photoprism/internal/api/photo_thumbnail.go
Michael Mayer dd442ab9e9 Add moments #154
Signed-off-by: Michael Mayer <michael@liquidbytes.net>
2020-05-30 01:41:47 +02:00

162 lines
4.3 KiB
Go

package api
import (
"encoding/json"
"fmt"
"net/http"
"path"
"path/filepath"
"time"
"github.com/gin-gonic/gin"
"github.com/photoprism/photoprism/internal/config"
"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 := path.Join(conf.OriginalsPath(), 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)
}
})
}