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htmlParser.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# File : htmlParser.py
# Author: DaShenHan&道长-----先苦后甜，任凭晚风拂柳颜------
# Date : 2022/8/25
# upDate : 2022/11/17 支持 -- 剔除元素 多个剔除
import ujson
from pyquery import PyQuery as pq
from urllib.parse import urljoin
import re
from jsonpath import jsonpath
PARSE_CACHE = True # 解析缓存
NOADD_INDEX = ':eq|:lt|:gt|:first|:last|^body$|^#' # 不自动加eq下标索引
URLJOIN_ATTR = '(url|src|href|-original|-src|-play|-url|style)$' # 需要自动urljoin的属性
SPECIAL_URL = '^(ftp|magnet|thunder|ws):' # 过滤特殊链接,不走urlJoin
class jsoup:
def __init__(self, MY_URL=''):
self.MY_URL = MY_URL
self.pdfh_html = ''
self.pdfa_html = ''
self.pdfh_doc = None
self.pdfa_doc = None
def test(self, text: str, string: str):
"""
正则判断字符串包含，模仿js的 //.test()
:param text:
:param string:
:return:
"""
searchObj = re.search(rf'{text}', string, re.M | re.I)
test_ret = True if searchObj else False
return test_ret
def contains(self, text: str, match: str):
# return match in text
return text.find(match) > -1
def parseHikerToJq(self, parse, first=False):
"""
海阔解析表达式转原生表达式,自动补eq,如果传了first就最后一个也取eq(0)
:param parse:
:param first:
:return:
"""
if self.contains(parse, '&&'):
parse = parse.split('&&') # 带&&的重新拼接
new_parses = [] # 构造新的解析表达式列表
for i in range(len(parse)):
ps = parse[i].split(' ')[-1] # 如果分割&&后带空格就取最后一个元素
if not self.test(NOADD_INDEX, ps):
if not first and i >= len(parse) - 1: # 不传first且遇到最后一个,不用补eq(0)
new_parses.append(parse[i])
else:
new_parses.append(f'{parse[i]}:eq(0)')
else:
new_parses.append(parse[i])
parse = ' '.join(new_parses)
else:
ps = parse.split(' ')[-1] # 如果带空格就取最后一个元素
if not self.test(NOADD_INDEX, ps) and first:
parse = f'{parse}:eq(0)'
return parse
def getParseInfo(self, nparse):
"""
根据传入的单规则获取 parse规则，索引位置,排除列表 -- 可以用于剔除元素,支持多个，按标签剔除，按id剔除等操作
:param nparse:
:return:
"""
excludes = [] # 定义排除列表默认值为空
nparse_index = 0 # 定义位置索引默认值为0
nparse_rule = nparse # 定义规则默认值为本身
if self.contains(nparse, ':eq'):
nparse_rule = nparse.split(':eq')[0]
nparse_pos = nparse.split(':eq')[1]
# print(nparse_rule)
if self.contains(nparse_rule, '--'):
excludes = nparse_rule.split('--')[1:]
nparse_rule = nparse_rule.split('--')[0]
elif self.contains(nparse_pos, '--'):
excludes = nparse_pos.split('--')[1:]
nparse_pos = nparse_pos.split('--')[0]
try:
nparse_index = int(nparse_pos.split('(')[1].split(')')[0])
except:
pass
elif self.contains(nparse, '--'):
nparse_rule = nparse.split('--')[0]
excludes = nparse.split('--')[1:]
# if nparse_index > 0:
# print(f'nparse_rule:{nparse_rule},nparse_index:{nparse_index},excludes:{excludes}')
return nparse_rule, nparse_index, excludes
def parseOneRule(self, doc, nparse, ret=None):
"""
解析空格分割后的原生表达式中的一条记录,正确处理eq的索引，返回处理后的ret
:param doc: pq(html) load 后的pq对象
:param nparse: 当前单个解析表达式
:param ret: pd对象结果
:return:
"""
nparse_rule, nparse_index, excludes = self.getParseInfo(nparse)
if not ret:
ret = doc(nparse_rule)
else:
ret = ret(nparse_rule)
# print(f'nparse_rule:{nparse_rule},nparse_index:{nparse_index},excludes:{excludes},ret:{ret}')
if self.contains(nparse, ':eq'):
ret = ret.eq(nparse_index)
# if nparse_index > 4:
# print('nparse_index',ret,not ret)
if excludes and ret:
# print(excludes)
ret = ret.clone() # 克隆一个,免得直接remove会影响doc的缓存
for exclude in excludes:
# ret.remove(exclude)
ret(exclude).remove()
return ret
def pdfa(self, html, parse: str):
# 看官方文档才能解决这个问题!!!
# https://pyquery.readthedocs.io/en/latest/api.html
if not all([html, parse]):
return []
parse = self.parseHikerToJq(parse)
print(f'pdfa:{parse}')
if PARSE_CACHE:
if self.pdfa_html != html:
self.pdfa_html = html
self.pdfa_doc = pq(html)
doc = self.pdfa_doc
else:
doc = pq(html)
parses = parse.split(' ')
# print(parses)
ret = None
for nparse in parses:
ret = self.parseOneRule(doc, nparse, ret)
if not ret: # 可能循环取值后ret 对应eq取完无值了，pdfa直接返回空列表
return []
res = [item.outerHtml() for item in ret.items()]
return res
def pdfh(self, html, parse: str, base_url: str = ''):
if not all([html, parse]):
return ''
if PARSE_CACHE:
if self.pdfh_html != html:
self.pdfh_html = html
self.pdfh_doc = pq(html)
doc = self.pdfh_doc
else:
doc = pq(html)
if parse == 'body&&Text' or parse == 'Text':
text = doc.text()
return text
elif parse == 'body&&Html' or parse == 'Html':
return doc.html()
option = None
if self.contains(parse, '&&'):
option = parse.split('&&')[-1]
parse = '&&'.join(parse.split('&&')[:-1])
parse = self.parseHikerToJq(parse, True)
# print(f'pdfh:{parse},option:{option}')
parses = parse.split(' ')
# print(parses)
ret = None
for nparse in parses:
ret = self.parseOneRule(doc, nparse, ret)
# print(nparse,ret)
if not ret: # 可能循环取值后ret 对应eq取完无值了，pdfh直接返回空字符串
return ''
if option:
if option == 'Text':
ret = ret.text()
elif option == 'Html':
ret = ret.html()
else:
ret = ret.attr(option) or ''
if self.contains(option.lower(), 'style') and self.contains(ret, 'url('):
try:
ret = re.search('url\((.*?)\)', ret, re.M | re.S).groups()[0]
# 2023/07/28新增 style取内部链接自动去除首尾单双引号
ret = re.sub(r"^['\"]|['\"]$", '', ret)
except:
pass
if ret and base_url:
# need_add = re.search(URLJOIN_ATTR, option, re.M | re.I)
need_add = self.test(URLJOIN_ATTR, option) and not self.test(SPECIAL_URL, ret)
if need_add:
if 'http' in ret:
ret = ret[ret.find('http'):]
else:
ret = urljoin(base_url, ret)
else:
ret = ret.outerHtml()
return ret
def pd(self, html, parse: str, base_url: str = ''):
if not base_url:
base_url = self.MY_URL
return self.pdfh(html, parse, base_url)
def pq(self, html: str):
return pq(html)
def pjfh(self, html, parse: str, add_url=False):
if not all([html, parse]):
return ''
if isinstance(html, str):
# print(html)
try:
html = ujson.loads(html)
# html = eval(html)
except:
print('字符串转json失败')
return ''
if not parse.startswith('$.'):
parse = f'$.{parse}'
ret = ''
for ps in parse.split('||'):
ret = jsonpath(html, ps)
if isinstance(ret, list):
ret = str(ret[0]) if ret[0] else ''
else:
ret = str(ret) if ret else ''
if add_url and ret:
ret = urljoin(self.MY_URL, ret)
if ret:
break
# print(ret)
return ret
def pj(self, html, parse: str):
return self.pjfh(html, parse, True)
def pjfa(self, html, parse: str):
if not all([html, parse]):
return []
if isinstance(html, str):
try:
html = ujson.loads(html)
except:
return []
if not parse.startswith('$.'):
parse = f'$.{parse}'
# print(html)
# print(parse)
ret = jsonpath(html, parse)
# print(ret)
# print(type(ret))
# print(type(ret[0]))
# print(len(ret))
if isinstance(ret, list) and isinstance(ret[0], list) and len(ret) == 1:
# print('自动解包')
ret = ret[0] # 自动解包
return ret or []
if __name__ == '__main__':
pass