Slide Captcha

Randomly generate a sticker slider and ask to drag the slider to verify the sticker overlap.

Install Module

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

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

Install assets

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

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

Example

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/golang/freetype/truetype"
	"github.com/wenlng/go-captcha-assets/resources/images"
	"github.com/wenlng/go-captcha-assets/resources/tiles"
	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/slide"
)

var slideCapt slide.Captcha

func init() {
  builder := slide.NewBuilder(
		//slide.WithGenGraphNumber(2),
		slide.WithEnableGraphVerticalRandom(true),
	)

	// background images
	imgs, err := images.GetImages()
	if err != nil {
		log.Fatalln(err)
	}

	graphs, err := tiles.GetTiles()
	if err != nil {
		log.Fatalln(err)
	}

	var newGraphs = make([]*slide.GraphImage, 0, len(graphs))
	for i := 0; i < len(graphs); i++ {
		graph := graphs[i]
		newGraphs = append(newGraphs, &slide.GraphImage{
			OverlayImage: graph.OverlayImage,
			MaskImage:    graph.MaskImage,
			ShadowImage:  graph.ShadowImage,
		})
	}

	// set resources
	builder.SetResources(
		slide.WithGraphImages(newGraphs),
		slide.WithBackgrounds(imgs),
	)
	
	slideCapt = builder.Make()
}

func main() {
	captData, err := slideCapt.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))

	err = captData.GetMasterImage().SaveToFile("./.caches/master.jpg", option.QualityNone)
	if err != nil {
		fmt.Println(err)
	}
	err = captData.GetThumbImage().SaveToFile("./.caches/thumb.png")
	if err != nil {
		fmt.Println(err)
	}
}

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/golang/freetype/truetype"
	"github.com/wenlng/go-captcha-assets/resources/images"
	"github.com/wenlng/go-captcha-assets/resources/tiles"
	"github.com/wenlng/go-captcha/v2/base/option"
	"github.com/wenlng/go-captcha/v2/slide"
)

var slideCapt slide.Captcha

func init() {
  builder := slide.NewBuilder(
		//slide.WithGenGraphNumber(2),
		slide.WithEnableGraphVerticalRandom(true),
	)

	// background images
	imgs, err := images.GetImages()
	if err != nil {
		log.Fatalln(err)
	}

	graphs, err := tiles.GetTiles()
	if err != nil {
		log.Fatalln(err)
	}

	var newGraphs = make([]*slide.GraphImage, 0, len(graphs))
	for i := 0; i < len(graphs); i++ {
		graph := graphs[i]
		newGraphs = append(newGraphs, &slide.GraphImage{
			OverlayImage: graph.OverlayImage,
			MaskImage:    graph.MaskImage,
			ShadowImage:  graph.ShadowImage,
		})
	}

	// set resources
	builder.SetResources(
		slide.WithGraphImages(newGraphs),
		slide.WithBackgrounds(imgs),
	)
	
	slideCapt = builder.Make()
}

func main() {
	captData, err := slideCapt.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))

	err = captData.GetMasterImage().SaveToFile("./.caches/master.jpg", option.QualityNone)
	if err != nil {
		fmt.Println(err)
	}
	err = captData.GetThumbImage().SaveToFile("./.caches/thumb.png")
	if err != nil {
		fmt.Println(err)
	}
}

Reference

Create an instance

• builder.Make()
• builder.MakeWithRegion()

Configure

TIP

slide.NewBuilder(slide.WithXxxx(), slide.WithXxxx(), ....) OR bilder.SetOptions(slide.WithXxxx(), slide.WithXxxx(), ....)

• slide.WithImageSize(*option.Size)

• slide.WithImageAlpha(float32)

• slide.WithRangeGraphSize(val option.RangeVal)

• slide.WithEnableGraphVerticalRandom(val bool)

• slide.WithGenGraphNumber(val int)

• slide.WithRangeDeadZoneDirections(val []DeadZoneDirectionType)

• slide.WithRangeGraphAnglePos([]option.RangeVal)

Resources

TIP

builder.SetResources(slide.WithXxxx(), slide.WithXxxx(), ....)

• slide.WithBackgrounds([]image.Image)
• slide.WithGraphImages(images []*GraphImage)

Captcha Data

• GetData() *Block
• GetMasterImage() imagedata.JPEGImageData
• GetTitleImage() imagedata.PNGImageData

Refer to the image data API Captcha Image.

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