file.go 20.1 KB
Newer Older
1
// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
2 3 4 5 6 7 8 9 10
// See License.txt for license information.

package app

import (
	"bytes"
	"crypto/sha256"
	"encoding/base64"
	"fmt"
11 12 13
	"image"
	"image/color"
	"image/draw"
14
	_ "image/gif"
15
	"image/jpeg"
16
	"io"
17
	"mime/multipart"
18
	"net/http"
19 20 21 22
	"net/url"
	"path/filepath"
	"strings"
	"sync"
23
	"time"
24

25
	"github.com/disintegration/imaging"
26 27
	"github.com/rwcarlsen/goexif/exif"
	_ "golang.org/x/image/bmp"
28

29
	"github.com/mattermost/mattermost-server/mlog"
Christopher Speller's avatar
Christopher Speller committed
30
	"github.com/mattermost/mattermost-server/model"
31
	"github.com/mattermost/mattermost-server/plugin"
Christopher Speller's avatar
Christopher Speller committed
32
	"github.com/mattermost/mattermost-server/utils"
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
)

const (
	/*
	  EXIF Image Orientations
	  1        2       3      4         5            6           7          8

	  888888  888888      88  88      8888888888  88                  88  8888888888
	  88          88      88  88      88  88      88  88          88  88      88  88
	  8888      8888    8888  8888    88          8888888888  8888888888          88
	  88          88      88  88
	  88          88  888888  888888
	*/
	Upright            = 1
	UprightMirrored    = 2
	UpsideDown         = 3
	UpsideDownMirrored = 4
	RotatedCWMirrored  = 5
	RotatedCCW         = 6
	RotatedCCWMirrored = 7
	RotatedCW          = 8

55 56
	MaxImageSize                 = 6048 * 4032 // 24 megapixels, roughly 36MB as a raw image
	IMAGE_THUMBNAIL_PIXEL_WIDTH  = 120
57
	IMAGE_THUMBNAIL_PIXEL_HEIGHT = 100
58
	IMAGE_PREVIEW_PIXEL_WIDTH    = 1920
59 60
)

61
func (a *App) FileBackend() (utils.FileBackend, *model.AppError) {
62 63
	license := a.License()
	return utils.NewFileBackend(&a.Config().FileSettings, license != nil && *license.Features.Compliance)
64 65 66 67 68 69 70 71 72 73
}

func (a *App) ReadFile(path string) ([]byte, *model.AppError) {
	backend, err := a.FileBackend()
	if err != nil {
		return nil, err
	}
	return backend.ReadFile(path)
}

74 75
// Caller must close the first return value
func (a *App) FileReader(path string) (io.ReadCloser, *model.AppError) {
76 77 78 79 80 81 82
	backend, err := a.FileBackend()
	if err != nil {
		return nil, err
	}
	return backend.Reader(path)
}

83 84 85 86 87 88 89 90
func (a *App) FileExists(path string) (bool, *model.AppError) {
	backend, err := a.FileBackend()
	if err != nil {
		return false, err
	}
	return backend.FileExists(path)
}

91 92 93 94 95 96 97 98
func (a *App) MoveFile(oldPath, newPath string) *model.AppError {
	backend, err := a.FileBackend()
	if err != nil {
		return err
	}
	return backend.MoveFile(oldPath, newPath)
}

99
func (a *App) WriteFile(fr io.Reader, path string) (int64, *model.AppError) {
100 101
	backend, err := a.FileBackend()
	if err != nil {
102
		return 0, err
103
	}
104 105

	return backend.WriteFile(fr, path)
106 107 108 109 110 111 112 113 114 115 116
}

func (a *App) RemoveFile(path string) *model.AppError {
	backend, err := a.FileBackend()
	if err != nil {
		return err
	}
	return backend.RemoveFile(path)
}

func (a *App) GetInfoForFilename(post *model.Post, teamId string, filename string) *model.FileInfo {
117 118 119
	// Find the path from the Filename of the form /{channelId}/{userId}/{uid}/{nameWithExtension}
	split := strings.SplitN(filename, "/", 5)
	if len(split) < 5 {
120
		mlog.Error("Unable to decipher filename when migrating post to use FileInfos", mlog.String("post_id", post.Id), mlog.String("filename", filename))
121 122 123 124 125 126 127 128 129
		return nil
	}

	channelId := split[1]
	userId := split[2]
	oldId := split[3]
	name, _ := url.QueryUnescape(split[4])

	if split[0] != "" || split[1] != post.ChannelId || split[2] != post.UserId || strings.Contains(split[4], "/") {
130 131 132 133 134 135 136
		mlog.Warn(
			"Found an unusual filename when migrating post to use FileInfos",
			mlog.String("post_id", post.Id),
			mlog.String("channel_id", post.ChannelId),
			mlog.String("user_id", post.UserId),
			mlog.String("filename", filename),
		)
137 138 139 140 141 142 143
	}

	pathPrefix := fmt.Sprintf("teams/%s/channels/%s/users/%s/%s/", teamId, channelId, userId, oldId)
	path := pathPrefix + name

	// Open the file and populate the fields of the FileInfo
	var info *model.FileInfo
144
	if data, err := a.ReadFile(path); err != nil {
145 146 147 148 149 150
		mlog.Error(
			fmt.Sprintf("File not found when migrating post to use FileInfos, err=%v", err),
			mlog.String("post_id", post.Id),
			mlog.String("filename", filename),
			mlog.String("path", path),
		)
151 152 153 154 155
		return nil
	} else {
		var err *model.AppError
		info, err = model.GetInfoForBytes(name, data)
		if err != nil {
156 157 158 159 160
			mlog.Warn(
				fmt.Sprintf("Unable to fully decode file info when migrating post to use FileInfos, err=%v", err),
				mlog.String("post_id", post.Id),
				mlog.String("filename", filename),
			)
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
		}
	}

	// Generate a new ID because with the old system, you could very rarely get multiple posts referencing the same file
	info.Id = model.NewId()
	info.CreatorId = post.UserId
	info.PostId = post.Id
	info.CreateAt = post.CreateAt
	info.UpdateAt = post.UpdateAt
	info.Path = path

	if info.IsImage() {
		nameWithoutExtension := name[:strings.LastIndex(name, ".")]
		info.PreviewPath = pathPrefix + nameWithoutExtension + "_preview.jpg"
		info.ThumbnailPath = pathPrefix + nameWithoutExtension + "_thumb.jpg"
	}

	return info
}

Chris's avatar
Chris committed
181
func (a *App) FindTeamIdForFilename(post *model.Post, filename string) string {
182 183 184 185 186
	split := strings.SplitN(filename, "/", 5)
	id := split[3]
	name, _ := url.QueryUnescape(split[4])

	// This post is in a direct channel so we need to figure out what team the files are stored under.
Chris's avatar
Chris committed
187
	if result := <-a.Srv.Store.Team().GetTeamsByUserId(post.UserId); result.Err != nil {
188
		mlog.Error(fmt.Sprintf("Unable to get teams when migrating post to use FileInfo, err=%v", result.Err), mlog.String("post_id", post.Id))
189 190 191 192 193 194
	} else if teams := result.Data.([]*model.Team); len(teams) == 1 {
		// The user has only one team so the post must've been sent from it
		return teams[0].Id
	} else {
		for _, team := range teams {
			path := fmt.Sprintf("teams/%s/channels/%s/users/%s/%s/%s", team.Id, post.ChannelId, post.UserId, id, name)
195
			if _, err := a.ReadFile(path); err == nil {
196 197 198 199 200 201 202 203 204 205 206 207
				// Found the team that this file was posted from
				return team.Id
			}
		}
	}

	return ""
}

var fileMigrationLock sync.Mutex

// Creates and stores FileInfos for a post created before the FileInfos table existed.
Chris's avatar
Chris committed
208
func (a *App) MigrateFilenamesToFileInfos(post *model.Post) []*model.FileInfo {
209
	if len(post.Filenames) == 0 {
210
		mlog.Warn("Unable to migrate post to use FileInfos with an empty Filenames field", mlog.String("post_id", post.Id))
211 212 213
		return []*model.FileInfo{}
	}

Chris's avatar
Chris committed
214
	cchan := a.Srv.Store.Channel().Get(post.ChannelId, true)
215 216 217 218 219 220

	// There's a weird bug that rarely happens where a post ends up with duplicate Filenames so remove those
	filenames := utils.RemoveDuplicatesFromStringArray(post.Filenames)

	var channel *model.Channel
	if result := <-cchan; result.Err != nil {
221 222 223 224 225
		mlog.Error(
			fmt.Sprintf("Unable to get channel when migrating post to use FileInfos, err=%v", result.Err),
			mlog.String("post_id", post.Id),
			mlog.String("channel_id", post.ChannelId),
		)
226 227 228 229 230 231 232 233 234
		return []*model.FileInfo{}
	} else {
		channel = result.Data.(*model.Channel)
	}

	// Find the team that was used to make this post since its part of the file path that isn't saved in the Filename
	var teamId string
	if channel.TeamId == "" {
		// This post was made in a cross-team DM channel so we need to find where its files were saved
Chris's avatar
Chris committed
235
		teamId = a.FindTeamIdForFilename(post, filenames[0])
236 237 238 239 240 241 242
	} else {
		teamId = channel.TeamId
	}

	// Create FileInfo objects for this post
	infos := make([]*model.FileInfo, 0, len(filenames))
	if teamId == "" {
243 244 245 246
		mlog.Error(
			fmt.Sprintf("Unable to find team id for files when migrating post to use FileInfos, filenames=%v", filenames),
			mlog.String("post_id", post.Id),
		)
247 248
	} else {
		for _, filename := range filenames {
249
			info := a.GetInfoForFilename(post, teamId, filename)
250 251 252 253 254 255 256 257 258 259 260 261
			if info == nil {
				continue
			}

			infos = append(infos, info)
		}
	}

	// Lock to prevent only one migration thread from trying to update the post at once, preventing duplicate FileInfos from being created
	fileMigrationLock.Lock()
	defer fileMigrationLock.Unlock()

Chris's avatar
Chris committed
262
	if result := <-a.Srv.Store.Post().Get(post.Id); result.Err != nil {
263
		mlog.Error(fmt.Sprintf("Unable to get post when migrating post to use FileInfos, err=%v", result.Err), mlog.String("post_id", post.Id))
264 265 266
		return []*model.FileInfo{}
	} else if newPost := result.Data.(*model.PostList).Posts[post.Id]; len(newPost.Filenames) != len(post.Filenames) {
		// Another thread has already created FileInfos for this post, so just return those
Chris's avatar
Chris committed
267
		if result := <-a.Srv.Store.FileInfo().GetForPost(post.Id, true, false); result.Err != nil {
268
			mlog.Error(fmt.Sprintf("Unable to get FileInfos for migrated post, err=%v", result.Err), mlog.String("post_id", post.Id))
269 270
			return []*model.FileInfo{}
		} else {
271
			mlog.Debug("Post already migrated to use FileInfos", mlog.String("post_id", post.Id))
272 273 274 275
			return result.Data.([]*model.FileInfo)
		}
	}

276
	mlog.Debug("Migrating post to use FileInfos", mlog.String("post_id", post.Id))
277 278 279 280

	savedInfos := make([]*model.FileInfo, 0, len(infos))
	fileIds := make([]string, 0, len(filenames))
	for _, info := range infos {
Chris's avatar
Chris committed
281
		if result := <-a.Srv.Store.FileInfo().Save(info); result.Err != nil {
282 283 284 285 286 287
			mlog.Error(
				fmt.Sprintf("Unable to save file info when migrating post to use FileInfos, err=%v", result.Err),
				mlog.String("post_id", post.Id),
				mlog.String("file_info_id", info.Id),
				mlog.String("file_info_path", info.Path),
			)
288 289 290 291 292 293 294 295 296 297 298 299 300 301 302
			continue
		}

		savedInfos = append(savedInfos, info)
		fileIds = append(fileIds, info.Id)
	}

	// Copy and save the updated post
	newPost := &model.Post{}
	*newPost = *post

	newPost.Filenames = []string{}
	newPost.FileIds = fileIds

	// Update Posts to clear Filenames and set FileIds
Chris's avatar
Chris committed
303
	if result := <-a.Srv.Store.Post().Update(newPost, post); result.Err != nil {
304
		mlog.Error(fmt.Sprintf("Unable to save migrated post when migrating to use FileInfos, new_file_ids=%v, old_filenames=%v, err=%v", newPost.FileIds, post.Filenames, result.Err), mlog.String("post_id", post.Id))
305 306 307 308 309 310
		return []*model.FileInfo{}
	} else {
		return savedInfos
	}
}

Chris's avatar
Chris committed
311 312
func (a *App) GeneratePublicLink(siteURL string, info *model.FileInfo) string {
	hash := GeneratePublicLinkHash(info.Id, *a.Config().FileSettings.PublicLinkSalt)
313 314 315
	return fmt.Sprintf("%s/files/%v/public?h=%s", siteURL, info.Id, hash)
}

316 317 318 319 320 321 322
func GeneratePublicLinkHash(fileId, salt string) string {
	hash := sha256.New()
	hash.Write([]byte(salt))
	hash.Write([]byte(fileId))

	return base64.RawURLEncoding.EncodeToString(hash.Sum(nil))
}
323

324
func (a *App) UploadMultipartFiles(teamId string, channelId string, userId string, fileHeaders []*multipart.FileHeader, clientIds []string, now time.Time) (*model.FileUploadResponse, *model.AppError) {
325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
	files := make([]io.ReadCloser, len(fileHeaders))
	filenames := make([]string, len(fileHeaders))

	for i, fileHeader := range fileHeaders {
		file, fileErr := fileHeader.Open()
		if fileErr != nil {
			return nil, model.NewAppError("UploadFiles", "api.file.upload_file.bad_parse.app_error", nil, fileErr.Error(), http.StatusBadRequest)
		}

		// Will be closed after UploadFiles returns
		defer file.Close()

		files[i] = file
		filenames[i] = fileHeader.Filename
	}

341
	return a.UploadFiles(teamId, channelId, userId, files, filenames, clientIds, now)
342 343 344 345 346
}

// Uploads some files to the given team and channel as the given user. files and filenames should have
// the same length. clientIds should either not be provided or have the same length as files and filenames.
// The provided files should be closed by the caller so that they are not leaked.
347
func (a *App) UploadFiles(teamId string, channelId string, userId string, files []io.ReadCloser, filenames []string, clientIds []string, now time.Time) (*model.FileUploadResponse, *model.AppError) {
Chris's avatar
Chris committed
348
	if len(*a.Config().FileSettings.DriverName) == 0 {
349 350 351
		return nil, model.NewAppError("uploadFile", "api.file.upload_file.storage.app_error", nil, "", http.StatusNotImplemented)
	}

352 353 354 355
	if len(filenames) != len(files) || (len(clientIds) > 0 && len(clientIds) != len(files)) {
		return nil, model.NewAppError("UploadFiles", "api.file.upload_file.incorrect_number_of_files.app_error", nil, "", http.StatusBadRequest)
	}

356 357 358 359 360 361 362 363 364
	resStruct := &model.FileUploadResponse{
		FileInfos: []*model.FileInfo{},
		ClientIds: []string{},
	}

	previewPathList := []string{}
	thumbnailPathList := []string{}
	imageDataList := [][]byte{}

365
	for i, file := range files {
366 367 368 369
		buf := bytes.NewBuffer(nil)
		io.Copy(buf, file)
		data := buf.Bytes()

370
		info, data, err := a.DoUploadFileExpectModification(now, teamId, channelId, userId, filenames[i], data)
371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
		if err != nil {
			return nil, err
		}

		if info.PreviewPath != "" || info.ThumbnailPath != "" {
			previewPathList = append(previewPathList, info.PreviewPath)
			thumbnailPathList = append(thumbnailPathList, info.ThumbnailPath)
			imageDataList = append(imageDataList, data)
		}

		resStruct.FileInfos = append(resStruct.FileInfos, info)

		if len(clientIds) > 0 {
			resStruct.ClientIds = append(resStruct.ClientIds, clientIds[i])
		}
	}

388
	a.HandleImages(previewPathList, thumbnailPathList, imageDataList)
389 390 391 392

	return resStruct, nil
}

393
func (a *App) DoUploadFile(now time.Time, rawTeamId string, rawChannelId string, rawUserId string, rawFilename string, data []byte) (*model.FileInfo, *model.AppError) {
394 395 396 397 398
	info, _, err := a.DoUploadFileExpectModification(now, rawTeamId, rawChannelId, rawUserId, rawFilename, data)
	return info, err
}

func (a *App) DoUploadFileExpectModification(now time.Time, rawTeamId string, rawChannelId string, rawUserId string, rawFilename string, data []byte) (*model.FileInfo, []byte, *model.AppError) {
399
	filename := filepath.Base(rawFilename)
400 401 402
	teamId := filepath.Base(rawTeamId)
	channelId := filepath.Base(rawChannelId)
	userId := filepath.Base(rawUserId)
403 404 405 406

	info, err := model.GetInfoForBytes(filename, data)
	if err != nil {
		err.StatusCode = http.StatusBadRequest
407
		return nil, data, err
408 409
	}

410 411 412 413 414 415 416 417
	if orientation, err := getImageOrientation(bytes.NewReader(data)); err == nil &&
		(orientation == RotatedCWMirrored ||
			orientation == RotatedCCW ||
			orientation == RotatedCCWMirrored ||
			orientation == RotatedCW) {
		info.Width, info.Height = info.Height, info.Width
	}

418 419
	info.Id = model.NewId()
	info.CreatorId = userId
420
	info.CreateAt = now.UnixNano() / int64(time.Millisecond)
421

422
	pathPrefix := now.Format("20060102") + "/teams/" + teamId + "/channels/" + channelId + "/users/" + userId + "/" + info.Id + "/"
423 424 425 426 427
	info.Path = pathPrefix + filename

	if info.IsImage() {
		// Check dimensions before loading the whole thing into memory later on
		if info.Width*info.Height > MaxImageSize {
428
			err := model.NewAppError("uploadFile", "api.file.upload_file.large_image.app_error", map[string]interface{}{"Filename": filename}, "", http.StatusBadRequest)
429
			return nil, data, err
430 431 432 433 434 435 436
		}

		nameWithoutExtension := filename[:strings.LastIndex(filename, ".")]
		info.PreviewPath = pathPrefix + nameWithoutExtension + "_preview.jpg"
		info.ThumbnailPath = pathPrefix + nameWithoutExtension + "_thumb.jpg"
	}

437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454
	if a.PluginsReady() {
		pluginContext := &plugin.Context{}
		var rejectionReason string
		a.Plugins.RunMultiPluginHook(func(hooks plugin.Hooks) bool {
			var newBytes bytes.Buffer
			info, rejectionReason = hooks.FileWillBeUploaded(pluginContext, info, bytes.NewReader(data), &newBytes)
			rejected := info == nil
			if !rejected && newBytes.Len() != 0 {
				data = newBytes.Bytes()
				info.Size = int64(len(data))
			}
			return !rejected
		}, plugin.FileWillBeUploadedId)
		if info == nil {
			return nil, data, model.NewAppError("DoUploadFile", "File rejected by plugin. "+rejectionReason, nil, "", http.StatusBadRequest)
		}
	}

455
	if _, err := a.WriteFile(bytes.NewReader(data), info.Path); err != nil {
456
		return nil, data, err
457 458
	}

Chris's avatar
Chris committed
459
	if result := <-a.Srv.Store.FileInfo().Save(info); result.Err != nil {
460
		return nil, data, result.Err
461 462
	}

463
	return info, data, nil
464 465
}

466
func (a *App) HandleImages(previewPathList []string, thumbnailPathList []string, fileData [][]byte) {
467 468 469 470 471 472 473 474
	wg := new(sync.WaitGroup)

	for i := range fileData {
		img, width, height := prepareImage(fileData[i])
		if img != nil {
			wg.Add(2)
			go func(img *image.Image, path string, width int, height int) {
				defer wg.Done()
475
				a.generateThumbnailImage(*img, path, width, height)
476
			}(img, thumbnailPathList[i], width, height)
477 478 479

			go func(img *image.Image, path string, width int) {
				defer wg.Done()
480
				a.generatePreviewImage(*img, path, width)
481 482
			}(img, previewPathList[i], width)
		}
483
	}
484
	wg.Wait()
485 486 487 488 489 490
}

func prepareImage(fileData []byte) (*image.Image, int, int) {
	// Decode image bytes into Image object
	img, imgType, err := image.Decode(bytes.NewReader(fileData))
	if err != nil {
491
		mlog.Error(fmt.Sprintf("Unable to decode image err=%v", err))
492 493 494 495 496 497 498 499 500 501 502 503 504 505 506
		return nil, 0, 0
	}

	width := img.Bounds().Dx()
	height := img.Bounds().Dy()

	// Fill in the background of a potentially-transparent png file as white
	if imgType == "png" {
		dst := image.NewRGBA(img.Bounds())
		draw.Draw(dst, dst.Bounds(), image.NewUniform(color.White), image.Point{}, draw.Src)
		draw.Draw(dst, dst.Bounds(), img, img.Bounds().Min, draw.Over)
		img = dst
	}

	// Flip the image to be upright
507 508
	orientation, _ := getImageOrientation(bytes.NewReader(fileData))
	img = makeImageUpright(img, orientation)
509

510 511 512 513
	return &img, width, height
}

func makeImageUpright(img image.Image, orientation int) image.Image {
514 515
	switch orientation {
	case UprightMirrored:
516
		return imaging.FlipH(img)
517
	case UpsideDown:
518
		return imaging.Rotate180(img)
519
	case UpsideDownMirrored:
520
		return imaging.FlipV(img)
521
	case RotatedCWMirrored:
522
		return imaging.Transpose(img)
523
	case RotatedCCW:
524
		return imaging.Rotate270(img)
525
	case RotatedCCWMirrored:
526
		return imaging.Transverse(img)
527
	case RotatedCW:
528 529 530
		return imaging.Rotate90(img)
	default:
		return img
531 532 533
	}
}

534 535
func getImageOrientation(input io.Reader) (int, error) {
	if exifData, err := exif.Decode(input); err != nil {
536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
		return Upright, err
	} else {
		if tag, err := exifData.Get("Orientation"); err != nil {
			return Upright, err
		} else {
			orientation, err := tag.Int(0)
			if err != nil {
				return Upright, err
			} else {
				return orientation, nil
			}
		}
	}
}

551
func (a *App) generateThumbnailImage(img image.Image, thumbnailPath string, width int, height int) {
552 553 554 555 556
	thumbWidth := float64(IMAGE_THUMBNAIL_PIXEL_WIDTH)
	thumbHeight := float64(IMAGE_THUMBNAIL_PIXEL_HEIGHT)
	imgWidth := float64(width)
	imgHeight := float64(height)

557
	var thumbnail image.Image
558
	if imgHeight < IMAGE_THUMBNAIL_PIXEL_HEIGHT && imgWidth < thumbWidth {
559
		thumbnail = img
560 561
	} else if imgHeight/imgWidth < thumbHeight/thumbWidth {
		thumbnail = imaging.Resize(img, 0, IMAGE_THUMBNAIL_PIXEL_HEIGHT, imaging.Lanczos)
562
	} else {
563
		thumbnail = imaging.Resize(img, IMAGE_THUMBNAIL_PIXEL_WIDTH, 0, imaging.Lanczos)
564 565 566 567
	}

	buf := new(bytes.Buffer)
	if err := jpeg.Encode(buf, thumbnail, &jpeg.Options{Quality: 90}); err != nil {
568
		mlog.Error(fmt.Sprintf("Unable to encode image as jpeg path=%v err=%v", thumbnailPath, err))
569 570 571
		return
	}

572
	if _, err := a.WriteFile(buf, thumbnailPath); err != nil {
573
		mlog.Error(fmt.Sprintf("Unable to upload thumbnail path=%v err=%v", thumbnailPath, err))
574 575 576 577
		return
	}
}

578
func (a *App) generatePreviewImage(img image.Image, previewPath string, width int) {
579
	var preview image.Image
580 581 582

	if width > IMAGE_PREVIEW_PIXEL_WIDTH {
		preview = imaging.Resize(img, IMAGE_PREVIEW_PIXEL_WIDTH, 0, imaging.Lanczos)
583 584 585 586 587 588 589
	} else {
		preview = img
	}

	buf := new(bytes.Buffer)

	if err := jpeg.Encode(buf, preview, &jpeg.Options{Quality: 90}); err != nil {
590
		mlog.Error(fmt.Sprintf("Unable to encode image as preview jpg err=%v", err), mlog.String("path", previewPath))
591 592 593
		return
	}

594
	if _, err := a.WriteFile(buf, previewPath); err != nil {
595
		mlog.Error(fmt.Sprintf("Unable to upload preview err=%v", err), mlog.String("path", previewPath))
596 597 598
		return
	}
}
599

Chris's avatar
Chris committed
600 601
func (a *App) GetFileInfo(fileId string) (*model.FileInfo, *model.AppError) {
	if result := <-a.Srv.Store.FileInfo().Get(fileId); result.Err != nil {
602 603 604 605 606
		return nil, result.Err
	} else {
		return result.Data.(*model.FileInfo), nil
	}
}
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636

func (a *App) CopyFileInfos(userId string, fileIds []string) ([]string, *model.AppError) {
	newFileIds := []string{}

	now := model.GetMillis()

	for _, fileId := range fileIds {
		fileInfo := &model.FileInfo{}

		if result := <-a.Srv.Store.FileInfo().Get(fileId); result.Err != nil {
			return nil, result.Err
		} else {
			fileInfo = result.Data.(*model.FileInfo)
		}

		fileInfo.Id = model.NewId()
		fileInfo.CreatorId = userId
		fileInfo.CreateAt = now
		fileInfo.UpdateAt = now
		fileInfo.PostId = ""

		if result := <-a.Srv.Store.FileInfo().Save(fileInfo); result.Err != nil {
			return newFileIds, result.Err
		}

		newFileIds = append(newFileIds, fileInfo.Id)
	}

	return newFileIds, nil
}