Go Captcha

$ go get -u github.com/wenlng/go-captcha/v2@latest

package main

import "github.com/wenlng/go-captcha/v2"

func main(){
   // ...
}

package main

import (
	"encoding/json"
	"fmt"
	"image"
	"log"
	"io/ioutil"

	"github.com/golang/freetype"
	"github.com/golang/freetype/truetype"
	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/click"
	"github.com/wenlng/go-captcha/v2/base/codec"
)

var textCapt click.Captcha

func init() {
	builder := click.NewBuilder(
		click.WithRangeLen(option.RangeVal{Min: 4, Max: 6}),
		click.WithRangeVerifyLen(option.RangeVal{Min: 2, Max: 4}),
	)

	// You can use preset material resources：https://github.com/wenlng/go-captcha-assets
	fontN, err := loadFont("../resources/fzshengsksjw_cu.ttf")
	if err != nil {
		log.Fatalln(err)
	}

	bgImage, err := loadPng("../resources/bg.png")
	if err != nil {
		log.Fatalln(err)
	}

	builder.SetResources(
		click.WithChars([]string{
			"1A",
			"5E",
			"3d",
			"0p",
			"78",
			"DL",
			"CB",
			"9M",
			// ...
		}),
		click.WithFonts([]*truetype.Font{
			fontN,
		}),
		click.WithBackgrounds([]image.Image{
			bgImage,
		}),
	)

	textCapt= builder.Make()
}

func loadPng(p string) (image.Image, error) {
	imgBytes, err := ioutil.ReadFile(p)
	if err != nil {
		return nil, err
	}
	return codec.DecodeByteToPng(imgBytes)
}

func loadFont(p string) (*truetype.Font, error) {
	fontBytes, err := ioutil.ReadFile(p)
	if err != nil {
		panic(err)
	}
	return freetype.ParseFont(fontBytes)
}


func main() {
	captData, err := textCapt.Generate()
	if err != nil {
		log.Fatalln(err)
	}

	dotData := captData.GetData()
	if dotData == nil {
		log.Fatalln(">>>>> generate err")
	}

	dots, _ := json.Marshal(dotData)
	fmt.Println(">>>>> ", string(dots))

	var mBase64, tBase64 string
	mBase64, err = captData.GetMasterImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	tBase64, err = captData.GetThumbImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	
	fmt.Println(">>>>> ", mBase64)
	fmt.Println(">>>>> ", tBase64)
	
	//err = captData.GetMasterImage().SaveToFile("../resources/master.jpg", option.QualityNone)
	//if err != nil {
	//	fmt.Println(err)
	//}
	//err = captData.GetThumbImage().SaveToFile("../resources/thumb.png")
	//if err != nil {
	//	fmt.Println(err)
	//}
}

package main

import (
	"encoding/json"
	"fmt"
	"image"
	"log"
	"io/ioutil"

	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/slide"
	"github.com/wenlng/go-captcha/v2/base/codec"
)

var slideTileCapt slide.Captcha

func init() {
	builder := slide.NewBuilder()

	// You can use preset material resources：https://github.com/wenlng/go-captcha-assets
	bgImage, err := loadPng("../resources/bg.png")
	if err != nil {
		log.Fatalln(err)
	}

	bgImage1, err := loadPng("../resources/bg1.png")
	if err != nil {
		log.Fatalln(err)
	}

	graphs := getSlideTileGraphArr()

	builder.SetResources(
		slide.WithGraphImages(graphs),
		slide.WithBackgrounds([]image.Image{
			bgImage,
			bgImage1,
		}),
	)

	slideTileCapt = builder.Make()
}

func getSlideTileGraphArr() []*slide.GraphImage {
	tileImage1, err := loadPng("../resources/tile-1.png")
	if err != nil {
		log.Fatalln(err)
	}

	tileShadowImage1, err := loadPng("../resources/tile-shadow-1.png")
	if err != nil {
		log.Fatalln(err)
	}
	tileMaskImage1, err := loadPng("../resources/tile-mask-1.png")
	if err != nil {
		log.Fatalln(err)
	}

	return []*slide.GraphImage{
		{
			OverlayImage: tileImage1,
			ShadowImage:  tileShadowImage1,
			MaskImage:    tileMaskImage1,
		},
	}
}

func main() {
	captData, err := slideTileCapt.Generate()
	if err != nil {
		log.Fatalln(err)
	}

	blockData := captData.GetData()
	if blockData == nil {
		log.Fatalln(">>>>> generate err")
	}

	block, _ := json.Marshal(blockData)
	fmt.Println(">>>>>", string(block))

	var mBase64, tBase64 string
	mBase64, err = captData.GetMasterImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	tBase64, err = captData.GetTileImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}

	fmt.Println(">>>>> ", mBase64)
	fmt.Println(">>>>> ", tBase64)
	
	//err = captData.GetMasterImage().SaveToFile("../resources/master.jpg", option.QualityNone)
	//if err != nil {
	//	fmt.Println(err)
	//}
	//err = captData.GetTileImage().SaveToFile("../resources/thumb.png")
	//if err != nil {
	//	fmt.Println(err)
	//}
}

func loadPng(p string) (image.Image, error) {
	imgBytes, err := ioutil.ReadFile(p)
	if err != nil {
		return nil, err
	}
	return codec.DecodeByteToPng(imgBytes)
}

package main

import (
	"encoding/json"
	"fmt"
	"image"
	"log"
	"io/ioutil"

	"github.com/wenlng/go-captcha/v2/rotate"
	"github.com/wenlng/go-captcha/v2/base/codec"
)

var rotateCapt rotate.Captcha

func init() {
	builder := rotate.NewBuilder()

	// You can use preset material resources：https://github.com/wenlng/go-captcha-assets
	bgImage, err := loadPng("../resources/bg.png")
	if err != nil {
		log.Fatalln(err)
	}

	bgImage1, err := loadPng("../resources/bg1.png")
	if err != nil {
		log.Fatalln(err)
	}

	builder.SetResources(
		rotate.WithImages([]image.Image{
			bgImage,
			bgImage1,
		}),
	)

	rotateCapt = builder.Make()
}

func main() {
	captData, err := rotateCapt.Generate()
	if err != nil {
		log.Fatalln(err)
	}

	blockData := captData.GetData()
	if blockData == nil {
		log.Fatalln(">>>>> generate err")
	}

	block, _ := json.Marshal(blockData)
	fmt.Println(">>>>>", string(block))

	var mBase64, tBase64 string
	mBase64, err = captData.GetMasterImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}
	tBase64, err = captData.GetThumbImage().ToBase64()
	if err != nil {
		fmt.Println(err)
	}

	fmt.Println(">>>>> ", mBase64)
	fmt.Println(">>>>> ", tBase64)
	
	//err = captData.GetMasterImage().SaveToFile("../resources/master.png")
	//if err != nil {
	//	fmt.Println(err)
	//}
	//err = captData.GetThumbImage().SaveToFile("../resources/thumb.png")
	//if err != nil {
	//	fmt.Println(err)
	//}
}

func loadPng(p string) (image.Image, error) {
	imgBytes, err := ioutil.ReadFile(p)
	if err != nil {
		return nil, err
	}
	return codec.DecodeByteToPng(imgBytes)
}