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