143 lines
3.1 KiB
Go
143 lines
3.1 KiB
Go
package main
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import (
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"bytes"
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"git.gitorious.org/go-pkg/epubgo.git"
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"io/ioutil"
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"log"
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"mime/multipart"
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"net/http"
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"strings"
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)
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func InitUpload() {
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uploadChannel = make(chan uploadRequest, CHAN_SIZE)
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go uploadWorker()
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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() {
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for req := range uploadChannel {
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processFile(req)
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}
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}
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func processFile(req uploadRequest) {
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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.Println("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 := parseFile(epub)
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title, _ := book["title"].(string)
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req.file.Seek(0, 0)
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id, size, err := StoreNewFile(title+".epub", req.file)
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if err != nil {
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log.Println("Error storing book (", title, "):", err)
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return
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}
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book["file"] = id
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book["filesize"] = size
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err = db.InsertBook(book)
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if err != nil {
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log.Println("Error storing metadata (", title, "):", err)
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return
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}
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log.Println("File uploaded:", req.filename)
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}
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func uploadPostHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
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problem := false
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r.ParseMultipartForm(20000000)
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filesForm := 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.Println("Can not open uploaded file", f.Filename, ":", err)
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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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sess.Notify("Upload successful!", "Thank you for your contribution", "success")
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} else {
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sess.Notify("Upload problem!", "No books where uploaded.", "error")
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}
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}
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uploadHandler(w, r, sess)
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}
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func uploadHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
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var data uploadData
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data.S = GetStatus(w, r)
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data.S.Upload = true
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loadTemplate(w, "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 parseFile(epub *epubgo.Epub) map[string]interface{} {
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book := map[string]interface{}{}
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for _, m := range epub.MetadataFields() {
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data, err := epub.Metadata(m)
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if err != nil {
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continue
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}
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switch m {
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case "creator":
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book["author"] = parseAuthr(data)
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case "description":
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book[m] = parseDescription(data)
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case "subject":
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book[m] = parseSubject(data)
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case "date":
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book[m] = parseDate(data)
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case "language":
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book["lang"] = data
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case "title", "contributor", "publisher":
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book[m] = cleanStr(strings.Join(data, ", "))
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case "identifier":
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attr, _ := epub.MetadataAttr(m)
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for i, d := range data {
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if attr[i]["scheme"] == "ISBN" {
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book["isbn"] = d
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}
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}
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default:
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book[m] = strings.Join(data, ", ")
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}
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}
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title, _ := book["title"].(string)
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book["file"] = nil
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cover, coverSmall := GetCover(epub, title)
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if cover != "" {
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book["cover"] = cover
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book["coversmall"] = coverSmall
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}
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book["keywords"] = keywords(book)
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return book
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}
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