V1.0.0: 基于索引的知识检索系统
核心功能: - 文档索引：使用LLM分析提取关键词/摘要/主题/实体 - 查询处理：LLM分析查询意图并扩展关键词 - BM25检索：基于倒排索引的相关性排序 - RAG问答：检索增强生成 技术栈: - Flask + SQLAlchemy - OpenAI API兼容LLM - BM25算法 特点: 不依赖向量模型和向量库
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templates/search.html
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195
templates/search.html
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<!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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<title>知识检索 - LLM Index RAG</title>
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
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<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
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<style>
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body { background-color: #f8f9fa; }
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.search-box { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); padding: 40px 0; }
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.search-input { font-size: 1.2rem; border-radius: 10px; }
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.result-card { border-radius: 10px; border-left: 4px solid #667eea; transition: all 0.3s; }
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.result-card:hover { transform: translateX(5px); }
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.rag-answer { background: linear-gradient(to right, #f8f9fa, #e9ecef); border-radius: 10px; }
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.source-badge { font-size: 0.75rem; }
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</style>
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</head>
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<body>
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<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
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<div class="container">
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<a class="navbar-brand" href="/"><i class="bi bi-search"></i> LLM Index RAG</a>
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<div class="navbar-nav ms-auto">
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<a class="nav-link" href="/">首页</a>
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<a class="nav-link" href="/documents">文档管理</a>
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<a class="nav-link active" href="/search">知识检索</a>
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</div>
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</div>
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</nav>
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<!-- 搜索框 -->
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<div class="search-box">
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<div class="container">
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<div class="row justify-content-center">
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<div class="col-md-8">
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<form id="searchForm">
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<div class="input-group input-group-lg">
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<input type="text" class="form-control search-input" id="queryInput"
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placeholder="输入您的问题或关键词..." autocomplete="off">
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<button class="btn btn-light" type="submit">
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<i class="bi bi-search"></i>
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</button>
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</div>
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<div class="mt-3 text-white">
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<div class="form-check form-check-inline">
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<input class="form-check-input" type="radio" name="mode" id="modeSearch" value="search" checked>
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<label class="form-check-label" for="modeSearch">文档检索</label>
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</div>
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<div class="form-check form-check-inline">
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<input class="form-check-input" type="radio" name="mode" id="modeRAG" value="rag">
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<label class="form-check-label" for="modeRAG">智能问答</label>
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</div>
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</div>
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</form>
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</div>
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</div>
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</div>
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</div>
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<!-- 结果区域 -->
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<div class="container mt-4">
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<!-- 加载中 -->
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<div id="loadingSection" style="display:none;" class="text-center py-4">
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<div class="spinner-border text-primary" role="status"></div>
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<p class="mt-2">正在检索...</p>
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</div>
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<!-- RAG回答 -->
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<div id="ragSection" style="display:none;">
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<h5><i class="bi bi-chat-dots-fill"></i> 智能回答</h5>
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<div id="ragAnswer" class="card rag-answer p-4 mb-4"></div>
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<h6><i class="bi bi-book"></i> 参考来源</h6>
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<div id="ragSources"></div>
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</div>
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<!-- 搜索结果 -->
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<div id="resultsSection" style="display:none;">
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<div class="d-flex justify-content-between align-items-center mb-3">
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<h5><i class="bi bi-list-ul"></i> 检索结果</h5>
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<span id="resultCount" class="badge bg-primary"></span>
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</div>
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<div id="resultsContainer"></div>
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</div>
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</div>
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<script>
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document.getElementById('searchForm').addEventListener('submit', function(e) {
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e.preventDefault();
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const query = document.getElementById('queryInput').value.trim();
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const mode = document.querySelector('input[name="mode"]:checked').value;
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if (!query) return;
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// 显示加载
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document.getElementById('loadingSection').style.display = 'block';
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document.getElementById('ragSection').style.display = 'none';
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document.getElementById('resultsSection').style.display = 'none';
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if (mode === 'rag') {
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// RAG问答
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fetch('/api/rag/answer', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({query: query})
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})
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.then(r => r.json())
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.then(data => {
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document.getElementById('loadingSection').style.display = 'none';
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document.getElementById('ragSection').style.display = 'block';
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// 显示回答
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document.getElementById('ragAnswer').innerHTML = `
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<div class="d-flex align-items-start">
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<i class="bi bi-robot fs-4 me-3 text-primary"></i>
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<div>${data.answer.replace(/\n/g, '<br>')}</div>
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</div>
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<div class="mt-3 text-muted small">
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<i class="bi bi-speedometer2"></i> 置信度: ${(data.confidence * 100).toFixed(0)}%
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</div>
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`;
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// 显示来源
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let sourcesHtml = '<div class="row">';
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data.sources.forEach((s, i) => {
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sourcesHtml += `
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<div class="col-md-4 mb-3">
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<div class="card result-card">
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<div class="card-body">
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<h6 class="card-title">${s.title}</h6>
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<small class="text-muted">相关度: ${s.score.toFixed(2)}</small>
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</div>
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</div>
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</div>
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`;
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});
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sourcesHtml += '</div>';
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document.getElementById('ragSources').innerHTML = sourcesHtml;
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});
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} else {
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// 文档检索
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fetch('/api/search', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({query: query, top_k: 10})
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})
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.then(r => r.json())
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.then(data => {
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document.getElementById('loadingSection').style.display = 'none';
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document.getElementById('resultsSection').style.display = 'block';
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document.getElementById('resultCount').textContent = `共 ${data.total} 条结果`;
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let html = '';
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data.results.forEach((r, i) => {
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const chunks = r.matched_chunks.map(c =>
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`<div class="bg-light p-2 rounded small mb-1">${c.content || c.summary || ''}</div>`
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).join('');
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html += `
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<div class="card result-card mb-3">
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<div class="card-body">
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<div class="d-flex justify-content-between">
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<h6 class="card-title">${r.doc.title || r.doc.filename}</h6>
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<span class="badge bg-primary">${r.score.toFixed(2)}</span>
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</div>
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<div class="mb-2">
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${r.matched_terms.map(t => `<span class="source-badge bg-info text-white px-2 py-1 rounded me-1">${t}</span>`).join('')}
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</div>
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<div class="mt-2">
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${chunks}
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</div>
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</div>
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</div>
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`;
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});
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document.getElementById('resultsContainer').innerHTML = html || '<p class="text-muted">没有找到相关文档</p>';
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});
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}
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});
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// 自动补全
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document.getElementById('queryInput').addEventListener('input', function() {
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const prefix = this.value;
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if (prefix.length < 2) return;
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fetch(`/api/search/suggestions?prefix=${encodeURIComponent(prefix)}`)
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.then(r => r.json())
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.then(data => {
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// 简单显示建议（可改用自动补全组件）
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console.log('建议:', data.suggestions);
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});
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});
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</script>
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</body>
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</html>
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