26d10212c6
Add ApplyToContext and AuthenticateToUser helpers to the auth package, then remove the duplicated auth code spread across the MCP middleware, file server, Connect interceptor, and gRPC-Gateway middleware. - auth.ApplyToContext: single place to set claims/user into context after Authenticate() - auth.AuthenticateToUser: resolves any credential (bearer token or refresh cookie) to a *store.User - MCP middleware: replaced manual PAT DB lookup + expiry check with Authenticator.AuthenticateByPAT - File server: replaced authenticateByBearerToken/authenticateByRefreshToken with AuthenticateToUser - Connect interceptor + Gateway middleware: replaced duplicated context-setting block with ApplyToContext - MCPService now accepts secret to construct its own Authenticator
587 lines
20 KiB
Go
587 lines
20 KiB
Go
package fileserver
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"io"
|
|
"log/slog"
|
|
"net/http"
|
|
"os"
|
|
"path/filepath"
|
|
"regexp"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/disintegration/imaging"
|
|
"github.com/labstack/echo/v5"
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/sync/semaphore"
|
|
|
|
"github.com/usememos/memos/internal/profile"
|
|
"github.com/usememos/memos/internal/util"
|
|
"github.com/usememos/memos/plugin/storage/s3"
|
|
storepb "github.com/usememos/memos/proto/gen/store"
|
|
"github.com/usememos/memos/server/auth"
|
|
"github.com/usememos/memos/store"
|
|
)
|
|
|
|
// Constants for file serving configuration.
|
|
const (
|
|
// ThumbnailCacheFolder is the folder name where thumbnail images are stored.
|
|
ThumbnailCacheFolder = ".thumbnail_cache"
|
|
|
|
// thumbnailMaxSize is the maximum dimension (width or height) for thumbnails.
|
|
thumbnailMaxSize = 600
|
|
|
|
// maxConcurrentThumbnails limits concurrent thumbnail generation to prevent memory exhaustion.
|
|
maxConcurrentThumbnails = 3
|
|
|
|
// cacheMaxAge is the max-age value for Cache-Control headers (1 hour).
|
|
cacheMaxAge = "public, max-age=3600"
|
|
)
|
|
|
|
// xssUnsafeTypes contains MIME types that could execute scripts if served directly.
|
|
// These are served as application/octet-stream to prevent XSS attacks.
|
|
var xssUnsafeTypes = map[string]bool{
|
|
"text/html": true,
|
|
"text/javascript": true,
|
|
"application/javascript": true,
|
|
"application/x-javascript": true,
|
|
"text/xml": true,
|
|
"application/xml": true,
|
|
"application/xhtml+xml": true,
|
|
"image/svg+xml": true,
|
|
}
|
|
|
|
// thumbnailSupportedTypes contains image MIME types that support thumbnail generation.
|
|
var thumbnailSupportedTypes = map[string]bool{
|
|
"image/png": true,
|
|
"image/jpeg": true,
|
|
"image/heic": true,
|
|
"image/heif": true,
|
|
"image/webp": true,
|
|
}
|
|
|
|
// avatarAllowedTypes contains MIME types allowed for user avatars.
|
|
var avatarAllowedTypes = map[string]bool{
|
|
"image/png": true,
|
|
"image/jpeg": true,
|
|
"image/jpg": true,
|
|
"image/gif": true,
|
|
"image/webp": true,
|
|
"image/heic": true,
|
|
"image/heif": true,
|
|
}
|
|
|
|
// SupportedThumbnailMimeTypes is the exported list of thumbnail-supported MIME types.
|
|
var SupportedThumbnailMimeTypes = []string{
|
|
"image/png",
|
|
"image/jpeg",
|
|
"image/heic",
|
|
"image/heif",
|
|
"image/webp",
|
|
}
|
|
|
|
// dataURIRegex parses data URI format: data:image/png;base64,iVBORw0KGgo...
|
|
var dataURIRegex = regexp.MustCompile(`^data:(?P<type>[^;]+);base64,(?P<base64>.+)`)
|
|
|
|
// FileServerService handles HTTP file serving with proper range request support.
|
|
type FileServerService struct {
|
|
Profile *profile.Profile
|
|
Store *store.Store
|
|
authenticator *auth.Authenticator
|
|
|
|
// thumbnailSemaphore limits concurrent thumbnail generation.
|
|
thumbnailSemaphore *semaphore.Weighted
|
|
}
|
|
|
|
// NewFileServerService creates a new file server service.
|
|
func NewFileServerService(profile *profile.Profile, store *store.Store, secret string) *FileServerService {
|
|
return &FileServerService{
|
|
Profile: profile,
|
|
Store: store,
|
|
authenticator: auth.NewAuthenticator(store, secret),
|
|
thumbnailSemaphore: semaphore.NewWeighted(maxConcurrentThumbnails),
|
|
}
|
|
}
|
|
|
|
// RegisterRoutes registers HTTP file serving routes.
|
|
func (s *FileServerService) RegisterRoutes(echoServer *echo.Echo) {
|
|
fileGroup := echoServer.Group("/file")
|
|
fileGroup.GET("/attachments/:uid/:filename", s.serveAttachmentFile)
|
|
fileGroup.GET("/users/:identifier/avatar", s.serveUserAvatar)
|
|
}
|
|
|
|
// =============================================================================
|
|
// HTTP Handlers
|
|
// =============================================================================
|
|
|
|
// serveAttachmentFile serves attachment binary content using native HTTP.
|
|
func (s *FileServerService) serveAttachmentFile(c *echo.Context) error {
|
|
ctx := c.Request().Context()
|
|
uid := c.Param("uid")
|
|
wantThumbnail := c.QueryParam("thumbnail") == "true"
|
|
|
|
attachment, err := s.Store.GetAttachment(ctx, &store.FindAttachment{
|
|
UID: &uid,
|
|
GetBlob: true,
|
|
})
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to get attachment").Wrap(err)
|
|
}
|
|
if attachment == nil {
|
|
return echo.NewHTTPError(http.StatusNotFound, "attachment not found")
|
|
}
|
|
|
|
if err := s.checkAttachmentPermission(ctx, c, attachment); err != nil {
|
|
return err
|
|
}
|
|
|
|
contentType := s.sanitizeContentType(attachment.Type)
|
|
|
|
// Stream video/audio to avoid loading entire file into memory.
|
|
if isMediaType(attachment.Type) {
|
|
return s.serveMediaStream(c, attachment, contentType)
|
|
}
|
|
|
|
return s.serveStaticFile(c, attachment, contentType, wantThumbnail)
|
|
}
|
|
|
|
// serveUserAvatar serves user avatar images.
|
|
func (s *FileServerService) serveUserAvatar(c *echo.Context) error {
|
|
ctx := c.Request().Context()
|
|
identifier := c.Param("identifier")
|
|
|
|
user, err := s.getUserByIdentifier(ctx, identifier)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to get user").Wrap(err)
|
|
}
|
|
if user == nil {
|
|
return echo.NewHTTPError(http.StatusNotFound, "user not found")
|
|
}
|
|
if user.AvatarURL == "" {
|
|
return echo.NewHTTPError(http.StatusNotFound, "avatar not found")
|
|
}
|
|
|
|
imageType, imageData, err := s.parseDataURI(user.AvatarURL)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to parse avatar data").Wrap(err)
|
|
}
|
|
|
|
if !avatarAllowedTypes[imageType] {
|
|
return echo.NewHTTPError(http.StatusBadRequest, "invalid avatar image type")
|
|
}
|
|
|
|
setSecurityHeaders(c)
|
|
c.Response().Header().Set(echo.HeaderContentType, imageType)
|
|
c.Response().Header().Set(echo.HeaderCacheControl, cacheMaxAge)
|
|
|
|
return c.Blob(http.StatusOK, imageType, imageData)
|
|
}
|
|
|
|
// =============================================================================
|
|
// File Serving Methods
|
|
// =============================================================================
|
|
|
|
// serveMediaStream serves video/audio files using streaming to avoid memory exhaustion.
|
|
func (s *FileServerService) serveMediaStream(c *echo.Context, attachment *store.Attachment, contentType string) error {
|
|
setSecurityHeaders(c)
|
|
setMediaHeaders(c, contentType, attachment.Type)
|
|
|
|
switch attachment.StorageType {
|
|
case storepb.AttachmentStorageType_LOCAL:
|
|
filePath, err := s.resolveLocalPath(attachment.Reference)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to resolve file path").Wrap(err)
|
|
}
|
|
http.ServeFile(c.Response(), c.Request(), filePath)
|
|
return nil
|
|
|
|
case storepb.AttachmentStorageType_S3:
|
|
presignURL, err := s.getS3PresignedURL(c.Request().Context(), attachment)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to generate presigned URL").Wrap(err)
|
|
}
|
|
return c.Redirect(http.StatusTemporaryRedirect, presignURL)
|
|
|
|
default:
|
|
// Database storage fallback.
|
|
modTime := time.Unix(attachment.UpdatedTs, 0)
|
|
http.ServeContent(c.Response(), c.Request(), attachment.Filename, modTime, bytes.NewReader(attachment.Blob))
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// serveStaticFile serves non-streaming files (images, documents, etc.).
|
|
func (s *FileServerService) serveStaticFile(c *echo.Context, attachment *store.Attachment, contentType string, wantThumbnail bool) error {
|
|
blob, err := s.getAttachmentBlob(attachment)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to get attachment blob").Wrap(err)
|
|
}
|
|
|
|
// Generate thumbnail for supported image types.
|
|
if wantThumbnail && thumbnailSupportedTypes[attachment.Type] {
|
|
if thumbnailBlob, err := s.getOrGenerateThumbnail(c.Request().Context(), attachment); err != nil {
|
|
slog.Warn("failed to get thumbnail", "error", err)
|
|
} else {
|
|
blob = thumbnailBlob
|
|
}
|
|
}
|
|
|
|
setSecurityHeaders(c)
|
|
setMediaHeaders(c, contentType, attachment.Type)
|
|
|
|
// Force download for non-media files to prevent XSS execution.
|
|
if !strings.HasPrefix(contentType, "image/") && contentType != "application/pdf" {
|
|
c.Response().Header().Set(echo.HeaderContentDisposition, fmt.Sprintf("attachment; filename=%q", attachment.Filename))
|
|
}
|
|
|
|
return c.Blob(http.StatusOK, contentType, blob)
|
|
}
|
|
|
|
// =============================================================================
|
|
// Storage Operations
|
|
// =============================================================================
|
|
|
|
// getAttachmentBlob retrieves the binary content of an attachment from storage.
|
|
func (s *FileServerService) getAttachmentBlob(attachment *store.Attachment) ([]byte, error) {
|
|
switch attachment.StorageType {
|
|
case storepb.AttachmentStorageType_LOCAL:
|
|
return s.readLocalFile(attachment.Reference)
|
|
|
|
case storepb.AttachmentStorageType_S3:
|
|
return s.downloadFromS3(attachment)
|
|
|
|
default:
|
|
return attachment.Blob, nil
|
|
}
|
|
}
|
|
|
|
// getAttachmentReader returns a reader for streaming attachment content.
|
|
func (s *FileServerService) getAttachmentReader(attachment *store.Attachment) (io.ReadCloser, error) {
|
|
switch attachment.StorageType {
|
|
case storepb.AttachmentStorageType_LOCAL:
|
|
filePath, err := s.resolveLocalPath(attachment.Reference)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
file, err := os.Open(filePath)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
return nil, errors.Wrap(err, "file not found")
|
|
}
|
|
return nil, errors.Wrap(err, "failed to open file")
|
|
}
|
|
return file, nil
|
|
|
|
case storepb.AttachmentStorageType_S3:
|
|
s3Client, s3Object, err := s.createS3Client(attachment)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
reader, err := s3Client.GetObjectStream(context.Background(), s3Object.Key)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "failed to stream from S3")
|
|
}
|
|
return reader, nil
|
|
|
|
default:
|
|
return io.NopCloser(bytes.NewReader(attachment.Blob)), nil
|
|
}
|
|
}
|
|
|
|
// resolveLocalPath converts a storage reference to an absolute file path.
|
|
func (s *FileServerService) resolveLocalPath(reference string) (string, error) {
|
|
filePath := filepath.FromSlash(reference)
|
|
if !filepath.IsAbs(filePath) {
|
|
filePath = filepath.Join(s.Profile.Data, filePath)
|
|
}
|
|
return filePath, nil
|
|
}
|
|
|
|
// readLocalFile reads the entire contents of a local file.
|
|
func (s *FileServerService) readLocalFile(reference string) ([]byte, error) {
|
|
filePath, err := s.resolveLocalPath(reference)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
file, err := os.Open(filePath)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
return nil, errors.Wrap(err, "file not found")
|
|
}
|
|
return nil, errors.Wrap(err, "failed to open file")
|
|
}
|
|
defer file.Close()
|
|
|
|
blob, err := io.ReadAll(file)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "failed to read file")
|
|
}
|
|
return blob, nil
|
|
}
|
|
|
|
// createS3Client creates an S3 client from attachment payload.
|
|
func (*FileServerService) createS3Client(attachment *store.Attachment) (*s3.Client, *storepb.AttachmentPayload_S3Object, error) {
|
|
if attachment.Payload == nil {
|
|
return nil, nil, errors.New("attachment payload is missing")
|
|
}
|
|
s3Object := attachment.Payload.GetS3Object()
|
|
if s3Object == nil {
|
|
return nil, nil, errors.New("S3 object payload is missing")
|
|
}
|
|
if s3Object.S3Config == nil {
|
|
return nil, nil, errors.New("S3 config is missing")
|
|
}
|
|
if s3Object.Key == "" {
|
|
return nil, nil, errors.New("S3 object key is missing")
|
|
}
|
|
|
|
client, err := s3.NewClient(context.Background(), s3Object.S3Config)
|
|
if err != nil {
|
|
return nil, nil, errors.Wrap(err, "failed to create S3 client")
|
|
}
|
|
return client, s3Object, nil
|
|
}
|
|
|
|
// downloadFromS3 downloads the entire object from S3.
|
|
func (s *FileServerService) downloadFromS3(attachment *store.Attachment) ([]byte, error) {
|
|
client, s3Object, err := s.createS3Client(attachment)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
blob, err := client.GetObject(context.Background(), s3Object.Key)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "failed to download from S3")
|
|
}
|
|
return blob, nil
|
|
}
|
|
|
|
// getS3PresignedURL generates a presigned URL for direct S3 access.
|
|
func (s *FileServerService) getS3PresignedURL(ctx context.Context, attachment *store.Attachment) (string, error) {
|
|
client, s3Object, err := s.createS3Client(attachment)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
url, err := client.PresignGetObject(ctx, s3Object.Key)
|
|
if err != nil {
|
|
return "", errors.Wrap(err, "failed to presign URL")
|
|
}
|
|
return url, nil
|
|
}
|
|
|
|
// =============================================================================
|
|
// Thumbnail Generation
|
|
// =============================================================================
|
|
|
|
// getOrGenerateThumbnail returns the thumbnail image of the attachment.
|
|
// Uses semaphore to limit concurrent thumbnail generation and prevent memory exhaustion.
|
|
func (s *FileServerService) getOrGenerateThumbnail(ctx context.Context, attachment *store.Attachment) ([]byte, error) {
|
|
thumbnailPath, err := s.getThumbnailPath(attachment)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Fast path: return cached thumbnail if exists.
|
|
if blob, err := s.readCachedThumbnail(thumbnailPath); err == nil {
|
|
return blob, nil
|
|
}
|
|
|
|
// Acquire semaphore to limit concurrent generation.
|
|
if err := s.thumbnailSemaphore.Acquire(ctx, 1); err != nil {
|
|
return nil, errors.Wrap(err, "failed to acquire semaphore")
|
|
}
|
|
defer s.thumbnailSemaphore.Release(1)
|
|
|
|
// Double-check after acquiring semaphore (another goroutine may have generated it).
|
|
if blob, err := s.readCachedThumbnail(thumbnailPath); err == nil {
|
|
return blob, nil
|
|
}
|
|
|
|
return s.generateThumbnail(attachment, thumbnailPath)
|
|
}
|
|
|
|
// getThumbnailPath returns the file path for a cached thumbnail.
|
|
func (s *FileServerService) getThumbnailPath(attachment *store.Attachment) (string, error) {
|
|
cacheFolder := filepath.Join(s.Profile.Data, ThumbnailCacheFolder)
|
|
if err := os.MkdirAll(cacheFolder, os.ModePerm); err != nil {
|
|
return "", errors.Wrap(err, "failed to create thumbnail cache folder")
|
|
}
|
|
filename := fmt.Sprintf("%d%s", attachment.ID, filepath.Ext(attachment.Filename))
|
|
return filepath.Join(cacheFolder, filename), nil
|
|
}
|
|
|
|
// readCachedThumbnail reads a thumbnail from the cache directory.
|
|
func (*FileServerService) readCachedThumbnail(path string) ([]byte, error) {
|
|
file, err := os.Open(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
return io.ReadAll(file)
|
|
}
|
|
|
|
// generateThumbnail creates a new thumbnail and saves it to disk.
|
|
func (s *FileServerService) generateThumbnail(attachment *store.Attachment, thumbnailPath string) ([]byte, error) {
|
|
reader, err := s.getAttachmentReader(attachment)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "failed to get attachment reader")
|
|
}
|
|
defer reader.Close()
|
|
|
|
img, err := imaging.Decode(reader, imaging.AutoOrientation(true))
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "failed to decode image")
|
|
}
|
|
|
|
width, height := img.Bounds().Dx(), img.Bounds().Dy()
|
|
thumbnailWidth, thumbnailHeight := calculateThumbnailDimensions(width, height)
|
|
|
|
thumbnailImage := imaging.Resize(img, thumbnailWidth, thumbnailHeight, imaging.Lanczos)
|
|
|
|
if err := imaging.Save(thumbnailImage, thumbnailPath); err != nil {
|
|
return nil, errors.Wrap(err, "failed to save thumbnail")
|
|
}
|
|
|
|
return s.readCachedThumbnail(thumbnailPath)
|
|
}
|
|
|
|
// calculateThumbnailDimensions calculates the target dimensions for a thumbnail.
|
|
// The largest dimension is constrained to thumbnailMaxSize while maintaining aspect ratio.
|
|
// Small images are not enlarged.
|
|
func calculateThumbnailDimensions(width, height int) (int, int) {
|
|
if max(width, height) <= thumbnailMaxSize {
|
|
return width, height
|
|
}
|
|
if width >= height {
|
|
return thumbnailMaxSize, 0 // Landscape: constrain width.
|
|
}
|
|
return 0, thumbnailMaxSize // Portrait: constrain height.
|
|
}
|
|
|
|
// =============================================================================
|
|
// Authentication & Authorization
|
|
// =============================================================================
|
|
|
|
// checkAttachmentPermission verifies the user has permission to access the attachment.
|
|
func (s *FileServerService) checkAttachmentPermission(ctx context.Context, c *echo.Context, attachment *store.Attachment) error {
|
|
// For unlinked attachments, only the creator can access.
|
|
if attachment.MemoID == nil {
|
|
user, err := s.getCurrentUser(ctx, c)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to get current user").Wrap(err)
|
|
}
|
|
if user == nil {
|
|
return echo.NewHTTPError(http.StatusUnauthorized, "unauthorized access")
|
|
}
|
|
if user.ID != attachment.CreatorID && user.Role != store.RoleAdmin {
|
|
return echo.NewHTTPError(http.StatusForbidden, "forbidden access")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
memo, err := s.Store.GetMemo(ctx, &store.FindMemo{ID: attachment.MemoID})
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to find memo").Wrap(err)
|
|
}
|
|
if memo == nil {
|
|
return echo.NewHTTPError(http.StatusNotFound, "memo not found")
|
|
}
|
|
|
|
if memo.Visibility == store.Public {
|
|
return nil
|
|
}
|
|
|
|
user, err := s.getCurrentUser(ctx, c)
|
|
if err != nil {
|
|
return echo.NewHTTPError(http.StatusInternalServerError, "failed to get current user").Wrap(err)
|
|
}
|
|
if user == nil {
|
|
return echo.NewHTTPError(http.StatusUnauthorized, "unauthorized access")
|
|
}
|
|
|
|
if memo.Visibility == store.Private && user.ID != memo.CreatorID && user.Role != store.RoleAdmin {
|
|
return echo.NewHTTPError(http.StatusForbidden, "forbidden access")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// getCurrentUser retrieves the current authenticated user from the request.
|
|
// Authentication priority: Bearer token (Access Token V2 or PAT) > Refresh token cookie.
|
|
func (s *FileServerService) getCurrentUser(ctx context.Context, c *echo.Context) (*store.User, error) {
|
|
authHeader := c.Request().Header.Get(echo.HeaderAuthorization)
|
|
cookieHeader := c.Request().Header.Get("Cookie")
|
|
return s.authenticator.AuthenticateToUser(ctx, authHeader, cookieHeader)
|
|
}
|
|
|
|
// getUserByIdentifier finds a user by either ID or username.
|
|
func (s *FileServerService) getUserByIdentifier(ctx context.Context, identifier string) (*store.User, error) {
|
|
if userID, err := util.ConvertStringToInt32(identifier); err == nil {
|
|
return s.Store.GetUser(ctx, &store.FindUser{ID: &userID})
|
|
}
|
|
return s.Store.GetUser(ctx, &store.FindUser{Username: &identifier})
|
|
}
|
|
|
|
// =============================================================================
|
|
// Helper Functions
|
|
// =============================================================================
|
|
|
|
// sanitizeContentType converts potentially dangerous MIME types to safe alternatives.
|
|
func (*FileServerService) sanitizeContentType(mimeType string) string {
|
|
contentType := mimeType
|
|
if strings.HasPrefix(contentType, "text/") {
|
|
contentType += "; charset=utf-8"
|
|
}
|
|
// Normalize for case-insensitive lookup.
|
|
if xssUnsafeTypes[strings.ToLower(mimeType)] {
|
|
return "application/octet-stream"
|
|
}
|
|
return contentType
|
|
}
|
|
|
|
// parseDataURI extracts MIME type and decoded data from a data URI.
|
|
func (*FileServerService) parseDataURI(dataURI string) (string, []byte, error) {
|
|
matches := dataURIRegex.FindStringSubmatch(dataURI)
|
|
if len(matches) != 3 {
|
|
return "", nil, errors.New("invalid data URI format")
|
|
}
|
|
|
|
imageType := matches[1]
|
|
imageData, err := base64.StdEncoding.DecodeString(matches[2])
|
|
if err != nil {
|
|
return "", nil, errors.Wrap(err, "failed to decode base64 data")
|
|
}
|
|
|
|
return imageType, imageData, nil
|
|
}
|
|
|
|
// isMediaType checks if the MIME type is video or audio.
|
|
func isMediaType(mimeType string) bool {
|
|
return strings.HasPrefix(mimeType, "video/") || strings.HasPrefix(mimeType, "audio/")
|
|
}
|
|
|
|
// setSecurityHeaders sets common security headers for all responses.
|
|
func setSecurityHeaders(c *echo.Context) {
|
|
h := c.Response().Header()
|
|
h.Set("X-Content-Type-Options", "nosniff")
|
|
h.Set("X-Frame-Options", "DENY")
|
|
h.Set("Content-Security-Policy", "default-src 'none'; style-src 'unsafe-inline';")
|
|
}
|
|
|
|
// setMediaHeaders sets headers for media file responses.
|
|
func setMediaHeaders(c *echo.Context, contentType, originalType string) {
|
|
h := c.Response().Header()
|
|
h.Set(echo.HeaderContentType, contentType)
|
|
h.Set(echo.HeaderCacheControl, cacheMaxAge)
|
|
|
|
// Support HDR/wide color gamut for images and videos.
|
|
if strings.HasPrefix(originalType, "image/") || strings.HasPrefix(originalType, "video/") {
|
|
h.Set("Color-Gamut", "srgb, p3, rec2020")
|
|
}
|
|
}
|