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[bugfix] Wrap media in read closer (#941)

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* use readcloser for content.Content

* call media postdata function no matter what

* return a readcloser from data func

* tidy of logic of readertostore

* fix whoopsie
This commit is contained in:
tobi 2022-11-03 15:03:12 +01:00 • committed by GitHub
commit 1dfa7fe0d5
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15 changed files with 88 additions and 92 deletions
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7
internal/api/client/fileserver/servefile.go
View file

@ -20,7 +20,6 @@ package fileserver
import (
"fmt"
"io"
"net/http"
"strconv"
@ -86,14 +85,12 @@ func (m *FileServer) ServeFile(c *gin.Context) {
}
defer func() {
// if the content is a ReadCloser (ie., it's streamed from storage), close it when we're done
// close content when we're done
if content.Content != nil {
if closer, ok := content.Content.(io.ReadCloser); ok {
if err := closer.Close(); err != nil {
if err := content.Content.Close(); err != nil {
log.Errorf("ServeFile: error closing readcloser: %s", err)
}
}
}
}()
if content.URL != nil {

2
internal/api/model/content.go
View file

@ -30,7 +30,7 @@ type Content struct {
// ContentLength in bytes
ContentLength int64
// Actual content
Content io.Reader
Content io.ReadCloser
// Resource URL to forward to if the file can be fetched from the storage directly (e.g signed S3 URL)
URL *url.URL
}

4
internal/federation/dereferencing/account.go
View file

@ -496,7 +496,7 @@ func (d *deref) fetchRemoteAccountMedia(ctx context.Context, targetAccount *gtsm
}
}
data := func(innerCtx context.Context) (io.Reader, int64, error) {
data := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
return t.DereferenceMedia(innerCtx, avatarIRI)
}
@ -562,7 +562,7 @@ func (d *deref) fetchRemoteAccountMedia(ctx context.Context, targetAccount *gtsm
}
}
data := func(innerCtx context.Context) (io.Reader, int64, error) {
data := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
return t.DereferenceMedia(innerCtx, headerIRI)
}

2
internal/federation/dereferencing/emoji.go
View file

@ -42,7 +42,7 @@ func (d *deref) GetRemoteEmoji(ctx context.Context, requestingUsername string, r
return nil, fmt.Errorf("GetRemoteEmoji: error parsing url: %s", err)
}
dataFunc := func(innerCtx context.Context) (io.Reader, int64, error) {
dataFunc := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
return t.DereferenceMedia(innerCtx, derefURI)
}

2
internal/federation/dereferencing/media.go
View file

@ -42,7 +42,7 @@ func (d *deref) GetRemoteMedia(ctx context.Context, requestingUsername string, a
return nil, fmt.Errorf("GetRemoteMedia: error parsing url: %s", err)
}
dataFunc := func(innerCtx context.Context) (io.Reader, int64, error) {
dataFunc := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
return t.DereferenceMedia(innerCtx, derefURI)
}

54
internal/media/manager_test.go
View file

@ -43,13 +43,13 @@ type ManagerTestSuite struct {
func (suite *ManagerTestSuite) TestEmojiProcessBlocking() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/rainbow-original.png")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
emojiID := "01GDQ9G782X42BAMFASKP64343"
@ -114,12 +114,12 @@ func (suite *ManagerTestSuite) TestEmojiProcessBlockingRefresh() {
oldEmojiImagePath := emojiToUpdate.ImagePath
oldEmojiImageStaticPath := emojiToUpdate.ImageStaticPath
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
b, err := os.ReadFile("./test/gts_pixellated-original.png")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
emojiID := emojiToUpdate.ID
@ -197,13 +197,13 @@ func (suite *ManagerTestSuite) TestEmojiProcessBlockingRefresh() {
func (suite *ManagerTestSuite) TestEmojiProcessBlockingTooLarge() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/big-panda.gif")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
emojiID := "01GDQ9G782X42BAMFASKP64343"
@ -221,13 +221,13 @@ func (suite *ManagerTestSuite) TestEmojiProcessBlockingTooLarge() {
func (suite *ManagerTestSuite) TestEmojiProcessBlockingTooLargeNoSizeGiven() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/big-panda.gif")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
emojiID := "01GDQ9G782X42BAMFASKP64343"
@ -245,13 +245,13 @@ func (suite *ManagerTestSuite) TestEmojiProcessBlockingTooLargeNoSizeGiven() {
func (suite *ManagerTestSuite) TestEmojiProcessBlockingNoFileSizeGiven() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/rainbow-original.png")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), -1, nil
return io.NopCloser(bytes.NewBuffer(b)), -1, nil
}
emojiID := "01GDQ9G782X42BAMFASKP64343"
@ -307,13 +307,13 @@ func (suite *ManagerTestSuite) TestEmojiProcessBlockingNoFileSizeGiven() {
func (suite *ManagerTestSuite) TestSimpleJpegProcessBlocking() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-jpeg.jpg")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -379,14 +379,14 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessBlocking() {
func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingNoContentLengthGiven() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-jpeg.jpg")
if err != nil {
panic(err)
}
// give length as -1 to indicate unknown
return bytes.NewBuffer(b), -1, nil
return io.NopCloser(bytes.NewBuffer(b)), -1, nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -452,7 +452,7 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingNoContentLengthGiven
func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingReadCloser() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// open test image as a file
f, err := os.Open("./test/test-jpeg.jpg")
if err != nil {
@ -525,13 +525,13 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingReadCloser() {
func (suite *ManagerTestSuite) TestPngNoAlphaChannelProcessBlocking() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-png-noalphachannel.png")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -597,13 +597,13 @@ func (suite *ManagerTestSuite) TestPngNoAlphaChannelProcessBlocking() {
func (suite *ManagerTestSuite) TestPngAlphaChannelProcessBlocking() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-png-alphachannel.png")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -669,13 +669,13 @@ func (suite *ManagerTestSuite) TestPngAlphaChannelProcessBlocking() {
func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingWithCallback() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-jpeg.jpg")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
// test the callback function by setting a simple boolean
@ -752,13 +752,13 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingWithCallback() {
func (suite *ManagerTestSuite) TestSimpleJpegProcessAsync() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-jpeg.jpg")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -837,9 +837,9 @@ func (suite *ManagerTestSuite) TestSimpleJpegQueueSpamming() {
panic(err)
}
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
return bytes.NewReader(b), int64(len(b)), nil
return io.NopCloser(bytes.NewReader(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"
@ -913,13 +913,13 @@ func (suite *ManagerTestSuite) TestSimpleJpegQueueSpamming() {
func (suite *ManagerTestSuite) TestSimpleJpegProcessBlockingWithDiskStorage() {
ctx := context.Background()
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("./test/test-jpeg.jpg")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
accountID := "01FS1X72SK9ZPW0J1QQ68BD264"

10
internal/media/processingemoji.go
View file

@ -193,24 +193,22 @@ func (p *ProcessingEmoji) store(ctx context.Context) error {
return nil
}
// execute the data function to get the reader out of it
reader, fileSize, err := p.data(ctx)
// execute the data function to get the readcloser out of it
rc, fileSize, err := p.data(ctx)
if err != nil {
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 {
log.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 {
if _, err := rc.Read(firstBytes); err != nil {
return fmt.Errorf("store: error reading initial %d bytes: %s", maxFileHeaderBytes, err)
}
@ -242,7 +240,7 @@ func (p *ProcessingEmoji) store(ctx context.Context) error {
p.emoji.ImageContentType = contentType
// concatenate the first bytes with the existing bytes still in the reader (thanks Mara)
readerToStore := io.MultiReader(bytes.NewBuffer(firstBytes), reader)
readerToStore := io.MultiReader(bytes.NewBuffer(firstBytes), rc)
var maxEmojiSize int64
if p.emoji.Domain == "" {

36
internal/media/processingmedia.go
View file

@ -263,24 +263,31 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
return nil
}
// execute the data function to get the reader out of it
reader, fileSize, err := p.data(ctx)
// execute the data function to get the readcloser out of it
rc, fileSize, err := p.data(ctx)
if err != nil {
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 {
log.Errorf("store: error closing readcloser: %s", err)
}
}()
// execute the postData function no matter what happens
defer func() {
if p.postData != nil {
if err := p.postData(ctx); err != nil {
log.Errorf("store: error executing postData: %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 {
if _, err := rc.Read(firstBytes); err != nil {
return fmt.Errorf("store: error reading initial %d bytes: %s", maxFileHeaderBytes, err)
}
@ -303,29 +310,36 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
extension := split[1] // something like 'jpeg'
// concatenate the cleaned up first bytes with the existing bytes still in the reader (thanks Mara)
readerToStore := io.MultiReader(bytes.NewBuffer(firstBytes), reader)
multiReader := io.MultiReader(bytes.NewBuffer(firstBytes), rc)
// use the extension to derive the attachment type
// and, while we're in here, clean up exif data from
// the image if we already know the fileSize
var readerToStore io.Reader
switch extension {
case mimeGif:
p.attachment.Type = gtsmodel.FileTypeImage
// nothing to terminate, we can just store the multireader
readerToStore = multiReader
case mimeJpeg, mimePng:
p.attachment.Type = gtsmodel.FileTypeImage
if fileSize > 0 {
var err error
readerToStore, err = terminator.Terminate(readerToStore, int(fileSize), extension)
terminated, err := terminator.Terminate(multiReader, int(fileSize), extension)
if err != nil {
return fmt.Errorf("store: exif error: %s", err)
}
defer func() {
if rc, ok := readerToStore.(io.ReadCloser); ok {
if err := rc.Close(); err != nil {
if closer, ok := terminated.(io.Closer); ok {
if err := closer.Close(); err != nil {
log.Errorf("store: error closing terminator reader: %s", err)
}
}
}()
// store the exif-terminated version of what was in the multireader
readerToStore = terminated
} else {
// can't terminate if we don't know the file size, so just store the multiReader
readerToStore = multiReader
}
default:
return fmt.Errorf("store: couldn't process %s", extension)
@ -347,10 +361,6 @@ func (p *ProcessingMedia) store(ctx context.Context) error {
p.attachment.File.FileSize = int(fileSize)
p.read = true
if p.postData != nil {
return p.postData(ctx)
}
log.Tracef("store: finished storing initial data for attachment %s", p.attachment.URL)
return nil
}

4
internal/media/pruneremote_test.go
View file

@ -74,13 +74,13 @@ func (suite *PruneRemoteTestSuite) TestPruneAndRecache() {
suite.ErrorIs(err, storage.ErrNotFound)
// now recache the image....
data := func(_ context.Context) (io.Reader, int64, error) {
data := func(_ context.Context) (io.ReadCloser, int64, error) {
// load bytes from a test image
b, err := os.ReadFile("../../testrig/media/thoughtsofdog-original.jpeg")
if err != nil {
panic(err)
}
return bytes.NewBuffer(b), int64(len(b)), nil
return io.NopCloser(bytes.NewBuffer(b)), int64(len(b)), nil
}
processingRecache, err := suite.manager.RecacheMedia(ctx, data, nil, testAttachment.ID)
suite.NoError(err)

2
internal/media/types.go
View file

@ -118,7 +118,7 @@ type AdditionalEmojiInfo struct {
}
// DataFunc represents a function used to retrieve the raw bytes of a piece of media.
type DataFunc func(ctx context.Context) (reader io.Reader, fileSize int64, err error)
type DataFunc func(ctx context.Context) (reader io.ReadCloser, fileSize int64, err error)
// PostDataCallbackFunc represents a function executed after the DataFunc has been executed,
// and the returned reader has been read. It can be used to clean up any remaining resources.

4
internal/processing/account/update.go
View file

@ -192,7 +192,7 @@ func (p *processor) UpdateAvatar(ctx context.Context, avatar *multipart.FileHead
return nil, fmt.Errorf("UpdateAvatar: avatar with size %d exceeded max image size of %d bytes", avatar.Size, maxImageSize)
}
dataFunc := func(innerCtx context.Context) (io.Reader, int64, error) {
dataFunc := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
f, err := avatar.Open()
return f, avatar.Size, err
}
@ -219,7 +219,7 @@ func (p *processor) UpdateHeader(ctx context.Context, header *multipart.FileHead
return nil, fmt.Errorf("UpdateHeader: header with size %d exceeded max image size of %d bytes", header.Size, maxImageSize)
}
dataFunc := func(innerCtx context.Context) (io.Reader, int64, error) {
dataFunc := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
f, err := header.Open()
return f, header.Size, err
}

2
internal/processing/admin/createemoji.go
View file

@ -52,7 +52,7 @@ func (p *processor) EmojiCreate(ctx context.Context, account *gtsmodel.Account,
emojiURI := uris.GenerateURIForEmoji(emojiID)
data := func(innerCtx context.Context) (io.Reader, int64, error) {
data := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
f, err := form.Image.Open()
return f, form.Image.Size, err
}

2
internal/processing/media/create.go
View file

@ -30,7 +30,7 @@ import (
)
func (p *processor) Create(ctx context.Context, account *gtsmodel.Account, form *apimodel.AttachmentRequest) (*apimodel.Attachment, gtserror.WithCode) {
data := func(innerCtx context.Context) (io.Reader, int64, error) {
data := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
f, err := form.File.Open()
return f, form.File.Size, err
}

21
internal/processing/media/getfile.go
View file

@ -29,6 +29,7 @@ import (
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/media"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
@ -139,7 +140,7 @@ func (p *processor) getAttachmentContent(ctx context.Context, requestingAccount
// if it's the thumbnail that's requested then the user will have to wait a bit while we process the
// large version and derive a thumbnail from it, so use the normal recaching procedure: fetch the media,
// process it, then return the thumbnail data
data = func(innerCtx context.Context) (io.Reader, int64, error) {
data = func(innerCtx context.Context) (io.ReadCloser, int64, error) {
transport, err := p.transportController.NewTransportForUsername(innerCtx, requestingUsername)
if err != nil {
return nil, 0, err
@ -168,9 +169,9 @@ func (p *processor) getAttachmentContent(ctx context.Context, requestingAccount
bufferedReader := bufio.NewReaderSize(pipeReader, int(attachmentContent.ContentLength))
// the caller will read from the buffered reader, so it doesn't matter if they drop out without reading everything
attachmentContent.Content = bufferedReader
attachmentContent.Content = io.NopCloser(bufferedReader)
data = func(innerCtx context.Context) (io.Reader, int64, error) {
data = func(innerCtx context.Context) (io.ReadCloser, int64, error) {
transport, err := p.transportController.NewTransportForUsername(innerCtx, requestingUsername)
if err != nil {
return nil, 0, err
@ -195,17 +196,15 @@ func (p *processor) getAttachmentContent(ctx context.Context, requestingAccount
// close the pipewriter after data has been piped into it, so the reader on the other side doesn't block;
// we don't need to close the reader here because that's the caller's responsibility
postDataCallback = func(innerCtx context.Context) error {
// flush the buffered writer into the buffer of the reader...
if err := bufferedWriter.Flush(); err != nil {
return err
}
// and close the underlying pipe writer
// close the underlying pipe writer when we're done with it
defer func() {
if err := pipeWriter.Close(); err != nil {
return err
log.Errorf("getAttachmentContent: error closing pipeWriter: %s", err)
}
}()
return nil
// and flush the buffered writer into the buffer of the reader
return bufferedWriter.Flush()
}
}

14
internal/processing/media/getfile_test.go
View file

@ -91,10 +91,7 @@ func (suite *GetFileTestSuite) TestGetRemoteFileUncached() {
suite.NotNil(content)
b, err := io.ReadAll(content.Content)
suite.NoError(err)
if closer, ok := content.Content.(io.Closer); ok {
suite.NoError(closer.Close())
}
suite.NoError(content.Content.Close())
suite.Equal(suite.testRemoteAttachments[testAttachment.RemoteURL].Data, b)
suite.Equal(suite.testRemoteAttachments[testAttachment.RemoteURL].ContentType, content.ContentType)
@ -151,9 +148,7 @@ func (suite *GetFileTestSuite) TestGetRemoteFileUncachedInterrupted() {
suite.NoError(err)
// close the reader
if closer, ok := content.Content.(io.Closer); ok {
suite.NoError(closer.Close())
}
suite.NoError(content.Content.Close())
// the attachment should still be updated in the database even though the caller hung up
if !testrig.WaitFor(func() bool {
@ -201,10 +196,7 @@ func (suite *GetFileTestSuite) TestGetRemoteFileThumbnailUncached() {
suite.NotNil(content)
b, err := io.ReadAll(content.Content)
suite.NoError(err)
if closer, ok := content.Content.(io.Closer); ok {
suite.NoError(closer.Close())
}
suite.NoError(content.Content.Close())
suite.Equal(thumbnailBytes, b)
suite.Equal("image/jpeg", content.ContentType)