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45 lines
1.1 KiB
45 lines
1.1 KiB
package controller
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import (
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"bytes"
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"github.com/dchest/captcha"
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"github.com/gin-contrib/sessions"
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"github.com/gin-gonic/gin"
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"net/http"
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"time"
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)
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func GetCaptcha(c *gin.Context) {
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l := captcha.DefaultLen
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w, h := 107, 36
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captchaId := captcha.NewLen(l)
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session := sessions.Default(c)
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session.Set("captcha", captchaId)
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_ = session.Save()
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_ = Serve(c.Writer, c.Request, captchaId, ".png", "zh", false, w, h)
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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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