photoprism/internal/api/covers.go

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package api
import (
"net/http"
"path/filepath"
"time"
"github.com/photoprism/photoprism/pkg/sanitize"
"github.com/gin-gonic/gin"
"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"
)
// Namespaces for caching and logs.
const (
albumCover = "album-cover"
labelCover = "label-cover"
)
// AlbumCover returns an album cover image.
//
// GET /api/v1/albums/:uid/t/:token/:size
//
// Parameters:
// uid: string album uid
// token: string security token (see config)
// size: string thumb type, see photoprism.ThumbnailTypes
func AlbumCover(router *gin.RouterGroup) {
router.GET("/albums/:uid/t/:token/:size", func(c *gin.Context) {
if InvalidPreviewToken(c) {
c.Data(http.StatusForbidden, "image/svg+xml", albumIconSvg)
return
}
start := time.Now()
conf := service.Config()
thumbName := thumb.Name(sanitize.Token(c.Param("size")))
uid := sanitize.IdString(c.Param("uid"))
size, ok := thumb.Sizes[thumbName]
if !ok {
log.Errorf("%s: invalid size %s", albumCover, sanitize.Log(thumbName.String()))
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
return
}
cache := service.CoverCache()
cacheKey := CacheKey(albumCover, uid, string(thumbName))
if cacheData, ok := cache.Get(cacheKey); ok {
log.Tracef("api: cache hit for %s [%s]", cacheKey, time.Since(start))
cached := cacheData.(ThumbCache)
if !fs.FileExists(cached.FileName) {
log.Errorf("%s: %s not found", albumCover, uid)
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
return
}
AddCoverCacheHeader(c)
if c.Query("download") != "" {
c.FileAttachment(cached.FileName, cached.ShareName)
} else {
c.File(cached.FileName)
}
return
}
f, err := query.AlbumCoverByUID(uid)
if err != nil {
log.Debugf("%s: %s contains no photos, using generic cover", albumCover, uid)
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
return
}
fileName := photoprism.FileName(f.FileRoot, f.FileName)
if !fs.FileExists(fileName) {
log.Errorf("%s: found no original for %s", albumCover, sanitize.Log(fileName))
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
// Set missing flag so that the file doesn't show up in search results anymore.
log.Warnf("%s: %s is missing", albumCover, sanitize.Log(f.FileName))
logError(albumCover, f.Update("FileMissing", true))
return
}
// Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157
if size.ExceedsLimit() && c.Query("download") == "" {
log.Debugf("%s: using original, size exceeds limit (width %d, height %d)", albumCover, size.Width, size.Height)
AddCoverCacheHeader(c)
c.File(fileName)
return
}
var thumbnail string
if conf.ThumbUncached() || size.Uncached() {
thumbnail, err = thumb.FromFile(fileName, f.FileHash, conf.ThumbPath(), size.Width, size.Height, f.FileOrientation, size.Options...)
} else {
thumbnail, err = thumb.FromCache(fileName, f.FileHash, conf.ThumbPath(), size.Width, size.Height, size.Options...)
}
if err != nil {
log.Errorf("%s: %s", albumCover, err)
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
return
} else if thumbnail == "" {
log.Errorf("%s: %s has empty thumb name - bug?", albumCover, filepath.Base(fileName))
c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
return
}
cache.SetDefault(cacheKey, ThumbCache{thumbnail, f.ShareBase(0)})
log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
AddCoverCacheHeader(c)
if c.Query("download") != "" {
c.FileAttachment(thumbnail, f.DownloadName(DownloadName(c), 0))
} else {
c.File(thumbnail)
}
})
}
// LabelCover returns a label cover image.
//
// GET /api/v1/labels/:uid/t/:token/:size
//
// Parameters:
// uid: string label uid
// token: string security token (see config)
// size: string thumb type, see photoprism.ThumbnailTypes
func LabelCover(router *gin.RouterGroup) {
router.GET("/labels/:uid/t/:token/:size", func(c *gin.Context) {
if InvalidPreviewToken(c) {
c.Data(http.StatusForbidden, "image/svg+xml", labelIconSvg)
return
}
start := time.Now()
conf := service.Config()
thumbName := thumb.Name(sanitize.Token(c.Param("size")))
uid := sanitize.IdString(c.Param("uid"))
size, ok := thumb.Sizes[thumbName]
if !ok {
log.Errorf("%s: invalid size %s", labelCover, sanitize.Log(thumbName.String()))
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
return
}
cache := service.CoverCache()
cacheKey := CacheKey(labelCover, uid, string(thumbName))
if cacheData, ok := cache.Get(cacheKey); ok {
log.Tracef("api: cache hit for %s [%s]", cacheKey, time.Since(start))
cached := cacheData.(ThumbCache)
if !fs.FileExists(cached.FileName) {
log.Errorf("%s: %s not found", labelCover, uid)
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
return
}
AddCoverCacheHeader(c)
if c.Query("download") != "" {
c.FileAttachment(cached.FileName, cached.ShareName)
} else {
c.File(cached.FileName)
}
return
}
f, err := query.LabelThumbByUID(uid)
if err != nil {
log.Errorf(err.Error())
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
return
}
fileName := photoprism.FileName(f.FileRoot, f.FileName)
if !fs.FileExists(fileName) {
log.Errorf("%s: file %s is missing", labelCover, sanitize.Log(f.FileName))
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
// Set missing flag so that the file doesn't show up in search results anymore.
logError(labelCover, f.Update("FileMissing", true))
return
}
// Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157
if size.ExceedsLimit() {
log.Debugf("%s: using original, size exceeds limit (width %d, height %d)", labelCover, size.Width, size.Height)
AddCoverCacheHeader(c)
c.File(fileName)
return
}
var thumbnail string
if conf.ThumbUncached() || size.Uncached() {
thumbnail, err = thumb.FromFile(fileName, f.FileHash, conf.ThumbPath(), size.Width, size.Height, f.FileOrientation, size.Options...)
} else {
thumbnail, err = thumb.FromCache(fileName, f.FileHash, conf.ThumbPath(), size.Width, size.Height, size.Options...)
}
if err != nil {
log.Errorf("%s: %s", labelCover, err)
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
return
} else if thumbnail == "" {
log.Errorf("%s: %s has empty thumb name - bug?", labelCover, filepath.Base(fileName))
c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
return
}
cache.SetDefault(cacheKey, ThumbCache{thumbnail, f.ShareBase(0)})
log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
AddCoverCacheHeader(c)
if c.Query("download") != "" {
c.FileAttachment(thumbnail, f.DownloadName(DownloadName(c), 0))
} else {
c.File(thumbnail)
}
})
}