310 lines
10 KiB
Go
310 lines
10 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
|
|
|
|
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, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package media
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/superseriousbusiness/gotosocial/internal/config"
|
|
"github.com/superseriousbusiness/gotosocial/internal/db"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
|
"github.com/superseriousbusiness/gotosocial/internal/log"
|
|
"github.com/superseriousbusiness/gotosocial/internal/storage"
|
|
"github.com/superseriousbusiness/gotosocial/internal/uris"
|
|
)
|
|
|
|
// ProcessingEmoji represents an emoji currently processing. It exposes
|
|
// various functions for retrieving data from the process.
|
|
type ProcessingEmoji struct {
|
|
mu sync.Mutex
|
|
|
|
// id of this instance's account -- pinned for convenience here so we only need to fetch it once
|
|
instanceAccountID string
|
|
|
|
/*
|
|
below fields should be set on newly created media;
|
|
emoji will be updated incrementally as media goes through processing
|
|
*/
|
|
|
|
emoji *gtsmodel.Emoji
|
|
data DataFunc
|
|
postData PostDataCallbackFunc
|
|
read bool // bool indicating that data function has been triggered already
|
|
|
|
/*
|
|
below fields represent the processing state of the static of the emoji
|
|
*/
|
|
staticState int32
|
|
|
|
/*
|
|
below pointers to database and storage are maintained so that
|
|
the media can store and update itself during processing steps
|
|
*/
|
|
|
|
database db.DB
|
|
storage storage.Driver
|
|
|
|
err error // error created during processing, if any
|
|
|
|
// track whether this emoji has already been put in the databse
|
|
insertedInDB bool
|
|
}
|
|
|
|
// EmojiID returns the ID of the underlying emoji without blocking processing.
|
|
func (p *ProcessingEmoji) EmojiID() string {
|
|
return p.emoji.ID
|
|
}
|
|
|
|
// LoadEmoji blocks until the static and fullsize image
|
|
// has been processed, and then returns the completed emoji.
|
|
func (p *ProcessingEmoji) LoadEmoji(ctx context.Context) (*gtsmodel.Emoji, error) {
|
|
p.mu.Lock()
|
|
defer p.mu.Unlock()
|
|
|
|
if err := p.store(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := p.loadStatic(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// store the result in the database before returning it
|
|
if !p.insertedInDB {
|
|
if err := p.database.PutEmoji(ctx, p.emoji); err != nil {
|
|
return nil, err
|
|
}
|
|
p.insertedInDB = true
|
|
}
|
|
|
|
return p.emoji, nil
|
|
}
|
|
|
|
// Finished returns true if processing has finished for both the thumbnail
|
|
// and full fized version of this piece of media.
|
|
func (p *ProcessingEmoji) Finished() bool {
|
|
return atomic.LoadInt32(&p.staticState) == int32(complete)
|
|
}
|
|
|
|
func (p *ProcessingEmoji) loadStatic(ctx context.Context) error {
|
|
staticState := atomic.LoadInt32(&p.staticState)
|
|
switch processState(staticState) {
|
|
case received:
|
|
// stream the original file out of storage...
|
|
stored, err := p.storage.GetStream(ctx, p.emoji.ImagePath)
|
|
if err != nil {
|
|
p.err = fmt.Errorf("loadStatic: error fetching file from storage: %s", err)
|
|
atomic.StoreInt32(&p.staticState, int32(errored))
|
|
return p.err
|
|
}
|
|
|
|
// we haven't processed a static version of this emoji yet so do it now
|
|
static, err := deriveStaticEmoji(stored, p.emoji.ImageContentType)
|
|
if err != nil {
|
|
p.err = fmt.Errorf("loadStatic: error deriving static: %s", err)
|
|
atomic.StoreInt32(&p.staticState, int32(errored))
|
|
return p.err
|
|
}
|
|
|
|
if err := stored.Close(); err != nil {
|
|
p.err = fmt.Errorf("loadStatic: error closing stored full size: %s", err)
|
|
atomic.StoreInt32(&p.staticState, int32(errored))
|
|
return p.err
|
|
}
|
|
|
|
// put the static in storage
|
|
if err := p.storage.Put(ctx, p.emoji.ImageStaticPath, static.small); err != nil {
|
|
p.err = fmt.Errorf("loadStatic: error storing static: %s", err)
|
|
atomic.StoreInt32(&p.staticState, int32(errored))
|
|
return p.err
|
|
}
|
|
|
|
p.emoji.ImageStaticFileSize = len(static.small)
|
|
|
|
// we're done processing the static version of the emoji!
|
|
atomic.StoreInt32(&p.staticState, int32(complete))
|
|
fallthrough
|
|
case complete:
|
|
return nil
|
|
case errored:
|
|
return p.err
|
|
}
|
|
|
|
return fmt.Errorf("static processing status %d unknown", p.staticState)
|
|
}
|
|
|
|
// store calls the data function attached to p if it hasn't been called yet,
|
|
// and updates the underlying attachment fields as necessary. It will then stream
|
|
// bytes from p's reader directly into storage so that it can be retrieved later.
|
|
func (p *ProcessingEmoji) store(ctx context.Context) error {
|
|
// check if we've already done this and bail early if we have
|
|
if p.read {
|
|
return nil
|
|
}
|
|
|
|
// execute the data function to get the reader out of it
|
|
reader, fileSize, err := p.data(ctx)
|
|
if err != nil {
|
|
return fmt.Errorf("store: error executing data function: %s", err)
|
|
}
|
|
|
|
maxSize := config.GetMediaEmojiRemoteMaxSize()
|
|
if fileSize > maxSize {
|
|
return fmt.Errorf("store: emoji size (%db) is larger than allowed emojiRemoteMaxSize (%db)", fileSize, maxSize)
|
|
}
|
|
|
|
// 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 {
|
|
return fmt.Errorf("store: error reading initial %d bytes: %s", maxFileHeaderBytes, err)
|
|
}
|
|
|
|
// now we have the file header we can work out the content type from it
|
|
contentType, err := parseContentType(firstBytes)
|
|
if err != nil {
|
|
return fmt.Errorf("store: error parsing content type: %s", err)
|
|
}
|
|
|
|
// bail if this is a type we can't process
|
|
if !supportedEmoji(contentType) {
|
|
return fmt.Errorf("store: content type %s was not valid for an emoji", contentType)
|
|
}
|
|
|
|
// extract the file extension
|
|
split := strings.Split(contentType, "/")
|
|
extension := split[1] // something like 'gif'
|
|
|
|
// set some additional fields on the emoji now that
|
|
// we know more about what the underlying image actually is
|
|
p.emoji.ImageURL = uris.GenerateURIForAttachment(p.instanceAccountID, string(TypeEmoji), string(SizeOriginal), p.emoji.ID, extension)
|
|
p.emoji.ImagePath = fmt.Sprintf("%s/%s/%s/%s.%s", p.instanceAccountID, TypeEmoji, SizeOriginal, p.emoji.ID, extension)
|
|
p.emoji.ImageContentType = contentType
|
|
p.emoji.ImageFileSize = fileSize
|
|
|
|
// concatenate the first bytes with the existing bytes still in the reader (thanks Mara)
|
|
multiReader := io.MultiReader(bytes.NewBuffer(firstBytes), reader)
|
|
|
|
// store this for now -- other processes can pull it out of storage as they please
|
|
if err := p.storage.PutStream(ctx, p.emoji.ImagePath, multiReader); err != nil {
|
|
return fmt.Errorf("store: error storing stream: %s", err)
|
|
}
|
|
|
|
p.read = true
|
|
|
|
if p.postData != nil {
|
|
return p.postData(ctx)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (m *manager) preProcessEmoji(ctx context.Context, data DataFunc, postData PostDataCallbackFunc, shortcode string, id string, uri string, ai *AdditionalEmojiInfo) (*ProcessingEmoji, error) {
|
|
instanceAccount, err := m.db.GetInstanceAccount(ctx, "")
|
|
if err != nil {
|
|
return nil, fmt.Errorf("preProcessEmoji: error fetching this instance account from the db: %s", err)
|
|
}
|
|
|
|
disabled := false
|
|
visibleInPicker := true
|
|
|
|
// populate initial fields on the emoji -- some of these will be overwritten as we proceed
|
|
emoji := >smodel.Emoji{
|
|
ID: id,
|
|
CreatedAt: time.Now(),
|
|
UpdatedAt: time.Now(),
|
|
Shortcode: shortcode,
|
|
Domain: "", // assume our own domain unless told otherwise
|
|
ImageRemoteURL: "",
|
|
ImageStaticRemoteURL: "",
|
|
ImageURL: "", // we don't know yet
|
|
ImageStaticURL: uris.GenerateURIForAttachment(instanceAccount.ID, string(TypeEmoji), string(SizeStatic), id, mimePng), // all static emojis are encoded as png
|
|
ImagePath: "", // we don't know yet
|
|
ImageStaticPath: fmt.Sprintf("%s/%s/%s/%s.%s", instanceAccount.ID, TypeEmoji, SizeStatic, id, mimePng), // all static emojis are encoded as png
|
|
ImageContentType: "", // we don't know yet
|
|
ImageStaticContentType: mimeImagePng, // all static emojis are encoded as png
|
|
ImageFileSize: 0,
|
|
ImageStaticFileSize: 0,
|
|
ImageUpdatedAt: time.Now(),
|
|
Disabled: &disabled,
|
|
URI: uri,
|
|
VisibleInPicker: &visibleInPicker,
|
|
CategoryID: "",
|
|
}
|
|
|
|
// check if we have additional info to add to the emoji,
|
|
// and overwrite some of the emoji fields if so
|
|
if ai != nil {
|
|
if ai.CreatedAt != nil {
|
|
emoji.CreatedAt = *ai.CreatedAt
|
|
}
|
|
|
|
if ai.Domain != nil {
|
|
emoji.Domain = *ai.Domain
|
|
}
|
|
|
|
if ai.ImageRemoteURL != nil {
|
|
emoji.ImageRemoteURL = *ai.ImageRemoteURL
|
|
}
|
|
|
|
if ai.ImageStaticRemoteURL != nil {
|
|
emoji.ImageStaticRemoteURL = *ai.ImageStaticRemoteURL
|
|
}
|
|
|
|
if ai.Disabled != nil {
|
|
emoji.Disabled = ai.Disabled
|
|
}
|
|
|
|
if ai.VisibleInPicker != nil {
|
|
emoji.VisibleInPicker = ai.VisibleInPicker
|
|
}
|
|
|
|
if ai.CategoryID != nil {
|
|
emoji.CategoryID = *ai.CategoryID
|
|
}
|
|
}
|
|
|
|
processingEmoji := &ProcessingEmoji{
|
|
instanceAccountID: instanceAccount.ID,
|
|
emoji: emoji,
|
|
data: data,
|
|
postData: postData,
|
|
staticState: int32(received),
|
|
database: m.db,
|
|
storage: m.storage,
|
|
}
|
|
|
|
return processingEmoji, nil
|
|
}
|