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remote_client.go
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remote_client.go
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package voltoolshttp
import (
"bytes"
"encoding/json"
"io"
"io/ioutil"
"net/http"
"strings"
"fmt"
"code.cloudfoundry.org/cfhttp"
"code.cloudfoundry.org/clock"
"code.cloudfoundry.org/lager"
"github.com/tedsuo/rata"
os_http "net/http"
"code.cloudfoundry.org/dockerdriver"
"code.cloudfoundry.org/dockerdriver/driverhttp"
"code.cloudfoundry.org/efsdriver/efsvoltools"
"code.cloudfoundry.org/goshims/http_wrap"
)
type reqFactory struct {
reqGen *rata.RequestGenerator
route string
payload []byte
}
func newReqFactory(reqGen *rata.RequestGenerator, route string, payload []byte) *reqFactory {
return &reqFactory{
reqGen: reqGen,
route: route,
payload: payload,
}
}
func (r *reqFactory) Request() (*os_http.Request, error) {
return r.reqGen.CreateRequest(r.route, nil, bytes.NewBuffer(r.payload))
}
type remoteClient struct {
HttpClient http_wrap.Client
reqGen *rata.RequestGenerator
clock clock.Clock
}
func NewRemoteClient(url string) (*remoteClient, error) {
client := cfhttp.NewClient()
if strings.Contains(url, ".sock") {
client = cfhttp.NewUnixClient(url)
url = fmt.Sprintf("unix://%s", url)
}
return NewRemoteClientWithClient(url, client, clock.NewClock()), nil
}
func NewRemoteClientWithClient(socketPath string, client http_wrap.Client, clock clock.Clock) *remoteClient {
return &remoteClient{
HttpClient: client,
reqGen: rata.NewRequestGenerator(socketPath, efsvoltools.Routes),
clock: clock,
}
}
func (r *remoteClient) OpenPerms(env dockerdriver.Env, request efsvoltools.OpenPermsRequest) efsvoltools.ErrorResponse {
logger := env.Logger().Session("open-perms", lager.Data{"request": request})
logger.Info("start")
defer logger.Info("end")
payload, err := json.Marshal(request)
if err != nil {
logger.Error("failed-marshalling-request", err)
return efsvoltools.ErrorResponse{Err: err.Error()}
}
httpRequest := newReqFactory(r.reqGen, efsvoltools.OpenPermsRoute, payload)
response, err := r.do(driverhttp.EnvWithLogger(logger, env), httpRequest)
if err != nil {
logger.Error("failed-creating-volume", err)
return efsvoltools.ErrorResponse{Err: err.Error()}
}
if response.StatusCode == http.StatusInternalServerError {
var remoteError efsvoltools.ErrorResponse
if err := unmarshallJSON(logger, response.Body, &remoteError); err != nil {
logger.Error("failed-parsing-error-response", err)
return efsvoltools.ErrorResponse{Err: err.Error()}
}
return remoteError
}
return efsvoltools.ErrorResponse{}
}
func unmarshallJSON(logger lager.Logger, reader io.ReadCloser, jsonResponse interface{}) error {
body, err := ioutil.ReadAll(reader)
if err != nil {
logger.Error("Error in Reading HTTP Response body from remote.", err)
}
err = json.Unmarshal(body, jsonResponse)
return err
}
func (r *remoteClient) clientError(logger lager.Logger, err error, msg string) string {
logger.Error(msg, err)
return err.Error()
}
func (r *remoteClient) do(env dockerdriver.Env, requestFactory *reqFactory) (*os_http.Response, error) {
var (
response *os_http.Response
err error
request *os_http.Request
)
logger := env.Logger().Session("do")
request, err = requestFactory.Request()
if err != nil {
logger.Error("request-gen-failed", err)
return nil, err
}
response, err = r.HttpClient.Do(request)
if err != nil {
logger.Error("request-failed", err)
return response, err
}
logger.Debug("response", lager.Data{"response": response.Status})
return response, nil
}