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backend/config/env.js

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+// 环境配置
+const path = require('path')
+require('dotenv').config({ path: path.join(__dirname, '../../.env') })
+
+const config = {
+  // 开发环境
+  development: {
+    port: process.env.PORT || 3000,
+    mongodb: {
+      uri: process.env.MONGODB_URI || 'mongodb://localhost:27017/jiebanke_dev',
+      options: {
+        useNewUrlParser: true,
+        useUnifiedTopology: true
+      }
+    },
+    jwt: {
+      secret: process.env.JWT_SECRET || 'dev-jwt-secret-key-2024',
+      expiresIn: process.env.JWT_EXPIRES_IN || '7d',
+      refreshExpiresIn: process.env.JWT_REFRESH_EXPIRES_IN || '30d'
+    },
+    redis: {
+      host: process.env.REDIS_HOST || 'localhost',
+      port: process.env.REDIS_PORT || 6379,
+      password: process.env.REDIS_PASSWORD || ''
+    },
+    upload: {
+      maxFileSize: 5 * 1024 * 1024, // 5MB
+      allowedTypes: ['image/jpeg', 'image/png', 'image/gif']
+    },
+    cors: {
+      origin: process.env.CORS_ORIGIN || 'http://localhost:9000',
+      credentials: true
+    }
+  },
+
+  // 测试环境
+  test: {
+    port: process.env.PORT || 3001,
+    mongodb: {
+      uri: process.env.MONGODB_URI || 'mongodb://localhost:27017/jiebanke_test',
+      options: {
+        useNewUrlParser: true,
+        useUnifiedTopology: true
+      }
+    },
+    jwt: {
+      secret: process.env.JWT_SECRET || 'test-jwt-secret-key-2024',
+      expiresIn: '1h',
+      refreshExpiresIn: '7d'
+    },
+    upload: {
+      maxFileSize: 2 * 1024 * 1024, // 2MB
+      allowedTypes: ['image/jpeg', 'image/png']
+    }
+  },
+
+  // 生产环境
+  production: {
+    port: process.env.PORT || 3000,
+    mongodb: {
+      uri: process.env.MONGODB_URI,
+      options: {
+        useNewUrlParser: true,
+        useUnifiedTopology: true
+      }
+    },
+    jwt: {
+      secret: process.env.JWT_SECRET,
+      expiresIn: process.env.JWT_EXPIRES_IN || '1d',
+      refreshExpiresIn: process.env.JWT_REFRESH_EXPIRES_IN || '7d'
+    },
+    redis: {
+      host: process.env.REDIS_HOST,
+      port: process.env.REDIS_PORT || 6379,
+      password: process.env.REDIS_PASSWORD
+    },
+    upload: {
+      maxFileSize: 10 * 1024 * 1024, // 10MB
+      allowedTypes: ['image/jpeg', 'image/png', 'image/webp']
+    },
+    cors: {
+      origin: process.env.CORS_ORIGIN || 'https://your-domain.com',
+      credentials: true
+    }
+  }
+}
+
+// 获取当前环境配置
+const getConfig = () => {
+  const env = process.env.NODE_ENV || 'development'
+  return config[env]
+}
+
+module.exports = getConfig()