photoprism/internal/api/folders_cover.go

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package api
import (
"net/http"
"path/filepath"
"time"
"github.com/gin-gonic/gin"
"github.com/photoprism/photoprism/internal/get"
"github.com/photoprism/photoprism/internal/photoprism"
"github.com/photoprism/photoprism/internal/query"
"github.com/photoprism/photoprism/internal/thumb"
"github.com/photoprism/photoprism/pkg/clean"
"github.com/photoprism/photoprism/pkg/fs"
)
const (
folderCover = "folder-cover"
)
// FolderCover returns a folder cover image.
//
// GET /api/v1/folders/t/:hash/:token/:size
//
// Parameters:
//
// uid: string folder uid
// token: string url security token, see config
// size: string thumb type, see thumb.Sizes
func FolderCover(router *gin.RouterGroup) {
router.GET("/folders/t/:uid/:token/:size", func(c *gin.Context) {
if InvalidPreviewToken(c) {
c.Data(http.StatusForbidden, "image/svg+xml", folderIconSvg)
return
}
start := time.Now()
conf := get.Config()
uid := c.Param("uid")
thumbName := thumb.Name(clean.Token(c.Param("size")))
download := c.Query("download") != ""
size, ok := thumb.Sizes[thumbName]
if !ok {
log.Errorf("%s: invalid size %s", folderCover, thumbName)
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
}
if size.Uncached() && !conf.ThumbUncached() {
thumbName, size = thumb.Find(conf.ThumbSizePrecached())
if thumbName == "" {
log.Errorf("folder: invalid thumb size %d", conf.ThumbSizePrecached())
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
}
}
cache := get.CoverCache()
cacheKey := CacheKey(folderCover, uid, string(thumbName))
if cacheData, ok := cache.Get(cacheKey); ok {
log.Tracef("api-v1: cache hit for %s [%s]", cacheKey, time.Since(start))
cached := cacheData.(ThumbCache)
if !fs.FileExists(cached.FileName) {
log.Errorf("%s: %s not found", folderCover, uid)
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
}
AddCoverCacheHeader(c)
if download {
c.FileAttachment(cached.FileName, cached.ShareName)
} else {
c.File(cached.FileName)
}
return
}
f, err := query.FolderCoverByUID(uid)
if err != nil {
log.Debugf("%s: %s contains no pictures, using generic cover", folderCover, uid)
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
}
fileName := photoprism.FileName(f.FileRoot, f.FileName)
if !fs.FileExists(fileName) {
log.Errorf("%s: could not find original for %s", folderCover, fileName)
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
// Set missing flag so that the file doesn't show up in search results anymore.
log.Warnf("%s: %s is missing", folderCover, clean.Log(f.FileName))
logError(folderCover, f.Update("FileMissing", true))
return
}
// Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157
if size.ExceedsLimit() && !download {
log.Debugf("%s: using original, size exceeds limit (width %d, height %d)", folderCover, 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.ThumbCachePath(), size.Width, size.Height, f.FileOrientation, size.Options...)
} else {
thumbnail, err = thumb.FromCache(fileName, f.FileHash, conf.ThumbCachePath(), size.Width, size.Height, size.Options...)
}
if err != nil {
log.Errorf("%s: %s", folderCover, err)
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
} else if thumbnail == "" {
log.Errorf("%s: %s has empty thumb name - you may have found a bug", folderCover, filepath.Base(fileName))
c.Data(http.StatusOK, "image/svg+xml", folderIconSvg)
return
}
cache.SetDefault(cacheKey, ThumbCache{thumbnail, f.ShareBase(0)})
log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
AddCoverCacheHeader(c)
if download {
c.FileAttachment(thumbnail, f.DownloadName(DownloadName(c), 0))
} else {
c.File(thumbnail)
}
})
}