添加汇率数据

pages/api/exchange-rate.js

@@ -0,0 +1,105 @@
+import { createPool } from 'mariadb';
+import fs from 'fs';
+import path from 'path';
+
+function loadDatabaseConfig() {
+  const envPath = path.join(process.cwd(), '.env');
+  if (fs.existsSync(envPath)) {
+    const envContent = fs.readFileSync(envPath, 'utf-8');
+    const lines = envContent.split('\n');
+    
+    for (const line of lines) {
+      const trimmedLine = line.trim();
+      if (trimmedLine.startsWith('DATABASE_URL=')) {
+        const url = trimmedLine.substring('DATABASE_URL='.length).replace(/^"|"$/g, '');
+        
+        // 解析URL
+        const parts = url.split('://')[1].split('@');
+        const auth = parts[0].split(':');
+        const hostAndDb = parts[1].split('/');
+        const hostAndPort = hostAndDb[0].split(':');
+        
+        return {
+          user: auth[0],
+          password: auth[1],
+          host: hostAndPort[0],
+          port: parseInt(hostAndPort[1]),
+          database: hostAndDb[1]
+        };
+      }
+    }
+  }
+  
+  return {
+    host: '192.168.111.111',
+    port: 3306,
+    user: 'root',
+    password: 'fullstack',
+    database: 'iboard'
+  };
+}
+
+let pool;
+
+async function initPool() {
+  if (!pool) {
+    const config = loadDatabaseConfig();
+    pool = createPool({
+      host: config.host,
+      port: config.port,
+      user: config.user,
+      password: config.password,
+      database: config.database,
+      connectionLimit: 5
+    });
+  }
+  return pool;
+}
+
+export default async function handler(req, res) {
+  try {
+    await initPool();
+    
+    // 获取查询参数
+    const { startDate, endDate, limit = 30 } = req.query;
+    
+    let query = 'SELECT date, centerPrice FROM econ_ExchangeRate WHERE currency = ? ORDER BY date DESC';
+    const params = ['USD/CNY'];
+    
+    if (startDate && endDate) {
+      query = 'SELECT date, centerPrice FROM econ_ExchangeRate WHERE currency = ? AND date BETWEEN ? AND ? ORDER BY date DESC';
+      params.push(startDate, endDate);
+    }
+    
+    const result = await pool.query(query, params);
+    
+    // 限制返回数量
+    const limitedResult = result.slice(0, parseInt(limit));
+    
+    // 反转顺序，使日期从早到晚
+    const sortedResult = limitedResult.reverse();
+    
+    // 格式化数据
+    const formattedData = sortedResult.map(row => ({
+      date: row.date instanceof Date ? row.date.toISOString().split('T')[0] : row.date,
+      rate: parseFloat(row.centerPrice)
+    }));
+    
+    res.status(200).json({
+      success: true,
+      data: formattedData,
+      total: result.length
+    });
+  } catch (error) {
+    console.error('获取汇率数据失败:', error.message);
+    res.status(500).json({
+      success: false,
+      message: '获取汇率数据失败',
+      error: error.message
+    });
+  } finally {
+    if (pool) {
+      await pool.end();
+    }
+  }
+}