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package upload
import (
"bytes"
"context"
"fmt"
"io/ioutil"
"mime/multipart"
"net/http"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/api"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/filestore"
"gitlab.com/gitlab-org/gitlab-workhorse/internal/helper"
)
// These methods are allowed to have thread-unsafe implementations.
type MultipartFormProcessor interface {
ProcessFile(ctx context.Context, formName string, file *filestore.FileHandler, writer *multipart.Writer) error
ProcessField(ctx context.Context, formName string, writer *multipart.Writer) error
Finalize(ctx context.Context) error
Name() string
}
func HandleFileUploads(w http.ResponseWriter, r *http.Request, h http.Handler, preauth *api.Response, filter MultipartFormProcessor) {
opts := filestore.GetOpts(preauth)
if !opts.IsLocal() && !opts.IsRemote() {
helper.Fail500(w, r, fmt.Errorf("handleFileUploads: missing destination storage"))
return
}
var body bytes.Buffer
writer := multipart.NewWriter(&body)
defer writer.Close()
// Rewrite multipart form data
err := rewriteFormFilesFromMultipart(r, writer, preauth, filter)
if err != nil {
switch err {
case http.ErrNotMultipart:
h.ServeHTTP(w, r)
case filestore.ErrEntityTooLarge:
helper.RequestEntityTooLarge(w, r, err)
default:
helper.Fail500(w, r, fmt.Errorf("handleFileUploads: extract files from multipart: %v", err))
}
return
}
// Close writer
writer.Close()
// Hijack the request
r.Body = ioutil.NopCloser(&body)
r.ContentLength = int64(body.Len())
r.Header.Set("Content-Type", writer.FormDataContentType())
if err := filter.Finalize(r.Context()); err != nil {
helper.Fail500(w, r, fmt.Errorf("handleFileUploads: Finalize: %v", err))
return
}
// Proxy the request
h.ServeHTTP(w, r)
}
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