web/template/admin/login.html

{{/* 管理员登录页面模板：使用layui构建的登录界面 */}}
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <title>{{ .Title }}</title>
    <!-- 站点图标 -->
    <link rel="icon" type="image/svg+xml" href="/assets/favicon.svg" />
    <link rel="shortcut icon" href="/favicon.ico" />
    <!-- 请勿在项目正式环境中引用该 layui.css 地址 -->
    <link href="//unpkg.com/layui@2.12.1/dist/css/layui.css" rel="stylesheet">
    <style>
        body {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .demo-login-container {
            width: 400px;
            margin: 21px auto 0;
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .login-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 30px 20px;
            text-align: center;
            color: #fff;
        }

        .login-header h1 {
            margin: 0;
            font-size: 24px;
            font-weight: 300;
        }

        .login-header p {
            margin: 8px 0 0;
            opacity: 0.8;
            font-size: 14px;
        }

        .login-form {
            padding: 30px 20px;
        }

        /* 调整表单项间距 */
        .login-form .layui-form-item {
            margin-bottom: 20px;
        }

        /* 最后一个表单项不需要底部边距 */
        .login-form .layui-form-item:last-child {
            margin-bottom: 0;
        }

        .demo-login-other .layui-icon {
            position: relative;
            display: inline-block;
            margin: 0 2px;
            top: 2px;
            font-size: 26px;
        }

        .login-footer {
            text-align: center;
            padding: 20px;
            color: #999;
            font-size: 12px;
            border-top: 1px solid #f0f0f0;
        }

        /* 响应式设计 - 移动端适配 */
        @media (max-width: 768px) {
            .demo-login-container {
                width: 90%;
                margin: 10px auto;
                border-radius: 4px;
            }

            .login-header {
                padding: 25px 15px;
            }

            .login-header h1 {
                font-size: 20px;
            }

            .login-form {
                padding: 25px 15px;
            }

            /* 移动端表单项间距调整 */
            .login-form .layui-form-item {
                margin-bottom: 18px;
            }
        }

        @media (max-width: 480px) {
            .demo-login-container {
                width: 95%;
                margin: 5px auto;
                border-radius: 0;
                min-height: calc(100vh - 10px);
                display: flex;
                flex-direction: column;
            }

            .login-header {
                padding: 20px 15px;
            }

            .login-header h1 {
                font-size: 18px;
            }

            .login-form {
                padding: 20px 15px;
            }

            /* 小屏幕表单项间距调整 */
            .login-form .layui-form-item {
                margin-bottom: 16px;
                flex: 1;
                display: flex;
                flex-direction: column;
                justify-content: center;
            }
        }
    </style>
</head>

<body>
    <form class="layui-form">
        <div class="demo-login-container">
            <div class="login-header">
                <h1>{{ .SystemName }}</h1>
                <p>管理员登录</p>
            </div>

            <div class="login-form">
                <!-- CSRF令牌隐藏字段 -->
                <input type="hidden" name="csrf_token" value="{{ .CSRFToken }}" id="csrf-token">
                
                <div class="layui-form-item">
                    <div class="layui-input-wrap">
                        <div class="layui-input-prefix">
                            <i class="layui-icon layui-icon-username"></i>
                        </div>
                        <input type="text" name="username" value="" lay-verify="required" placeholder="用户名"
                            lay-reqtext="请填写用户名" autocomplete="off" class="layui-input" lay-affix="clear">
                    </div>
                </div>

                <div class="layui-form-item">
                    <div class="layui-input-wrap">
                        <div class="layui-input-prefix">
                            <i class="layui-icon layui-icon-password"></i>
                        </div>
                        <input type="password" name="password" value="" lay-verify="required" placeholder="密   码"
                            lay-reqtext="请填写密码" autocomplete="off" class="layui-input" lay-affix="eye">
                    </div>
                </div>

                <div class="layui-form-item">
                    <div class="layui-row">
                        <div class="layui-col-xs7">
                            <div class="layui-input-wrap">
                                <div class="layui-input-prefix">
                                    <i class="layui-icon layui-icon-vercode"></i>
                                </div>
                                <input type="text" name="captcha" value="" lay-verify="required" placeholder="验证码"
                                    lay-reqtext="请填写验证码" autocomplete="off" class="layui-input" lay-affix="clear">
                            </div>
                        </div>
                        <div class="layui-col-xs5">
                            <div style="margin-left: 5px; text-align: right;">
                                <img id="captcha-img" src="/admin/captcha"
                                    onclick="this.src='/admin/captcha?t='+ new Date().getTime();"
                                    style="cursor: pointer; height: 38px; border-radius: 4px; width: 100%;"
                                    title="点击刷新验证码">
                            </div>
                        </div>
                    </div>
                </div>

                <div class="layui-form-item">
                    <button class="layui-btn layui-btn-fluid" lay-submit lay-filter="demo-login">立即登录</button>
                </div>
            </div>

            <div class="login-footer">
                <p>{{ .FooterText }}</p>
            </div>
        </div>
    </form>

    <!-- 请勿在项目正式环境中引用该 layui.js 地址 -->
    <script src="//unpkg.com/layui@2.12.1/dist/layui.js"></script>
    <script>
        layui.use(function () {
            var form = layui.form;
            var layer = layui.layer;

            // 登录提交回调：向 /admin/login 发送请求，并依据 code===0 判断成功与否
            form.on('submit(demo-login)', function (data) {
                var loadIndex = layer.load(1, {
                    shade: [0.1, '#fff']
                });

                // 获取CSRF令牌
                var csrfToken = document.getElementById('csrf-token').value;

                // 发送登录请求
                fetch('/admin/login', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                        'X-CSRF-Token': csrfToken
                    },
                    body: JSON.stringify(data.field)
                })
                    .then(response => response.json())
                    .then(result => {
                        layer.close(loadIndex);

                        // 根据统一接口：code === 0 表示成功
                        const isOk = result && result.code === 0;
                        if (isOk) {
                            layer.msg('登录成功', {
                                icon: 1,
                                time: 1500
                            }, function () {
                                const redirect = (result.data && result.data.redirect) || '/admin';
                                window.location.href = redirect;
                            });
                        } else {
                            const msg = (result && (result.msg || result.message)) || '登录失败，请检查用户名和密码';
                            layer.msg(msg, { icon: 2 });

                            // 登录失败时刷新验证码
                            document.getElementById('captcha-img').src = '/admin/captcha?t=' + new Date().getTime();
                        }
                    })
                    .catch(error => {
                        layer.close(loadIndex);
                        console.error('登录错误:', error);
                        layer.msg('网络错误，请稍后重试', { icon: 2 });

                        // 网络错误时也刷新验证码
                        document.getElementById('captcha-img').src = '/admin/captcha?t=' + new Date().getTime();
                    });

                return false; // 阻止表单跳转
            });
        });
    </script>
</body>

</html>