125 lines
2.7 KiB
Go
125 lines
2.7 KiB
Go
package trantor
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import (
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log "github.com/cihub/seelog"
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"bytes"
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"crypto/rand"
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"encoding/base64"
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"io/ioutil"
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"mime/multipart"
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"github.com/meskio/epubgo"
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"gitlab.com/trantor/trantor/lib/database"
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"gitlab.com/trantor/trantor/lib/parser"
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"gitlab.com/trantor/trantor/lib/storage"
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)
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const (
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uploadChanSize = 100
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)
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func InitUpload(database database.DB, store storage.Store) {
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uploadChannel = make(chan uploadRequest, uploadChanSize)
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go uploadWorker(database, store)
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}
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var uploadChannel chan uploadRequest
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type uploadRequest struct {
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file multipart.File
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filename string
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}
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func uploadWorker(database database.DB, store storage.Store) {
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for req := range uploadChannel {
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processFile(req, database, store)
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}
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}
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func processFile(req uploadRequest, db database.DB, store storage.Store) {
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defer req.file.Close()
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epub, err := openMultipartEpub(req.file)
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if err != nil {
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log.Warn("Not valid epub uploaded file ", req.filename, ": ", err)
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return
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}
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defer epub.Close()
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book := parser.EpubMetadata(epub)
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book.ID = genID()
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req.file.Seek(0, 0)
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size, err := store.Store(book.ID, req.file, epubFile)
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if err != nil {
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log.Error("Error storing book (", book.ID, "): ", err)
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return
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}
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book.FileSize = int(size)
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book.Cover = GetCover(epub, book.ID, store)
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err = db.AddBook(book)
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if err != nil {
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log.Error("Error storing metadata (", book.ID, "): ", err)
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return
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}
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log.Info("File uploaded: ", req.filename)
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}
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func uploadPostHandler(h handler) {
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if h.ro {
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h.sess.Notify("Upload failed!", "The library is in Read Only mode, no books can be uploaded", "error")
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uploadHandler(h)
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return
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}
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problem := false
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h.r.ParseMultipartForm(20000000)
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filesForm := h.r.MultipartForm.File["epub"]
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for _, f := range filesForm {
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file, err := f.Open()
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if err != nil {
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log.Error("Can not open uploaded file ", f.Filename, ": ", err)
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h.sess.Notify("Upload problem!", "There was a problem with book "+f.Filename, "error")
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problem = true
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continue
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}
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uploadChannel <- uploadRequest{file, f.Filename}
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}
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if !problem {
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if len(filesForm) > 0 {
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h.sess.Notify("Upload successful!", "Thank you for your contribution", "success")
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} else {
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h.sess.Notify("Upload problem!", "No books where uploaded.", "error")
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}
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}
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uploadHandler(h)
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}
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func uploadHandler(h handler) {
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var data uploadData
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data.S = GetStatus(h)
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data.S.Title = "Upload -- " + data.S.Title
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data.S.Upload = true
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h.load("upload", data)
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}
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type uploadData struct {
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S Status
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}
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func openMultipartEpub(file multipart.File) (*epubgo.Epub, error) {
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buff, _ := ioutil.ReadAll(file)
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reader := bytes.NewReader(buff)
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return epubgo.Load(reader, int64(len(buff)))
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}
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func genID() string {
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b := make([]byte, 12)
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rand.Read(b)
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return base64.URLEncoding.EncodeToString(b)
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}
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