package main
import (
"git.gitorious.org/go-pkg/epub.git"
"net/http"
"os"
"os/exec"
"regexp"
"strconv"
"strings"
"log"
)
func storePath(name string) string {
path := NEW_PATH + name
_, err := os.Stat(path)
for i := 0; err == nil; i++ {
path = NEW_PATH + strconv.Itoa(i) + "_" + name
_, err = os.Stat(path)
}
return path
}
func storeFiles(r *http.Request) ([]string, error) {
r.ParseMultipartForm(20000000)
filesForm := r.MultipartForm.File["epub"]
paths := make([]string, 0, len(filesForm))
for _, f := range filesForm {
log.Println("File uploaded:", f.Filename)
file, err := f.Open()
if err != nil {
return paths, err
}
defer file.Close()
path := storePath(f.Filename)
fw, err := os.Create(path)
if err != nil {
return paths, err
}
defer fw.Close()
const size = 1024
var n int = size
buff := make([]byte, size)
for n == size {
n, err = file.Read(buff)
fw.Write(buff)
}
paths = append(paths, path)
}
return paths, nil
}
func cleanStr(str string) string {
str = strings.Replace(str, "'", "'", -1)
exp, _ := regexp.Compile("&[^;]*;")
str = exp.ReplaceAllString(str, "")
exp, _ = regexp.Compile("[ ,]*$")
str = exp.ReplaceAllString(str, "")
return str
}
func storeImg(img []byte, title, extension string) (string, string) {
folder := COVER_PATH + title[:1]
os.Mkdir(folder, os.ModePerm)
imgPath := ValidFileName(folder, title, extension)
/* store img on disk */
file, err := os.Create(imgPath)
if err != nil {
return "", ""
}
defer file.Close()
file.Write(img)
/* resize img */
resize := append(strings.Split(RESIZE_CMD, " "), imgPath, imgPath)
cmd := exec.Command(resize[0], resize[1:]...)
cmd.Run()
imgPathSmall := ValidFileName(folder, title, "_small"+extension)
resize = append(strings.Split(RESIZE_THUMB_CMD, " "), imgPath, imgPathSmall)
cmd = exec.Command(resize[0], resize[1:]...)
cmd.Run()
return "/" + imgPath, "/" + imgPathSmall
}
func getCover(e *epub.Epub, title string) (string, string) {
/* Try first common names */
for _, p := range []string{"cover.jpg", "Images/cover.jpg", "cover.jpeg", "cover1.jpg", "cover1.jpeg"} {
img := e.Data(p)
if len(img) != 0 {
return storeImg(img, title, ".jpg")
}
}
/* search for img on the text */
exp, _ := regexp.Compile("<ima?g.*[(src)(href)]=[\"']([^\"']*(\\.[^\\.\"']*))[\"']")
it := e.Iterator(epub.EITERATOR_SPINE)
defer it.Close()
var err error = nil
txt := it.Curr()
for err == nil {
res := exp.FindStringSubmatch(txt)
if res != nil {
urlPart := strings.Split(it.CurrUrl(), "/")
url := strings.Join(urlPart[:len(urlPart)-1], "/")
if res[1][:3] == "../" {
res[1] = res[1][3:]
url = strings.Join(urlPart[:len(urlPart)-2], "/")
}
res[1] = strings.Replace(res[1], "%20", " ", -1)
res[1] = strings.Replace(res[1], "%27", "'", -1)
res[1] = strings.Replace(res[1], "%28", "(", -1)
res[1] = strings.Replace(res[1], "%29", ")", -1)
if url == "" {
url = res[1]
} else {
url = url + "/" + res[1]
}
img := e.Data(url)
if len(img) != 0 {
return storeImg(img, title, res[2])
}
}
txt, err = it.Next()
}
return "", ""
}
func parseAuthr(creator []string) []string {
exp1, _ := regexp.Compile("^(.*\\( *([^\\)]*) *\\))*$")
exp2, _ := regexp.Compile("^[^:]*: *(.*)$")
res := make([]string, len(creator))
for i, s := range creator {
auth := exp1.FindStringSubmatch(s)
if auth != nil {
res[i] = cleanStr(strings.Join(auth[2:], ", "))
} else {
auth := exp2.FindStringSubmatch(s)
if auth != nil {
res[i] = cleanStr(auth[1])
} else {
res[i] = cleanStr(s)
}
}
}
return res
}
func parseDescription(description []string) string {
str := cleanStr(strings.Join(description, ", "))
exp, _ := regexp.Compile("<[^>]*>")
str = exp.ReplaceAllString(str, "")
str = strings.Replace(str, "&", "&", -1)
str = strings.Replace(str, "<", "<", -1)
str = strings.Replace(str, ">", ">", -1)
str = strings.Replace(str, "\\n", "\n", -1)
return str
}
func parseSubject(subject []string) []string {
var res []string
for _, s := range subject {
res = append(res, strings.Split(s, " / ")...)
}
return res
}
func parseDate(date []string) string {
if len(date) == 0 {
return ""
}
return strings.Replace(date[0], "Unspecified: ", "", -1)
}
func keywords(b map[string]interface{}) (k []string) {
title, _ := b["title"].(string)
k = strings.Split(title, " ")
author, _ := b["author"].([]string)
for _, a := range author {
k = append(k, strings.Split(a, " ")...)
}
publisher, _ := b["publisher"].(string)
k = append(k, strings.Split(publisher, " ")...)
subject, _ := b["subject"].([]string)
k = append(k, subject...)
return
}
func parseFile(path string) (string, error) {
book := map[string]interface{}{}
e, err := epub.Open(path, 0)
if err != nil {
return "", err
}
defer e.Close()
title := cleanStr(strings.Join(e.Metadata(epub.EPUB_TITLE), ", "))
book["title"] = title
book["author"] = parseAuthr(e.Metadata(epub.EPUB_CREATOR))
book["contributor"] = cleanStr(strings.Join(e.Metadata(epub.EPUB_CONTRIB), ", "))
book["publisher"] = cleanStr(strings.Join(e.Metadata(epub.EPUB_PUBLISHER), ", "))
book["description"] = parseDescription(e.Metadata(epub.EPUB_DESCRIPTION))
book["subject"] = parseSubject(e.Metadata(epub.EPUB_SUBJECT))
book["date"] = parseDate(e.Metadata(epub.EPUB_DATE))
book["lang"] = e.Metadata(epub.EPUB_LANG)
book["type"] = strings.Join(e.Metadata(epub.EPUB_TYPE), ", ")
book["format"] = strings.Join(e.Metadata(epub.EPUB_FORMAT), ", ")
book["source"] = strings.Join(e.Metadata(epub.EPUB_SOURCE), ", ")
book["relation"] = strings.Join(e.Metadata(epub.EPUB_RELATION), ", ")
book["coverage"] = strings.Join(e.Metadata(epub.EPUB_COVERAGE), ", ")
book["rights"] = strings.Join(e.Metadata(epub.EPUB_RIGHTS), ", ")
book["meta"] = strings.Join(e.Metadata(epub.EPUB_META), ", ")
book["path"] = path
cover, coverSmall := getCover(e, title)
book["cover"] = cover
book["coversmall"] = coverSmall
book["keywords"] = keywords(book)
db.InsertBook(book)
return title, nil
}
type uploadData struct {
S Status
}
func uploadHandler(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" {
sess := GetSession(r)
paths, err := storeFiles(r)
if err != nil {
sess.Notify("Problem uploading!", "Some files were not stored. Try again or contact us if it keeps happening", "error")
}
uploaded := ""
for _, path := range paths {
title, err := parseFile(path)
if err != nil {
os.Remove(path)
sess.Notify("Problem uploading!", "The file '"+path[len("new/"):]+"' is not a well formed epub", "error")
} else {
uploaded = uploaded + " '" + title + "'"
}
}
if uploaded != "" {
sess.Notify("Upload successful!", "Added the books:"+uploaded+". Thank you for your contribution", "success")
}
}
var data uploadData
data.S = GetStatus(w, r)
data.S.Upload = true
loadTemplate(w, "upload", data)
}