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4ed43c2a32
## Summary This PR fixes #36255 The image captcha was using random colors which often resulted in poor contrast against dark backgrounds, making it difficult or impossible for users to read in dark mode. ## Changes - Added a custom color palette to the image captcha configuration in `services/context/captcha.go` - The palette uses high-contrast colors (bright red, blue, green, yellow, purple, and dark blue-gray) that provide good visibility in both light and dark themes - This improves accessibility and user experience without changing any existing functionality ## Testing - Builds successfully - All existing tests pass - The color palette is properly supported by the upstream `gitea.com/go-chi/captcha` library --- Generated with Claude Code --------- Signed-off-by: majiayu000 <1835304752@qq.com> Co-authored-by: silverwind <me@silverwind.io>
104 lines
3.2 KiB
Go
104 lines
3.2 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package context
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import (
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"fmt"
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"image/color"
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"sync"
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/hcaptcha"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/mcaptcha"
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"code.gitea.io/gitea/modules/recaptcha"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/templates"
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"code.gitea.io/gitea/modules/turnstile"
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"gitea.com/go-chi/captcha"
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)
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var (
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imageCaptchaOnce sync.Once
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cpt *captcha.Captcha
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)
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// GetImageCaptcha returns global image captcha
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func GetImageCaptcha() *captcha.Captcha {
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imageCaptchaOnce.Do(func() {
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cpt = captcha.NewCaptcha(captcha.Options{
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SubURL: setting.AppSubURL,
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// Use a color palette with high contrast colors suitable for both light and dark modes
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// These colors provide good visibility and readability in both themes
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ColorPalette: color.Palette{
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color.RGBA{R: 234, G: 67, B: 53, A: 255}, // Bright red
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color.RGBA{R: 66, G: 133, B: 244, A: 255}, // Medium blue
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color.RGBA{R: 52, G: 168, B: 83, A: 255}, // Green
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color.RGBA{R: 251, G: 188, B: 5, A: 255}, // Yellow/gold
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color.RGBA{R: 171, G: 71, B: 188, A: 255}, // Purple
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},
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})
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cpt.Store = cache.GetCache().ChiCache()
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})
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return cpt
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}
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// SetCaptchaData sets common captcha data
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func SetCaptchaData(ctx *Context) {
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if !setting.Service.EnableCaptcha {
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return
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}
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ctx.Data["EnableCaptcha"] = setting.Service.EnableCaptcha
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ctx.Data["RecaptchaURL"] = setting.Service.RecaptchaURL
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ctx.Data["Captcha"] = GetImageCaptcha()
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ctx.Data["CaptchaType"] = setting.Service.CaptchaType
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ctx.Data["RecaptchaSitekey"] = setting.Service.RecaptchaSitekey
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ctx.Data["HcaptchaSitekey"] = setting.Service.HcaptchaSitekey
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ctx.Data["McaptchaSitekey"] = setting.Service.McaptchaSitekey
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ctx.Data["McaptchaURL"] = setting.Service.McaptchaURL
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ctx.Data["CfTurnstileSitekey"] = setting.Service.CfTurnstileSitekey
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}
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const (
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gRecaptchaResponseField = "g-recaptcha-response"
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hCaptchaResponseField = "h-captcha-response"
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mCaptchaResponseField = "m-captcha-response"
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cfTurnstileResponseField = "cf-turnstile-response"
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)
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// VerifyCaptcha verifies Captcha data
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// No-op if captchas are not enabled
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func VerifyCaptcha(ctx *Context, tpl templates.TplName, form any) {
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if !setting.Service.EnableCaptcha {
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return
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}
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var valid bool
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var err error
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switch setting.Service.CaptchaType {
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case setting.ImageCaptcha:
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valid = GetImageCaptcha().VerifyReq(ctx.Req)
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case setting.ReCaptcha:
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valid, err = recaptcha.Verify(ctx, ctx.Req.Form.Get(gRecaptchaResponseField))
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case setting.HCaptcha:
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valid, err = hcaptcha.Verify(ctx, ctx.Req.Form.Get(hCaptchaResponseField))
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case setting.MCaptcha:
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valid, err = mcaptcha.Verify(ctx, ctx.Req.Form.Get(mCaptchaResponseField))
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case setting.CfTurnstile:
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valid, err = turnstile.Verify(ctx, ctx.Req.Form.Get(cfTurnstileResponseField))
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default:
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ctx.ServerError("Unknown Captcha Type", fmt.Errorf("unknown Captcha Type: %s", setting.Service.CaptchaType))
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return
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}
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if err != nil {
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log.Debug("Captcha Verify failed: %v", err)
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}
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if !valid {
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ctx.Data["Err_Captcha"] = true
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ctx.RenderWithErr(ctx.Tr("form.captcha_incorrect"), tpl, form)
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}
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}
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