import aiohttp
import asyncio
import time
from aiohttp import ClientProxyConnectionError, ServerDisconnectedError, ClientOSError, ClientHttpProxyError
from asyncio import TimeoutError
from mydb import RedisClient


BATCH_TEST_SIZE = 100
TEST_URL = 'http://httpbin.org/get'
VALUE_STATUS_CODES = [200]

EXCEPTIONS = (
    ClientProxyConnectionError,
    ConnectionRefusedError,
    TimeoutError,
    ServerDisconnectedError,
    ClientOSError,
    ClientHttpProxyError
)


class Tester(object):
    """docstring for Tester"""
    def __init__(self):
        self.redis = RedisClient()

    async def test_single_proxy(self, proxy):
        """
        测试单个代理
        param proxy: 单个代理
        return: None
        """
        conn = aiohttp.TCPConnector(verify_ssl=False)
        async with aiohttp.ClientSession(connector=conn) as session:
            try:
                if isinstance(proxy, bytes):
                    proxy = proxy.decode('utf-8')
                real_proxy = 'http://' + proxy
                print("正在测试", proxy)
                async with session.get(TEST_URL, proxy=real_proxy, timeout=15) as response:
                    if response.status in VALUE_STATUS_CODES:
                        self.redis.max(proxy)
                        print("代理可以", proxy)
                    else:
                        self.redis.decrease(proxy)
                        print("请求响应码不合法", proxy)
            except EXCEPTIONS:
                self.redis.decrease(proxy)
                print("代理请求失败", proxy)

    def run(self):
        """
        测试主函数
        return: None
        """
        print("测试器开始运行")
        try:
            proxies = self.redis.all()
            loop = asyncio.get_event_loop()
            # 批量测试
            for i in range(0, len(proxies), BATCH_TEST_SIZE):
                test_proxies = proxies[i:i + BATCH_TEST_SIZE]
                tasks = [self.test_single_proxy(proxy) for proxy in test_proxies]
                loop.run_until_complete(asyncio.wait(tasks))
                time.sleep(5)
        except Exception as e:
            print("测试器发生错误", e.args)


if __name__ == '__main__':
    tester = Tester()
    tester.run()
