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<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>登录 - 局域网聊天室</title>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v6.4.0/css/all.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.css">
<style>
:root {
--primary-color: #667eea;
--secondary-color: #764ba2;
--background-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
--success-color: #4ade80;
--error-color: #ef4444;
--text-dark: #1f2937;
--text-light: #6b7280;
--border-color: #e5e7eb;
--shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
background: var(--background-gradient);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 20px;
}
.login-container {
background: white;
border-radius: 24px;
box-shadow: var(--shadow);
padding: 48px;
width: 100%;
max-width: 480px;
position: relative;
overflow: hidden;
}
.login-container::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
height: 6px;
background: var(--background-gradient);
}
.login-header {
text-align: center;
margin-bottom: 40px;
}
.login-header h1 {
color: var(--text-dark);
font-size: 2rem;
font-weight: 700;
margin-bottom: 8px;
}
.login-header p {
color: var(--text-light);
font-size: 1rem;
line-height: 1.5;
}
.form-group {
margin-bottom: 24px;
}
label {
display: block;
color: var(--text-dark);
font-weight: 500;
margin-bottom: 8px;
font-size: 0.95rem;
}
.input-wrapper {
position: relative;
}
input[type="text"] {
width: 100%;
padding: 16px 20px 16px 48px;
border: 2px solid var(--border-color);
border-radius: 12px;
font-size: 1rem;
transition: all 0.3s ease;
background: #fafafa;
color: var(--text-dark);
}
input[type="text"]:focus {
outline: none;
border-color: var(--primary-color);
background: white;
box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}
.input-icon {
position: absolute;
left: 16px;
top: 50%;
transform: translateY(-50%);
color: var(--text-light);
font-size: 1.1rem;
}
.login-btn {
width: 100%;
padding: 16px;
background: var(--background-gradient);
color: white;
border: none;
border-radius: 12px;
font-size: 1rem;
font-weight: 600;
cursor: pointer;
transition: all 0.3s ease;
position: relative;
overflow: hidden;
}
.login-btn:hover {
transform: translateY(-2px);
box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}
.login-btn:active {
transform: translateY(0);
}
.login-btn:disabled {
opacity: 0.6;
cursor: not-allowed;
transform: none;
}
.loading-spinner {
display: none;
width: 20px;
height: 20px;
border: 2px solid rgba(255, 255, 255, 0.3);
border-radius: 50%;
border-top-color: white;
animation: spin 1s ease-in-out infinite;
margin-right: 8px;
}
@keyframes spin {
to { transform: rotate(360deg); }
}
.error-message {
background: #fef2f2;
border: 1px solid #fecaca;
color: var(--error-color);
padding: 12px 16px;
border-radius: 8px;
margin-bottom: 24px;
font-size: 0.9rem;
display: none;
}
.back-link {
text-align: center;
margin-top: 32px;
padding-top: 24px;
border-top: 1px solid var(--border-color);
}
.back-link a {
color: var(--primary-color);
text-decoration: none;
font-weight: 500;
display: inline-flex;
align-items: center;
gap: 8px;
transition: color 0.3s ease;
}
.back-link a:hover {
color: var(--secondary-color);
}
.features {
margin-top: 32px;
padding-top: 24px;
border-top: 1px solid var(--border-color);
}
.feature-list {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 16px;
margin-top: 16px;
}
.feature-item {
display: flex;
align-items: center;
gap: 8px;
color: var(--text-light);
font-size: 0.9rem;
}
.feature-item i {
color: var(--success-color);
font-size: 1rem;
}
/* 移动端优化 */
@media (max-width: 480px) {
.login-container {
padding: 32px 24px;
border-radius: 16px;
}
.login-header h1 {
font-size: 1.75rem;
}
.feature-list {
grid-template-columns: 1fr;
}
}
/* 动画效果 */
.login-container {
animation: slideUp 0.6s ease-out;
}
@keyframes slideUp {
from {
opacity: 0;
transform: translateY(30px);
}
to {
opacity: 1;
transform: translateY(0);
}
}
/* 输入框动画 */
.input-wrapper {
animation: fadeIn 0.8s ease-out 0.2s both;
}
.login-btn {
animation: fadeIn 0.8s ease-out 0.4s both;
}
.back-link {
animation: fadeIn 0.8s ease-out 0.6s both;
}
@keyframes fadeIn {
from {
opacity: 0;
transform: translateY(20px);
}
to {
opacity: 1;
transform: translateY(0);
}
}
</style>
</head>
<body>
<div class="login-container">
<div class="login-header">
<h1><i class="bi bi-chat-dots-fill"></i> 局域网聊天室</h1>
<p>请输入您的用户名开始聊天</p>
</div>
<form id="loginForm">
<div class="error-message" id="errorMessage"></div>
<div class="form-group">
<label for="username">用户名</label>
<div class="input-wrapper">
<i class="bi bi-person-fill input-icon"></i>
<input
type="text"
id="username"
name="username"
placeholder="请输入用户名1-20个字符"
maxlength="20"
required
>
</div>
</div>
<button type="submit" class="login-btn" id="loginBtn">
<span class="loading-spinner" id="loadingSpinner"></span>
<span id="btnText">进入聊天室</span>
</button>
</form>
<div class="features">
<div class="feature-list">
<div class="feature-item">
<i class="bi bi-shield-check"></i>
<span>安全可靠</span>
</div>
<div class="feature-item">
<i class="bi bi-lightning-fill"></i>
<span>实时聊天</span>
</div>
<div class="feature-item">
<i class="bi bi-file-earmark-arrow-up"></i>
<span>文件传输</span>
</div>
<div class="feature-item">
<i class="bi bi-people-fill"></i>
<span>群聊私聊</span>
</div>
</div>
</div>
<div class="back-link">
<a href="/">
<i class="bi bi-arrow-left"></i>
返回文件传输
</a>
</div>
</div>
<script>
const loginForm = document.getElementById('loginForm');
const usernameInput = document.getElementById('username');
const loginBtn = document.getElementById('loginBtn');
const loadingSpinner = document.getElementById('loadingSpinner');
const btnText = document.getElementById('btnText');
const errorMessage = document.getElementById('errorMessage');
// 自动聚焦用户名输入框
usernameInput.focus();
// 表单提交处理
loginForm.addEventListener('submit', async (e) => {
e.preventDefault();
const username = usernameInput.value.trim();
if (!username) {
showError('请输入用户名');
return;
}
if (username.length > 20) {
showError('用户名长度不能超过20个字符');
return;
}
// 开始登录
setLoading(true);
hideError();
try {
const formData = new FormData();
formData.append('username', username);
const response = await fetch('/login', {
method: 'POST',
body: formData
});
const data = await response.json();
if (response.ok) {
// 登录成功保存session并跳转
localStorage.setItem('session_id', data.session_id);
localStorage.setItem('username', data.username);
// 跳转到聊天页面
window.location.href = '/chat';
} else {
showError(data.detail || '登录失败');
}
} catch (error) {
console.error('登录错误:', error);
showError('网络错误,请稍后重试');
} finally {
setLoading(false);
}
});
// 回车键提交
usernameInput.addEventListener('keypress', (e) => {
if (e.key === 'Enter') {
loginForm.dispatchEvent(new Event('submit'));
}
});
// 实时验证用户名长度
usernameInput.addEventListener('input', (e) => {
const value = e.target.value;
if (value.length > 20) {
showError('用户名长度不能超过20个字符');
} else {
hideError();
}
});
function setLoading(loading) {
loginBtn.disabled = loading;
loadingSpinner.style.display = loading ? 'inline-block' : 'none';
btnText.textContent = loading ? '登录中...' : '进入聊天室';
}
function showError(message) {
errorMessage.textContent = message;
errorMessage.style.display = 'block';
usernameInput.focus();
}
function hideError() {
errorMessage.style.display = 'none';
}
// 检查是否已经登录
window.addEventListener('load', async () => {
const sessionId = localStorage.getItem('session_id');
const username = localStorage.getItem('username');
if (sessionId && username) {
try {
const response = await fetch(`/check_session?session_id=${sessionId}`);
const data = await response.json();
if (data.valid) {
// 会话有效,直接跳转到聊天页面
window.location.href = '/chat';
return;
}
} catch (error) {
console.log('会话检查失败:', error);
}
// 清理无效的会话信息
localStorage.removeItem('session_id');
localStorage.removeItem('username');
}
});
</script>
</body>
</html>