package api import ( "encoding/json" "fmt" "net/http" "path/filepath" "time" "github.com/gin-gonic/gin" "github.com/photoprism/photoprism/internal/config" "github.com/photoprism/photoprism/internal/photoprism" "github.com/photoprism/photoprism/internal/query" "github.com/photoprism/photoprism/internal/service" "github.com/photoprism/photoprism/internal/thumb" "github.com/photoprism/photoprism/pkg/fs" "github.com/photoprism/photoprism/pkg/txt" ) type ThumbCache struct { FileName string ShareName string } type ByteCache struct { Data []byte } // GET /api/v1/t/:hash/:token/:type // // Parameters: // hash: string The file hash as returned by the search API // type: string Thumbnail type, see photoprism.ThumbnailTypes func GetThumbnail(router *gin.RouterGroup, conf *config.Config) { router.GET("/t/:hash/:token/:type", func(c *gin.Context) { if InvalidToken(c, conf) { c.Data(http.StatusForbidden, "image/svg+xml", brokenIconSvg) return } start := time.Now() fileHash := c.Param("hash") typeName := c.Param("type") thumbType, ok := thumb.Types[typeName] if !ok { log.Errorf("thumbnail: invalid type %s", txt.Quote(typeName)) c.Data(http.StatusOK, "image/svg+xml", photoIconSvg) return } cache := service.Cache() cacheKey := fmt.Sprintf("thumbnail:%s:%s", fileHash, typeName) if cacheData, err := cache.Get(cacheKey); err == nil { log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start)) var cached ThumbCache if err := json.Unmarshal(cacheData, &cached); err != nil { log.Errorf("thumbnail: %s not found", fileHash) c.Data(http.StatusOK, "image/svg+xml", albumIconSvg) return } if !fs.FileExists(cached.FileName) { log.Errorf("thumbnail: %s not found", fileHash) c.Data(http.StatusOK, "image/svg+xml", brokenIconSvg) return } if c.Query("download") != "" { c.FileAttachment(cached.FileName, cached.ShareName) } else { c.File(cached.FileName) } return } f, err := query.FileByHash(fileHash) if err != nil { c.Data(http.StatusOK, "image/svg+xml", photoIconSvg) return } // Find fallback if file is not a JPEG image. if f.NoJPEG() { f, err = query.FileByPhotoUID(f.PhotoUID) if err != nil { c.Data(http.StatusOK, "image/svg+xml", fileIconSvg) return } } // Return SVG icon as placeholder if file has errors. if f.FileError != "" { c.Data(http.StatusOK, "image/svg+xml", brokenIconSvg) return } fileName := photoprism.FileName(f.FileRoot, f.FileName) if !fs.FileExists(fileName) { log.Errorf("thumbnail: file %s is missing", txt.Quote(f.FileName)) c.Data(http.StatusOK, "image/svg+xml", brokenIconSvg) // Set missing flag so that the file doesn't show up in search results anymore. logError("thumbnail", f.Update("FileMissing", true)) if f.AllFilesMissing() { log.Infof("thumbnail: deleting photo, all files missing for %s", txt.Quote(f.FileName)) logError("thumbnail", f.RelatedPhoto().Delete(false)) } return } // Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157 if thumbType.ExceedsLimit() && c.Query("download") == "" { log.Debugf("thumbnail: using original, size exceeds limit (width %d, height %d)", thumbType.Width, thumbType.Height) c.File(fileName) return } var thumbnail string if conf.ThumbUncached() || thumbType.OnDemand() { thumbnail, err = thumb.FromFile(fileName, f.FileHash, conf.ThumbPath(), thumbType.Width, thumbType.Height, thumbType.Options...) } else { thumbnail, err = thumb.FromCache(fileName, f.FileHash, conf.ThumbPath(), thumbType.Width, thumbType.Height, thumbType.Options...) } if err != nil { log.Errorf("thumbnail: %s", err) c.Data(http.StatusOK, "image/svg+xml", brokenIconSvg) return } else if thumbnail == "" { log.Errorf("thumbnail: %s has empty thumb name - bug?", filepath.Base(fileName)) c.Data(http.StatusOK, "image/svg+xml", brokenIconSvg) return } // Cache thumbnail filename. if cached, err := json.Marshal(ThumbCache{thumbnail, f.ShareFileName()}); err == nil { logError("thumbnail", cache.Set(cacheKey, cached)) log.Debugf("cached %s [%s]", cacheKey, time.Since(start)) } if c.Query("download") != "" { c.FileAttachment(thumbnail, f.ShareFileName()) } else { c.File(thumbnail) } }) }