/
upload_chunk.go
196 lines (157 loc) · 4.94 KB
/
upload_chunk.go
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package crud
import (
"context"
"errors"
"fmt"
"io"
"io/fs"
"log/slog"
"net/http"
"os"
"path/filepath"
absto "github.com/ViBiOh/absto/pkg/model"
"github.com/ViBiOh/fibr/pkg/provider"
"github.com/ViBiOh/httputils/v4/pkg/cntxt"
"github.com/ViBiOh/httputils/v4/pkg/model"
"github.com/ViBiOh/httputils/v4/pkg/telemetry"
)
func (s Service) uploadChunk(w http.ResponseWriter, r *http.Request, request provider.Request, fileName, chunkNumber string, file io.Reader) {
if file == nil {
s.error(w, r, request, model.WrapInvalid(errors.New("no file provided for save")))
return
}
fileName, err := safeFilename(fileName)
if err != nil {
s.error(w, r, request, model.WrapInvalid(err))
return
}
tempDestination := filepath.Join(s.temporaryFolder, provider.Hash(fileName))
tempFile := filepath.Join(tempDestination, chunkNumber)
if err = os.MkdirAll(tempDestination, absto.DirectoryPerm); err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
var writer *os.File
writer, err = os.OpenFile(tempFile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, absto.RegularFilePerm)
if err != nil {
return
}
defer func() {
if closeErr := writer.Close(); closeErr != nil {
slog.ErrorContext(r.Context(), "close chunk writer", "error", closeErr)
}
if err == nil {
return
}
if removeErr := os.Remove(tempFile); removeErr != nil {
slog.ErrorContext(r.Context(), "remove chunk file", "error", removeErr, "file", tempFile)
}
}()
if _, err = io.Copy(writer, file); err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
w.WriteHeader(http.StatusAccepted)
}
func (s Service) mergeChunk(w http.ResponseWriter, r *http.Request, request provider.Request, values map[string]string) {
ctx, end := telemetry.StartSpan(r.Context(), s.tracer, "merge_chunk")
defer end(nil)
fileName, err := safeFilename(values["filename"])
if err != nil {
s.error(w, r, request, model.WrapInvalid(err))
return
}
tempFolder := filepath.Join(s.temporaryFolder, provider.Hash(fileName))
tempFile := filepath.Join(tempFolder, fileName)
if err := s.mergeChunkFiles(ctx, tempFolder, tempFile); err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
var size int64
size, err = getUploadSize(values["size"])
if err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
file, err := os.Open(tempFile)
if err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
fileName, err = provider.SanitizeName(fileName, true)
if err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
filePath := request.SubPath(fileName)
err = provider.WriteToStorage(ctx, s.storage, filePath, size, file)
if err != nil {
s.error(w, r, request, model.WrapInternal(err))
return
}
go func(ctx context.Context) {
if info, infoErr := s.storage.Stat(ctx, filePath); infoErr != nil {
slog.ErrorContext(ctx, "get info for upload event", "error", infoErr)
} else {
s.pushEvent(ctx, provider.NewUploadEvent(ctx, request, info, s.bestSharePath(filePath), s.renderer))
}
}(cntxt.WithoutDeadline(ctx))
if err = os.RemoveAll(tempFolder); err != nil {
slog.ErrorContext(ctx, "delete chunk folder", "error", err, "folder", tempFolder)
}
s.postUpload(w, r, request, fileName)
}
func (s Service) mergeChunkFiles(ctx context.Context, directory, destination string) error {
writer, err := os.OpenFile(destination, os.O_RDWR|os.O_CREATE|os.O_TRUNC, absto.RegularFilePerm)
if err != nil {
return fmt.Errorf("open destination file `%s`: %w", destination, err)
}
defer func() {
if closeErr := writer.Close(); closeErr != nil {
slog.ErrorContext(ctx, "close chunk's destination", "error", closeErr)
}
if err == nil {
return
}
if removeErr := os.Remove(destination); removeErr != nil {
slog.ErrorContext(ctx, "remove chunk's destination", "error", removeErr, "destination", destination)
}
}()
if err = browseChunkFiles(ctx, directory, destination, writer); err != nil {
return fmt.Errorf("walk chunks in `%s`: %w", directory, err)
}
return nil
}
func browseChunkFiles(ctx context.Context, directory, destination string, writer io.Writer) error {
return filepath.WalkDir(directory, func(path string, info fs.DirEntry, err error) error {
if err != nil {
return err
}
if info.IsDir() || path == destination {
return nil
}
reader, err := os.Open(path)
if err != nil {
return fmt.Errorf("open chunk `%s`: %w", path, err)
}
defer func() {
if closeErr := reader.Close(); closeErr != nil {
slog.ErrorContext(ctx, "close chunk", "error", err, "path", path)
}
}()
if _, err = io.Copy(writer, reader); err != nil {
return fmt.Errorf("copy chunk `%s`: %w", path, err)
}
return nil
})
}
func safeFilename(fileName string) (string, error) {
if err := absto.ValidPath(fileName); err != nil {
return fileName, err
}
output, err := provider.SanitizeName(fileName, true)
if err != nil {
return fileName, fmt.Errorf("sanitize: %w", err)
}
return output, nil
}