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Install-Package Lazy.Captcha.Core
builder.Services.AddCaptcha();
自定义注册服务
- // 注册服务的时候增加配置
- services.AddCaptcha(Configuration, option =>
- {
- option.CaptchaType = CaptchaType.WORD; // 验证码类型
- option.CodeLength = 6; // 验证码长度, 要放在CaptchaType设置后. 当类型为算术表达式时,长度代表操作的个数
- option.ExpirySeconds = 30; // 验证码过期时间
- option.IgnoreCase = true; // 比较时是否忽略大小写
- option.StoreageKeyPrefix = ""; // 存储键前缀
-
- option.ImageOption.Animation = true; // 是否启用动画
- option.ImageOption.FrameDelay = 30; // 每帧延迟,Animation=true时有效, 默认30
-
- option.ImageOption.Width = 150; // 验证码宽度
- option.ImageOption.Height = 50; // 验证码高度
- option.ImageOption.BackgroundColor = SkiaSharp.SKColors.White; // 验证码背景色
-
- option.ImageOption.BubbleCount = 2; // 气泡数量
- option.ImageOption.BubbleMinRadius = 5; // 气泡最小半径
- option.ImageOption.BubbleMaxRadius = 15; // 气泡最大半径
- option.ImageOption.BubbleThickness = 1; // 气泡边沿厚度
-
- option.ImageOption.InterferenceLineCount = 2; // 干扰线数量
-
- option.ImageOption.FontSize = 36; // 字体大小
- option.ImageOption.FontFamily = DefaultFontFamilys.Instance.Actionj; // 字体
-
- /*
- * 中文使用kaiti,其他字符可根据喜好设置(可能部分转字符会出现绘制不出的情况)。
- * 当验证码类型为“ARITHMETIC”时,不要使用“Ransom”字体。(运算符和等号绘制不出来)
- */
-
- option.ImageOption.TextBold = true;// 粗体,该配置2.0.3新增
- });
提供一个生成验证码和校验的接口
- /// <summary>
- /// 生成验证码
- /// </summary>
- /// <param name="id"></param>
- /// <returns></returns>
- [HttpGet]
- public IActionResult Captcha(string id)
- {
- var info = _captcha.Generate(id);
- // 有多处验证码且过期时间不一样,可传第二个参数覆盖默认配置。
- //var info = _captcha.Generate(id,120);
- var stream = new MemoryStream(info.Bytes);
- return File(stream, "image/gif");
- }
- /// <summary>
- /// 验证验证码是否输入正确
- /// </summary>
- [HttpGet]
- public bool Validate(string id, string code)
- {
- return _captcha.Validate(id, code);
- }
前端部分
-
- <div class="text-center">
- <img id="captchaImage" src="" alt="Captcha Image" />
- <input type="text" id="captchaInput" placeholder="Enter the captcha code" />
- <button id="validateButton">Validate</button>
- <div id="resultMessage"></div>
- </div>
- <script>
- document.addEventListener('DOMContentLoaded', function () {
- var guid = generateUUIDv4();
- // 加载验证码图片
- loadCaptcha();
-
- // 监听验证按钮点击事件
- document.getElementById('validateButton').addEventListener('click', validateCaptcha);
- // 点击图片刷新验证码
- document.getElementById('captchaImage').addEventListener('click', captchaImageClick);
-
- async function captchaImageClick() {
- //刷新GUID
- guid = generateUUIDv4();
- // 重新加载验证码
- loadCaptcha();
- }
- async function loadCaptcha() {
- try {
- const response = await fetch('/home/Captcha?id=' + guid);
- const blob = await response.blob();
- const imageUrl = URL.createObjectURL(blob);
- document.getElementById('captchaImage').src = imageUrl;
- } catch (error) {
- console.error('Failed to load captcha:', error);
- }
- }
- async function validateCaptcha() {
- const input = document.getElementById('captchaInput').value;
- const response = await fetch('/home/Validate?id=' + guid + "&code=" + input);
-
- const data = await response.json();
- const messageElement = document.getElementById('resultMessage');
-
- if (data) {
- messageElement.textContent = 'Captcha is correct!';
- messageElement.style.color = 'green';
- } else {
- messageElement.textContent = 'Incorrect captcha. Please try again.';
- messageElement.style.color = 'red';
- //刷新GUID
- guid = generateUUIDv4();
- // 重新加载验证码
- loadCaptcha();
- }
- }
- function generateUUIDv4() {
- return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
- var r = Math.random() * 16 | 0,
- v = c === 'x' ? r : (r & 0x3 | 0x8);
- return v.toString(16);
- });
- }
- });
- </script>
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