I want to use captcha to generate a verification code under Beego. But it has the error invalid memory address or nil pointer dereference.Does anyone know how to solve this problem? Thank you.
Request Method: GET
Request URL: /accounts/forgotpassword
RemoteAddr: 127.0.0.1
Stack
C:/Go/src/runtime/asm_amd64.s:573
C:/Go/src/runtime/panic.go:505
C:/Go/src/text/template/exec.go:137
C:/Go/src/runtime/asm_amd64.s:573
C:/Go/src/runtime/panic.go:505
C:/Go/src/runtime/panic.go:63
C:/Go/src/runtime/signal_windows.go:167
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/utils/captcha/captcha.go:186
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/utils/captcha/captcha.go:164
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/utils/captcha/captcha.go:267
C:/Go/src/runtime/asm_amd64.s:573
C:/Go/src/reflect/value.go:447
C:/Go/src/reflect/value.go:308
C:/Go/src/text/template/exec.go:667
C:/Go/src/text/template/exec.go:535
C:/Go/src/text/template/exec.go:432
C:/Go/src/text/template/exec.go:405
C:/Go/src/text/template/exec.go:231
C:/Go/src/text/template/exec.go:239
C:/Go/src/text/template/exec.go:194
C:/Go/src/text/template/exec.go:177
C:/Go/src/html/template/template.go:137
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/template.go:66
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/controller.go:283
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/controller.go:234
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/controller.go:214
D:/Google Drive/Work/GoWorkspace/src/github.com/astaxie/beego/router.go:863
C:/Go/src/net/http/server.go:2694
C:/Go/src/net/http/server.go:1830
C:/Go/src/runtime/asm_amd64.s:2361
My Code: conf\app.conf
# Cache Provider
CacheProvider = redis
CacheConnection = {"conn":"127.0.0.1:6379"}
controllers\main.go
package controllers
import (
"github.com/astaxie/beego"
"github.com/astaxie/beego/cache"
"github.com/astaxie/beego/utils/captcha"
)
var(
cpt *captcha.Captcha
CacheProvider string = beego.AppConfig.String("CacheProvider")
CacheConnection string = beego.AppConfig.String("CacheConnection")
)
func init() {
store, _ := cache.NewCache(CacheProvider, CacheConnection)
cpt = captcha.NewWithFilter("/accounts/captca/", store)
}
views\forgotpasswordcontroller\get.tpl
<div class="w3-container w3-center">
<form method="post" id="mainForm"class="w3-container" style="margin-top:90px">
<div class="w3-card " style=" padding-left: 0px;
padding-right: 0px; margin-top: 30px;">
<div class="w3-container">
<h1>Reset password</h1>
</div><div class="w3-container" style=" padding-bottom: 16px;">
{{create_captcha}}
<input type="text" class="w3-input "name="captcha"style="outline: none;">
<p style="text-align: left;margin-top: 0px;color:red">
{{if .Errors.Captcha}}
{{.Errors.Captcha}}{{else}}‌{{end}}</p>
<input type="submit" value="Request reset password" onclick="login()" class="w3-button w3-indigo w3-block w3-round-large">
</div>
</div>
</form>
</div>
controllers\forgotpassword.go
package controllers
import (
"github.com/astaxie/beego"
)
type ForgotPasswordController struct {
beego.Controller
}
func (c *ForgotPasswordController) Get() {
beego.Debug("In ForgotPasswordController:Get - Start")
c.Layout = "shared/layout.tpl"
}//end ForgotPasswordController:Get()
func (this *ForgotPasswordController) Post() {
beego.Debug("In ForgotPasswordController:Post - Start")
captchaVerification := cpt.VerifyReq(this.Ctx.Request)
if !captchaVerification {
errormap := make(map[string]string)
beego.Debug("In ForgotPasswordController:Post - captchaVerification Got wrong captcha")
errormap["Captcha"] = "Sorry but the characters you endered didn't match. Please try again"
this.Data["Errors"] = errormap
return
}
} //end ForgotPassword() func
Environment
- go version go1.10 windows/amd64
- Beego : 1.10.1