[bugfix] Close ReadClosers properly in the media package (#434)

* defer lock reader

* close readers when finished with them

* close the reader in the teereader when finished
This commit is contained in:
tobi 2022-03-21 13:41:44 +01:00 committed by GitHub
parent 55ad6dee71
commit 73e9cca701
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 52 additions and 18 deletions

View file

@ -29,6 +29,7 @@ import (
"time"
"codeberg.org/gruf/go-store/kv"
"github.com/sirupsen/logrus"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/uris"
@ -169,6 +170,15 @@ func (p *ProcessingEmoji) store(ctx context.Context) error {
return fmt.Errorf("store: error executing data function: %s", err)
}
// defer closing the reader when we're done with it
defer func() {
if rc, ok := reader.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
logrus.Errorf("store: error closing readcloser: %s", err)
}
}
}()
// extract no more than 261 bytes from the beginning of the file -- this is the header
firstBytes := make([]byte, maxFileHeaderBytes)
if _, err := reader.Read(firstBytes); err != nil {
@ -205,13 +215,6 @@ func (p *ProcessingEmoji) store(ctx context.Context) error {
return fmt.Errorf("store: error storing stream: %s", err)
}
// if the original reader is a readcloser, close it since we're done with it now
if rc, ok := reader.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
return fmt.Errorf("store: error closing readcloser: %s", err)
}
}
p.read = true
if p.postData != nil {

View file

@ -29,6 +29,7 @@ import (
"time"
"codeberg.org/gruf/go-store/kv"
"github.com/sirupsen/logrus"
terminator "github.com/superseriousbusiness/exif-terminator"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@ -260,6 +261,15 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
return fmt.Errorf("store: error executing data function: %s", err)
}
// defer closing the reader when we're done with it
defer func() {
if rc, ok := reader.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
logrus.Errorf("store: error closing readcloser: %s", err)
}
}
}()
// extract no more than 261 bytes from the beginning of the file -- this is the header
firstBytes := make([]byte, maxFileHeaderBytes)
if _, err := reader.Read(firstBytes); err != nil {
@ -305,6 +315,15 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
return fmt.Errorf("store: couldn't process %s", extension)
}
// defer closing the clean reader when we're done with it
defer func() {
if rc, ok := clean.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
logrus.Errorf("store: error closing clean readcloser: %s", err)
}
}
}()
// now set some additional fields on the attachment since
// we know more about what the underlying media actually is
p.attachment.URL = uris.GenerateURIForAttachment(p.attachment.AccountID, string(TypeAttachment), string(SizeOriginal), p.attachment.ID, extension)
@ -317,14 +336,6 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
return fmt.Errorf("store: error storing stream: %s", err)
}
p.attachment.Cached = true
// if the original reader is a readcloser, close it since we're done with it now
if rc, ok := reader.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
return fmt.Errorf("store: error closing readcloser: %s", err)
}
}
p.read = true
if p.postData != nil {

View file

@ -180,9 +180,15 @@ func (p *processor) getAttachmentContent(ctx context.Context, requestingAccount
return nil, 0, err
}
// everything read from the readCloser by the media manager will be written into the bufferedWriter
teeReader := io.TeeReader(readCloser, bufferedWriter)
return teeReader, fileSize, nil
// Make a TeeReader so that everything read from the readCloser by the media manager will be written into the bufferedWriter.
// We wrap this in a teeReadCloser which implements io.ReadCloser, so that whoever uses the teeReader can close the readCloser
// when they're done with it.
trc := teeReadCloser{
teeReader: io.TeeReader(readCloser, bufferedWriter),
close: readCloser.Close,
}
return trc, fileSize, nil
}
// close the pipewriter after data has been piped into it, so the reader on the other side doesn't block;

View file

@ -20,6 +20,7 @@ package media
import (
"fmt"
"io"
"strconv"
"strings"
)
@ -61,3 +62,16 @@ func parseFocus(focus string) (focusx, focusy float32, err error) {
focusy = float32(fy)
return
}
type teeReadCloser struct {
teeReader io.Reader
close func() error
}
func (t teeReadCloser) Read(p []byte) (n int, err error) {
return t.teeReader.Read(p)
}
func (t teeReadCloser) Close() error {
return t.close()
}