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captcha.go
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captcha.go
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package controllers
//
// GangGo Application Server
// Copyright (C) 2017 Lukas Matt <lukas@zauberstuhl.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
import (
"github.com/revel/revel"
"github.com/dchest/captcha"
"net/http"
"path"
"bytes"
)
type Captcha struct {
*revel.Controller
}
type DisplayImageByName string
func (name DisplayImageByName) Apply(req *revel.Request, resp *revel.Response) {
var content bytes.Buffer
status := http.StatusOK
_, file := path.Split(string(name))
ext := path.Ext(file)
id := file[:len(file)-len(ext)]
err := captcha.WriteImage(&content, id, 250, 100)
if err != nil {
revel.AppLog.Error("Cannot write captcha image", "error", err)
status = http.StatusInternalServerError
}
resp.WriteHeader(status, "image/png")
resp.GetWriter().Write(content.Bytes())
}
func (c Captcha) Index(name string) revel.Result {
return DisplayImageByName(name)
}