mirror of
https://gitee.com/g1879/DrissionPage.git
synced 2024-12-10 04:00:23 +08:00
436 lines
14 KiB
Python
436 lines
14 KiB
Python
# -*- coding:utf-8 -*-
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"""
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@Author : g1879
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@Contact : g1879@qq.com
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@File : common.py
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"""
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from html import unescape
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from pathlib import Path
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from re import split, search, sub
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from shutil import rmtree
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from typing import Union
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from zipfile import ZipFile
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def get_ele_txt(e) -> str:
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"""获取元素内所有文本
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:param e: 元素对象
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:return: 元素内所有文本
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"""
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# 前面无须换行的元素
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nowrap_list = ('br', 'sub', 'sup', 'em', 'strong', 'a', 'font', 'b', 'span', 's', 'i', 'del', 'ins', 'img', 'td',
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'th', 'abbr', 'bdi', 'bdo', 'cite', 'code', 'data', 'dfn', 'kbd', 'mark', 'q', 'rp', 'rt', 'ruby',
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'samp', 'small', 'time', 'u', 'var', 'wbr', 'button', 'slot', 'content')
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# 后面添加换行的元素
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wrap_after_list = ('p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'ol', 'li', 'blockquote', 'header',
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'footer', 'address' 'article', 'aside', 'main', 'nav', 'section', 'figcaption', 'summary')
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# 不获取文本的元素
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noText_list = ('script', 'style', 'video', 'audio', 'iframe', 'embed', 'noscript', 'canvas', 'template')
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# 用/t分隔的元素
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tab_list = ('td', 'th')
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if e.tag in noText_list:
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return e.raw_text
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def get_node_txt(ele, pre: bool = False):
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tag = ele.tag
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if tag == 'br':
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return [True]
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if not pre and tag == 'pre':
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pre = True
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str_list = []
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if tag in noText_list and not pre: # 标签内的文本不返回
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return str_list
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nodes = ele.eles('xpath:./text() | *')
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prev_ele = ''
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for el in nodes:
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if isinstance(el, str): # 字符节点
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if pre:
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str_list.append(el)
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else:
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if sub('[ \n\t\r]', '', el) != '': # 字符除了回车和空格还有其它内容
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txt = el
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if not pre:
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txt = txt.replace('\n', ' ').strip(' ')
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txt = sub(r' {2,}', ' ', txt)
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str_list.append(txt)
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else: # 元素节点
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if el.tag not in nowrap_list and str_list and str_list[-1] != '\n': # 元素间换行的情况
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str_list.append('\n')
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if el.tag in tab_list and prev_ele in tab_list: # 表格的行
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str_list.append('\t')
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str_list.extend(get_node_txt(el, pre))
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prev_ele = el.tag
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if tag in wrap_after_list and str_list and str_list[-1] not in ('\n', True): # 有些元素后面要添加回车
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str_list.append('\n')
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return str_list
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re_str = get_node_txt(e)
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if re_str and re_str[-1] == '\n':
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re_str.pop()
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re_str = ''.join([i if i is not True else '\n' for i in re_str])
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return format_html(re_str)
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def get_loc(loc: Union[tuple, str], translate_css: bool = False) -> tuple:
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"""接收selenium定位元组或本库定位语法，转换为标准定位元组，可翻译css selector为xpath \n
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:param loc: selenium定位元组或本库定位语法
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:param translate_css: 是否翻译css selector为xpath
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:return: DrissionPage定位元组
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"""
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if isinstance(loc, tuple):
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loc = translate_loc(loc)
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elif isinstance(loc, str):
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loc = str_to_loc(loc)
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else:
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raise TypeError('loc参数只能是tuple或str。')
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if loc[0] == 'css selector' and translate_css:
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from lxml.cssselect import CSSSelector, ExpressionError
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try:
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path = str(CSSSelector(loc[1], translator='html').path)
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path = path[20:] if path.startswith('descendant-or-self::') else path
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loc = 'xpath', path
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except ExpressionError:
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pass
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return loc
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def str_to_loc(loc: str) -> tuple:
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"""处理元素查找语句 \n
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查找方式：属性、tag name及属性、文本、xpath、css selector、id、class \n
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@表示属性，.表示class，#表示id，=表示精确匹配，:表示模糊匹配，无控制字符串时默认搜索该字符串 \n
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"""
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loc_by = 'xpath'
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if loc.startswith('.'):
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if loc.startswith(('.=', '.:',)):
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loc = loc.replace('.', '@class', 1)
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else:
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loc = loc.replace('.', '@class=', 1)
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elif loc.startswith('#'):
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if loc.startswith(('#=', '#:',)):
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loc = loc.replace('#', '@id', 1)
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else:
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loc = loc.replace('#', '@id=', 1)
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elif loc.startswith(('t:', 't=')):
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loc = f'tag:{loc[2:]}'
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elif loc.startswith(('tx:', 'tx=')):
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loc = f'text{loc[2:]}'
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# ------------------------------------------------------------------
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# 多属性查找
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if loc.startswith('@@') and loc != '@@':
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loc_str = _make_multi_xpath_str('*', loc)
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# 单属性查找
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elif loc.startswith('@') and loc != '@':
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loc_str = _make_single_xpath_str('*', loc)
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# 根据tag name查找
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elif loc.startswith(('tag:', 'tag=')) and loc not in ('tag:', 'tag='):
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at_ind = loc.find('@')
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if at_ind == -1:
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loc_str = f'//*[name()="{loc[4:]}"]'
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else:
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if loc[at_ind:].startswith('@@'):
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loc_str = _make_multi_xpath_str(loc[4:at_ind], loc[at_ind:])
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else:
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loc_str = _make_single_xpath_str(loc[4:at_ind], loc[at_ind:])
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# 根据文本查找
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elif loc.startswith('text='):
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loc_str = f'//*[.={_make_search_str(loc[5:])}]'
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elif loc.startswith('text:') and loc != 'text:':
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loc_str = f'//*/text()[contains(., {_make_search_str(loc[5:])})]/..'
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# 用xpath查找
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elif loc.startswith(('xpath:', 'xpath=')) and loc not in ('xpath:', 'xpath='):
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loc_str = loc[6:]
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elif loc.startswith(('x:', 'x=')) and loc not in ('x:', 'x='):
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loc_str = loc[2:]
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# 用css selector查找
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elif loc.startswith(('css:', 'css=')) and loc not in ('css:', 'css='):
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loc_by = 'css selector'
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loc_str = loc[4:]
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elif loc.startswith(('c:', 'c=')) and loc not in ('c:', 'c='):
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loc_by = 'css selector'
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loc_str = loc[2:]
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# 根据文本模糊查找
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elif loc:
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loc_str = f'//*/text()[contains(., {_make_search_str(loc)})]/..'
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else:
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loc_str = '//*'
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return loc_by, loc_str
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def _make_single_xpath_str(tag: str, text: str) -> str:
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"""生成xpath语句 \n
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:param tag: 标签名
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:param text: 待处理的字符串
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:return: xpath字符串
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"""
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arg_list = [] if tag == '*' else [f'name()="{tag}"']
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arg_str = txt_str = ''
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if text == '@':
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arg_str = 'not(@*)'
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else:
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r = split(r'([:=])', text, maxsplit=1)
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len_r = len(r)
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len_r0 = len(r[0])
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if len_r != 3 and len_r0 > 1:
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arg_str = 'normalize-space(text())' if r[0] in ('@text()', '@tx()') else f'{r[0]}'
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elif len_r == 3 and len_r0 > 1:
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if r[1] == '=': # 精确查找
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arg = '.' if r[0] in ('@text()', '@tx()') else r[0]
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arg_str = f'{arg}={_make_search_str(r[2])}'
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else: # 模糊查找
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if r[0] in ('@text()', '@tx()'):
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txt_str = f'/text()[contains(., {_make_search_str(r[2])})]/..'
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arg_str = ''
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else:
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arg_str = f"contains({r[0]},{_make_search_str(r[2])})"
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if arg_str:
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arg_list.append(arg_str)
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arg_str = ' and '.join(arg_list)
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return f'//*[{arg_str}]{txt_str}' if arg_str else f'//*{txt_str}'
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def _make_multi_xpath_str(tag: str, text: str) -> str:
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"""生成多属性查找的xpath语句 \n
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:param tag: 标签名
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:param text: 待处理的字符串
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:return: xpath字符串
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"""
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arg_list = [] if tag == '*' else [f'name()="{tag}"']
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args = text.split('@@')
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for arg in args[1:]:
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r = split(r'([:=])', arg, maxsplit=1)
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arg_str = ''
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len_r = len(r)
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if not r[0]: # 不查询任何属性
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arg_str = 'not(@*)'
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else:
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r[0], ignore = (r[0][1:], True) if r[0][0] == '-' else (r[0], None) # 是否去除某个属性
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if len_r != 3: # 只有属性名没有属性内容，查询是否存在该属性
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arg_str = 'normalize-space(text())' if r[0] in ('text()', 'tx()') else f'@{r[0]}'
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elif len_r == 3: # 属性名和内容都有
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arg = '.' if r[0] in ('text()', 'tx()') else f'@{r[0]}'
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if r[1] == '=':
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arg_str = f'{arg}={_make_search_str(r[2])}'
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else:
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arg_str = f'contains({arg},{_make_search_str(r[2])})'
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if arg_str and ignore:
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arg_str = f'not({arg_str})'
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if arg_str:
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arg_list.append(arg_str)
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arg_str = ' and '.join(arg_list)
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return f'//*[{arg_str}]' if arg_str else f'//*'
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def _make_search_str(search_str: str) -> str:
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"""将"转义，不知何故不能直接用 \ 来转义 \n
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:param search_str: 查询字符串
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:return: 把"转义后的字符串
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"""
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parts = search_str.split('"')
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parts_num = len(parts)
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search_str = 'concat('
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for key, i in enumerate(parts):
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search_str += f'"{i}"'
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search_str += ',' + '\'"\',' if key < parts_num - 1 else ''
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search_str += ',"")'
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return search_str
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def translate_loc(loc: tuple) -> tuple:
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"""把By类型的loc元组转换为css selector或xpath类型的 \n
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:param loc: By类型的loc元组
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:return: css selector或xpath类型的loc元组
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"""
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if len(loc) != 2:
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raise ValueError('定位符长度必须为2。')
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loc_by = 'xpath'
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loc_0 = loc[0].lower()
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if loc_0 == 'xpath':
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loc_str = loc[1]
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elif loc_0 == 'css selector':
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loc_by = loc_0
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loc_str = loc[1]
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elif loc_0 == 'id':
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loc_str = f'//*[@id="{loc[1]}"]'
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elif loc_0 == 'class name':
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loc_str = f'//*[@class="{loc[1]}"]'
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elif loc_0 == 'link text':
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loc_str = f'//a[text()="{loc[1]}"]'
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elif loc_0 == 'name':
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loc_str = f'//*[@name="{loc[1]}"]'
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elif loc_0 == 'tag name':
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loc_str = f'//{loc[1]}'
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elif loc_0 == 'partial link text':
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loc_str = f'//a[contains(text(),"{loc[1]}")]'
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else:
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raise ValueError('无法识别的定位符。')
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return loc_by, loc_str
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def format_html(text: str) -> str:
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"""处理html编码字符 \n
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:param text: html文本
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:return: 格式化后的html文本
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"""
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return unescape(text).replace('\xa0', ' ') if text else text
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def clean_folder(folder_path: str, ignore: list = None) -> None:
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"""清空一个文件夹，除了ignore里的文件和文件夹 \n
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:param folder_path: 要清空的文件夹路径
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:param ignore: 忽略列表
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:return: None
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"""
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ignore = [] if not ignore else ignore
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p = Path(folder_path)
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for f in p.iterdir():
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if f.name not in ignore:
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if f.is_file():
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f.unlink()
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elif f.is_dir():
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rmtree(f, True)
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def unzip(zip_path: str, to_path: str) -> Union[list, None]:
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"""解压下载的chromedriver.zip文件"""
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if not zip_path:
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return
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with ZipFile(zip_path, 'r') as f:
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return [f.extract(f.namelist()[0], path=to_path)]
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def get_exe_path_from_port(port: Union[str, int]) -> Union[str, None]:
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"""获取端口号第一条进程的可执行文件路径 \n
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:param port: 端口号
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:return: 可执行文件的绝对路径
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"""
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from os import popen
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from time import perf_counter
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process = popen(f'netstat -ano |findstr {port}').read().split('\n')[0]
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t = perf_counter()
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while not process and perf_counter() - t < 10:
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process = popen(f'netstat -ano |findstr {port}').read().split('\n')[0]
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processid = process.split(' ')[-1]
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if not processid:
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return
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else:
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file_lst = popen(f'wmic process where processid={processid} get executablepath').read().split('\n')
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return file_lst[2].strip() if len(file_lst) > 2 else None
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def get_usable_path(path: Union[str, Path]) -> Path:
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"""检查文件或文件夹是否有重名，并返回可以使用的路径 \n
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:param path: 文件或文件夹路径
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:return: 可用的路径，Path对象
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"""
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path = Path(path)
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parent = path.parent
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path = parent / make_valid_name(path.name)
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name = path.stem if path.is_file() else path.name
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ext = path.suffix if path.is_file() else ''
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first_time = True
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while path.exists():
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r = search(r'(.*)_(\d+)$', name)
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if not r or (r and first_time):
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src_name, num = name, '1'
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else:
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src_name, num = r.group(1), int(r.group(2)) + 1
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name = f'{src_name}_{num}'
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path = parent / f'{name}{ext}'
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first_time = None
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return path
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def make_valid_name(full_name: str) -> str:
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"""获取有效的文件名 \n
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:param full_name: 文件名
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:return: 可用的文件名
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"""
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# ----------------去除前后空格----------------
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full_name = full_name.strip()
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# ----------------使总长度不大于255个字符（一个汉字是2个字符）----------------
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r = search(r'(.*)(\.[^.]+$)', full_name) # 拆分文件名和后缀名
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if r:
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name, ext = r.group(1), r.group(2)
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ext_long = len(ext)
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else:
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name, ext = full_name, ''
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ext_long = 0
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while get_long(name) > 255 - ext_long:
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name = name[:-1]
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full_name = f'{name}{ext}'
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# ----------------去除不允许存在的字符----------------
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return sub(r'[<>/\\|:*?\n]', '', full_name)
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def get_long(txt) -> int:
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"""返回字符串中字符个数（一个汉字是2个字符） \n
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:param txt: 字符串
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:return: 字符个数
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"""
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txt_len = len(txt)
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return int((len(txt.encode('utf-8')) - txt_len) / 2 + txt_len)
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