396 lines
12 KiB
HTML
396 lines
12 KiB
HTML
<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>流式输出测试页面</title>
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<style>
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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body {
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font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
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'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
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sans-serif;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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min-height: 100vh;
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padding: 20px;
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display: flex;
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justify-content: center;
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align-items: center;
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}
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.container {
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background: white;
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border-radius: 16px;
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padding: 40px;
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box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
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max-width: 800px;
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width: 100%;
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}
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h1 {
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text-align: center;
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color: #333;
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margin-bottom: 30px;
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font-size: 2.5rem;
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font-weight: 700;
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}
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.controls {
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display: flex;
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gap: 15px;
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margin-bottom: 30px;
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justify-content: center;
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flex-wrap: wrap;
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}
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button {
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background: #667eea;
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color: white;
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border: none;
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padding: 12px 24px;
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border-radius: 8px;
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font-size: 16px;
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font-weight: 600;
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cursor: pointer;
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transition: all 0.3s ease;
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}
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button:hover {
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background: #5a67d8;
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transform: translateY(-2px);
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}
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button:active {
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transform: translateY(0);
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}
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button:disabled {
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background: #a0aec0;
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cursor: not-allowed;
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transform: none;
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}
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.stream-output {
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background: #f7fafc;
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border: 2px solid #e2e8f0;
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border-radius: 12px;
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padding: 24px;
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min-height: 400px;
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max-height: 600px;
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overflow-y: auto;
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font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
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font-size: 16px;
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line-height: 1.8;
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color: #2d3748;
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white-space: pre-wrap;
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word-break: break-word;
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}
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.stream-output::-webkit-scrollbar {
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width: 8px;
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}
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.stream-output::-webkit-scrollbar-track {
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background: #edf2f7;
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border-radius: 4px;
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}
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.stream-output::-webkit-scrollbar-thumb {
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background: #cbd5e0;
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border-radius: 4px;
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}
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.stream-output::-webkit-scrollbar-thumb:hover {
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background: #a0aec0;
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}
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.stats {
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margin-top: 20px;
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padding: 15px;
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background: #edf2f7;
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border-radius: 8px;
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font-size: 14px;
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color: #4a5568;
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display: flex;
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justify-content: space-between;
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flex-wrap: wrap;
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gap: 10px;
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}
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.stats-item {
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display: flex;
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align-items: center;
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gap: 5px;
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}
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.loading-dots {
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display: inline-block;
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}
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.loading-dots::after {
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content: '.';
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animation: dots 1s steps(5, end) infinite;
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}
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@keyframes dots {
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0%, 20% { content: '.'; }
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40% { content: '..'; }
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60% { content: '...'; }
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80%, 100% { content: '.'; }
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>✨ 流式输出测试</h1>
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<div class="controls">
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<button id="startBtn">开始流式输出</button>
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<button id="stopBtn" disabled>停止输出</button>
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<button id="clearBtn">清空内容</button>
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</div>
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<div id="output" class="stream-output">
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<div style="color: #718096;">点击上方按钮开始测试流式输出...</div>
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</div>
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<div class="stats">
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<div class="stats-item">
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<span>状态:</span>
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<span id="status" style="font-weight: 600;">就绪</span>
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</div>
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<div class="stats-item">
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<span>字符数:</span>
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<span id="charCount">0</span>
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</div>
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<div class="stats-item">
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<span>耗时:</span>
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<span id="timeElapsed">0.00s</span>
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</div>
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</div>
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</div>
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<script>
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// 页面元素
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const startBtn = document.getElementById('startBtn');
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const stopBtn = document.getElementById('stopBtn');
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const clearBtn = document.getElementById('clearBtn');
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const output = document.getElementById('output');
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const statusEl = document.getElementById('status');
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const charCountEl = document.getElementById('charCount');
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const timeElapsedEl = document.getElementById('timeElapsed');
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// 状态变量
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let controller = null;
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let startTime = 0;
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let charCount = 0;
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let timer = null;
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// 模拟大模型输出的文本内容
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const sampleText = `欢迎使用流式输出测试页面！
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这是一个模拟大语言模型生成内容的演示。
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流式输出是一种将生成的内容逐字逐句发送给用户的技术，
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它可以显著提升用户体验，让用户感觉内容是实时生成的。
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在实际应用中，大语言模型会在生成每个token后立即发送给客户端，
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而不需要等待整个响应完成。
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这种技术特别适合：
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- 长文本生成
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- 对话系统
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- 代码生成
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- 实时翻译
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流式输出的优势包括：
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1. 更快的感知响应速度
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2. 更好的用户体验
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3. 更低的内存占用
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4. 支持更长的内容生成
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在这个测试中，我们将模拟每秒生成约50个字符的速度，
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您可以看到文本是如何逐字逐句显示的。
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您可以随时点击"停止输出"按钮来中断流式传输，
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也可以点击"清空内容"按钮重新开始。
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让我们继续探索流式输出的更多应用场景...
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在Web应用中，流式输出通常使用以下技术实现：
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- Server-Sent Events (SSE)
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- WebSockets
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- HTTP/2 Server Push
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每种技术都有其优缺点，选择合适的技术取决于具体的应用场景。
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例如，SSE适合单向的服务器到客户端通信，
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而WebSockets适合双向通信。
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流式输出不仅提升了用户体验，
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也为开发者提供了更多的灵活性和控制能力。
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感谢您使用这个测试页面！
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希望您对流式输出技术有了更深入的了解。
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如果您有任何问题或建议，欢迎随时提出。
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祝您使用愉快！`;
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// 更新统计信息
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function updateStats() {
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charCountEl.textContent = charCount;
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if (startTime > 0) {
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const elapsed = (Date.now() - startTime) / 1000;
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timeElapsedEl.textContent = elapsed.toFixed(2) + 's';
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}
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}
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// 清空输出
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function clearOutput() {
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output.innerHTML = '<div style="color: #718096;">点击上方按钮开始测试流式输出...</div>';
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charCount = 0;
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updateStats();
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statusEl.textContent = '就绪';
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}
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// 模拟流式输出
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async function simulateStreaming() {
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startBtn.disabled = true;
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stopBtn.disabled = false;
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clearOutput();
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output.textContent = '';
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statusEl.innerHTML = '生成中 <span class="loading-dots"></span>';
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startTime = Date.now();
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charCount = 0;
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// 创建AbortController用于取消操作
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controller = new AbortController();
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const signal = controller.signal;
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try {
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// 使用ReadableStream模拟流式输出
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const stream = new ReadableStream({
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async start(controller) {
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let index = 0;
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while (index < sampleText.length && !signal.aborted) {
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// 随机延迟，模拟真实生成速度
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const delay = Math.random() * 80 + 40; // 40-120ms
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await new Promise(resolve => setTimeout(resolve, delay));
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// 每次发送1-5个字符
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const chunkSize = Math.floor(Math.random() * 5) + 1;
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const chunk = sampleText.slice(index, index + chunkSize);
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controller.enqueue(new TextEncoder().encode(chunk));
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index += chunkSize;
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// 更新统计信息
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charCount += chunk.length;
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updateStats();
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}
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controller.close();
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},
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cancel() {
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console.log('流式输出已取消');
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}
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});
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// 读取并显示流内容
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const reader = stream.getReader();
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const decoder = new TextDecoder();
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while (true) {
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const { done, value } = await reader.read();
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if (done) break;
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// 追加内容到输出
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output.textContent += decoder.decode(value, { stream: true });
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// 自动滚动到底部
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output.scrollTop = output.scrollHeight;
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}
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// 完成
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statusEl.textContent = '完成';
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output.style.borderColor = '#48bb78';
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// 添加完成标记
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const doneMarker = document.createElement('div');
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doneMarker.style.cssText = `
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margin-top: 20px;
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padding: 10px;
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background: #48bb78;
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color: white;
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border-radius: 6px;
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text-align: center;
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font-weight: 600;
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`;
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doneMarker.textContent = '✅ 流式输出完成！';
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output.appendChild(doneMarker);
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} catch (error) {
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if (error.name === 'AbortError') {
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statusEl.textContent = '已停止';
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output.style.borderColor = '#ed8936';
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const stopMarker = document.createElement('div');
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stopMarker.style.cssText = `
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margin-top: 20px;
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padding: 10px;
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background: #ed8936;
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color: white;
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border-radius: 6px;
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text-align: center;
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font-weight: 600;
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`;
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stopMarker.textContent = '⏸️ 流式输出已停止';
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output.appendChild(stopMarker);
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} else {
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statusEl.textContent = '错误';
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output.innerHTML += `\n\n❌ 发生错误: ${error.message}`;
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output.style.borderColor = '#f56565';
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}
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} finally {
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// 重置状态
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startBtn.disabled = false;
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stopBtn.disabled = true;
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controller = null;
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if (timer) {
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clearInterval(timer);
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timer = null;
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}
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}
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}
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// 停止流式输出
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function stopStreaming() {
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if (controller) {
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controller.abort();
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controller = null;
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}
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}
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// 事件监听器
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startBtn.addEventListener('click', simulateStreaming);
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stopBtn.addEventListener('click', stopStreaming);
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clearBtn.addEventListener('click', clearOutput);
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// 页面加载完成
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window.addEventListener('load', () => {
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console.log('流式输出测试页面已加载');
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});
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</script>
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</body>
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</html> |