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memos/server/resource.go
Athurg Gooth 0cea5ebaeb
fix: concurrent counter operates ()
Co-authored-by: Athurg Feng <athurg@gooth.org>
2023-05-22 11:08:49 +08:00

549 lines
20 KiB
Go

package server
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"regexp"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/disintegration/imaging"
"github.com/labstack/echo/v4"
"github.com/pkg/errors"
"github.com/usememos/memos/api"
"github.com/usememos/memos/common"
"github.com/usememos/memos/common/log"
"github.com/usememos/memos/plugin/storage/s3"
"go.uber.org/zap"
)
const (
// The upload memory buffer is 32 MiB.
// It should be kept low, so RAM usage doesn't get out of control.
// This is unrelated to maximum upload size limit, which is now set through system setting.
maxUploadBufferSizeBytes = 32 << 20
MebiByte = 1024 * 1024
// thumbnailImagePath is the directory to store image thumbnails.
thumbnailImagePath = ".thumbnail_cache"
)
var fileKeyPattern = regexp.MustCompile(`\{[a-z]{1,9}\}`)
func (s *Server) registerResourceRoutes(g *echo.Group) {
g.POST("/resource", func(c echo.Context) error {
ctx := c.Request().Context()
userID, ok := c.Get(getUserIDContextKey()).(int)
if !ok {
return echo.NewHTTPError(http.StatusUnauthorized, "Missing user in session")
}
resourceCreate := &api.ResourceCreate{}
if err := json.NewDecoder(c.Request().Body).Decode(resourceCreate); err != nil {
return echo.NewHTTPError(http.StatusBadRequest, "Malformatted post resource request").SetInternal(err)
}
resourceCreate.CreatorID = userID
// Only allow those external links with http prefix.
if resourceCreate.ExternalLink != "" && !strings.HasPrefix(resourceCreate.ExternalLink, "http") {
return echo.NewHTTPError(http.StatusBadRequest, "Invalid external link")
}
resource, err := s.Store.CreateResource(ctx, resourceCreate)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create resource").SetInternal(err)
}
if err := s.createResourceCreateActivity(c, resource); err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
}
return c.JSON(http.StatusOK, composeResponse(resource))
})
g.POST("/resource/blob", func(c echo.Context) error {
ctx := c.Request().Context()
userID, ok := c.Get(getUserIDContextKey()).(int)
if !ok {
return echo.NewHTTPError(http.StatusUnauthorized, "Missing user in session")
}
// This is the backend default max upload size limit.
maxUploadSetting := s.Store.GetSystemSettingValueOrDefault(&ctx, api.SystemSettingMaxUploadSizeMiBName, "32")
var settingMaxUploadSizeBytes int
if settingMaxUploadSizeMiB, err := strconv.Atoi(maxUploadSetting); err == nil {
settingMaxUploadSizeBytes = settingMaxUploadSizeMiB * MebiByte
} else {
log.Warn("Failed to parse max upload size", zap.Error(err))
settingMaxUploadSizeBytes = 0
}
file, err := c.FormFile("file")
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to get uploading file").SetInternal(err)
}
if file == nil {
return echo.NewHTTPError(http.StatusBadRequest, "Upload file not found").SetInternal(err)
}
if file.Size > int64(settingMaxUploadSizeBytes) {
message := fmt.Sprintf("File size exceeds allowed limit of %d MiB", settingMaxUploadSizeBytes/MebiByte)
return echo.NewHTTPError(http.StatusBadRequest, message).SetInternal(err)
}
if err := c.Request().ParseMultipartForm(maxUploadBufferSizeBytes); err != nil {
return echo.NewHTTPError(http.StatusBadRequest, "Failed to parse upload data").SetInternal(err)
}
filetype := file.Header.Get("Content-Type")
size := file.Size
sourceFile, err := file.Open()
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to open file").SetInternal(err)
}
defer sourceFile.Close()
var resourceCreate *api.ResourceCreate
systemSettingStorageServiceID, err := s.Store.FindSystemSetting(ctx, &api.SystemSettingFind{Name: api.SystemSettingStorageServiceIDName})
if err != nil && common.ErrorCode(err) != common.NotFound {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to find storage").SetInternal(err)
}
storageServiceID := api.DatabaseStorage
if systemSettingStorageServiceID != nil {
err = json.Unmarshal([]byte(systemSettingStorageServiceID.Value), &storageServiceID)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to unmarshal storage service id").SetInternal(err)
}
}
publicID := common.GenUUID()
if storageServiceID == api.DatabaseStorage {
fileBytes, err := io.ReadAll(sourceFile)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to read file").SetInternal(err)
}
resourceCreate = &api.ResourceCreate{
CreatorID: userID,
Filename: file.Filename,
Type: filetype,
Size: size,
Blob: fileBytes,
}
} else if storageServiceID == api.LocalStorage {
// filepath.Join() should be used for local file paths,
// as it handles the os-specific path separator automatically.
// path.Join() always uses '/' as path separator.
systemSettingLocalStoragePath, err := s.Store.FindSystemSetting(ctx, &api.SystemSettingFind{Name: api.SystemSettingLocalStoragePathName})
if err != nil && common.ErrorCode(err) != common.NotFound {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to find local storage path setting").SetInternal(err)
}
localStoragePath := "assets/{timestamp}_{filename}"
if systemSettingLocalStoragePath != nil {
err = json.Unmarshal([]byte(systemSettingLocalStoragePath.Value), &localStoragePath)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to unmarshal local storage path setting").SetInternal(err)
}
}
filePath := filepath.FromSlash(localStoragePath)
if !strings.Contains(filePath, "{filename}") {
filePath = filepath.Join(filePath, "{filename}")
}
filePath = filepath.Join(s.Profile.Data, replacePathTemplate(filePath, file.Filename))
dir, filename := filepath.Split(filePath)
if err = os.MkdirAll(dir, os.ModePerm); err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create directory").SetInternal(err)
}
dst, err := os.Create(filePath)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create file").SetInternal(err)
}
defer dst.Close()
_, err = io.Copy(dst, sourceFile)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to copy file").SetInternal(err)
}
resourceCreate = &api.ResourceCreate{
CreatorID: userID,
Filename: filename,
Type: filetype,
Size: size,
InternalPath: filePath,
}
} else {
storage, err := s.Store.FindStorage(ctx, &api.StorageFind{ID: &storageServiceID})
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to find storage").SetInternal(err)
}
if storage.Type == api.StorageS3 {
s3Config := storage.Config.S3Config
s3Client, err := s3.NewClient(ctx, &s3.Config{
AccessKey: s3Config.AccessKey,
SecretKey: s3Config.SecretKey,
EndPoint: s3Config.EndPoint,
Region: s3Config.Region,
Bucket: s3Config.Bucket,
URLPrefix: s3Config.URLPrefix,
URLSuffix: s3Config.URLSuffix,
})
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to new s3 client").SetInternal(err)
}
filePath := s3Config.Path
if !strings.Contains(filePath, "{filename}") {
filePath = path.Join(filePath, "{filename}")
}
filePath = replacePathTemplate(filePath, file.Filename)
_, filename := filepath.Split(filePath)
link, err := s3Client.UploadFile(ctx, filePath, filetype, sourceFile)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to upload via s3 client").SetInternal(err)
}
resourceCreate = &api.ResourceCreate{
CreatorID: userID,
Filename: filename,
Type: filetype,
Size: size,
ExternalLink: link,
}
} else {
return echo.NewHTTPError(http.StatusInternalServerError, "Unsupported storage type")
}
}
resourceCreate.PublicID = publicID
resource, err := s.Store.CreateResource(ctx, resourceCreate)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create resource").SetInternal(err)
}
if err := s.createResourceCreateActivity(c, resource); err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to create activity").SetInternal(err)
}
return c.JSON(http.StatusOK, composeResponse(resource))
})
g.GET("/resource", func(c echo.Context) error {
ctx := c.Request().Context()
userID, ok := c.Get(getUserIDContextKey()).(int)
if !ok {
return echo.NewHTTPError(http.StatusUnauthorized, "Missing user in session")
}
resourceFind := &api.ResourceFind{
CreatorID: &userID,
}
if limit, err := strconv.Atoi(c.QueryParam("limit")); err == nil {
resourceFind.Limit = &limit
}
if offset, err := strconv.Atoi(c.QueryParam("offset")); err == nil {
resourceFind.Offset = &offset
}
list, err := s.Store.FindResourceList(ctx, resourceFind)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to fetch resource list").SetInternal(err)
}
return c.JSON(http.StatusOK, composeResponse(list))
})
g.PATCH("/resource/:resourceId", func(c echo.Context) error {
ctx := c.Request().Context()
userID, ok := c.Get(getUserIDContextKey()).(int)
if !ok {
return echo.NewHTTPError(http.StatusUnauthorized, "Missing user in session")
}
resourceID, err := strconv.Atoi(c.Param("resourceId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("ID is not a number: %s", c.Param("resourceId"))).SetInternal(err)
}
resourceFind := &api.ResourceFind{
ID: &resourceID,
}
resource, err := s.Store.FindResource(ctx, resourceFind)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to find resource").SetInternal(err)
}
if resource.CreatorID != userID {
return echo.NewHTTPError(http.StatusUnauthorized, "Unauthorized")
}
currentTs := time.Now().Unix()
resourcePatch := &api.ResourcePatch{
UpdatedTs: &currentTs,
}
if err := json.NewDecoder(c.Request().Body).Decode(resourcePatch); err != nil {
return echo.NewHTTPError(http.StatusBadRequest, "Malformatted patch resource request").SetInternal(err)
}
if resourcePatch.ResetPublicID != nil && *resourcePatch.ResetPublicID {
publicID := common.GenUUID()
resourcePatch.PublicID = &publicID
}
resourcePatch.ID = resourceID
resource, err = s.Store.PatchResource(ctx, resourcePatch)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to patch resource").SetInternal(err)
}
return c.JSON(http.StatusOK, composeResponse(resource))
})
g.DELETE("/resource/:resourceId", func(c echo.Context) error {
ctx := c.Request().Context()
userID, ok := c.Get(getUserIDContextKey()).(int)
if !ok {
return echo.NewHTTPError(http.StatusUnauthorized, "Missing user in session")
}
resourceID, err := strconv.Atoi(c.Param("resourceId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("ID is not a number: %s", c.Param("resourceId"))).SetInternal(err)
}
resource, err := s.Store.FindResource(ctx, &api.ResourceFind{
ID: &resourceID,
CreatorID: &userID,
})
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to find resource").SetInternal(err)
}
if resource.CreatorID != userID {
return echo.NewHTTPError(http.StatusUnauthorized, "Unauthorized")
}
if resource.InternalPath != "" {
if err := os.Remove(resource.InternalPath); err != nil {
log.Warn(fmt.Sprintf("failed to delete local file with path %s", resource.InternalPath), zap.Error(err))
}
thumbnailPath := path.Join(s.Profile.Data, thumbnailImagePath, resource.PublicID)
if err := os.Remove(thumbnailPath); err != nil {
log.Warn(fmt.Sprintf("failed to delete local thumbnail with path %s", thumbnailPath), zap.Error(err))
}
}
resourceDelete := &api.ResourceDelete{
ID: resourceID,
}
if err := s.Store.DeleteResource(ctx, resourceDelete); err != nil {
if common.ErrorCode(err) == common.NotFound {
return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("Resource ID not found: %d", resourceID))
}
return echo.NewHTTPError(http.StatusInternalServerError, "Failed to delete resource").SetInternal(err)
}
return c.JSON(http.StatusOK, true)
})
}
func (s *Server) registerResourcePublicRoutes(g *echo.Group) {
// (DEPRECATED) use /r/:resourceId/:publicId/:filename instead.
g.GET("/r/:resourceId/:publicId", func(c echo.Context) error {
ctx := c.Request().Context()
resourceID, err := strconv.Atoi(c.Param("resourceId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("ID is not a number: %s", c.Param("resourceId"))).SetInternal(err)
}
publicID, err := url.QueryUnescape(c.Param("publicId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("publicID is invalid: %s", c.Param("publicId"))).SetInternal(err)
}
resourceFind := &api.ResourceFind{
ID: &resourceID,
PublicID: &publicID,
GetBlob: true,
}
resource, err := s.Store.FindResource(ctx, resourceFind)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to find resource by ID: %v", resourceID)).SetInternal(err)
}
blob := resource.Blob
if resource.InternalPath != "" {
src, err := os.Open(resource.InternalPath)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to open the local resource: %s", resource.InternalPath)).SetInternal(err)
}
defer src.Close()
blob, err = io.ReadAll(src)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to read the local resource: %s", resource.InternalPath)).SetInternal(err)
}
}
c.Response().Writer.Header().Set(echo.HeaderCacheControl, "max-age=31536000, immutable")
c.Response().Writer.Header().Set(echo.HeaderContentSecurityPolicy, "default-src 'self'")
resourceType := strings.ToLower(resource.Type)
if strings.HasPrefix(resourceType, "text") {
resourceType = echo.MIMETextPlainCharsetUTF8
} else if strings.HasPrefix(resourceType, "video") || strings.HasPrefix(resourceType, "audio") {
http.ServeContent(c.Response(), c.Request(), resource.Filename, time.Unix(resource.UpdatedTs, 0), bytes.NewReader(blob))
return nil
}
return c.Stream(http.StatusOK, resourceType, bytes.NewReader(blob))
})
g.GET("/r/:resourceId/:publicId/:filename", func(c echo.Context) error {
ctx := c.Request().Context()
resourceID, err := strconv.Atoi(c.Param("resourceId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("ID is not a number: %s", c.Param("resourceId"))).SetInternal(err)
}
publicID, err := url.QueryUnescape(c.Param("publicId"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("publicID is invalid: %s", c.Param("publicId"))).SetInternal(err)
}
filename, err := url.QueryUnescape(c.Param("filename"))
if err != nil {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("filename is invalid: %s", c.Param("filename"))).SetInternal(err)
}
resourceFind := &api.ResourceFind{
ID: &resourceID,
PublicID: &publicID,
Filename: &filename,
GetBlob: true,
}
resource, err := s.Store.FindResource(ctx, resourceFind)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to find resource by ID: %v", resourceID)).SetInternal(err)
}
blob := resource.Blob
if resource.InternalPath != "" {
resourcePath := resource.InternalPath
src, err := os.Open(resourcePath)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to open the local resource: %s", resourcePath)).SetInternal(err)
}
defer src.Close()
blob, err = io.ReadAll(src)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to read the local resource: %s", resourcePath)).SetInternal(err)
}
}
if c.QueryParam("thumbnail") == "1" && common.HasPrefixes(resource.Type, "image/png", "image/jpeg") {
ext := filepath.Ext(filename)
thumbnailPath := path.Join(s.Profile.Data, thumbnailImagePath, resource.PublicID+ext)
thumbnailBlob, err := getOrGenerateThumbnailImage(blob, thumbnailPath)
if err != nil {
log.Warn(fmt.Sprintf("failed to get or generate local thumbnail with path %s", thumbnailPath), zap.Error(err))
} else {
blob = thumbnailBlob
}
}
c.Response().Writer.Header().Set(echo.HeaderCacheControl, "max-age=31536000, immutable")
c.Response().Writer.Header().Set(echo.HeaderContentSecurityPolicy, "default-src 'self'")
resourceType := strings.ToLower(resource.Type)
if strings.HasPrefix(resourceType, "text") {
resourceType = echo.MIMETextPlainCharsetUTF8
} else if strings.HasPrefix(resourceType, "video") || strings.HasPrefix(resourceType, "audio") {
http.ServeContent(c.Response(), c.Request(), resource.Filename, time.Unix(resource.UpdatedTs, 0), bytes.NewReader(blob))
return nil
}
return c.Stream(http.StatusOK, resourceType, bytes.NewReader(blob))
})
}
func (s *Server) createResourceCreateActivity(c echo.Context, resource *api.Resource) error {
ctx := c.Request().Context()
payload := api.ActivityResourceCreatePayload{
Filename: resource.Filename,
Type: resource.Type,
Size: resource.Size,
}
payloadBytes, err := json.Marshal(payload)
if err != nil {
return errors.Wrap(err, "failed to marshal activity payload")
}
activity, err := s.Store.CreateActivity(ctx, &api.ActivityCreate{
CreatorID: resource.CreatorID,
Type: api.ActivityResourceCreate,
Level: api.ActivityInfo,
Payload: string(payloadBytes),
})
if err != nil || activity == nil {
return errors.Wrap(err, "failed to create activity")
}
return err
}
func replacePathTemplate(path string, filename string) string {
t := time.Now()
path = fileKeyPattern.ReplaceAllStringFunc(path, func(s string) string {
switch s {
case "{filename}":
return filename
case "{timestamp}":
return fmt.Sprintf("%d", t.Unix())
case "{year}":
return fmt.Sprintf("%d", t.Year())
case "{month}":
return fmt.Sprintf("%02d", t.Month())
case "{day}":
return fmt.Sprintf("%02d", t.Day())
case "{hour}":
return fmt.Sprintf("%02d", t.Hour())
case "{minute}":
return fmt.Sprintf("%02d", t.Minute())
case "{second}":
return fmt.Sprintf("%02d", t.Second())
}
return s
})
return path
}
var availableGeneratorAmount int32 = 32
func getOrGenerateThumbnailImage(srcBlob []byte, dstPath string) ([]byte, error) {
if _, err := os.Stat(dstPath); err != nil {
if !errors.Is(err, os.ErrNotExist) {
return nil, errors.Wrap(err, "failed to check thumbnail image stat")
}
if atomic.LoadInt32(&availableGeneratorAmount) <= 0 {
return nil, errors.New("not enough available generator amount")
}
atomic.AddInt32(&availableGeneratorAmount, -1)
defer func() {
atomic.AddInt32(&availableGeneratorAmount, 1)
}()
reader := bytes.NewReader(srcBlob)
src, err := imaging.Decode(reader)
if err != nil {
return nil, errors.Wrap(err, "failed to decode thumbnail image")
}
thumbnailImage := imaging.Resize(src, 512, 0, imaging.Lanczos)
dstDir := path.Dir(dstPath)
if err := os.MkdirAll(dstDir, os.ModePerm); err != nil {
return nil, errors.Wrap(err, "failed to create thumbnail dir")
}
if err := imaging.Save(thumbnailImage, dstPath); err != nil {
return nil, errors.Wrap(err, "failed to resize thumbnail image")
}
}
dstFile, err := os.Open(dstPath)
if err != nil {
return nil, errors.Wrap(err, "failed to open the local resource")
}
defer dstFile.Close()
dstBlob, err := io.ReadAll(dstFile)
if err != nil {
return nil, errors.Wrap(err, "failed to read the local resource")
}
return dstBlob, nil
}