ahttp

# -*- coding: utf-8 -*-
# @Time    : 2018/8/20 14:35
# @Author  : cxa
# @File    : chttp.py
# @Software: PyCharm
# !/usr/bin/env python3
# -*- coding: utf-8 -*-

from functools import partial, wraps
from random import random
import asyncio, os
from cchardet import detect

try:
    import aiohttp
except ImportError:
    raise RuntimeError('您没有安装aiohttp，请执行安装命令 pip install aiohttp  ')



result, all_tasks, connector, sessiondict = [], [], [], {}


class AhttpRequest():
    def __init__(self, method, url, timeout=None, session=False, headers=None, cookies=None, unsafe=None,
                 mark='1111111111', **kwargs):
        self.method, self.session, self.url, self.mark, self.timeout = method, session, url, mark, timeout
        callback = kwargs.pop('callback', None)
        self.callback = callback
        self.kwargs = kwargs
        if not session:
            self.sessiondict = (cookies, headers, aiohttp.CookieJar(unsafe=True) if unsafe else None)

    def run(self, pool=5, exception_handle=None):
        result = run([self], pool=pool, exception_handle=exception_handle)
        return result[0]


class WithSession():
    def __init__(self, mark, session=True):
        self.get = partial(AhttpRequest, 'GET', session=session, mark=mark)
        self.options = partial(AhttpRequest, 'OPTIONS', session=session, mark=mark)
        self.head = partial(AhttpRequest, 'HEAD', session=session, mark=mark)
        self.post = partial(AhttpRequest, 'POST', session=session, mark=mark)
        self.put = partial(AhttpRequest, 'PUT', session=session, mark=mark)
        self.patch = partial(AhttpRequest, 'PATCH', session=session, mark=mark)
        self.delete = partial(AhttpRequest, 'DELETE', session=session, mark=mark)


get = partial(AhttpRequest, 'GET')
options = partial(AhttpRequest, 'OPTIONS')
head = partial(AhttpRequest, 'HEAD')
post = partial(AhttpRequest, 'POST')
put = partial(AhttpRequest, 'PUT')
patch = partial(AhttpRequest, 'PATCH')
delete = partial(AhttpRequest, 'DELETE')


class ClientSession(aiohttp.ClientSession):
    def close(self):
        """
        对ClientSession类的close方法进行重写
        """
        if not self.closed:
            if self._connector_owner:
                self._connector.close()
            connector.append(self._connector)

        return 'ClientSession.close() is a coroutine'


def Session(cookies=None, headers=None, unsafe=None):
    mark = str(round(random() * 10 ** 10))
    sessiondict[mark] = (cookies, headers, aiohttp.CookieJar(unsafe=True) if unsafe else None)
    return WithSession(mark=mark)


def run(tasks, pool=2, exception_handle=None):
    del result[:]
    del connector[:]
    loop = asyncio.get_event_loop()
    future = asyncio.ensure_future(go(tasks, pool, exception_handle, loop=loop))
    loop.run_until_complete(future)
    # loop.close()
    return result


class AhttpResponse():
    def __init__(self, content, clientResponse):
        self.content = content
        self.clientResponse = clientResponse

    def raw(self):
        return self.clientResponse

    @property
    def url(self):
        return self.clientResponse.url

    @property
    def cookies(self):
        return self.clientResponse.cookies

    @property
    def headers(self):
        return self.clientResponse.headers

    @property
    def status(self):
        return self.clientResponse.status

    @property
    def method(self):
        return self.clientResponse.method

    def text(self, encoding=None):
        encoding = encoding or detect(self.content)['encoding']
        return self.content.decode(encoding=encoding)

    def __repr__(self):
        return "<AhttpResponse [status {}]>".format(self.clientResponse.status)

    __str__ = __repr__


async def go(tasks, pool, exception_handle, loop):
    del all_tasks[:]
    conn = aiohttp.TCPConnector(use_dns_cache=True, loop=loop, verify_ssl=False)
    sem = asyncio.Semaphore(pool)
    classify = {}
    [classify[i.mark].append(i) if classify.get(i.mark, 0) else classify.setdefault(i.mark, [i]) for i in tasks]
    print(classify)
    try:
        for i in classify.pop('1111111111'):
            all_tasks.append(control_sem(sem, i, exception_handle, session=False))
    except:
        pass
    for i in classify:
        async with ClientSession(cookies=sessiondict[i][0], headers=sessiondict[i][1], cookie_jar=sessiondict[i][2],
                                 connector_owner=False, connector=conn) as locals()['session{}'.format(i)]:
            for j in classify[i]:
                all_tasks.append(control_sem(sem, j, exception_handle, session=locals()['session{}'.format(i)]))

    await asyncio.wait(all_tasks)
    # 关闭所有连接
    for i in connector:
        i.close()
    return True


async def fetch(session, i, exception_handle):
    try:
        if session:
            async with session.request(i.method, i.url, timeout=i.timeout, **(i.kwargs)) as resp:
                content = await resp.read()
                myAhttp = AhttpResponse(content, resp)
        else:
            async with aiohttp.ClientSession(cookies=i.sessiondict[0], headers=i.sessiondict[1],
                                             cookie_jar=i.sessiondict[2]) as session2:
                async with session2.request(i.method, i.url, timeout=i.timeout, **(i.kwargs)) as resp:
                    content = await resp.read()
                    myAhttp = AhttpResponse(content, resp)

        if i.callback:
            try:
                i.callback(myAhttp)
            except:
                pass
    except Exception as e:
        myAhttp = None
        exception_handle and exception_handle(i, e)

    finally:
        result.append(myAhttp)


async def control_sem(sem, i, exception_handle, session):
    # 限制信号量
    async with sem:
        await fetch(session, i, exception_handle)

# __all__ = (
#     'Session', 'get', 'options', 'head', 'post', 'put', 'patch', 'delete'
# )

if __name__ == '__main__':
    urls = ["http://www.runoob.com/python/att-time-mktime.html",
            "https://blog.csdn.net/getcomputerstyle/article/details/71515331"]