# aiohttp 客户端代理连接错误：无法连接到代理

- **ID:** `python/aiohttp-client-connector-proxy-error`
- **领域:** python
- **类别:** network_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

HTTP/HTTPS 代理服务器不可达或拒绝连接。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.10 | active | — | — |
| 3.11 | active | — | — |

## 解决方案

1. **Verify proxy settings and use proxy authentication if needed** (85% 成功率)
   ```
   proxy_auth = aiohttp.BasicAuth('user', 'pass')
async with aiohttp.ClientSession() as session:
    async with session.get(url, proxy='http://proxy.example.com:8080', proxy_auth=proxy_auth) as resp:
   ```
2. **Use environment variables for proxy configuration** (80% 成功率)
   ```
   import os
os.environ['HTTP_PROXY'] = 'http://proxy.example.com:8080'
os.environ['HTTPS_PROXY'] = 'http://proxy.example.com:8080'
   ```

## 无效尝试

- **Disabling proxy usage entirely** — This may bypass corporate network policies or cause direct access failures. (40% 失败率)
- **Using a different proxy without authentication** — The new proxy may also be unreachable or require authentication. (50% 失败率)