WrongInput("Failed to read request body, %s", err.Error())
}
defer body.Close()
var serviceDetails ServiceDetails
err = json.Unmarshal(b, &serviceDetails)
if err != nil {
return model.ServiceDefinition{}, apperrors.WrongInput("Failed to unmarshal request body, %s", err.Error())
}
appErr := mh.validator.Validate(serviceDetails)
if appErr != nil {
return model.ServiceDefinition{}, apperrors.WrongInput("Failed to validate request body, %s", appErr.Error())
}
return serviceDetailsToServiceDefinition(serviceDetails)
}
func (mh *metadataHandler) handleErrors(w http.ResponseWriter, apperr apperrors.AppError) {
statusCode, responseBody := httperrors.AppErrorToResponse(apperr, mh.detailedErrorResponse)
respond(w, statusCode)
json.NewEncoder(w).Encode(responseBody)
}
func respond(w http.ResponseWriter, statusCode int) {
w.Header().Set(httpconsts.HeaderContentType, httpconsts.ContentTypeApplicationJson)
w.WriteHeader(statusCode)
}
func (mh *metadataHandler) respondWithBody(w http.ResponseWriter, statusCode int, responseBody interface{}) apperrors.AppError {
var b bytes.Buffer
err := json.NewEncoder(&b).Encode(responseBody)
if err != nil {
return apperrors.Internal("Failed to marshall body, %s", err.Error())
}
respond(w, statusCode)
w.Write(b.Bytes())
return nil
}
func compact(src []byte) []byte {
buffer := new(bytes.Buffer)
err := json.Compact(buffer, src)
if err != nil {
return src
}
return buffer.Bytes()
}