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file.go
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file.go
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// Copyright (C) 2019 Nicola Murino
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package httpd
import (
"io"
"github.com/drakkan/sftpgo/v2/internal/common"
"github.com/drakkan/sftpgo/v2/internal/vfs"
)
type httpdFile struct {
*common.BaseTransfer
writer io.WriteCloser
reader io.ReadCloser
isFinished bool
}
func newHTTPDFile(baseTransfer *common.BaseTransfer, pipeWriter vfs.PipeWriter, pipeReader vfs.PipeReader) *httpdFile {
var writer io.WriteCloser
var reader io.ReadCloser
if baseTransfer.File != nil {
writer = baseTransfer.File
reader = baseTransfer.File
} else if pipeWriter != nil {
writer = pipeWriter
} else if pipeReader != nil {
reader = pipeReader
}
return &httpdFile{
BaseTransfer: baseTransfer,
writer: writer,
reader: reader,
isFinished: false,
}
}
// Read reads the contents to downloads.
func (f *httpdFile) Read(p []byte) (n int, err error) {
if f.AbortTransfer.Load() {
err := f.GetAbortError()
f.TransferError(err)
return 0, err
}
f.Connection.UpdateLastActivity()
n, err = f.reader.Read(p)
f.BytesSent.Add(int64(n))
if err == nil {
err = f.CheckRead()
}
if err != nil && err != io.EOF {
f.TransferError(err)
err = f.ConvertError(err)
return
}
f.HandleThrottle()
return
}
// Write writes the contents to upload
func (f *httpdFile) Write(p []byte) (n int, err error) {
if f.AbortTransfer.Load() {
err := f.GetAbortError()
f.TransferError(err)
return 0, err
}
f.Connection.UpdateLastActivity()
n, err = f.writer.Write(p)
f.BytesReceived.Add(int64(n))
if err == nil {
err = f.CheckWrite()
}
if err != nil {
f.TransferError(err)
err = f.ConvertError(err)
return
}
f.HandleThrottle()
return
}
// Close closes the current transfer
func (f *httpdFile) Close() error {
if err := f.setFinished(); err != nil {
return err
}
err := f.closeIO()
errBaseClose := f.BaseTransfer.Close()
if errBaseClose != nil {
err = errBaseClose
}
return f.Connection.GetFsError(f.Fs, err)
}
func (f *httpdFile) closeIO() error {
var err error
if f.File != nil {
err = f.File.Close()
} else if f.writer != nil {
err = f.writer.Close()
f.Lock()
// we set ErrTransfer here so quota is not updated, in this case the uploads are atomic
if err != nil && f.ErrTransfer == nil {
f.ErrTransfer = err
}
f.Unlock()
} else if f.reader != nil {
err = f.reader.Close()
if metadater, ok := f.reader.(vfs.Metadater); ok {
f.BaseTransfer.SetMetadata(metadater.Metadata())
}
}
return err
}
func (f *httpdFile) setFinished() error {
f.Lock()
defer f.Unlock()
if f.isFinished {
return common.ErrTransferClosed
}
f.isFinished = true
return nil
}