package main import ( "git.gitorious.org/go-pkg/epubgo.git" "io" "labix.org/v2/mgo/bson" "net/http" "regexp" "strconv" "strings" ) type chapter struct { Label string Link string Depth int Active bool In []bool // one level in depth Out []bool // one level out depth } type readData struct { S Status Book Book Content string Chapters []chapter Next string Prev string Back string } func parseUrl(url string) (string, string, string) { exp, _ := regexp.Compile("^(\\/[^\\/]*\\/)([^\\/]*)\\/?(.*)?$") res := exp.FindStringSubmatch(url) base := res[1] id := res[2] file := "" if len(res) == 4 { file = res[3] } return base, id, file } func cleanHtml(html string) string { str := strings.Split(html, "", 2) if len(str) < 2 { return str[0] } return "
" + strings.Split(str[1], "")[0] + "
" } func genLink(id string, base string, link string) string { return base + id + "/" + link } func cleanLink(link string) string { for i := 0; i < len(link); i++ { if link[i] == '%' { c, _ := strconv.ParseInt(link[i+1:i+3], 16, 0) link = link[:i] + string(c) + link[i+3:] } } return link } func getNextPrev(e *epubgo.Epub, file string, id string, base string) (string, string) { spine, err := e.Spine() if err != nil { return "", "" } prev := "" next := "" for err == nil { if cleanLink(spine.Url()) == file { break } prev = spine.Url() err = spine.Next() } if err != nil { return "", "" } prev = genLink(id, base, prev) if spine.Next() == nil { next = genLink(id, base, spine.Url()) } return next, prev } func getChapters(e *epubgo.Epub, file string, id string, base string) []chapter { nav, err := e.Navigation() if err != nil { return nil } chapters := listChapters(nav, 0) for i, c := range chapters { chapters[i].Link = genLink(id, base, c.Link) if cleanLink(c.Link) == file { chapters[i].Active = true } } return chapters } func listChapters(nav *epubgo.NavigationIterator, depth int) []chapter { var chapters []chapter var err error = nil for err == nil { var c chapter c.Label = nav.Title() c.Link = nav.Url() c.Depth = depth for c.Depth < depth { c.Out = append(c.Out, true) depth-- } chapters = append(chapters, c) if nav.HasChildren() { nav.In() children := listChapters(nav, depth+1) children[0].In = []bool{true} children[len(children)-1].Out = []bool{true} chapters = append(chapters, children...) nav.Out() } err = nav.Next() } chapters[0].In = []bool{true} chapters[len(chapters)-1].Out = []bool{true} return chapters } func readHandler(w http.ResponseWriter, r *http.Request) { base, id, file := parseUrl(r.URL.Path) books, _, err := db.GetBooks(bson.M{"_id": bson.ObjectIdHex(id)}) if err != nil || len(books) == 0 { http.NotFound(w, r) return } var data readData data.Book = books[0] var bookPath string if !data.Book.Active { sess := GetSession(r) if sess.User == "" { http.NotFound(w, r) return } data.Back = "/new/" bookPath = NEW_PATH + data.Book.Path } else { data.Back = "/book/" + id bookPath = BOOKS_PATH + data.Book.Path } e, err := epubgo.Open(bookPath) if err != nil { http.NotFound(w, r) return } defer e.Close() if file == "" { it, err := e.Spine() if err != nil { http.NotFound(w, r) return } http.Redirect(w, r, base+id+"/"+it.Url(), http.StatusTemporaryRedirect) return } data.S = GetStatus(w, r) data.Next, data.Prev = getNextPrev(e, file, id, base) data.Chapters = getChapters(e, file, id, base) data.Content = genLink(id, "/content/", file) loadTemplate(w, "read", data) } func contentHandler(w http.ResponseWriter, r *http.Request) { _, id, file := parseUrl(r.URL.Path) books, _, err := db.GetBooks(bson.M{"_id": bson.ObjectIdHex(id)}) if err != nil || len(books) == 0 { http.NotFound(w, r) return } book := books[0] var bookPath string if !book.Active { sess := GetSession(r) if sess.User == "" { http.NotFound(w, r) return } bookPath = NEW_PATH + book.Path } else { bookPath = BOOKS_PATH + book.Path } e, _ := epubgo.Open(bookPath) defer e.Close() if file == "" { http.NotFound(w, r) return } html, err := e.OpenFile(file) if err != nil { http.NotFound(w, r) return } defer html.Close() io.Copy(w, html) }