edge/pkg/module/blob/http.go

231 lines
5.7 KiB
Go

package blob
import (
"encoding/json"
"io"
"io/fs"
"mime/multipart"
"net/http"
"os"
"time"
"forge.cadoles.com/arcad/edge/pkg/bus"
edgehttp "forge.cadoles.com/arcad/edge/pkg/http"
"forge.cadoles.com/arcad/edge/pkg/storage"
"github.com/go-chi/chi/v5"
"github.com/pkg/errors"
"gitlab.com/wpetit/goweb/logger"
)
type uploadResponse struct {
Bucket string `json:"bucket"`
BlobID storage.BlobID `json:"blobId"`
}
func Mount(uploadMaxFileSize int64) func(r chi.Router) {
return func(r chi.Router) {
r.Post("/api/v1/upload", getAppUploadHandler(uploadMaxFileSize))
r.Get("/api/v1/download/{bucket}/{blobID}", handleAppDownload)
}
}
func getAppUploadHandler(uploadMaxFileSize int64) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
r.Body = http.MaxBytesReader(w, r.Body, uploadMaxFileSize)
if err := r.ParseMultipartForm(uploadMaxFileSize); err != nil {
logger.Error(ctx, "could not parse multipart form", logger.CapturedE(errors.WithStack(err)))
edgehttp.JSONError(w, http.StatusBadRequest, edgehttp.ErrCodeBadRequest)
return
}
_, fileHeader, err := r.FormFile("file")
if err != nil {
logger.Error(ctx, "could not read form file", logger.CapturedE(errors.WithStack(err)))
edgehttp.JSONError(w, http.StatusBadRequest, edgehttp.ErrCodeBadRequest)
return
}
var metadata map[string]any
rawMetadata := r.Form.Get("metadata")
if rawMetadata != "" {
if err := json.Unmarshal([]byte(rawMetadata), &metadata); err != nil {
logger.Error(ctx, "could not parse metadata", logger.CapturedE(errors.WithStack(err)))
edgehttp.JSONError(w, http.StatusBadRequest, edgehttp.ErrCodeBadRequest)
return
}
}
requestEnv := NewUploadRequestEnvelope(ctx, fileHeader, metadata)
bus, ok := edgehttp.ContextBus(ctx)
if !ok {
logger.Error(ctx, "could find bus on context")
edgehttp.JSONError(w, http.StatusInternalServerError, edgehttp.ErrCodeInternalError)
return
}
reply, err := bus.Request(ctx, requestEnv)
if err != nil {
logger.Error(ctx, "could not retrieve file", logger.CapturedE(errors.WithStack(err)))
edgehttp.JSONError(w, http.StatusInternalServerError, edgehttp.ErrCodeInternalError)
return
}
logger.Debug(ctx, "upload reply", logger.F("reply", reply))
replyMessage, ok := reply.Message().(*UploadResponse)
if !ok {
logger.Error(
ctx, "unexpected upload response message",
logger.F("message", reply.Message()),
)
edgehttp.JSONError(w, http.StatusInternalServerError, edgehttp.ErrCodeInternalError)
return
}
if !replyMessage.Allow {
edgehttp.JSONError(w, http.StatusForbidden, edgehttp.ErrCodeForbidden)
return
}
encoder := json.NewEncoder(w)
res := &uploadResponse{
Bucket: replyMessage.Bucket,
BlobID: replyMessage.BlobID,
}
if err := encoder.Encode(res); err != nil {
panic(errors.Wrap(err, "could not encode upload response"))
}
}
}
func handleAppDownload(w http.ResponseWriter, r *http.Request) {
bucket := chi.URLParam(r, "bucket")
blobID := chi.URLParam(r, "blobID")
ctx := logger.With(r.Context(), logger.F("blobID", blobID), logger.F("bucket", bucket))
requestMsg := NewDownloadRequestEnvelope(ctx, bucket, storage.BlobID(blobID))
bs, ok := edgehttp.ContextBus(ctx)
if !ok {
logger.Error(ctx, "could find bus on context")
edgehttp.JSONError(w, http.StatusInternalServerError, edgehttp.ErrCodeInternalError)
return
}
reply, err := bs.Request(ctx, requestMsg)
if err != nil {
logger.Error(ctx, "could not retrieve file", logger.CapturedE(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
replyMessage, ok := reply.Message().(*DownloadResponse)
if !ok {
logger.Error(
ctx, "unexpected download response message",
logger.CapturedE(errors.WithStack(bus.ErrUnexpectedMessage)),
logger.F("message", reply),
)
edgehttp.JSONError(w, http.StatusInternalServerError, edgehttp.ErrCodeInternalError)
return
}
if !replyMessage.Allow {
edgehttp.JSONError(w, http.StatusForbidden, edgehttp.ErrCodeForbidden)
return
}
if replyMessage.Blob == nil {
edgehttp.JSONError(w, http.StatusNotFound, edgehttp.ErrCodeNotFound)
return
}
defer func() {
if err := replyMessage.Blob.Close(); err != nil {
logger.Error(ctx, "could not close blob", logger.CapturedE(errors.WithStack(err)))
}
}()
// TODO Fix usage of ServeContent
// http.ServeContent(w, r, string(replyMessage.BlobInfo.ID()), replyMessage.BlobInfo.ModTime(), replyMessage.Blob)
w.Header().Add("Content-Type", replyMessage.BlobInfo.ContentType())
if _, err := io.Copy(w, replyMessage.Blob); err != nil {
logger.Error(ctx, "could not write blob", logger.CapturedE(errors.WithStack(err)))
}
}
type uploadedFile struct {
multipart.File
header *multipart.FileHeader
modTime time.Time
}
// Stat implements fs.File
func (f *uploadedFile) Stat() (fs.FileInfo, error) {
return &uploadedFileInfo{
header: f.header,
modTime: f.modTime,
}, nil
}
type uploadedFileInfo struct {
header *multipart.FileHeader
modTime time.Time
}
// IsDir implements fs.FileInfo
func (i *uploadedFileInfo) IsDir() bool {
return false
}
// ModTime implements fs.FileInfo
func (i *uploadedFileInfo) ModTime() time.Time {
return i.modTime
}
// Mode implements fs.FileInfo
func (i *uploadedFileInfo) Mode() fs.FileMode {
return os.ModePerm
}
// Name implements fs.FileInfo
func (i *uploadedFileInfo) Name() string {
return i.header.Filename
}
// Size implements fs.FileInfo
func (i *uploadedFileInfo) Size() int64 {
return i.header.Size
}
// Sys implements fs.FileInfo
func (i *uploadedFileInfo) Sys() any {
return nil
}
var (
_ fs.File = &uploadedFile{}
_ fs.FileInfo = &uploadedFileInfo{}
)