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transport_http.go
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transport_http.go
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package apply
import (
"bytes"
"context"
"encoding/json"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
httptransport "github.com/go-kit/kit/transport/http"
"github.com/pkg/errors"
)
type HTTPHandlers struct {
DEPTokensHandler http.Handler
DefineDEPProfileHandler http.Handler
AppUploadHandler http.Handler
}
func MakeHTTPHandlers(ctx context.Context, endpoints Endpoints, opts ...httptransport.ServerOption) HTTPHandlers {
h := HTTPHandlers{
DEPTokensHandler: httptransport.NewServer(
endpoints.ApplyDEPTokensEndpoint,
decodeDEPTokensRequest,
encodeResponse,
opts...,
),
DefineDEPProfileHandler: httptransport.NewServer(
endpoints.DefineDEPProfileEndpoint,
decodeDEPProfileRequest,
encodeResponse,
opts...,
),
AppUploadHandler: httptransport.NewServer(
endpoints.AppUploadEndpoint,
decodeAppUploadRequest,
encodeResponse,
opts...,
),
}
return h
}
func decodeDEPTokensRequest(ctx context.Context, r *http.Request) (interface{}, error) {
var req depTokensRequest
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
return nil, err
}
return req, nil
}
func decodeDEPProfileRequest(ctx context.Context, r *http.Request) (interface{}, error) {
var req depProfileRequest
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
return nil, err
}
return req, nil
}
func decodeAppUploadRequest(ctx context.Context, r *http.Request) (interface{}, error) {
defer r.Body.Close()
appManifestFilename := r.FormValue("app_manifest_filename")
manifestFile, _, err := r.FormFile("app_manifest_filedata")
if err != nil && err != http.ErrMissingFile {
return nil, errors.Wrap(err, "manifest file")
}
pkgFilename := r.FormValue("pkg_name")
pkgFile, _, err := r.FormFile("pkg_filedata")
if err != nil && err != http.ErrMissingFile {
return nil, err
}
return appUploadRequest{
ManifestName: appManifestFilename,
ManifestFile: manifestFile,
PKGFilename: pkgFilename,
PKGFile: pkgFile,
}, nil
}
func EncodeUploadAppRequest(_ context.Context, r *http.Request, request interface{}) error {
req := request.(appUploadRequest)
body := new(bytes.Buffer)
writer := multipart.NewWriter(body)
if req.ManifestName != "" {
partManifest, err := writer.CreateFormFile("app_manifest_filedata", req.ManifestName)
if err != nil {
return err
}
_, err = io.Copy(partManifest, req.ManifestFile)
if err != nil {
return errors.Wrap(err, "copying appmanifest file to multipart writer")
}
writer.WriteField("app_manifest_filename", req.ManifestName)
}
if req.PKGFilename != "" {
partPkg, err := writer.CreateFormFile("pkg_filedata", req.PKGFilename)
if err != nil {
return err
}
_, err = io.Copy(partPkg, req.PKGFile)
if err != nil {
return errors.Wrap(err, "copying pkg file to multipart writer")
}
writer.WriteField("pkg_name", req.PKGFilename)
}
if err := writer.Close(); err != nil {
return errors.Wrap(err, "closing multipart writer")
}
r.Header.Set("Content-Type", writer.FormDataContentType())
r.Body = ioutil.NopCloser(body)
return nil
}
type errorWrapper struct {
Error string `json:"error"`
}
type errorer interface {
error() error
}
func errorDecoder(r *http.Response) error {
var w errorWrapper
if err := json.NewDecoder(r.Body).Decode(&w); err != nil {
return err
}
return errors.New(w.Error)
}
func encodeResponse(ctx context.Context, w http.ResponseWriter, response interface{}) error {
if e, ok := response.(errorer); ok && e.error() != nil {
EncodeError(ctx, e.error(), w)
return nil
}
enc := json.NewEncoder(w)
enc.SetIndent("", " ")
return enc.Encode(response)
}
func EncodeError(ctx context.Context, err error, w http.ResponseWriter) {
w.WriteHeader(http.StatusInternalServerError)
enc := json.NewEncoder(w)
enc.SetIndent("", " ")
enc.Encode(errorWrapper{Error: err.Error()})
}
// EncodeHTTPGenericRequest is a transport/http.EncodeRequestFunc that
// JSON-encodes any request to the request body. Primarily useful in a client.
func EncodeHTTPGenericRequest(_ context.Context, r *http.Request, request interface{}) error {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(request); err != nil {
return err
}
r.Body = ioutil.NopCloser(&buf)
return nil
}
func DecodeDEPTokensResponse(_ context.Context, r *http.Response) (interface{}, error) {
if r.StatusCode != http.StatusOK {
return nil, errorDecoder(r)
}
var resp depTokensResponse
err := json.NewDecoder(r.Body).Decode(&resp)
return resp, err
}
func DecodeDEPProfileResponse(_ context.Context, r *http.Response) (interface{}, error) {
if r.StatusCode != http.StatusOK {
return nil, errorDecoder(r)
}
var resp depProfileResponse
err := json.NewDecoder(r.Body).Decode(&resp)
return resp, err
}
func DecodeUploadAppResponse(_ context.Context, r *http.Response) (interface{}, error) {
if r.StatusCode != http.StatusOK {
return nil, errorDecoder(r)
}
var resp appUploadResponse
err := json.NewDecoder(r.Body).Decode(&resp)
return resp, err
}