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zip.go
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zip.go
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package api
import (
"archive/zip"
"fmt"
"io"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"time"
"github.com/gin-gonic/gin"
"github.com/photoprism/photoprism/internal/acl"
"github.com/photoprism/photoprism/internal/form"
"github.com/photoprism/photoprism/internal/i18n"
"github.com/photoprism/photoprism/internal/photoprism"
"github.com/photoprism/photoprism/internal/query"
"github.com/photoprism/photoprism/internal/service"
"github.com/photoprism/photoprism/pkg/clean"
"github.com/photoprism/photoprism/pkg/fs"
"github.com/photoprism/photoprism/pkg/rnd"
)
// ZipCreate creates a zip file archive for download.
//
// POST /api/v1/zip
func ZipCreate(router *gin.RouterGroup) {
router.POST("/zip", func(c *gin.Context) {
s := Auth(SessionID(c), acl.ResourcePhotos, acl.ActionDownload)
if s.Invalid() {
AbortUnauthorized(c)
return
}
conf := service.Config()
if !conf.Settings().Features.Download {
AbortFeatureDisabled(c)
return
}
var f form.Selection
start := time.Now()
if err := c.BindJSON(&f); err != nil {
AbortBadRequest(c)
return
}
if f.Empty() {
Abort(c, http.StatusBadRequest, i18n.ErrNoItemsSelected)
return
}
// Configure file selection based on user settings.
var selection query.FileSelection
if dl := conf.Settings().Download; dl.Disabled {
AbortFeatureDisabled(c)
return
} else {
selection = query.DownloadSelection(dl.MediaRaw, dl.MediaSidecar, dl.Originals)
}
// Find files to download.
files, err := query.SelectedFiles(f, selection)
if err != nil {
Error(c, http.StatusBadRequest, err, i18n.ErrZipFailed)
return
} else if len(files) == 0 {
Abort(c, http.StatusNotFound, i18n.ErrNoFilesForDownload)
return
}
// Configure file names.
dlName := DownloadName(c)
zipPath := path.Join(conf.TempPath(), "zip")
zipToken := rnd.GenerateToken(8)
zipBaseName := fmt.Sprintf("photoprism-download-%s-%s.zip", time.Now().Format("20060102-150405"), zipToken)
zipFileName := path.Join(zipPath, zipBaseName)
// Create temp directory.
if err = os.MkdirAll(zipPath, 0700); err != nil {
Error(c, http.StatusInternalServerError, err, i18n.ErrZipFailed)
return
}
// Create new zip file.
var newZipFile *os.File
if newZipFile, err = os.Create(zipFileName); err != nil {
Error(c, http.StatusInternalServerError, err, i18n.ErrZipFailed)
return
} else {
defer newZipFile.Close()
}
// Create zip writer.
zipWriter := zip.NewWriter(newZipFile)
defer func(w *zip.Writer) {
logError("zip", w.Close())
}(zipWriter)
var aliases = make(map[string]int)
// Add files to zip.
for _, file := range files {
fileName := photoprism.FileName(file.FileRoot, file.FileName)
alias := file.DownloadName(dlName, 0)
key := strings.ToLower(alias)
if seq := aliases[key]; seq > 0 {
alias = file.DownloadName(dlName, seq)
}
aliases[key] += 1
if fs.FileExists(fileName) {
if err := addFileToZip(zipWriter, fileName, alias); err != nil {
log.Errorf("zip: failed adding %s to zip (%s)", clean.Log(file.FileName), err)
Abort(c, http.StatusInternalServerError, i18n.ErrZipFailed)
return
}
log.Infof("zip: added %s as %s", clean.Log(file.FileName), clean.Log(alias))
} else {
log.Warnf("zip: media file %s is missing", clean.Log(file.FileName))
logError("zip", file.Update("FileMissing", true))
}
}
elapsed := int(time.Since(start).Seconds())
log.Infof("zip: created %s [%s]", clean.Log(zipBaseName), time.Since(start))
c.JSON(http.StatusOK, gin.H{"code": http.StatusOK, "message": i18n.Msg(i18n.MsgZipCreatedIn, elapsed), "filename": zipBaseName})
})
}
// ZipDownload downloads a zip file archive.
//
// GET /api/v1/zip/:filename
func ZipDownload(router *gin.RouterGroup) {
router.GET("/zip/:filename", func(c *gin.Context) {
if InvalidDownloadToken(c) {
log.Errorf("zip: %s", c.AbortWithError(http.StatusForbidden, fmt.Errorf("invalid download token")))
return
}
conf := service.Config()
zipBaseName := clean.FileName(filepath.Base(c.Param("filename")))
zipPath := path.Join(conf.TempPath(), "zip")
zipFileName := path.Join(zipPath, zipBaseName)
if !fs.FileExists(zipFileName) {
log.Errorf("zip: %s", c.AbortWithError(http.StatusNotFound, fmt.Errorf("%s not found", clean.Log(zipFileName))))
return
}
defer func(fileName, baseName string) {
log.Debugf("zip: %s has been downloaded", clean.Log(baseName))
// Wait a moment before deleting the zip file, just to be sure:
// https://github.com/photoprism/photoprism/issues/2532
time.Sleep(time.Second)
// Remove the zip file to free up disk space.
if err := os.Remove(fileName); err != nil {
log.Warnf("zip: failed deleting %s (%s)", clean.Log(fileName), err)
} else {
log.Debugf("zip: deleted %s", clean.Log(baseName))
}
}(zipFileName, zipBaseName)
log.Debugf("zip: submitting %s", clean.Log(zipBaseName))
c.FileAttachment(zipFileName, zipBaseName)
})
}
// addFileToZip adds a file to a zip archive.
func addFileToZip(zipWriter *zip.Writer, fileName, fileAlias string) error {
fileToZip, err := os.Open(fileName)
if err != nil {
return err
}
defer fileToZip.Close()
// Get the file information
info, err := fileToZip.Stat()
if err != nil {
return err
}
header, err := zip.FileInfoHeader(info)
if err != nil {
return err
}
header.Name = fileAlias
// Change to deflate to gain better compression
// see http://golang.org/pkg/archive/zip/#pkg-constants
header.Method = zip.Deflate
writer, err := zipWriter.CreateHeader(header)
if err != nil {
return err
}
_, err = io.Copy(writer, fileToZip)
return err
}