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handlers.go
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handlers.go
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package driveradminhttp
import (
"encoding/json"
"errors"
"net/http"
"strconv"
"code.cloudfoundry.org/dockerdriver/driverhttp"
"code.cloudfoundry.org/lager/v3"
"code.cloudfoundry.org/smbdriver/driveradmin"
"github.com/tedsuo/rata"
)
func NewHandler(logger lager.Logger, client driveradmin.DriverAdmin) (http.Handler, error) {
logger = logger.Session("server")
logger.Info("start")
defer logger.Info("end")
var handlers = rata.Handlers{
driveradmin.EvacuateRoute: newEvacuateHandler(logger, client),
driveradmin.PingRoute: newPingHandler(logger, client),
}
return rata.NewRouter(driveradmin.Routes, handlers)
}
func newEvacuateHandler(logger lager.Logger, client driveradmin.DriverAdmin) http.HandlerFunc {
return func(w http.ResponseWriter, req *http.Request) {
logger := logger.Session("handle-evacuate")
logger.Info("start")
defer logger.Info("end")
env := driverhttp.EnvWithMonitor(logger, req.Context(), w)
response := client.Evacuate(env)
if response.Err != "" {
logger.Error("failed-evacuating", errors.New(response.Err))
WriteJSONResponse(w, http.StatusInternalServerError, response)
return
}
WriteJSONResponse(w, http.StatusOK, response)
}
}
func newPingHandler(logger lager.Logger, client driveradmin.DriverAdmin) http.HandlerFunc {
return func(w http.ResponseWriter, req *http.Request) {
logger := logger.Session("handle-ping")
logger.Info("start")
defer logger.Info("end")
env := driverhttp.EnvWithMonitor(logger, req.Context(), w)
response := client.Ping(env)
if response.Err != "" {
logger.Error("failed-pinging", errors.New(response.Err))
WriteJSONResponse(w, http.StatusInternalServerError, response)
return
}
WriteJSONResponse(w, http.StatusOK, response)
}
}
func WriteJSONResponse(w http.ResponseWriter, statusCode int, jsonObj any) {
jsonBytes, err := json.Marshal(jsonObj)
if err != nil {
panic("Unable to encode JSON: " + err.Error())
}
w.Header().Set("Content-Length", strconv.Itoa(len(jsonBytes)))
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(statusCode)
if _, err := w.Write(jsonBytes); err != nil {
panic("Unable to write data: " + err.Error())
}
}