首次提交：初始化项目代码

internal/application/captcha/service.go

@@ -0,0 +1,40 @@
+package captcha
+
+import (
+	"bytes"
+
+	"cloudnest/internal/infrastructure/database"
+	"github.com/dchest/captcha"
+)
+
+type CaptchaService struct {
+	redis *database.RedisClient
+}
+
+func NewCaptchaService(redis *database.RedisClient) *CaptchaService {
+	captcha.SetCustomStore(captcha.NewMemoryStore(100, 5*60*1e9))
+	return &CaptchaService{redis: redis}
+}
+
+func (s *CaptchaService) Generate() (captchaID string, imageBytes []byte, err error) {
+	captchaID = captcha.New()
+
+	var buf bytes.Buffer
+	if err = captcha.WriteImage(&buf, captchaID, 240, 80); err != nil {
+		return "", nil, err
+	}
+
+	return captchaID, buf.Bytes(), nil
+}
+
+func (s *CaptchaService) GetImage(captchaID string) ([]byte, error) {
+	var buf bytes.Buffer
+	if err := captcha.WriteImage(&buf, captchaID, 240, 80); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+func (s *CaptchaService) Verify(captchaID, answer string) bool {
+	return captcha.VerifyString(captchaID, answer)
+}