You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
215 lines
4.7 KiB
215 lines
4.7 KiB
package caddyhugo
|
|
|
|
import (
|
|
"fmt"
|
|
"image"
|
|
"image/jpeg"
|
|
"io"
|
|
"net/http"
|
|
"os"
|
|
"path"
|
|
"path/filepath"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/nfnt/resize"
|
|
)
|
|
|
|
type MediaSource struct {
|
|
StorageDir string
|
|
ThumbDir string
|
|
}
|
|
|
|
func (ms *MediaSource) LocationOrig(m Media) string {
|
|
return path.Join(ms.StorageDir, m.Name)
|
|
}
|
|
|
|
type Media struct {
|
|
Type string
|
|
Name string
|
|
}
|
|
|
|
func (ms *MediaSource) ThumbMax(m Media, maxDim int) (string, int, int, error) {
|
|
f, err := os.Open(ms.LocationOrig(m))
|
|
if err != nil {
|
|
return "", 0, 0, err
|
|
}
|
|
defer f.Close()
|
|
|
|
img, _, err := image.Decode(f)
|
|
if err != nil {
|
|
return "", 0, 0, err
|
|
}
|
|
|
|
rect := img.Bounds()
|
|
width := rect.Dx()
|
|
height := rect.Dy()
|
|
|
|
if width > height {
|
|
height = height * maxDim / width
|
|
width = maxDim
|
|
} else {
|
|
width = width * maxDim / height
|
|
height = maxDim
|
|
}
|
|
|
|
src, err := ms.ThumbImage(img, m, width, height)
|
|
return src, width, height, err
|
|
}
|
|
|
|
func (ms *MediaSource) ByName(name string) *Media {
|
|
return &Media{
|
|
Type: "image",
|
|
Name: name,
|
|
}
|
|
}
|
|
|
|
func (ms *MediaSource) Thumb(m Media, width, height int) (string, error) {
|
|
f, err := os.Open(ms.LocationOrig(m))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
defer f.Close()
|
|
|
|
img, _, err := image.Decode(f)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return ms.ThumbImage(img, m, width, height)
|
|
}
|
|
|
|
func (ms *MediaSource) ThumbImage(img image.Image, m Media, width, height int) (string, error) {
|
|
|
|
thumbSlug := filepath.Join(m.Name, fmt.Sprintf("%d/%d.jpg", width, height))
|
|
thumbLoc := filepath.Join(ms.ThumbDir, thumbSlug)
|
|
|
|
os.MkdirAll(path.Dir(thumbLoc), 0755)
|
|
fthumb, err := os.OpenFile(thumbLoc, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0655)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
img = resize.Resize(uint(width), uint(height), img, resize.Bilinear)
|
|
|
|
err = jpeg.Encode(fthumb, img, nil)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
err = fthumb.Close()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return path.Join("/media", thumbSlug), nil
|
|
}
|
|
|
|
func (ms *MediaSource) Walk() ([]*Media, error) {
|
|
var media []*Media
|
|
|
|
err := filepath.Walk(ms.StorageDir, func(name string, fi os.FileInfo, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if fi.IsDir() {
|
|
return nil
|
|
}
|
|
media = append(media, ms.ByName(path.Base(name)))
|
|
return nil
|
|
})
|
|
|
|
return media, err
|
|
}
|
|
|
|
func (ch *CaddyHugo) serveMediaPage(w http.ResponseWriter, r *http.Request) (int, error) {
|
|
if ch.Media == nil {
|
|
http.NotFound(w, r)
|
|
return 404, nil
|
|
}
|
|
|
|
io.WriteString(w, `<html>
|
|
<head><style>.img { float: left; text-align: center; }</style></head>
|
|
<body>
|
|
`)
|
|
if ch.Media != nil {
|
|
media, err := ch.Media.Walk()
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return 500, nil
|
|
}
|
|
|
|
for _, m := range media {
|
|
src, width, height, err := ch.Media.ThumbMax(*m, 100)
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return 500, nil
|
|
}
|
|
fmt.Fprintf(w, `<div class="img"><img width=%d height=%d src=%q /><br /><input type="text" disabled value=%q /></div>`, width, height, src, src)
|
|
}
|
|
}
|
|
io.WriteString(w, `</body><html>`)
|
|
return 200, nil
|
|
}
|
|
|
|
func (ch *CaddyHugo) serveMedia(w http.ResponseWriter, r *http.Request) (int, error) {
|
|
if ch.Media == nil {
|
|
http.NotFound(w, r)
|
|
return 404, nil
|
|
}
|
|
|
|
segs := strings.Split(r.URL.Path, "/")
|
|
name := segs[2]
|
|
file := ""
|
|
var err error
|
|
m := ch.Media.ByName(name)
|
|
|
|
switch len(segs) {
|
|
case 3:
|
|
file = name
|
|
case 4:
|
|
var max int
|
|
max, err = strconv.Atoi(removeExtension(segs[3]))
|
|
if err != nil {
|
|
http.Error(w, fmt.Sprintf("expected /media/filename, /media/filename/maxDim, or /media/filename/width/height..."), http.StatusBadRequest)
|
|
return 400, nil
|
|
}
|
|
|
|
file, _, _, err = ch.Media.ThumbMax(*m, max)
|
|
case 5:
|
|
var width, height int
|
|
width, err = strconv.Atoi(segs[3])
|
|
if err != nil {
|
|
http.Error(w, fmt.Sprintf("expected /media/filename, /media/filename/maxDim, or /media/filename/width/height.."), http.StatusBadRequest)
|
|
return 400, nil
|
|
}
|
|
height, err = strconv.Atoi(removeExtension(segs[4]))
|
|
if err != nil {
|
|
http.Error(w, fmt.Sprintf("expected /media/filename, /media/filename/maxDim, or /media/filename/width/height."), http.StatusBadRequest)
|
|
return 400, nil
|
|
}
|
|
file, err = ch.Media.Thumb(*m, width, height)
|
|
default:
|
|
http.Error(w, fmt.Sprintf("expected /media/filename, /media/filename/maxDim, or /media/filename/width/height"), http.StatusBadRequest)
|
|
return 400, nil
|
|
}
|
|
|
|
if err != nil {
|
|
http.Error(w, fmt.Sprintf("unable to load thumb"), http.StatusInternalServerError)
|
|
return 500, nil
|
|
}
|
|
|
|
if file[0] == '/' {
|
|
file = file[1:]
|
|
}
|
|
|
|
file = path.Join(ch.Media.ThumbDir, file[len("media/"):])
|
|
http.ServeFile(w, r, file)
|
|
|
|
return 200, nil
|
|
}
|
|
|
|
func removeExtension(name string) string {
|
|
ext := path.Ext(name)
|
|
return name[:len(name)-len(ext)]
|
|
}
|
|
|