-
Notifications
You must be signed in to change notification settings - Fork 2
/
epubserver.go
91 lines (79 loc) · 2.15 KB
/
epubserver.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
package epubserver
import (
"archive/zip"
"encoding/xml"
"errors"
"fmt"
"net/http"
"path"
"strings"
)
func Open(filename string) (*Epub, error) {
r, err := zip.OpenReader(filename)
if err != nil {
return nil, err
}
// We need r to stay open forever
epub := &Epub{Zip: r}
mimetype, _ := epub.getFileAsString("mimetype")
if mimetype != "application/epub+zip" {
return new(Epub), errors.New("Unsupported mime type.")
}
containerFile, _ := epub.getFile("META-INF/container.xml")
c := new(Container)
err = xml.Unmarshal(containerFile, c)
if err != nil {
return nil, err
}
rootFile, _ := epub.getFile(c.Rootfiles[0].Path)
epub.Opfdir = path.Dir(c.Rootfiles[0].Path)
pkg := new(Package)
err = xml.Unmarshal(rootFile, pkg)
if err != nil {
return nil, err
}
epub.Manifest = pkg.Manifest.Items
epub.Spine = pkg.Spine.Itemrefs
return epub, nil
}
func (epub *Epub) Serve() {
http.Handle("/javascripts/", http.FileServer(http.Dir("../public")))
http.HandleFunc("/", epub.ServeHTTP)
http.ListenAndServe(":8080", nil)
}
func (epub *Epub) ServeHTTP(w http.ResponseWriter, r *http.Request) {
reqPath := r.URL.Path[1:]
if reqPath == "" {
// Redirect to first component:
firstComponent := epub.Spine[0].Idref
item, _ := epub.getItemFromId(firstComponent)
http.Redirect(w, r, epub.FullHref(item), 302)
} else {
item, err := epub.getItemFromHref(reqPath)
if err != nil {
fmt.Println(err)
http.NotFound(w, r)
return
}
file, err := epub.getFile(reqPath)
isInSpine, prev, next := epub.getSpinePrevNext(item.Id)
if isInSpine {
var prevHref, nextHref string
if prev != "" {
prevItem, _ := epub.getItemFromId(prev)
prevHref = epub.FullHref(prevItem)
}
if next != "" {
nextItem, _ := epub.getItemFromId(next)
nextHref = epub.FullHref(nextItem)
}
js := fmt.Sprintf("<script>var componentPrev = %q; var componentNext = %q; %s</script>", prevHref, nextHref, ReaderJs)
fileString := strings.Replace(string(file), "</body>", js+"</body>", 1)
w.Header().Set("Content-Type", item.MediaType)
w.Write([]byte(fileString))
} else {
w.Header().Set("Content-Type", item.MediaType)
w.Write(file)
}
}
}