mirror of
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125 lines
3.3 KiB
Go
125 lines
3.3 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package captcha implements generation and verification of image CAPTCHAs.
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// an example for use captcha
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//
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// ```
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// package controllers
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//
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// import (
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// "github.com/astaxie/beego"
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// "github.com/astaxie/beego/cache"
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// "github.com/astaxie/beego/utils/captcha"
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// )
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//
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// var cpt *captcha.Captcha
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//
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// func init() {
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// // use beego cache system store the captcha data
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// store := cache.NewMemoryCache()
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// cpt = captcha.NewWithFilter("/captcha/", store)
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// }
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//
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// type MainController struct {
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// beego.Controller
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// }
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//
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// func (this *MainController) Get() {
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// this.TplName = "index.tpl"
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// }
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//
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// func (this *MainController) Post() {
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// this.TplName = "index.tpl"
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//
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// this.Data["Success"] = cpt.VerifyReq(this.Ctx.Request)
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// }
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// ```
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//
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// template usage
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//
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// ```
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// {{.Success}}
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// <form action="/" method="post">
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// {{create_captcha}}
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// <input name="captcha" type="text">
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// </form>
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// ```
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package captcha
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import (
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"html/template"
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"net/http"
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"time"
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"github.com/astaxie/beego/server/web/captcha"
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beecontext "github.com/astaxie/beego/server/web/context"
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"github.com/astaxie/beego/adapter/cache"
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"github.com/astaxie/beego/adapter/context"
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)
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var (
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defaultChars = []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
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)
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const (
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// default captcha attributes
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challengeNums = 6
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expiration = 600 * time.Second
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fieldIDName = "captcha_id"
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fieldCaptchaName = "captcha"
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cachePrefix = "captcha_"
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defaultURLPrefix = "/captcha/"
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)
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// Captcha struct
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type Captcha captcha.Captcha
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// Handler beego filter handler for serve captcha image
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func (c *Captcha) Handler(ctx *context.Context) {
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(*captcha.Captcha)(c).Handler((*beecontext.Context)(ctx))
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}
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// CreateCaptchaHTML template func for output html
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func (c *Captcha) CreateCaptchaHTML() template.HTML {
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return (*captcha.Captcha)(c).CreateCaptchaHTML()
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}
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// CreateCaptcha create a new captcha id
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func (c *Captcha) CreateCaptcha() (string, error) {
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return (*captcha.Captcha)(c).CreateCaptcha()
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}
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// VerifyReq verify from a request
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func (c *Captcha) VerifyReq(req *http.Request) bool {
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return (*captcha.Captcha)(c).VerifyReq(req)
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}
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// Verify direct verify id and challenge string
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func (c *Captcha) Verify(id string, challenge string) (success bool) {
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return (*captcha.Captcha)(c).Verify(id, challenge)
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}
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// NewCaptcha create a new captcha.Captcha
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func NewCaptcha(urlPrefix string, store cache.Cache) *Captcha {
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return (*Captcha)(captcha.NewCaptcha(urlPrefix, cache.CreateOldToNewAdapter(store)))
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}
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// NewWithFilter create a new captcha.Captcha and auto AddFilter for serve captacha image
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// and add a template func for output html
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func NewWithFilter(urlPrefix string, store cache.Cache) *Captcha {
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return (*Captcha)(captcha.NewWithFilter(urlPrefix, cache.CreateOldToNewAdapter(store)))
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}
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