golang包快速生成base64验证码的方法
base64Captcha快速生成base64编码图片验证码字符串
支持多种样式,算术,数字,字母,混合模式,语音模式.
Base64是网络上最常见的用于传输8Bit字节代码的编码方式之一。Base64编码可用于在HTTP环境下传递较长的标识信息,直接把base64当成是字符串方式的数据就好了
减少了http请求；数据就是图片；
为APIs微服务而设计
为什么base64图片forRESTful服务
DataURIs支持大部分浏览器,IE8之后也支持.
小图片使用base64响应对于RESTful服务来说更便捷
godoc文档
在线DemoPlaygroundPoweredbyVuejs+elementUI+Axios
安装golang包
goget-ugithub.com/mojocn/base64Captcha
创建图像验证码
import"github.com/mojocn/base64Captcha"
funcdemoCodeCaptchaCreate(){
//configstructfordigits
//数字验证码配置
varconfigD=base64Captcha.ConfigDigit{
Height:80,
Width:240,
MaxSkew:0.7,
DotCount:80,
CaptchaLen:5,
}
//configstructforaudio
//声音验证码配置
varconfigA=base64Captcha.ConfigAudio{
CaptchaLen:6,
Language:"zh",
}
//configstructforCharacter
//字符,公式,验证码配置
varconfigC=base64Captcha.ConfigCharacter{
Height:60,
Width:240,
//constCaptchaModeNumber:数字,CaptchaModeAlphabet:字母,CaptchaModeArithmetic:算术,CaptchaModeNumberAlphabet:数字字母混合.
Mode:base64Captcha.CaptchaModeNumber,
ComplexOfNoiseText:base64Captcha.CaptchaComplexLower,
ComplexOfNoiseDot:base64Captcha.CaptchaComplexLower,
IsShowHollowLine:false,
IsShowNoiseDot:false,
IsShowNoiseText:false,
IsShowSlimeLine:false,
IsShowSineLine:false,
CaptchaLen:6,
}
//createaaudiocaptcha.
idKeyA,capA:=base64Captcha.GenerateCaptcha("",configA)
//以base64编码
base64stringA:=base64Captcha.CaptchaWriteToBase64Encoding(capA)
//createacharacterscaptcha.
idKeyC,capC:=base64Captcha.GenerateCaptcha("",configC)
//以base64编码
base64stringC:=base64Captcha.CaptchaWriteToBase64Encoding(capC)
//createadigitscaptcha.
idKeyD,capD:=base64Captcha.GenerateCaptcha("",configD)
//以base64编码
base64stringD:=base64Captcha.CaptchaWriteToBase64Encoding(capD)
fmt.Println(idKeyA,base64stringA,"\n")
fmt.Println(idKeyC,base64stringC,"\n")
fmt.Println(idKeyD,base64stringD,"\n")
}
验证图像验证码
import"github.com/mojocn/base64Captcha"
funcverfiyCaptcha(idkey,verifyValuestring){
verifyResult:=base64Captcha.VerifyCaptcha(idkey,verifyValue)
ifverifyResult{
//success
}else{
//fail
}
}
使用golang搭建API服务
//exampleofHTTPserverthatusesthecaptchapackage.
packagemain
import(
"encoding/json"
"fmt"
"github.com/mojocn/base64Captcha"
"log"
"net/http"
)
//ConfigJsonBodyjsonrequestbody.
typeConfigJsonBodystruct{
Idstring
CaptchaTypestring
VerifyValuestring
ConfigAudiobase64Captcha.ConfigAudio
ConfigCharacterbase64Captcha.ConfigCharacter
ConfigDigitbase64Captcha.ConfigDigit
}
varconfigC=base64Captcha.ConfigCharacter{
Height:60,
Width:240,
Mode:0,
ComplexOfNoiseText:0,
ComplexOfNoiseDot:0,
IsShowHollowLine:false,
IsShowNoiseDot:false,
IsShowNoiseText:false,
IsShowSlimeLine:false,
IsShowSineLine:false,
CaptchaLen:6,
}
//base64Captchacreatehttphandler
funcgenerateCaptchaHandler(whttp.ResponseWriter,r*http.Request){
//parserequestparameters
//接收客户端发送来的请求参数
decoder:=json.NewDecoder(r.Body)
varpostParametersConfigJsonBody
err:=decoder.Decode(&postParameters)
iferr!=nil{
log.Println(err)
}
deferr.Body.Close()
//createbase64encodingcaptcha
//创建base64图像验证码
varconfiginterface{}
switchpostParameters.CaptchaType{
case"audio":
config=postParameters.ConfigAudio
case"character":
config=postParameters.ConfigCharacter
default:
config=postParameters.ConfigDigit
}
captchaId,digitCap:=base64Captcha.GenerateCaptcha(postParameters.Id,config)
base64Png:=base64Captcha.CaptchaWriteToBase64Encoding(digitCap)
//oryoucandothis
//你也可以是用默认参数生成图像验证码
//base64Png:=captcha.GenerateCaptchaPngBase64StringDefault(captchaId)
//setjsonresponse
//设置json响应
w.Header().Set("Content-Type","application/json;charset=utf-8")
body:=map[string]interface{}{"code":1,"data":base64Png,"captchaId":captchaId,"msg":"success"}
json.NewEncoder(w).Encode(body)
}
//base64Captchaverifyhttphandler
funccaptchaVerifyHandle(whttp.ResponseWriter,r*http.Request){
//parserequestparameters
//接收客户端发送来的请求参数
decoder:=json.NewDecoder(r.Body)
varpostParametersConfigJsonBody
err:=decoder.Decode(&postParameters)
iferr!=nil{
log.Println(err)
}
deferr.Body.Close()
//verifythecaptcha
//比较图像验证码
verifyResult:=base64Captcha.VerifyCaptcha(postParameters.Id,postParameters.VerifyValue)
//setjsonresponse
//设置json响应
w.Header().Set("Content-Type","application/json;charset=utf-8")
body:=map[string]interface{}{"code":"error","data":"验证失败","msg":"captchafailed"}
ifverifyResult{
body=map[string]interface{}{"code":"success","data":"验证通过","msg":"captchaverified"}
}
json.NewEncoder(w).Encode(body)
}
//startanet/httpserver
//启动golangnet/http服务器
funcmain(){
//serveVuejs+ElementUI+AxiosWebApplication
http.Handle("/",http.FileServer(http.Dir("./static")))
//apiforcreatecaptcha
http.HandleFunc("/api/getCaptcha",generateCaptchaHandler)
//apiforverifycaptcha
http.HandleFunc("/api/verifyCaptcha",captchaVerifyHandle)
fmt.Println("Serverisatlocalhost:3333")
iferr:=http.ListenAndServe("localhost:3333",nil);err!=nil{
log.Fatal(err)
}
}
运行demo代码
cd$GOPATH/src/github.com/mojocn/captcha/examples gorunmain.go
访问http://localhost:777
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