DrissionPage/DrissionPage/chromium_base.py

# -*- coding:utf-8 -*-
"""
@Author  :   g1879
@Contact :   g1879@qq.com
"""
from json import loads, JSONDecodeError
from pathlib import Path
from time import perf_counter, sleep
from warnings import warn

from requests import Session

from .base import BasePage
from .chromium_driver import ChromiumDriver
from .chromium_element import ChromiumWaiter, ChromiumScroll, ChromiumElement, run_js, make_chromium_ele, \
    ChromiumElementWaiter
from .functions.errors import ContextLossError, ElementLossError, AlertExistsError
from .functions.locator import get_loc
from .functions.tools import get_usable_path
from .functions.web import offset_scroll, cookies_to_tuple
from .session_element import make_session_ele


class ChromiumBase(BasePage):
    """标签页、frame、页面基类"""

    def __init__(self, address, tab_id=None, timeout=None):
        """
        :param address: 浏览器 ip:port
        :param tab_id: 要控制的标签页id，不指定默认为激活的
        :param timeout: 超时时间
        """
        self._is_loading = None
        self._root_id = None
        self._debug = False
        self._debug_recorder = None
        self._tab_obj = None

        self._set_start_options(address, None)
        self._set_runtime_settings()
        self._connect_browser(tab_id)
        timeout = timeout if timeout is not None else self.timeouts.implicit
        super().__init__(timeout)

    def _set_start_options(self, address, none):
        """设置浏览器启动属性
        :param address: 'ip:port'
        :param none: 用于后代继承
        :return: None
        """
        self.address = address

    def _set_runtime_settings(self):
        self._timeouts = Timeout(self)
        self._page_load_strategy = 'normal'

    def _connect_browser(self, tab_id=None):
        """连接浏览器，在第一次时运行
        :param tab_id: 要控制的标签页id，不指定默认为激活的
        :return: None
        """
        self._chromium_init()
        if not tab_id:
            json = self._control_session.get(f'http://{self.address}/json').json()
            tab_id = [i['id'] for i in json if i['type'] == 'page'][0]
        self._driver_init(tab_id)
        self._get_document()
        self._first_run = False

    def _chromium_init(self):
        """浏览器初始设置"""
        self._control_session = Session()
        self._control_session.keep_alive = False
        self._first_run = True
        self._is_reading = False
        self._upload_list = None
        self._wait = None

    def _driver_init(self, tab_id):
        """新建页面、页面刷新、切换标签页后要进行的cdp参数初始化
        :param tab_id: 要跳转到的标签页id
        :return: None
        """
        self._is_loading = True
        self._tab_obj = ChromiumDriver(tab_id=tab_id, tab_type='page', address=self.address)

        self._tab_obj.start()
        self._tab_obj.DOM.enable()
        self._tab_obj.Page.enable()

        self._tab_obj.Page.frameStoppedLoading = self._onFrameStoppedLoading
        self._tab_obj.Page.frameStartedLoading = self._onFrameStartedLoading
        self._tab_obj.DOM.documentUpdated = self._onDocumentUpdated
        self._tab_obj.Page.loadEventFired = self._onLoadEventFired
        self._tab_obj.Page.frameNavigated = self._onFrameNavigated

    def _get_document(self):
        """刷新cdp使用的document数据"""
        if not self._is_reading:
            self._is_reading = True

            if self._debug:
                print('获取document')
                if self._debug_recorder:
                    self._debug_recorder.add_data((perf_counter(), '获取document', '开始'))

            try:  # 处理标签页关闭的情况
                self._wait_loaded()
            except ConnectionError:
                return

            while True:
                try:
                    root_id = self.run_cdp('DOM.getDocument')['root']['nodeId']
                    if self._debug_recorder:
                        self._debug_recorder.add_data((perf_counter(), '信息', f'root_id：{root_id}'))
                    self._root_id = self.run_cdp('DOM.resolveNode', nodeId=root_id)['object']['objectId']
                    break

                except Exception:
                    if self._debug_recorder:
                        self._debug_recorder.add_data((perf_counter(), 'err', '读取root_id出错'))

            if self._debug:
                print('获取document结束')
                if self._debug_recorder:
                    self._debug_recorder.add_data((perf_counter(), '获取document', '结束'))

            self._is_loading = False
            self._is_reading = False

    def _wait_loaded(self, timeout=None):
        """等待页面加载完成
        :param timeout: 超时时间
        :return: 是否成功，超时返回False
        """
        timeout = timeout if timeout is not None else self.timeouts.page_load

        end_time = perf_counter() + timeout
        while perf_counter() < end_time:
            state = self.ready_state
            if state is None:  # 存在alert的情况
                return None

            if self._debug_recorder:
                self._debug_recorder.add_data((perf_counter(), 'waiting', state))

            if state == 'complete':
                return True
            elif self.page_load_strategy == 'eager' and state in ('interactive', 'complete'):
                self.stop_loading()
                return True
            elif self.page_load_strategy == 'none':
                self.stop_loading()
                return True
            sleep(.1)

        self.stop_loading()
        return False

    def _onFrameStartedLoading(self, **kwargs):
        """页面开始加载时触发"""
        if kwargs['frameId'] == self.tab_id:
            self._is_loading = True

            if self._debug:
                print('页面开始加载 FrameStartedLoading')
                if self._debug_recorder:
                    self._debug_recorder.add_data((perf_counter(), '加载流程', 'FrameStartedLoading'))

    def _onFrameStoppedLoading(self, **kwargs):
        """页面加载完成后触发"""
        if kwargs['frameId'] == self.tab_id and self._first_run is False and self._is_loading:
            if self._debug:
                print('页面停止加载 FrameStoppedLoading')
                if self._debug_recorder:
                    self._debug_recorder.add_data((perf_counter(), '加载流程', 'FrameStoppedLoading'))

            self._get_document()

    def _onLoadEventFired(self, **kwargs):
        """在页面刷新、变化后重新读取页面内容"""
        if self._debug:
            print('loadEventFired')
            if self._debug_recorder:
                self._debug_recorder.add_data((perf_counter(), '加载流程', 'loadEventFired'))

        self._get_document()

    def _onDocumentUpdated(self, **kwargs):
        """页面跳转时触发"""
        if self._debug:
            print('documentUpdated')
            if self._debug_recorder:
                self._debug_recorder.add_data((perf_counter(), '加载流程', 'documentUpdated'))

    def _onFrameNavigated(self, **kwargs):
        """页面跳转时触发"""
        if kwargs['frame'].get('parentId', None) == self.tab_id and self._first_run is False and self._is_loading:
            self._is_loading = True
            if self._debug:
                print('navigated')
                if self._debug_recorder:
                    self._debug_recorder.add_data((perf_counter(), '加载流程', 'navigated'))

    def _onFileChooserOpened(self, **kwargs):
        """文件选择框打开时触发"""
        if self._upload_list:
            files = self._upload_list if kwargs['mode'] == 'selectMultiple' else self._upload_list[:1]
            self.run_cdp('DOM.setFileInputFiles', files=files, backendNodeId=kwargs['backendNodeId'])
            self._upload_list = []

    def set_upload_files(self, files):
        """等待上传的文件路径
        :param files: 文件路径列表或字符串，字符串时多个文件用回车分隔
        :return: None
        """
        if self._upload_list is None:
            self._tab_obj.Page.fileChooserOpened = self._onFileChooserOpened
            self.run_cdp('Page.setInterceptFileChooserDialog', enabled=True)

        if isinstance(files, str):
            files = files.split('\n')
        self._upload_list = [str(Path(i).absolute()) for i in files]

    def __call__(self, loc_or_str, timeout=None):
        """在内部查找元素
        例：ele = page('@id=ele_id')
        :param loc_or_str: 元素的定位信息，可以是loc元组，或查询字符串
        :param timeout: 超时时间
        :return: ChromiumElement对象
        """
        return self.ele(loc_or_str, timeout)

    @property
    def driver(self):
        """返回用于控制浏览器的ChromiumDriver对象"""
        if self._tab_obj is None:
            raise RuntimeError('浏览器已关闭或链接已断开。')
        return self._tab_obj

    @property
    def _wait_driver(self):
        """返回用于控制浏览器的ChromiumDriver对象，会先等待页面加载完毕"""
        while self._is_loading:
            sleep(.1)
        return self.driver

    @property
    def is_loading(self):
        """返回页面是否正在加载状态"""
        return self._is_loading

    @property
    def title(self):
        """返回当前页面title"""
        return self.run_cdp_loaded('Target.getTargetInfo', targetId=self.tab_id)['targetInfo']['title']

    @property
    def url(self):
        """返回当前页面url"""
        return self.run_cdp_loaded('Target.getTargetInfo', targetId=self.tab_id)['targetInfo']['url']

    @property
    def html(self):
        """返回当前页面html文本"""
        return self.run_cdp_loaded('DOM.getOuterHTML', objectId=self._root_id)['outerHTML']

    @property
    def json(self):
        """当返回内容是json格式时，返回对应的字典，非json格式时返回None"""
        try:
            return loads(self('t:pre', timeout=.5).text)
        except JSONDecodeError:
            raise RuntimeError('非json格式或格式不正确。')

    @property
    def tab_id(self):
        """返回当前标签页id"""
        return self.driver.id if self.driver.status == 'started' else ''

    @property
    def ready_state(self):
        """返回当前页面加载状态，'loading' 'interactive' 'complete'"""
        try:
            return self.run_cdp('Runtime.evaluate', expression='document.readyState;')['result']['value']
        except AlertExistsError:
            return None

    @property
    def size(self):
        """返回页面总宽高，格式：(宽, 高)"""
        r = self.run_cdp_loaded('Page.getLayoutMetrics')['contentSize']
        return r['width'], r['height']

    @property
    def active_ele(self):
        """返回当前焦点所在元素"""
        return self.run_js_loaded('return document.activeElement;')

    @property
    def page_load_strategy(self):
        """返回页面加载策略，有3种：'none'、'normal'、'eager'"""
        return self._page_load_strategy

    @property
    def scroll(self):
        """返回用于滚动滚动条的对象"""
        self.wait.load_complete()
        if not hasattr(self, '_scroll'):
            self._scroll = ChromiumPageScroll(self)
        return self._scroll

    @property
    def timeouts(self):
        """返回timeouts设置"""
        return self._timeouts

    @property
    def set_page_load_strategy(self):
        """返回用于设置页面加载策略的对象"""
        return PageLoadStrategy(self)

    @property
    def upload_list(self):
        """返回等待上传文件列表"""
        return self._upload_list

    @property
    def wait(self):
        """返回用于等待的对象"""
        if self._wait is None:
            self._wait = ChromiumPageWaiter(self)
        return self._wait

    def set_timeouts(self, implicit=None, page_load=None, script=None):
        """设置超时时间，单位为秒
        :param implicit: 查找元素超时时间
        :param page_load: 页面加载超时时间
        :param script: 脚本运行超时时间
        :return: None
        """
        if implicit is not None:
            self._timeouts.implicit = implicit

        if page_load is not None:
            self._timeouts.page_load = page_load

        if script is not None:
            self._timeouts.script = script

    def run_cdp(self, cmd, **cmd_args):
        """执行Chrome DevTools Protocol语句
        :param cmd: 协议项目
        :param cmd_args: 参数
        :return: 执行的结果
        """
        if self.driver.has_alert and cmd != 'Page.handleJavaScriptDialog':
            raise AlertExistsError('存在未处理的提示框。')

        r = self.driver.call_method(cmd, **cmd_args)
        if 'error' not in r:
            return r

        if 'Cannot find context with specified id' in r['error']:
            raise ContextLossError('页面被刷新，请操作前尝试等待页面刷新或加载完成。')
        elif 'Could not find node with given id' in r['error']:
            raise ElementLossError('该元素已不在当前页面中。')
        elif 'tab closed' in r['error']:
            raise RuntimeError('标签页已关闭。')
        elif 'alert exists' in r['error']:
            pass
        else:
            raise RuntimeError(r)

    def run_cdp_loaded(self, cmd, **cmd_args):
        """执行Chrome DevTools Protocol语句，执行前等待页面加载完毕
        :param cmd: 协议项目
        :param cmd_args: 参数
        :return: 执行的结果
        """
        self.wait.load_complete()
        return self.run_cdp(cmd, **cmd_args)

    def run_js(self, script, as_expr=False, *args):
        """运行javascript代码
        :param script: js文本
        :param as_expr: 是否作为表达式运行，为True时args无效
        :param args: 参数，按顺序在js文本中对应argument[0]、argument[1]...
        :return: 运行的结果
        """
        return run_js(self, script, as_expr, self.timeouts.script, args)

    def run_js_loaded(self, script, as_expr=False, *args):
        """运行javascript代码，执行前等待页面加载完毕
        :param script: js文本
        :param as_expr: 是否作为表达式运行，为True时args无效
        :param args: 参数，按顺序在js文本中对应argument[0]、argument[1]...
        :return: 运行的结果
        """
        self.wait.load_complete()
        return run_js(self, script, as_expr, self.timeouts.script, args)

    def run_async_js(self, script, as_expr=False, *args):
        """以异步方式执行js代码
        :param script: js文本
        :param as_expr: 是否作为表达式运行，为True时args无效
        :param args: 参数，按顺序在js文本中对应argument[0]、argument[1]...
        :return: None
        """
        from threading import Thread
        Thread(target=run_js, args=(self, script, as_expr, self.timeouts.script, args)).start()

    def get(self, url, show_errmsg=False, retry=None, interval=None, timeout=None):
        """访问url
        :param url: 目标url
        :param show_errmsg: 是否显示和抛出异常
        :param retry: 重试次数
        :param interval: 重试间隔（秒）
        :param timeout: 连接超时时间
        :return: 目标url是否可用
        """
        retry, interval = self._before_connect(url, retry, interval)
        self._url_available = self._d_connect(self._url,
                                              times=retry,
                                              interval=interval,
                                              show_errmsg=show_errmsg,
                                              timeout=timeout)
        return self._url_available

    def get_cookies(self, as_dict=False):
        """获取cookies信息
        :param as_dict: 为True时返回由{name: value}键值对组成的dict
        :return: cookies信息
        """
        cookies = self.run_cdp_loaded('Network.getCookies')['cookies']
        if as_dict:
            return {cookie['name']: cookie['value'] for cookie in cookies}
        else:
            return cookies

    def set_cookies(self, cookies):
        """设置cookies值
        :param cookies: cookies信息
        :return: None
        """
        cookies = cookies_to_tuple(cookies)
        result_cookies = []
        for cookie in cookies:
            if not cookie.get('domain', None):
                continue
            c = {'value': '' if cookie['value'] is None else cookie['value'],
                 'name': cookie['name'],
                 'domain': cookie['domain']}
            result_cookies.append(c)
        self.run_cdp_loaded('Network.setCookies', cookies=result_cookies)

    def set_headers(self, headers: dict) -> None:
        """设置固定发送的headers
        :param headers: dict格式的headers数据
        :return: None
        """
        self.run_cdp('Network.setExtraHTTPHeaders', headers=headers)

    def ele(self, loc_or_ele, timeout=None):
        """获取第一个符合条件的元素对象
        :param loc_or_ele: 定位符或元素对象
        :param timeout: 查找超时时间
        :return: ChromiumElement对象
        """
        return self._ele(loc_or_ele, timeout=timeout)

    def eles(self, loc_or_str, timeout=None):
        """获取所有符合条件的元素对象
        :param loc_or_str: 定位符或元素对象
        :param timeout: 查找超时时间
        :return: ChromiumElement对象组成的列表
        """
        return self._ele(loc_or_str, timeout=timeout, single=False)

    def s_ele(self, loc_or_ele=None):
        """查找第一个符合条件的元素以SessionElement形式返回，处理复杂页面时效率很高
        :param loc_or_ele: 元素的定位信息，可以是loc元组，或查询字符串
        :return: SessionElement对象或属性、文本
        """
        return make_session_ele(self, loc_or_ele)

    def s_eles(self, loc_or_str):
        """查找所有符合条件的元素以SessionElement列表形式返回
        :param loc_or_str: 元素的定位信息，可以是loc元组，或查询字符串
        :return: SessionElement对象组成的列表
        """
        return make_session_ele(self, loc_or_str, single=False)

    def _ele(self, loc_or_ele, timeout=None, single=True, relative=False):
        """执行元素查找
        :param loc_or_ele: 定位符或元素对象
        :param timeout: 查找超时时间
        :param single: 是否只返回第一个
        :return: ChromiumElement对象或元素对象组成的列表
        """
        if isinstance(loc_or_ele, (str, tuple)):
            loc = get_loc(loc_or_ele)[1]
        elif isinstance(loc_or_ele, ChromiumElement) or str(type(loc_or_ele)).endswith(".ChromiumFrame'>"):
            return loc_or_ele
        else:
            raise ValueError('loc_or_str参数只能是tuple、str、ChromiumElement类型。')

        timeout = timeout if timeout is not None else self.timeout
        search_result = self.run_cdp_loaded('DOM.performSearch', query=loc, includeUserAgentShadowDOM=True)
        count = search_result['resultCount']

        nodeIds = None
        end_time = perf_counter() + timeout
        ok = False
        while True:
            if count > 0:
                count = 1 if single else count
                try:
                    nodeIds = self._wait_driver.DOM.getSearchResults(searchId=search_result['searchId'],
                                                                     fromIndex=0, toIndex=count)
                    if nodeIds['nodeIds'][0] != 0:
                        ok = True

                except Exception:
                    sleep(.01)

            if ok or perf_counter() >= end_time:
                break

            search_result = self.run_cdp_loaded('DOM.performSearch', query=loc, includeUserAgentShadowDOM=True)
            count = search_result['resultCount']

        if not nodeIds:
            return None if single else []

        if single:
            return make_chromium_ele(self, node_id=nodeIds['nodeIds'][0])
        else:
            return [make_chromium_ele(self, node_id=i) for i in nodeIds['nodeIds']]

    def refresh(self, ignore_cache=False):
        """刷新当前页面
        :param ignore_cache: 是否忽略缓存
        :return: None
        """
        self._is_loading = True
        self.run_cdp('Page.reload', ignoreCache=ignore_cache)
        self.wait.load_start()

    def forward(self, steps=1):
        """在浏览历史中前进若干步
        :param steps: 前进步数
        :return: None
        """
        self._forward_or_back(steps)

    def back(self, steps=1):
        """在浏览历史中后退若干步
        :param steps: 后退步数
        :return: None
        """
        self._forward_or_back(-steps)

    def _forward_or_back(self, steps):
        """执行浏览器前进或后退，会跳过url相同的历史记录
        :param steps: 步数
        :return: None
        """
        if steps == 0:
            return

        history = self.run_cdp('Page.getNavigationHistory')
        index = history['currentIndex']
        history = history['entries']
        direction = 1 if steps > 0 else -1
        curr_url = history[index]['userTypedURL']
        nid = None
        for num in range(abs(steps)):
            for i in history[index::direction]:
                index += direction
                if i['userTypedURL'] != curr_url:
                    nid = i['id']
                    curr_url = i['userTypedURL']
                    break

        if nid:
            self._is_loading = True
            self.run_cdp('Page.navigateToHistoryEntry', entryId=nid)

    def stop_loading(self):
        """页面停止加载"""
        if self._debug:
            print('停止页面加载')
            if self._debug_recorder:
                self._debug_recorder.add_data((perf_counter(), '操作', '停止页面加载'))

        self.run_cdp('Page.stopLoading')
        while self.ready_state != 'complete':
            sleep(.1)

    def set_user_agent(self, ua, platform=None):
        """为当前tab设置user agent，只在当前tab有效
        :param ua: user agent字符串
        :param platform: platform字符串
        :return: None
        """
        keys = {'userAgent': ua}
        if platform:
            keys['platform'] = platform
        self.run_cdp('Emulation.setUserAgentOverride', **keys)

    def get_session_storage(self, item=None):
        """获取sessionStorage信息，不设置item则获取全部
        :param item: 要获取的项，不设置则返回全部
        :return: sessionStorage一个或所有项内容
        """
        js = f'sessionStorage.getItem("{item}");' if item else 'sessionStorage;'
        return self.run_js_loaded(js, as_expr=True)

    def get_local_storage(self, item=None):
        """获取localStorage信息，不设置item则获取全部
        :param item: 要获取的项目，不设置则返回全部
        :return: localStorage一个或所有项内容
        """
        js = f'localStorage.getItem("{item}");' if item else 'localStorage;'
        return self.run_js_loaded(js, as_expr=True)

    def set_session_storage(self, item, value):
        """设置或删除某项sessionStorage信息
        :param item: 要设置的项
        :param value: 项的值，设置为False时，删除该项
        :return: None
        """
        js = f'sessionStorage.removeItem("{item}");' if item is False \
            else f'sessionStorage.setItem("{item}","{value}");'
        return self.run_js_loaded(js, as_expr=True)

    def set_local_storage(self, item, value):
        """设置或删除某项localStorage信息
        :param item: 要设置的项
        :param value: 项的值，设置为False时，删除该项
        :return: None
        """
        js = f'localStorage.removeItem("{item}");' if item is False else f'localStorage.setItem("{item}","{value}");'
        return self.run_js_loaded(js, as_expr=True)

    def get_screenshot(self, path=None, as_bytes=None, full_page=False, left_top=None, right_bottom=None):
        """对页面进行截图，可对整个网页、可见网页、指定范围截图。对可视范围外截图需要90以上版本浏览器支持
        :param path: 完整路径，后缀可选 'jpg','jpeg','png','webp'
        :param as_bytes: 是否已字节形式返回图片，可选 'jpg','jpeg','png','webp'，生效时path参数无效
        :param full_page: 是否整页截图，为True截取整个网页，为False截取可视窗口
        :param left_top: 截取范围左上角坐标
        :param right_bottom: 截取范围右下角角坐标
        :return: 图片完整路径或字节文本
        """
        if as_bytes:
            if as_bytes is True:
                pic_type = 'png'
            else:
                if as_bytes not in ('jpg', 'jpeg', 'png', 'webp'):
                    raise ValueError("只能接收'jpg', 'jpeg', 'png', 'webp'四种格式。")
                pic_type = 'jpeg' if as_bytes == 'jpg' else as_bytes

        else:
            if not path:
                path = f'{self.title}.jpg'
            path = get_usable_path(path)
            pic_type = path.suffix.lower()
            if pic_type not in ('.jpg', '.jpeg', '.png', '.webp'):
                raise TypeError(f'不支持的文件格式：{pic_type}。')
            pic_type = 'jpeg' if pic_type == '.jpg' else pic_type[1:]

        width, height = self.size
        if full_page:
            vp = {'x': 0, 'y': 0, 'width': width, 'height': height, 'scale': 1}
            png = self.run_cdp_loaded('Page.captureScreenshot', format=pic_type,
                                      captureBeyondViewport=True, clip=vp)['data']
        else:
            if left_top and right_bottom:
                x, y = left_top
                w = right_bottom[0] - x
                h = right_bottom[1] - y
                vp = {'x': x, 'y': y, 'width': w, 'height': h, 'scale': 1}
                png = self.run_cdp_loaded('Page.captureScreenshot', format=pic_type,
                                          captureBeyondViewport=True, clip=vp)['data']
            else:
                png = self.run_cdp_loaded('Page.captureScreenshot', format=pic_type)['data']

        from base64 import b64decode
        png = b64decode(png)

        if as_bytes:
            return png

        path.parent.mkdir(parents=True, exist_ok=True)
        with open(path, 'wb') as f:
            f.write(png)
        return str(path.absolute())

    def clear_cache(self, session_storage=True, local_storage=True, cache=True, cookies=True):
        """清除缓存，可选要清除的项
        :param session_storage: 是否清除sessionStorage
        :param local_storage: 是否清除localStorage
        :param cache: 是否清除cache
        :param cookies: 是否清除cookies
        :return: None
        """
        if session_storage:
            self.run_js('sessionStorage.clear();', as_expr=True)
        if local_storage:
            self.run_js('localStorage.clear();', as_expr=True)
        if cache:
            self.run_cdp_loaded('Network.clearBrowserCache')
        if cookies:
            self.run_cdp_loaded('Network.clearBrowserCookies')

    def _d_connect(self, to_url, times=0, interval=1, show_errmsg=False, timeout=None):
        """尝试连接，重试若干次
        :param to_url: 要访问的url
        :param times: 重试次数
        :param interval: 重试间隔（秒）
        :param show_errmsg: 是否抛出异常
        :param timeout: 连接超时时间
        :return: 是否成功，返回None表示不确定
        """
        err = None
        timeout = timeout if timeout is not None else self.timeouts.page_load

        for t in range(times + 1):
            err = None
            result = self.run_cdp('Page.navigate', url=to_url)

            is_timeout = self._wait_loaded(timeout)
            if is_timeout is None:
                return None
            is_timeout = not is_timeout
            self.wait.load_complete()

            if is_timeout:
                err = TimeoutError('页面连接超时。')
            if 'errorText' in result:
                err = ConnectionError(result['errorText'])

            if not err:
                break

            if t < times:
                sleep(interval)
                while self.ready_state != 'complete':
                    sleep(.1)
                if self._debug:
                    print('重试')
                if show_errmsg:
                    print(f'重试 {to_url}')

        if err:
            if show_errmsg:
                raise err if err is not None else ConnectionError('连接异常。')
            return False

        return True

    def wait_loading(self, timeout=None):
        """阻塞程序，等待页面进入加载状态
        :param timeout: 超时时间
        :return: 等待结束时是否进入加载状态
        """
        warn("此方法即将弃用，请用wait.load_start()方法代替。", DeprecationWarning)
        return self.wait.load_start(timeout)

    def wait_ele(self, loc_or_ele, timeout=None):
        """返回用于等待元素到达某个状态的等待器对象
        :param loc_or_ele: 可以是元素、查询字符串、loc元组
        :param timeout: 等待超时时间
        :return: 用于等待的ElementWaiter对象
        """
        warn("此方法即将弃用，请用wait.ele_xxxx()方法代替。", DeprecationWarning)
        return ChromiumElementWaiter(self, loc_or_ele, timeout)

    def scroll_to_see(self, loc_or_ele):
        """滚动页面直到元素可见
        :param loc_or_ele: 元素的定位信息，可以是loc元组，或查询字符串（详见ele函数注释）
        :return: None
        """
        warn("此方法即将弃用，请用scroll.to_see()方法代替。", DeprecationWarning)
        self.scroll.to_see(loc_or_ele)


class ChromiumPageWaiter(ChromiumWaiter):
    def __init__(self, page):
        """
        :param page: 所属页面对象
        """
        super().__init__(page)

    def _loading(self, timeout=None, start=True):
        """等待页面开始加载或加载完成
        :param timeout: 超时时间，为None时使用页面timeout属性
        :param start: 等待开始还是结束
        :return: 是否等待成功
        """
        if timeout != 0:
            timeout = self._driver.timeout if timeout in (None, True) else timeout
            end_time = perf_counter() + timeout
            while perf_counter() < end_time:
                if self._driver.is_loading == start:
                    return True
                sleep(.005)
            return False

    def load_start(self, timeout=None):
        """等待页面开始加载
        :param timeout: 超时时间，为None时使用页面timeout属性
        :return: 是否等待成功
        """
        return self._loading(timeout=timeout)

    def load_complete(self, timeout=None):
        """等待页面开始加载
        :param timeout: 超时时间，为None时使用页面timeout属性
        :return: 是否等待成功
        """
        return self._loading(timeout=timeout, start=False)


class ChromiumPageScroll(ChromiumScroll):
    def __init__(self, page):
        """
        :param page: 页面对象
        """
        super().__init__(page)
        self.t1 = 'window'
        self.t2 = 'document.documentElement'

    def to_see(self, loc_or_ele):
        """滚动页面直到元素可见
        :param loc_or_ele: 元素的定位信息，可以是loc元组，或查询字符串
        :return: None
        """
        ele = self._driver.ele(loc_or_ele)
        node_id = ele.node_id
        try:
            self._driver.run_cdp_loaded('DOM.scrollIntoViewIfNeeded', nodeId=node_id)
        except Exception:
            ele.run_js_loaded("this.scrollIntoView();")

        if not ele.is_in_viewport:
            offset_scroll(ele, 0, 0)


class Timeout(object):
    """用于保存d模式timeout信息的类"""

    def __init__(self, page, implicit=None, page_load=None, script=None):
        """
        :param page: ChromiumBase页面
        :param implicit: 默认超时时间
        :param page_load: 页面加载超时时间
        :param script: js超时时间
        """
        self._page = page
        self.implicit = 10 if implicit is None else implicit
        self.page_load = 30 if page_load is None else page_load
        self.script = 30 if script is None else script

    def __repr__(self):
        return str({'implicit': self.implicit, 'page_load': self.page_load, 'script': self.script})


class PageLoadStrategy(object):
    """用于设置页面加载策略的类"""

    def __init__(self, page):
        """
        :param page: ChromiumBase对象
        """
        self._page = page

    def __call__(self, value):
        """设置加载策略
        :param value: 可选 'normal', 'eager', 'none'
        :return: None
        """
        if value.lower() not in ('normal', 'eager', 'none'):
            raise ValueError("只能选择 'normal', 'eager', 'none'。")
        self._page._page_load_strategy = value

    def normal(self):
        """设置页面加载策略为normal"""
        self._page._page_load_strategy = 'normal'

    def eager(self):
        """设置页面加载策略为eager"""
        self._page._page_load_strategy = 'eager'

    def none(self):
        """设置页面加载策略为none"""
        self._page._page_load_strategy = 'none'