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package servers
import (
"bytes"
"fmt"
"gin-vue-admin/config"
"github.com/dchest/captcha"
"net/http"
"path"
"strings"
"time"
)
// 这里需要自行实现captcha 的gin模式
func GinCapthcaServeHTTP(w http.ResponseWriter, r *http.Request) {
dir, file := path.Split(r.URL.Path)
ext := path.Ext(file)
id := file[:len(file)-len(ext)]
if ext == "" || id == "" {
http.NotFound(w, r)
return
}
fmt.Println("reload : " + r.FormValue("reload"))
if r.FormValue("reload") != "" {
captcha.Reload(id)
}
lang := strings.ToLower(r.FormValue("lang"))
download := path.Base(dir) == "download"
if Serve(w, r, id, ext, lang, download, config.GinVueAdminconfig.Captcha.ImgWidth, config.GinVueAdminconfig.Captcha.ImgHeight) == captcha.ErrNotFound {
http.NotFound(w, r)
}
}
func Serve(w http.ResponseWriter, r *http.Request, id, ext, lang string, download bool, width, height int) error {
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0")
var content bytes.Buffer
switch ext {
case ".png":
w.Header().Set("Content-Type", "image/png")
captcha.WriteImage(&content, id, width, height)
case ".wav":
w.Header().Set("Content-Type", "audio/x-wav")
captcha.WriteAudio(&content, id, lang)
default:
return captcha.ErrNotFound
}
if download {
w.Header().Set("Content-Type", "application/octet-stream")
}
http.ServeContent(w, r, id+ext, time.Time{}, bytes.NewReader(content.Bytes()))
return nil
}