.github/workflows/go.yml

@@ -0,0 +1,24 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Golang
+      uses: actions/setup-go@v2
+      with:
+        go-version: '^1.16.0'
+    - run: go version
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: install dependencies
+      run: go mod download
+
+    - name: run test
+      run: go test -race -coverprofile=coverage.txt -covermode=atomic
+    
+    - name: upload coverage
+      run: bash <(curl -s https://codecov.io/bash)

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 - 2024 Weilin Shi
+Copyright (c) 2017 - 2021 Weilin Shi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -2,17 +2,19 @@
 
 <div>
 
-[![PkgGoDev](https://pkg.go.dev/badge/concord.hectabit.org/HectaBit/captcha)](https://pkg.go.dev/concord.hectabit.org/HectaBit/captcha)
-[![Go Report Card](https://goreportcard.com/badge/concord.hectabit.org/HectaBit/captcha)](https://goreportcard.com/report/concord.hectabit.org/HectaBit/captcha)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/steambap/captcha)](https://pkg.go.dev/github.com/steambap/captcha)
+[![Build Status](https://github.com/steambap/captcha/workflows/CI/badge.svg)](https://github.com/steambap/captcha/actions?workflow=CI)
+[![codecov](https://codecov.io/gh/steambap/captcha/branch/main/graph/badge.svg)](https://codecov.io/gh/steambap/captcha)
+[![Go Report Card](https://goreportcard.com/badge/github.com/steambap/captcha)](https://goreportcard.com/report/github.com/steambap/captcha)
 
 </div>
 
 ## Why another captcha generator?
-Because I can. 
+I want a simple and framework-independent way to generate captcha. It also should be flexible, at least allow me to pick my favorite font.
 
 ## install
 ```
-go get concord.hectabit.org/HectaBit/captcha
+go get github.com/steambap/captcha
 ```
 
 ## usage
@@ -30,9 +32,8 @@ func handle(w http.ResponseWriter, r *http.Request) {
 
 ```
 
-[documentation](https://pkg.go.dev/concord.hectabit.org/HectaBit/captcha) |
-[example](example/basic/main.go) |
-[font example](example/load-font/main.go)
+[documentation](https://pkg.go.dev/github.com/steambap/captcha) |
+[example](example/basic/main.go)
 
 ## sample image
 ![image](example/captcha.png)

captcha.go

@@ -62,7 +62,7 @@ func newDefaultOption(width, height int) *Options {
 	return &Options{
 		BackgroundColor: color.Transparent,
 		CharPreset:      charPreset,
-		TextLength:      6,
+		TextLength:      4,
 		CurveNumber:     2,
 		FontDPI:         72.0,
 		FontScale:       1.0,
@@ -136,7 +136,11 @@ func New(width int, height int, option ...SetOption) (*Data, error) {
 
 	text := randomText(options)
 	img := image.NewNRGBA(image.Rect(0, 0, width, height))
-	if err := drawWithOption(text, img, options); err != nil {
+	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
+	drawNoise(img, options)
+	drawCurves(img, options)
+	err := drawText(text, img, options)
+	if err != nil {
 		return nil, err
 	}
 
@@ -153,42 +157,21 @@ func NewMathExpr(width int, height int, option ...SetOption) (*Data, error) {
 
 	text, equation := randomEquation()
 	img := image.NewNRGBA(image.Rect(0, 0, width, height))
-	if err := drawWithOption(equation, img, options); err != nil {
+	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
+	drawNoise(img, options)
+	drawCurves(img, options)
+	err := drawText(equation, img, options)
+	if err != nil {
 		return nil, err
 	}
 
 	return &Data{Text: text, img: img}, nil
 }
 
-// NewCustomGenerator creates a new captcha based on a custom text generator.
-func NewCustomGenerator(
-	width int, height int, generator func() (anwser string, question string), option ...SetOption,
-) (*Data, error) {
-	options := newDefaultOption(width, height)
-	for _, setOption := range option {
-		setOption(options)
-	}
-
-	answer, question := generator()
-	img := image.NewNRGBA(image.Rect(0, 0, width, height))
-	if err := drawWithOption(question, img, options); err != nil {
-		return nil, err
-	}
-
-	return &Data{Text: answer, img: img}, nil
-}
-
-func drawWithOption(text string, img *image.NRGBA, options *Options) error {
-	draw.Draw(img, img.Bounds(), &image.Uniform{options.BackgroundColor}, image.Point{}, draw.Src)
-	drawNoise(img, options)
-	drawCurves(img, options)
-	return drawText(text, img, options)
-}
-
 func randomText(opts *Options) (text string) {
-	n := len([]rune(opts.CharPreset))
+	n := len(opts.CharPreset)
 	for i := 0; i < opts.TextLength; i++ {
-		text += string([]rune(opts.CharPreset)[rand.Intn(n)])
+		text += string(opts.CharPreset[rand.Intn(n)])
 	}
 
 	return text

captcha_test.go

@@ -69,12 +69,6 @@ func TestNewCaptchaOptions(t *testing.T) {
 	NewMathExpr(100, 34, func(options *Options) {
 		options.BackgroundColor = color.Black
 	})
-
-	NewCustomGenerator(100, 34, func() (anwser string, question string) {
-		return "4", "2x2?"
-	}, func(o *Options) {
-		o.BackgroundColor = color.Black
-	})
 }
 
 func TestNewMathExpr(t *testing.T) {
@@ -84,15 +78,6 @@ func TestNewMathExpr(t *testing.T) {
 	}
 }
 
-func TestNewCustomGenerator(t *testing.T) {
-	_, err := NewCustomGenerator(150, 50, func() (anwser string, question string) {
-		return "1", "2"
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
 func TestNilFontError(t *testing.T) {
 	temp := ttfFont
 	ttfFont = nil
@@ -107,13 +92,6 @@ func TestNilFontError(t *testing.T) {
 		t.Fatal("Expect to get nil font error")
 	}
 
-	_, err = NewCustomGenerator(150, 50, func() (anwser string, question string) {
-		return "1", "2"
-	})
-	if err == nil {
-		t.Fatal("Expect to get nil font error")
-	}
-
 	ttfFont = temp
 }
 

example/basic/go.mod

@@ -1,7 +1,7 @@
-module concord.hectabit.org/HectaBit/captcha/example/basic
+module github.com/steambap/captcha/example/basic
 
 go 1.12
 
-replace concord.hectabit.org/HectaBit/captcha => ../../
+replace github.com/steambap/captcha => ../../
 
-require concord.hectabit.org/HectaBit/captcha v0.0.0-00010101000000-000000000000
+require github.com/steambap/captcha v0.0.0-00010101000000-000000000000

go.mod

@@ -1,8 +1,8 @@
-module concord.hectabit.org/HectaBit/captcha
+module github.com/steambap/captcha
 
-go 1.20
+go 1.16
 
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	golang.org/x/image v0.15.0
+	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
 )

go.sum

@@ -1,4 +1,6 @@
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
-golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
+golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d h1:RNPAfi2nHY7C2srAV8A49jpsYr0ADedCk1wq6fTMTvs=
+golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=