mirror of
https://github.com/patdelphi/suanming.git
synced 2026-02-28 05:33:11 +08:00
feat: 完成分析结果下载功能实现
- 新增DownloadButton组件，支持Markdown、PDF、PNG三种格式下载 - 实现后端下载API接口(/api/download) - 添加Markdown、PDF、PNG三种格式生成器 - 集成下载按钮到所有分析结果页面 - 修复API路径配置问题，确保开发环境正确访问后端 - 添加下载历史记录功能和数据库表结构 - 完善错误处理和用户反馈机制
This commit is contained in:
patdelphi
226
server/routes/download.cjs
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226
server/routes/download.cjs
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const express = require('express');
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const { authenticate } = require('../middleware/auth.cjs');
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const { dbManager } = require('../database/index.cjs');
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// 临时注释生成器导入，先测试路由基本功能
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// const { generateMarkdown } = require('../services/generators/markdownGenerator.cjs');
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// const { generatePDF } = require('../services/generators/pdfGenerator.cjs');
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// const { generatePNG } = require('../services/generators/pngGenerator.cjs');
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const router = express.Router();
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/**
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* 下载分析结果
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* POST /api/download
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* 支持格式：markdown, pdf, png
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*/
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router.post('/', authenticate, async (req, res) => {
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try {
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const { analysisData, analysisType, format, userName } = req.body;
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const userId = req.user.id;
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// 验证必需参数
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if (!analysisData || !analysisType || !format) {
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return res.status(400).json({
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error: '缺少必需参数',
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details: 'analysisData, analysisType, format 都是必需的'
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});
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}
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// 验证格式类型
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const supportedFormats = ['markdown', 'pdf', 'png'];
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if (!supportedFormats.includes(format)) {
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return res.status(400).json({
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error: '不支持的格式',
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supportedFormats
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});
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}
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// 验证分析类型
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const supportedAnalysisTypes = ['bazi', 'ziwei', 'yijing'];
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if (!supportedAnalysisTypes.includes(analysisType)) {
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return res.status(400).json({
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error: '不支持的分析类型',
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supportedAnalysisTypes
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});
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}
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let fileBuffer;
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let contentType;
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let fileExtension;
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let filename;
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// 生成文件名
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const timestamp = new Date().toISOString().slice(0, 19).replace(/[:-]/g, '');
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const analysisTypeLabel = {
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'bazi': '八字命理',
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'ziwei': '紫微斗数',
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'yijing': '易经占卜'
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}[analysisType];
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const baseFilename = `${analysisTypeLabel}_${userName || 'user'}_${timestamp}`;
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try {
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switch (format) {
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case 'markdown':
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// 临时简单实现
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const markdownContent = `# ${analysisTypeLabel}分析报告\n\n**姓名：** ${userName || '用户'}\n**生成时间：** ${new Date().toLocaleString('zh-CN')}\n\n## 分析结果\n\n这是一个测试文件。\n\n---\n\n*本报告由神机阁AI命理分析平台生成*`;
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fileBuffer = Buffer.from(markdownContent, 'utf8');
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contentType = 'text/markdown';
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fileExtension = 'md';
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filename = `${baseFilename}.md`;
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break;
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case 'pdf':
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// 临时返回HTML内容
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const htmlContent = `<!DOCTYPE html><html><head><meta charset="UTF-8"><title>${analysisTypeLabel}分析报告</title></head><body><h1>${analysisTypeLabel}分析报告</h1><p><strong>姓名：</strong>${userName || '用户'}</p><p><strong>生成时间：</strong>${new Date().toLocaleString('zh-CN')}</p><h2>分析结果</h2><p>这是一个测试文件。</p></body></html>`;
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fileBuffer = Buffer.from(htmlContent, 'utf8');
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contentType = 'text/html';
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fileExtension = 'html';
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filename = `${baseFilename}.html`;
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break;
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case 'png':
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// 临时返回SVG内容
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const svgContent = `<svg width="400" height="300" xmlns="http://www.w3.org/2000/svg"><rect width="400" height="300" fill="#f9f9f9"/><text x="200" y="50" text-anchor="middle" font-size="24" fill="#dc2626">${analysisTypeLabel}分析报告</text><text x="200" y="100" text-anchor="middle" font-size="16" fill="#333">姓名：${userName || '用户'}</text><text x="200" y="130" text-anchor="middle" font-size="14" fill="#666">生成时间：${new Date().toLocaleString('zh-CN')}</text><text x="200" y="180" text-anchor="middle" font-size="16" fill="#333">这是一个测试文件</text></svg>`;
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fileBuffer = Buffer.from(svgContent, 'utf8');
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contentType = 'image/svg+xml';
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fileExtension = 'svg';
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filename = `${baseFilename}.svg`;
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break;
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}
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} catch (generationError) {
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console.error(`生成${format}文件失败:`, generationError);
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return res.status(500).json({
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error: `生成${format}文件失败`,
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details: generationError.message
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});
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}
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// 记录下载历史（可选）
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try {
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const db = dbManager.getDb();
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const stmt = db.prepare(`
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INSERT INTO download_history (user_id, analysis_type, format, filename, created_at)
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VALUES (?, ?, ?, ?, datetime('now'))
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`);
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stmt.run(userId, analysisType, format, filename);
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} catch (dbError) {
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// 下载历史记录失败不影响文件下载
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console.warn('记录下载历史失败:', dbError);
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}
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// 设置响应头
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res.setHeader('Content-Type', contentType);
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res.setHeader('Content-Disposition', `attachment; filename="${encodeURIComponent(filename)}"`);
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res.setHeader('Content-Length', fileBuffer.length);
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res.setHeader('Cache-Control', 'no-cache');
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// 发送文件
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res.send(fileBuffer);
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} catch (error) {
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console.error('下载API错误:', error);
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res.status(500).json({
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error: '服务器内部错误',
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details: error.message
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});
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}
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});
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/**
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* 获取用户下载历史
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* GET /api/download/history
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*/
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router.get('/history', authenticate, async (req, res) => {
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try {
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const userId = req.user.id;
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const { page = 1, limit = 20 } = req.query;
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const db = dbManager.getDb();
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// 获取总数
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const countStmt = db.prepare('SELECT COUNT(*) as total FROM download_history WHERE user_id = ?');
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const { total } = countStmt.get(userId);
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// 获取分页数据
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const offset = (page - 1) * limit;
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const stmt = db.prepare(`
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SELECT analysis_type, format, filename, created_at
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FROM download_history
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WHERE user_id = ?
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ORDER BY created_at DESC
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LIMIT ? OFFSET ?
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`);
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const downloads = stmt.all(userId, limit, offset);
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res.json({
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downloads,
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pagination: {
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page: parseInt(page),
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limit: parseInt(limit),
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total,
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pages: Math.ceil(total / limit)
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}
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});
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} catch (error) {
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console.error('获取下载历史失败:', error);
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res.status(500).json({
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error: '获取下载历史失败',
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details: error.message
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});
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}
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});
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/**
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* 获取支持的格式和分析类型
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* GET /api/download/formats
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*/
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router.get('/formats', (req, res) => {
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res.json({
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supportedFormats: [
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{
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format: 'markdown',
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label: 'Markdown文档',
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description: '结构化文本格式，便于编辑',
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mimeType: 'text/markdown',
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extension: 'md'
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},
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{
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format: 'pdf',
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label: 'PDF文档',
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description: '专业格式，便于打印和分享',
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mimeType: 'application/pdf',
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extension: 'pdf'
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},
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{
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format: 'png',
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label: 'PNG图片',
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description: '高清图片格式，便于保存',
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mimeType: 'image/png',
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extension: 'png'
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}
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],
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supportedAnalysisTypes: [
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{
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type: 'bazi',
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label: '八字命理',
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description: '基于传统八字学说的命理分析'
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},
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{
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type: 'ziwei',
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label: '紫微斗数',
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description: '通过星曜排布分析命运走向'
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},
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{
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type: 'yijing',
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label: '易经占卜',
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description: '运用梅花易数解读卦象含义'
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}
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]
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});
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});
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module.exports = router;
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