def normalize_node(element: HtmlElement):
etree.strip_elements(element, *USELESS_TAG)
for node in iter_node(element):
# inspired by readability.
if node.tag.lower(
) in TAGS_CAN_BE_REMOVE_IF_EMPTY and is_empty_element(node):
remove_node(node)
# merge text in span or strong to parent p tag
if node.tag.lower() == 'p':
etree.strip_tags(node, 'span')
etree.strip_tags(node, 'strong')
# if a div tag does not contain any sub node, it could be converted to p node.
if node.tag.lower() == 'div' and not node.getchildren():
node.tag = 'p'
if node.tag.lower() == 'span' and not node.getchildren():
node.tag = 'p'
# remove empty p tag
if node.tag.lower() == 'p' and not node.xpath('.//img'):
if not (node.text and node.text.strip()):
drop_tag(node)
class_name = node.get('class')
if class_name:
for attribute in USELESS_ATTR:
if attribute in class_name:
remove_node(node)
break
def preprocess4list(element: Element):
"""
preprocess element for list extraction
:param element:
:return:
"""
# remove tag and its content
etree.strip_elements(element, *CONTENT_USELESS_TAGS)
# only move tag pair
etree.strip_tags(element, *CONTENT_STRIP_TAGS)
remove_children(element, CONTENT_NOISE_XPATHS)
for child in children(element):
# merge text in span or strong to parent p tag
if child.tag.lower() == 'p':
etree.strip_tags(child, 'span')
etree.strip_tags(child, 'strong')
if not (child.text and child.text.strip()):
remove_element(child)
# if a div tag does not contain any sub node, it could be converted to p node.
if child.tag.lower() == 'div' and not child.getchildren():
child.tag = 'p'
def normalize_node(element: HtmlElement):
# 去除etree中的某个子节点
etree.strip_elements(element, *USELESS_TAG)
for node in iter_node(element):
# inspired by readability.
if node.tag.lower(
) in TAGS_CAN_BE_REMOVE_IF_EMPTY and is_empty_element(node):
remove_node(node)
# 参数中的标签从源element中删除，并且把里面的标签文本给合并进来
if node.tag.lower() == 'p':
etree.strip_tags(node, 'span')
etree.strip_tags(node, 'strong')
# 如果div标记不包含任何子节点，则可以将其转换为p节点。
if node.tag.lower() == 'div' and not node.getchildren():
node.tag = 'p'
if node.tag.lower() == 'span' and not node.getchildren():
node.tag = 'p'
# remove empty p tag
if node.tag.lower() == 'p' and not node.xpath('.//img'):
if not (node.text and node.text.strip()):
drop_tag(node)
class_name = node.get('class')
if class_name:
for attribute in USELESS_ATTR:
if attribute in class_name:
remove_node(node)
break
def check_enc_fixed(url):
print "\n\n"
print "That is url {}".format(url)
r = requests.get(url)
ud = UnicodeDammit(r.content, is_html=True)
print "\t\t\t\t\t\t", ud.original_encoding == ud.declared_html_encoding
if not ud.original_encoding == ud.declared_html_encoding:
print ("Origignal encoding: {} vs declared_html_encoding: {}"
"".format(ud.original_encoding, ud.declared_html_encoding))
print "Detected encoding: {!r}". format(chardet.detect(r.content))
enc = ud.original_encoding.lower()
declared_enc = ud.declared_html_encoding
if declared_enc:
declared_enc = declared_enc.lower()
# possible misregocnition of an encoding
if (declared_enc and enc != declared_enc):
detect_dict = chardet.detect(r.content)
det_conf = detect_dict["confidence"]
det_enc = detect_dict["encoding"].lower()
if enc == det_enc and det_conf < THRESHOLD_OF_CHARDETECT:
enc = declared_enc
print "CHOOSED ENCODING: {}".format(enc)
# if page contains any characters that differ from the main
# encodin we will ignore them
content = r.content.decode(enc, "ignore").encode(enc)
htmlparser = etree.HTMLParser(encoding=enc)
root = etree.HTML(content, parser=htmlparser)
etree.strip_elements(root, html.etree.Comment, "script", "style")
text = html.tostring(root, method="text", encoding=unicode)
text = re.sub('\s+', ' ', text)
print text[:200]
def check_enc_fixed(url):
print "\n\n"
print "That is url {}".format(url)
r = requests.get(url)
ud = UnicodeDammit(r.content, is_html=True)
print "\t\t\t\t\t\t", ud.original_encoding == ud.declared_html_encoding
if not ud.original_encoding == ud.declared_html_encoding:
print("Origignal encoding: {} vs declared_html_encoding: {}"
"".format(ud.original_encoding, ud.declared_html_encoding))
print "Detected encoding: {!r}".format(chardet.detect(r.content))
enc = ud.original_encoding.lower()
declared_enc = ud.declared_html_encoding
if declared_enc:
declared_enc = declared_enc.lower()
# possible misregocnition of an encoding
if (declared_enc and enc != declared_enc):
detect_dict = chardet.detect(r.content)
det_conf = detect_dict["confidence"]
det_enc = detect_dict["encoding"].lower()
if enc == det_enc and det_conf < THRESHOLD_OF_CHARDETECT:
enc = declared_enc
print "CHOOSED ENCODING: {}".format(enc)
# if page contains any characters that differ from the main
# encodin we will ignore them
content = r.content.decode(enc, "ignore").encode(enc)
htmlparser = etree.HTMLParser(encoding=enc)
root = etree.HTML(content, parser=htmlparser)
etree.strip_elements(root, html.etree.Comment, "script", "style")
text = html.tostring(root, method="text", encoding=unicode)
text = re.sub('\s+', ' ', text)
print text[:200]
def _get_text(self, remove_newlines=True):
""" Retrieves html with provided url and parses it to fully remove
all html tags, style declarations and scripts.
Args:
remove_newlines (bool): wheter perform cleaning of a \n\r
sequencies or not.
Returns:
unicode object of the whole text without html tags
"""
if not self.text:
url = self.url
try:
self.log.debug("Try to get content from page {}".format(url))
r = requests.get(url)
except requests.exceptions.RequestException as e:
self.log.warn("Unable to get page content of the url: {url}. "
"The reason: {exc!r}".format(url=url, exc=e))
raise ParsingError(e.strerror)
ud = UnicodeDammit(r.content, is_html=True)
enc = ud.original_encoding.lower()
declared_enc = ud.declared_html_encoding
if declared_enc:
declared_enc = declared_enc.lower()
# possible misregocnition of an encoding
if (declared_enc and enc != declared_enc):
detect_dict = chardet.detect(r.content)
det_conf = detect_dict["confidence"]
det_enc = detect_dict["encoding"].lower()
if enc == det_enc and det_conf < THRESHOLD_OF_CHARDETECT:
enc = declared_enc
# if page contains any characters that differ from the main
# encoding we will ignore them
content = r.content.decode(enc, "ignore").encode(enc)
htmlparser = etree.HTMLParser(encoding=enc)
root = etree.HTML(content, parser=htmlparser)
etree.strip_elements(root, html.etree.Comment, "script", "style")
text = html.tostring(root, method="text", encoding="unicode")
if remove_newlines:
self.log.debug(str(type(text)))
text = re.sub('\s+', ' ', text)
self.text = text
return self.text
def _get_text(self, remove_newlines=True):
""" Retrieves html with provided url and parses it to fully remove
all html tags, style declarations and scripts.
Args:
remove_newlines (bool): wheter perform cleaning of a \n\r
sequencies or not.
Returns:
unicode object of the whole text without html tags
"""
if not self.text:
url = self.url
try:
self.log.debug("Try to get content from page {}".format(url))
r = requests.get(url)
except requests.exceptions.RequestException as e:
self.log.warn("Unable to get page content of the url: {url}. "
"The reason: {exc!r}".format(url=url, exc=e))
raise ParsingError(e.strerror)
ud = UnicodeDammit(r.content, is_html=True)
enc = ud.original_encoding.lower()
declared_enc = ud.declared_html_encoding
if declared_enc:
declared_enc = declared_enc.lower()
# possible misregocnition of an encoding
if (declared_enc and enc != declared_enc):
detect_dict = chardet.detect(r.content)
det_conf = detect_dict["confidence"]
det_enc = detect_dict["encoding"].lower()
if enc == det_enc and det_conf < THRESHOLD_OF_CHARDETECT:
enc = declared_enc
# if page contains any characters that differ from the main
# encoding we will ignore them
content = r.content.decode(enc, "ignore").encode(enc)
htmlparser = etree.HTMLParser(encoding=enc)
root = etree.HTML(content, parser=htmlparser)
etree.strip_elements(root, html.etree.Comment, "script", "style")
text = html.tostring(root, method="text", encoding="unicode")
if remove_newlines:
self.log.debug(str(type(text)))
text = re.sub('\s+', ' ', text)
self.text = text
return self.text
def ExtactProcess(self, htmlText, isIndex):
htmlText = re.sub(r'</?span.*?>|&.{1,6}?;|</?tr.*?>|</?td.*?>',
'',
htmlText,
flags=re.S)
etreeObj = etree.HTML(htmlText)
self.titleText = self.ChangeNodeText("".join(
etreeObj.xpath('//title/text()')))
etree.strip_elements(etreeObj,
*EXTRACT_IFNO['USELESS_TAG'],
with_tail=False)
if isIndex:
self.ExtractIndexPro(etreeObj)
self.ExtractIndexDate("".join(etreeObj.xpath('//text()')))
else:
self.ExtractPagePro(etreeObj)
def normalize_node(element: HtmlElement):
etree.strip_elements(element, *USELESS_TAG)
for node in iter_node(element):
# if node.tag.lower() in USELESS_TAG:
# remove_node(node)
# inspired by readability.
if node.tag.lower(
) in TAGS_CAN_BE_REMOVE_IF_EMPTY and is_empty_element(node):
remove_node(node)
# p 标签下面的 span 标签中的文字，可以合并到 p 标签中
if node.tag.lower() == 'p':
etree.strip_tags(node, 'span')
etree.strip_tags(node, 'strong')
# if a div tag does not contain any sub node, it could be converted to p node.
if node.tag.lower() == 'div' and not node.getchildren():
node.tag = 'p'
if node.tag.lower() == 'span' and not node.getchildren():
node.tag = 'p'
# remove empty p tag
if node.tag.lower() == 'p' and not node.xpath('.//img'):
if not (node.text and node.text.strip()):
drop_tag(node)
class_name = node.get('class')
if class_name:
for attribute in USELESS_ATTR:
if ' ' in class_name: # 判断类名是否有多个以空格相隔，先切割，#构建列表
classnames = class_name.split(' ')
else:
classnames = [class_name] # 只有一个
for name in classnames: # 遍历列表中的类名，判断是否存在需删除的类名
if attribute == name:
remove_node(node)
break
def prune(self, tag: str):
self.opseq.append(lambda s: etree.strip_elements(s, tag) or s)
return self