mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-14 05:15:12 -05:00
0d9fbc1ad7
This version of SickBeard uses both TVDB and TVRage to search and gather it's series data from allowing you to now have access to and download shows that you couldn't before because of being locked into only what TheTVDB had to offer. Also this edition is based off the code we used in our XEM editon so it does come with scene numbering support as well as all the other features our XEM edition has to offer. Please before using this with your existing database (sickbeard.db) please make a backup copy of it and delete any other database files such as cache.db and failed.db if present, we HIGHLY recommend starting out with no database files at all to make this a fresh start but the choice is at your own risk! Enjoy!
1612 lines
60 KiB
Python
1612 lines
60 KiB
Python
import collections
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import re
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import sys
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import warnings
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from bs4.dammit import EntitySubstitution
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DEFAULT_OUTPUT_ENCODING = "utf-8"
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PY3K = (sys.version_info[0] > 2)
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whitespace_re = re.compile("\s+")
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def _alias(attr):
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"""Alias one attribute name to another for backward compatibility"""
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@property
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def alias(self):
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return getattr(self, attr)
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@alias.setter
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def alias(self):
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return setattr(self, attr)
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return alias
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class NamespacedAttribute(unicode):
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def __new__(cls, prefix, name, namespace=None):
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if name is None:
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obj = unicode.__new__(cls, prefix)
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elif prefix is None:
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# Not really namespaced.
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obj = unicode.__new__(cls, name)
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else:
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obj = unicode.__new__(cls, prefix + ":" + name)
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obj.prefix = prefix
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obj.name = name
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obj.namespace = namespace
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return obj
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class AttributeValueWithCharsetSubstitution(unicode):
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"""A stand-in object for a character encoding specified in HTML."""
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class CharsetMetaAttributeValue(AttributeValueWithCharsetSubstitution):
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"""A generic stand-in for the value of a meta tag's 'charset' attribute.
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When Beautiful Soup parses the markup '<meta charset="utf8">', the
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value of the 'charset' attribute will be one of these objects.
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"""
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def __new__(cls, original_value):
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obj = unicode.__new__(cls, original_value)
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obj.original_value = original_value
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return obj
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def encode(self, encoding):
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return encoding
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class ContentMetaAttributeValue(AttributeValueWithCharsetSubstitution):
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"""A generic stand-in for the value of a meta tag's 'content' attribute.
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When Beautiful Soup parses the markup:
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<meta http-equiv="content-type" content="text/html; charset=utf8">
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The value of the 'content' attribute will be one of these objects.
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"""
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CHARSET_RE = re.compile("((^|;)\s*charset=)([^;]*)", re.M)
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def __new__(cls, original_value):
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match = cls.CHARSET_RE.search(original_value)
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if match is None:
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# No substitution necessary.
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return unicode.__new__(unicode, original_value)
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obj = unicode.__new__(cls, original_value)
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obj.original_value = original_value
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return obj
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def encode(self, encoding):
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def rewrite(match):
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return match.group(1) + encoding
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return self.CHARSET_RE.sub(rewrite, self.original_value)
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class HTMLAwareEntitySubstitution(EntitySubstitution):
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"""Entity substitution rules that are aware of some HTML quirks.
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Specifically, the contents of <script> and <style> tags should not
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undergo entity substitution.
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Incoming NavigableString objects are checked to see if they're the
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direct children of a <script> or <style> tag.
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"""
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cdata_containing_tags = set(["script", "style"])
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preformatted_tags = set(["pre"])
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@classmethod
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def _substitute_if_appropriate(cls, ns, f):
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if (isinstance(ns, NavigableString)
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and ns.parent is not None
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and ns.parent.name in cls.cdata_containing_tags):
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# Do nothing.
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return ns
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# Substitute.
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return f(ns)
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@classmethod
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def substitute_html(cls, ns):
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return cls._substitute_if_appropriate(
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ns, EntitySubstitution.substitute_html)
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@classmethod
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def substitute_xml(cls, ns):
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return cls._substitute_if_appropriate(
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ns, EntitySubstitution.substitute_xml)
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class PageElement(object):
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"""Contains the navigational information for some part of the page
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(either a tag or a piece of text)"""
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# There are five possible values for the "formatter" argument passed in
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# to methods like encode() and prettify():
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#
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# "html" - All Unicode characters with corresponding HTML entities
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# are converted to those entities on output.
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# "minimal" - Bare ampersands and angle brackets are converted to
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# XML entities: & < >
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# None - The null formatter. Unicode characters are never
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# converted to entities. This is not recommended, but it's
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# faster than "minimal".
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# A function - This function will be called on every string that
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# needs to undergo entity substitution.
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#
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# In an HTML document, the default "html" and "minimal" functions
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# will leave the contents of <script> and <style> tags alone. For
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# an XML document, all tags will be given the same treatment.
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HTML_FORMATTERS = {
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"html" : HTMLAwareEntitySubstitution.substitute_html,
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"minimal" : HTMLAwareEntitySubstitution.substitute_xml,
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None : None
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}
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XML_FORMATTERS = {
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"html" : EntitySubstitution.substitute_html,
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"minimal" : EntitySubstitution.substitute_xml,
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None : None
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}
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def format_string(self, s, formatter='minimal'):
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"""Format the given string using the given formatter."""
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if not callable(formatter):
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formatter = self._formatter_for_name(formatter)
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if formatter is None:
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output = s
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else:
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output = formatter(s)
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return output
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@property
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def _is_xml(self):
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"""Is this element part of an XML tree or an HTML tree?
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This is used when mapping a formatter name ("minimal") to an
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appropriate function (one that performs entity-substitution on
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the contents of <script> and <style> tags, or not). It's
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inefficient, but it should be called very rarely.
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"""
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if self.parent is None:
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# This is the top-level object. It should have .is_xml set
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# from tree creation. If not, take a guess--BS is usually
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# used on HTML markup.
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return getattr(self, 'is_xml', False)
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return self.parent._is_xml
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def _formatter_for_name(self, name):
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"Look up a formatter function based on its name and the tree."
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if self._is_xml:
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return self.XML_FORMATTERS.get(
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name, EntitySubstitution.substitute_xml)
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else:
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return self.HTML_FORMATTERS.get(
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name, HTMLAwareEntitySubstitution.substitute_xml)
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def setup(self, parent=None, previous_element=None):
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"""Sets up the initial relations between this element and
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other elements."""
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self.parent = parent
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self.previous_element = previous_element
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if previous_element is not None:
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self.previous_element.next_element = self
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self.next_element = None
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self.previous_sibling = None
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self.next_sibling = None
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if self.parent is not None and self.parent.contents:
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self.previous_sibling = self.parent.contents[-1]
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self.previous_sibling.next_sibling = self
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nextSibling = _alias("next_sibling") # BS3
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previousSibling = _alias("previous_sibling") # BS3
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def replace_with(self, replace_with):
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if replace_with is self:
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return
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if replace_with is self.parent:
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raise ValueError("Cannot replace a Tag with its parent.")
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old_parent = self.parent
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my_index = self.parent.index(self)
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self.extract()
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old_parent.insert(my_index, replace_with)
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return self
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replaceWith = replace_with # BS3
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def unwrap(self):
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my_parent = self.parent
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my_index = self.parent.index(self)
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self.extract()
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for child in reversed(self.contents[:]):
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my_parent.insert(my_index, child)
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return self
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replace_with_children = unwrap
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replaceWithChildren = unwrap # BS3
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def wrap(self, wrap_inside):
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me = self.replace_with(wrap_inside)
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wrap_inside.append(me)
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return wrap_inside
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def extract(self):
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"""Destructively rips this element out of the tree."""
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if self.parent is not None:
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del self.parent.contents[self.parent.index(self)]
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#Find the two elements that would be next to each other if
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#this element (and any children) hadn't been parsed. Connect
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#the two.
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last_child = self._last_descendant()
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next_element = last_child.next_element
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if self.previous_element is not None:
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self.previous_element.next_element = next_element
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if next_element is not None:
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next_element.previous_element = self.previous_element
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self.previous_element = None
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last_child.next_element = None
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self.parent = None
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if self.previous_sibling is not None:
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self.previous_sibling.next_sibling = self.next_sibling
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if self.next_sibling is not None:
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self.next_sibling.previous_sibling = self.previous_sibling
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self.previous_sibling = self.next_sibling = None
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return self
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def _last_descendant(self, is_initialized=True, accept_self=True):
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"Finds the last element beneath this object to be parsed."
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if is_initialized and self.next_sibling:
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last_child = self.next_sibling.previous_element
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else:
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last_child = self
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while isinstance(last_child, Tag) and last_child.contents:
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last_child = last_child.contents[-1]
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if not accept_self and last_child == self:
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last_child = None
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return last_child
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# BS3: Not part of the API!
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_lastRecursiveChild = _last_descendant
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def insert(self, position, new_child):
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if new_child is self:
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raise ValueError("Cannot insert a tag into itself.")
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if (isinstance(new_child, basestring)
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and not isinstance(new_child, NavigableString)):
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new_child = NavigableString(new_child)
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position = min(position, len(self.contents))
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if hasattr(new_child, 'parent') and new_child.parent is not None:
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# We're 'inserting' an element that's already one
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# of this object's children.
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if new_child.parent is self:
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current_index = self.index(new_child)
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if current_index < position:
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# We're moving this element further down the list
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# of this object's children. That means that when
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# we extract this element, our target index will
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# jump down one.
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position -= 1
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new_child.extract()
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new_child.parent = self
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previous_child = None
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if position == 0:
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new_child.previous_sibling = None
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new_child.previous_element = self
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else:
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previous_child = self.contents[position - 1]
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new_child.previous_sibling = previous_child
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new_child.previous_sibling.next_sibling = new_child
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new_child.previous_element = previous_child._last_descendant(False)
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if new_child.previous_element is not None:
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new_child.previous_element.next_element = new_child
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new_childs_last_element = new_child._last_descendant(False)
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if position >= len(self.contents):
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new_child.next_sibling = None
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parent = self
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parents_next_sibling = None
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while parents_next_sibling is None and parent is not None:
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parents_next_sibling = parent.next_sibling
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parent = parent.parent
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if parents_next_sibling is not None:
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# We found the element that comes next in the document.
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break
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if parents_next_sibling is not None:
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new_childs_last_element.next_element = parents_next_sibling
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else:
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# The last element of this tag is the last element in
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# the document.
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new_childs_last_element.next_element = None
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else:
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next_child = self.contents[position]
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new_child.next_sibling = next_child
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if new_child.next_sibling is not None:
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new_child.next_sibling.previous_sibling = new_child
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new_childs_last_element.next_element = next_child
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if new_childs_last_element.next_element is not None:
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new_childs_last_element.next_element.previous_element = new_childs_last_element
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self.contents.insert(position, new_child)
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def append(self, tag):
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"""Appends the given tag to the contents of this tag."""
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self.insert(len(self.contents), tag)
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def insert_before(self, predecessor):
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"""Makes the given element the immediate predecessor of this one.
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The two elements will have the same parent, and the given element
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will be immediately before this one.
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"""
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if self is predecessor:
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raise ValueError("Can't insert an element before itself.")
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parent = self.parent
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if parent is None:
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raise ValueError(
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"Element has no parent, so 'before' has no meaning.")
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# Extract first so that the index won't be screwed up if they
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# are siblings.
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if isinstance(predecessor, PageElement):
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predecessor.extract()
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index = parent.index(self)
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parent.insert(index, predecessor)
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def insert_after(self, successor):
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"""Makes the given element the immediate successor of this one.
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The two elements will have the same parent, and the given element
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will be immediately after this one.
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"""
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if self is successor:
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raise ValueError("Can't insert an element after itself.")
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parent = self.parent
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if parent is None:
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raise ValueError(
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"Element has no parent, so 'after' has no meaning.")
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# Extract first so that the index won't be screwed up if they
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# are siblings.
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if isinstance(successor, PageElement):
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successor.extract()
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index = parent.index(self)
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parent.insert(index+1, successor)
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def find_next(self, name=None, attrs={}, text=None, **kwargs):
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"""Returns the first item that matches the given criteria and
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appears after this Tag in the document."""
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return self._find_one(self.find_all_next, name, attrs, text, **kwargs)
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findNext = find_next # BS3
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def find_all_next(self, name=None, attrs={}, text=None, limit=None,
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**kwargs):
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"""Returns all items that match the given criteria and appear
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after this Tag in the document."""
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return self._find_all(name, attrs, text, limit, self.next_elements,
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**kwargs)
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findAllNext = find_all_next # BS3
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def find_next_sibling(self, name=None, attrs={}, text=None, **kwargs):
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"""Returns the closest sibling to this Tag that matches the
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given criteria and appears after this Tag in the document."""
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return self._find_one(self.find_next_siblings, name, attrs, text,
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**kwargs)
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findNextSibling = find_next_sibling # BS3
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def find_next_siblings(self, name=None, attrs={}, text=None, limit=None,
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**kwargs):
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"""Returns the siblings of this Tag that match the given
|
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criteria and appear after this Tag in the document."""
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return self._find_all(name, attrs, text, limit,
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self.next_siblings, **kwargs)
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findNextSiblings = find_next_siblings # BS3
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fetchNextSiblings = find_next_siblings # BS2
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def find_previous(self, name=None, attrs={}, text=None, **kwargs):
|
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"""Returns the first item that matches the given criteria and
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appears before this Tag in the document."""
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return self._find_one(
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self.find_all_previous, name, attrs, text, **kwargs)
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findPrevious = find_previous # BS3
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def find_all_previous(self, name=None, attrs={}, text=None, limit=None,
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**kwargs):
|
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"""Returns all items that match the given criteria and appear
|
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before this Tag in the document."""
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return self._find_all(name, attrs, text, limit, self.previous_elements,
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**kwargs)
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findAllPrevious = find_all_previous # BS3
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fetchPrevious = find_all_previous # BS2
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def find_previous_sibling(self, name=None, attrs={}, text=None, **kwargs):
|
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"""Returns the closest sibling to this Tag that matches the
|
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given criteria and appears before this Tag in the document."""
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return self._find_one(self.find_previous_siblings, name, attrs, text,
|
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**kwargs)
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findPreviousSibling = find_previous_sibling # BS3
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|
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def find_previous_siblings(self, name=None, attrs={}, text=None,
|
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limit=None, **kwargs):
|
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"""Returns the siblings of this Tag that match the given
|
|
criteria and appear before this Tag in the document."""
|
|
return self._find_all(name, attrs, text, limit,
|
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self.previous_siblings, **kwargs)
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findPreviousSiblings = find_previous_siblings # BS3
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fetchPreviousSiblings = find_previous_siblings # BS2
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|
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def find_parent(self, name=None, attrs={}, **kwargs):
|
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"""Returns the closest parent of this Tag that matches the given
|
|
criteria."""
|
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# NOTE: We can't use _find_one because findParents takes a different
|
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# set of arguments.
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r = None
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l = self.find_parents(name, attrs, 1, **kwargs)
|
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if l:
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r = l[0]
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return r
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findParent = find_parent # BS3
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|
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def find_parents(self, name=None, attrs={}, limit=None, **kwargs):
|
|
"""Returns the parents of this Tag that match the given
|
|
criteria."""
|
|
|
|
return self._find_all(name, attrs, None, limit, self.parents,
|
|
**kwargs)
|
|
findParents = find_parents # BS3
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|
fetchParents = find_parents # BS2
|
|
|
|
@property
|
|
def next(self):
|
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return self.next_element
|
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|
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@property
|
|
def previous(self):
|
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return self.previous_element
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|
|
#These methods do the real heavy lifting.
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def _find_one(self, method, name, attrs, text, **kwargs):
|
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r = None
|
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l = method(name, attrs, text, 1, **kwargs)
|
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if l:
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r = l[0]
|
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return r
|
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|
|
def _find_all(self, name, attrs, text, limit, generator, **kwargs):
|
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"Iterates over a generator looking for things that match."
|
|
|
|
if isinstance(name, SoupStrainer):
|
|
strainer = name
|
|
else:
|
|
strainer = SoupStrainer(name, attrs, text, **kwargs)
|
|
|
|
if text is None and not limit and not attrs and not kwargs:
|
|
if name is True or name is None:
|
|
# Optimization to find all tags.
|
|
result = (element for element in generator
|
|
if isinstance(element, Tag))
|
|
return ResultSet(strainer, result)
|
|
elif isinstance(name, basestring):
|
|
# Optimization to find all tags with a given name.
|
|
result = (element for element in generator
|
|
if isinstance(element, Tag)
|
|
and element.name == name)
|
|
return ResultSet(strainer, result)
|
|
results = ResultSet(strainer)
|
|
while True:
|
|
try:
|
|
i = next(generator)
|
|
except StopIteration:
|
|
break
|
|
if i:
|
|
found = strainer.search(i)
|
|
if found:
|
|
results.append(found)
|
|
if limit and len(results) >= limit:
|
|
break
|
|
return results
|
|
|
|
#These generators can be used to navigate starting from both
|
|
#NavigableStrings and Tags.
|
|
@property
|
|
def next_elements(self):
|
|
i = self.next_element
|
|
while i is not None:
|
|
yield i
|
|
i = i.next_element
|
|
|
|
@property
|
|
def next_siblings(self):
|
|
i = self.next_sibling
|
|
while i is not None:
|
|
yield i
|
|
i = i.next_sibling
|
|
|
|
@property
|
|
def previous_elements(self):
|
|
i = self.previous_element
|
|
while i is not None:
|
|
yield i
|
|
i = i.previous_element
|
|
|
|
@property
|
|
def previous_siblings(self):
|
|
i = self.previous_sibling
|
|
while i is not None:
|
|
yield i
|
|
i = i.previous_sibling
|
|
|
|
@property
|
|
def parents(self):
|
|
i = self.parent
|
|
while i is not None:
|
|
yield i
|
|
i = i.parent
|
|
|
|
# Methods for supporting CSS selectors.
|
|
|
|
tag_name_re = re.compile('^[a-z0-9]+$')
|
|
|
|
# /^(\w+)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/
|
|
# \---/ \---/\-------------/ \-------/
|
|
# | | | |
|
|
# | | | The value
|
|
# | | ~,|,^,$,* or =
|
|
# | Attribute
|
|
# Tag
|
|
attribselect_re = re.compile(
|
|
r'^(?P<tag>\w+)?\[(?P<attribute>\w+)(?P<operator>[=~\|\^\$\*]?)' +
|
|
r'=?"?(?P<value>[^\]"]*)"?\]$'
|
|
)
|
|
|
|
def _attr_value_as_string(self, value, default=None):
|
|
"""Force an attribute value into a string representation.
|
|
|
|
A multi-valued attribute will be converted into a
|
|
space-separated stirng.
|
|
"""
|
|
value = self.get(value, default)
|
|
if isinstance(value, list) or isinstance(value, tuple):
|
|
value =" ".join(value)
|
|
return value
|
|
|
|
def _tag_name_matches_and(self, function, tag_name):
|
|
if not tag_name:
|
|
return function
|
|
else:
|
|
def _match(tag):
|
|
return tag.name == tag_name and function(tag)
|
|
return _match
|
|
|
|
def _attribute_checker(self, operator, attribute, value=''):
|
|
"""Create a function that performs a CSS selector operation.
|
|
|
|
Takes an operator, attribute and optional value. Returns a
|
|
function that will return True for elements that match that
|
|
combination.
|
|
"""
|
|
if operator == '=':
|
|
# string representation of `attribute` is equal to `value`
|
|
return lambda el: el._attr_value_as_string(attribute) == value
|
|
elif operator == '~':
|
|
# space-separated list representation of `attribute`
|
|
# contains `value`
|
|
def _includes_value(element):
|
|
attribute_value = element.get(attribute, [])
|
|
if not isinstance(attribute_value, list):
|
|
attribute_value = attribute_value.split()
|
|
return value in attribute_value
|
|
return _includes_value
|
|
elif operator == '^':
|
|
# string representation of `attribute` starts with `value`
|
|
return lambda el: el._attr_value_as_string(
|
|
attribute, '').startswith(value)
|
|
elif operator == '$':
|
|
# string represenation of `attribute` ends with `value`
|
|
return lambda el: el._attr_value_as_string(
|
|
attribute, '').endswith(value)
|
|
elif operator == '*':
|
|
# string representation of `attribute` contains `value`
|
|
return lambda el: value in el._attr_value_as_string(attribute, '')
|
|
elif operator == '|':
|
|
# string representation of `attribute` is either exactly
|
|
# `value` or starts with `value` and then a dash.
|
|
def _is_or_starts_with_dash(element):
|
|
attribute_value = element._attr_value_as_string(attribute, '')
|
|
return (attribute_value == value or attribute_value.startswith(
|
|
value + '-'))
|
|
return _is_or_starts_with_dash
|
|
else:
|
|
return lambda el: el.has_attr(attribute)
|
|
|
|
# Old non-property versions of the generators, for backwards
|
|
# compatibility with BS3.
|
|
def nextGenerator(self):
|
|
return self.next_elements
|
|
|
|
def nextSiblingGenerator(self):
|
|
return self.next_siblings
|
|
|
|
def previousGenerator(self):
|
|
return self.previous_elements
|
|
|
|
def previousSiblingGenerator(self):
|
|
return self.previous_siblings
|
|
|
|
def parentGenerator(self):
|
|
return self.parents
|
|
|
|
|
|
class NavigableString(unicode, PageElement):
|
|
|
|
PREFIX = ''
|
|
SUFFIX = ''
|
|
|
|
def __new__(cls, value):
|
|
"""Create a new NavigableString.
|
|
|
|
When unpickling a NavigableString, this method is called with
|
|
the string in DEFAULT_OUTPUT_ENCODING. That encoding needs to be
|
|
passed in to the superclass's __new__ or the superclass won't know
|
|
how to handle non-ASCII characters.
|
|
"""
|
|
if isinstance(value, unicode):
|
|
return unicode.__new__(cls, value)
|
|
return unicode.__new__(cls, value, DEFAULT_OUTPUT_ENCODING)
|
|
|
|
def __copy__(self):
|
|
return self
|
|
|
|
def __getnewargs__(self):
|
|
return (unicode(self),)
|
|
|
|
def __getattr__(self, attr):
|
|
"""text.string gives you text. This is for backwards
|
|
compatibility for Navigable*String, but for CData* it lets you
|
|
get the string without the CData wrapper."""
|
|
if attr == 'string':
|
|
return self
|
|
else:
|
|
raise AttributeError(
|
|
"'%s' object has no attribute '%s'" % (
|
|
self.__class__.__name__, attr))
|
|
|
|
def output_ready(self, formatter="minimal"):
|
|
output = self.format_string(self, formatter)
|
|
return self.PREFIX + output + self.SUFFIX
|
|
|
|
@property
|
|
def name(self):
|
|
return None
|
|
|
|
@name.setter
|
|
def name(self, name):
|
|
raise AttributeError("A NavigableString cannot be given a name.")
|
|
|
|
class PreformattedString(NavigableString):
|
|
"""A NavigableString not subject to the normal formatting rules.
|
|
|
|
The string will be passed into the formatter (to trigger side effects),
|
|
but the return value will be ignored.
|
|
"""
|
|
|
|
def output_ready(self, formatter="minimal"):
|
|
"""CData strings are passed into the formatter.
|
|
But the return value is ignored."""
|
|
self.format_string(self, formatter)
|
|
return self.PREFIX + self + self.SUFFIX
|
|
|
|
class CData(PreformattedString):
|
|
|
|
PREFIX = u'<![CDATA['
|
|
SUFFIX = u']]>'
|
|
|
|
class ProcessingInstruction(PreformattedString):
|
|
|
|
PREFIX = u'<?'
|
|
SUFFIX = u'?>'
|
|
|
|
class Comment(PreformattedString):
|
|
|
|
PREFIX = u'<!--'
|
|
SUFFIX = u'-->'
|
|
|
|
|
|
class Declaration(PreformattedString):
|
|
PREFIX = u'<!'
|
|
SUFFIX = u'!>'
|
|
|
|
|
|
class Doctype(PreformattedString):
|
|
|
|
@classmethod
|
|
def for_name_and_ids(cls, name, pub_id, system_id):
|
|
value = name or ''
|
|
if pub_id is not None:
|
|
value += ' PUBLIC "%s"' % pub_id
|
|
if system_id is not None:
|
|
value += ' "%s"' % system_id
|
|
elif system_id is not None:
|
|
value += ' SYSTEM "%s"' % system_id
|
|
|
|
return Doctype(value)
|
|
|
|
PREFIX = u'<!DOCTYPE '
|
|
SUFFIX = u'>\n'
|
|
|
|
|
|
class Tag(PageElement):
|
|
|
|
"""Represents a found HTML tag with its attributes and contents."""
|
|
|
|
def __init__(self, parser=None, builder=None, name=None, namespace=None,
|
|
prefix=None, attrs=None, parent=None, previous=None):
|
|
"Basic constructor."
|
|
|
|
if parser is None:
|
|
self.parser_class = None
|
|
else:
|
|
# We don't actually store the parser object: that lets extracted
|
|
# chunks be garbage-collected.
|
|
self.parser_class = parser.__class__
|
|
if name is None:
|
|
raise ValueError("No value provided for new tag's name.")
|
|
self.name = name
|
|
self.namespace = namespace
|
|
self.prefix = prefix
|
|
if attrs is None:
|
|
attrs = {}
|
|
elif attrs and builder.cdata_list_attributes:
|
|
attrs = builder._replace_cdata_list_attribute_values(
|
|
self.name, attrs)
|
|
else:
|
|
attrs = dict(attrs)
|
|
self.attrs = attrs
|
|
self.contents = []
|
|
self.setup(parent, previous)
|
|
self.hidden = False
|
|
|
|
# Set up any substitutions, such as the charset in a META tag.
|
|
if builder is not None:
|
|
builder.set_up_substitutions(self)
|
|
self.can_be_empty_element = builder.can_be_empty_element(name)
|
|
else:
|
|
self.can_be_empty_element = False
|
|
|
|
parserClass = _alias("parser_class") # BS3
|
|
|
|
@property
|
|
def is_empty_element(self):
|
|
"""Is this tag an empty-element tag? (aka a self-closing tag)
|
|
|
|
A tag that has contents is never an empty-element tag.
|
|
|
|
A tag that has no contents may or may not be an empty-element
|
|
tag. It depends on the builder used to create the tag. If the
|
|
builder has a designated list of empty-element tags, then only
|
|
a tag whose name shows up in that list is considered an
|
|
empty-element tag.
|
|
|
|
If the builder has no designated list of empty-element tags,
|
|
then any tag with no contents is an empty-element tag.
|
|
"""
|
|
return len(self.contents) == 0 and self.can_be_empty_element
|
|
isSelfClosing = is_empty_element # BS3
|
|
|
|
@property
|
|
def string(self):
|
|
"""Convenience property to get the single string within this tag.
|
|
|
|
:Return: If this tag has a single string child, return value
|
|
is that string. If this tag has no children, or more than one
|
|
child, return value is None. If this tag has one child tag,
|
|
return value is the 'string' attribute of the child tag,
|
|
recursively.
|
|
"""
|
|
if len(self.contents) != 1:
|
|
return None
|
|
child = self.contents[0]
|
|
if isinstance(child, NavigableString):
|
|
return child
|
|
return child.string
|
|
|
|
@string.setter
|
|
def string(self, string):
|
|
self.clear()
|
|
self.append(string.__class__(string))
|
|
|
|
def _all_strings(self, strip=False, types=(NavigableString, CData)):
|
|
"""Yield all strings of certain classes, possibly stripping them.
|
|
|
|
By default, yields only NavigableString and CData objects. So
|
|
no comments, processing instructions, etc.
|
|
"""
|
|
for descendant in self.descendants:
|
|
if (
|
|
(types is None and not isinstance(descendant, NavigableString))
|
|
or
|
|
(types is not None and type(descendant) not in types)):
|
|
continue
|
|
if strip:
|
|
descendant = descendant.strip()
|
|
if len(descendant) == 0:
|
|
continue
|
|
yield descendant
|
|
|
|
strings = property(_all_strings)
|
|
|
|
@property
|
|
def stripped_strings(self):
|
|
for string in self._all_strings(True):
|
|
yield string
|
|
|
|
def get_text(self, separator=u"", strip=False,
|
|
types=(NavigableString, CData)):
|
|
"""
|
|
Get all child strings, concatenated using the given separator.
|
|
"""
|
|
return separator.join([s for s in self._all_strings(
|
|
strip, types=types)])
|
|
getText = get_text
|
|
text = property(get_text)
|
|
|
|
def decompose(self):
|
|
"""Recursively destroys the contents of this tree."""
|
|
self.extract()
|
|
i = self
|
|
while i is not None:
|
|
next = i.next_element
|
|
i.__dict__.clear()
|
|
i.contents = []
|
|
i = next
|
|
|
|
def clear(self, decompose=False):
|
|
"""
|
|
Extract all children. If decompose is True, decompose instead.
|
|
"""
|
|
if decompose:
|
|
for element in self.contents[:]:
|
|
if isinstance(element, Tag):
|
|
element.decompose()
|
|
else:
|
|
element.extract()
|
|
else:
|
|
for element in self.contents[:]:
|
|
element.extract()
|
|
|
|
def index(self, element):
|
|
"""
|
|
Find the index of a child by identity, not value. Avoids issues with
|
|
tag.contents.index(element) getting the index of equal elements.
|
|
"""
|
|
for i, child in enumerate(self.contents):
|
|
if child is element:
|
|
return i
|
|
raise ValueError("Tag.index: element not in tag")
|
|
|
|
def get(self, key, default=None):
|
|
"""Returns the value of the 'key' attribute for the tag, or
|
|
the value given for 'default' if it doesn't have that
|
|
attribute."""
|
|
return self.attrs.get(key, default)
|
|
|
|
def has_attr(self, key):
|
|
return key in self.attrs
|
|
|
|
def __hash__(self):
|
|
return str(self).__hash__()
|
|
|
|
def __getitem__(self, key):
|
|
"""tag[key] returns the value of the 'key' attribute for the tag,
|
|
and throws an exception if it's not there."""
|
|
return self.attrs[key]
|
|
|
|
def __iter__(self):
|
|
"Iterating over a tag iterates over its contents."
|
|
return iter(self.contents)
|
|
|
|
def __len__(self):
|
|
"The length of a tag is the length of its list of contents."
|
|
return len(self.contents)
|
|
|
|
def __contains__(self, x):
|
|
return x in self.contents
|
|
|
|
def __nonzero__(self):
|
|
"A tag is non-None even if it has no contents."
|
|
return True
|
|
|
|
def __setitem__(self, key, value):
|
|
"""Setting tag[key] sets the value of the 'key' attribute for the
|
|
tag."""
|
|
self.attrs[key] = value
|
|
|
|
def __delitem__(self, key):
|
|
"Deleting tag[key] deletes all 'key' attributes for the tag."
|
|
self.attrs.pop(key, None)
|
|
|
|
def __call__(self, *args, **kwargs):
|
|
"""Calling a tag like a function is the same as calling its
|
|
find_all() method. Eg. tag('a') returns a list of all the A tags
|
|
found within this tag."""
|
|
return self.find_all(*args, **kwargs)
|
|
|
|
def __getattr__(self, tag):
|
|
#print "Getattr %s.%s" % (self.__class__, tag)
|
|
if len(tag) > 3 and tag.endswith('Tag'):
|
|
# BS3: soup.aTag -> "soup.find("a")
|
|
tag_name = tag[:-3]
|
|
warnings.warn(
|
|
'.%sTag is deprecated, use .find("%s") instead.' % (
|
|
tag_name, tag_name))
|
|
return self.find(tag_name)
|
|
# We special case contents to avoid recursion.
|
|
elif not tag.startswith("__") and not tag=="contents":
|
|
return self.find(tag)
|
|
raise AttributeError(
|
|
"'%s' object has no attribute '%s'" % (self.__class__, tag))
|
|
|
|
def __eq__(self, other):
|
|
"""Returns true iff this tag has the same name, the same attributes,
|
|
and the same contents (recursively) as the given tag."""
|
|
if self is other:
|
|
return True
|
|
if (not hasattr(other, 'name') or
|
|
not hasattr(other, 'attrs') or
|
|
not hasattr(other, 'contents') or
|
|
self.name != other.name or
|
|
self.attrs != other.attrs or
|
|
len(self) != len(other)):
|
|
return False
|
|
for i, my_child in enumerate(self.contents):
|
|
if my_child != other.contents[i]:
|
|
return False
|
|
return True
|
|
|
|
def __ne__(self, other):
|
|
"""Returns true iff this tag is not identical to the other tag,
|
|
as defined in __eq__."""
|
|
return not self == other
|
|
|
|
def __repr__(self, encoding=DEFAULT_OUTPUT_ENCODING):
|
|
"""Renders this tag as a string."""
|
|
return self.encode(encoding)
|
|
|
|
def __unicode__(self):
|
|
return self.decode()
|
|
|
|
def __str__(self):
|
|
return self.encode()
|
|
|
|
if PY3K:
|
|
__str__ = __repr__ = __unicode__
|
|
|
|
def encode(self, encoding=DEFAULT_OUTPUT_ENCODING,
|
|
indent_level=None, formatter="minimal",
|
|
errors="xmlcharrefreplace"):
|
|
# Turn the data structure into Unicode, then encode the
|
|
# Unicode.
|
|
u = self.decode(indent_level, encoding, formatter)
|
|
return u.encode(encoding, errors)
|
|
|
|
def _should_pretty_print(self, indent_level):
|
|
"""Should this tag be pretty-printed?"""
|
|
return (
|
|
indent_level is not None and
|
|
(self.name not in HTMLAwareEntitySubstitution.preformatted_tags
|
|
or self._is_xml))
|
|
|
|
def decode(self, indent_level=None,
|
|
eventual_encoding=DEFAULT_OUTPUT_ENCODING,
|
|
formatter="minimal"):
|
|
"""Returns a Unicode representation of this tag and its contents.
|
|
|
|
:param eventual_encoding: The tag is destined to be
|
|
encoded into this encoding. This method is _not_
|
|
responsible for performing that encoding. This information
|
|
is passed in so that it can be substituted in if the
|
|
document contains a <META> tag that mentions the document's
|
|
encoding.
|
|
"""
|
|
|
|
# First off, turn a string formatter into a function. This
|
|
# will stop the lookup from happening over and over again.
|
|
if not callable(formatter):
|
|
formatter = self._formatter_for_name(formatter)
|
|
|
|
attrs = []
|
|
if self.attrs:
|
|
for key, val in sorted(self.attrs.items()):
|
|
if val is None:
|
|
decoded = key
|
|
else:
|
|
if isinstance(val, list) or isinstance(val, tuple):
|
|
val = ' '.join(val)
|
|
elif not isinstance(val, basestring):
|
|
val = unicode(val)
|
|
elif (
|
|
isinstance(val, AttributeValueWithCharsetSubstitution)
|
|
and eventual_encoding is not None):
|
|
val = val.encode(eventual_encoding)
|
|
|
|
text = self.format_string(val, formatter)
|
|
decoded = (
|
|
unicode(key) + '='
|
|
+ EntitySubstitution.quoted_attribute_value(text))
|
|
attrs.append(decoded)
|
|
close = ''
|
|
closeTag = ''
|
|
|
|
prefix = ''
|
|
if self.prefix:
|
|
prefix = self.prefix + ":"
|
|
|
|
if self.is_empty_element:
|
|
close = '/'
|
|
else:
|
|
closeTag = '</%s%s>' % (prefix, self.name)
|
|
|
|
pretty_print = self._should_pretty_print(indent_level)
|
|
space = ''
|
|
indent_space = ''
|
|
if indent_level is not None:
|
|
indent_space = (' ' * (indent_level - 1))
|
|
if pretty_print:
|
|
space = indent_space
|
|
indent_contents = indent_level + 1
|
|
else:
|
|
indent_contents = None
|
|
contents = self.decode_contents(
|
|
indent_contents, eventual_encoding, formatter)
|
|
|
|
if self.hidden:
|
|
# This is the 'document root' object.
|
|
s = contents
|
|
else:
|
|
s = []
|
|
attribute_string = ''
|
|
if attrs:
|
|
attribute_string = ' ' + ' '.join(attrs)
|
|
if indent_level is not None:
|
|
# Even if this particular tag is not pretty-printed,
|
|
# we should indent up to the start of the tag.
|
|
s.append(indent_space)
|
|
s.append('<%s%s%s%s>' % (
|
|
prefix, self.name, attribute_string, close))
|
|
if pretty_print:
|
|
s.append("\n")
|
|
s.append(contents)
|
|
if pretty_print and contents and contents[-1] != "\n":
|
|
s.append("\n")
|
|
if pretty_print and closeTag:
|
|
s.append(space)
|
|
s.append(closeTag)
|
|
if indent_level is not None and closeTag and self.next_sibling:
|
|
# Even if this particular tag is not pretty-printed,
|
|
# we're now done with the tag, and we should add a
|
|
# newline if appropriate.
|
|
s.append("\n")
|
|
s = ''.join(s)
|
|
return s
|
|
|
|
def prettify(self, encoding=None, formatter="minimal"):
|
|
if encoding is None:
|
|
return self.decode(True, formatter=formatter)
|
|
else:
|
|
return self.encode(encoding, True, formatter=formatter)
|
|
|
|
def decode_contents(self, indent_level=None,
|
|
eventual_encoding=DEFAULT_OUTPUT_ENCODING,
|
|
formatter="minimal"):
|
|
"""Renders the contents of this tag as a Unicode string.
|
|
|
|
:param eventual_encoding: The tag is destined to be
|
|
encoded into this encoding. This method is _not_
|
|
responsible for performing that encoding. This information
|
|
is passed in so that it can be substituted in if the
|
|
document contains a <META> tag that mentions the document's
|
|
encoding.
|
|
"""
|
|
# First off, turn a string formatter into a function. This
|
|
# will stop the lookup from happening over and over again.
|
|
if not callable(formatter):
|
|
formatter = self._formatter_for_name(formatter)
|
|
|
|
pretty_print = (indent_level is not None)
|
|
s = []
|
|
for c in self:
|
|
text = None
|
|
if isinstance(c, NavigableString):
|
|
text = c.output_ready(formatter)
|
|
elif isinstance(c, Tag):
|
|
s.append(c.decode(indent_level, eventual_encoding,
|
|
formatter))
|
|
if text and indent_level and not self.name == 'pre':
|
|
text = text.strip()
|
|
if text:
|
|
if pretty_print and not self.name == 'pre':
|
|
s.append(" " * (indent_level - 1))
|
|
s.append(text)
|
|
if pretty_print and not self.name == 'pre':
|
|
s.append("\n")
|
|
return ''.join(s)
|
|
|
|
def encode_contents(
|
|
self, indent_level=None, encoding=DEFAULT_OUTPUT_ENCODING,
|
|
formatter="minimal"):
|
|
"""Renders the contents of this tag as a bytestring."""
|
|
contents = self.decode_contents(indent_level, encoding, formatter)
|
|
return contents.encode(encoding)
|
|
|
|
# Old method for BS3 compatibility
|
|
def renderContents(self, encoding=DEFAULT_OUTPUT_ENCODING,
|
|
prettyPrint=False, indentLevel=0):
|
|
if not prettyPrint:
|
|
indentLevel = None
|
|
return self.encode_contents(
|
|
indent_level=indentLevel, encoding=encoding)
|
|
|
|
#Soup methods
|
|
|
|
def find(self, name=None, attrs={}, recursive=True, text=None,
|
|
**kwargs):
|
|
"""Return only the first child of this Tag matching the given
|
|
criteria."""
|
|
r = None
|
|
l = self.find_all(name, attrs, recursive, text, 1, **kwargs)
|
|
if l:
|
|
r = l[0]
|
|
return r
|
|
findChild = find
|
|
|
|
def find_all(self, name=None, attrs={}, recursive=True, text=None,
|
|
limit=None, **kwargs):
|
|
"""Extracts a list of Tag objects that match the given
|
|
criteria. You can specify the name of the Tag and any
|
|
attributes you want the Tag to have.
|
|
|
|
The value of a key-value pair in the 'attrs' map can be a
|
|
string, a list of strings, a regular expression object, or a
|
|
callable that takes a string and returns whether or not the
|
|
string matches for some custom definition of 'matches'. The
|
|
same is true of the tag name."""
|
|
|
|
generator = self.descendants
|
|
if not recursive:
|
|
generator = self.children
|
|
return self._find_all(name, attrs, text, limit, generator, **kwargs)
|
|
findAll = find_all # BS3
|
|
findChildren = find_all # BS2
|
|
|
|
#Generator methods
|
|
@property
|
|
def children(self):
|
|
# return iter() to make the purpose of the method clear
|
|
return iter(self.contents) # XXX This seems to be untested.
|
|
|
|
@property
|
|
def descendants(self):
|
|
if not len(self.contents):
|
|
return
|
|
stopNode = self._last_descendant().next_element
|
|
current = self.contents[0]
|
|
while current is not stopNode:
|
|
yield current
|
|
current = current.next_element
|
|
|
|
# CSS selector code
|
|
|
|
_selector_combinators = ['>', '+', '~']
|
|
_select_debug = False
|
|
def select(self, selector, _candidate_generator=None):
|
|
"""Perform a CSS selection operation on the current element."""
|
|
tokens = selector.split()
|
|
current_context = [self]
|
|
|
|
if tokens[-1] in self._selector_combinators:
|
|
raise ValueError(
|
|
'Final combinator "%s" is missing an argument.' % tokens[-1])
|
|
if self._select_debug:
|
|
print 'Running CSS selector "%s"' % selector
|
|
for index, token in enumerate(tokens):
|
|
if self._select_debug:
|
|
print ' Considering token "%s"' % token
|
|
recursive_candidate_generator = None
|
|
tag_name = None
|
|
if tokens[index-1] in self._selector_combinators:
|
|
# This token was consumed by the previous combinator. Skip it.
|
|
if self._select_debug:
|
|
print ' Token was consumed by the previous combinator.'
|
|
continue
|
|
# Each operation corresponds to a checker function, a rule
|
|
# for determining whether a candidate matches the
|
|
# selector. Candidates are generated by the active
|
|
# iterator.
|
|
checker = None
|
|
|
|
m = self.attribselect_re.match(token)
|
|
if m is not None:
|
|
# Attribute selector
|
|
tag_name, attribute, operator, value = m.groups()
|
|
checker = self._attribute_checker(operator, attribute, value)
|
|
|
|
elif '#' in token:
|
|
# ID selector
|
|
tag_name, tag_id = token.split('#', 1)
|
|
def id_matches(tag):
|
|
return tag.get('id', None) == tag_id
|
|
checker = id_matches
|
|
|
|
elif '.' in token:
|
|
# Class selector
|
|
tag_name, klass = token.split('.', 1)
|
|
classes = set(klass.split('.'))
|
|
def classes_match(candidate):
|
|
return classes.issubset(candidate.get('class', []))
|
|
checker = classes_match
|
|
|
|
elif ':' in token:
|
|
# Pseudo-class
|
|
tag_name, pseudo = token.split(':', 1)
|
|
if tag_name == '':
|
|
raise ValueError(
|
|
"A pseudo-class must be prefixed with a tag name.")
|
|
pseudo_attributes = re.match('([a-zA-Z\d-]+)\(([a-zA-Z\d]+)\)', pseudo)
|
|
found = []
|
|
if pseudo_attributes is not None:
|
|
pseudo_type, pseudo_value = pseudo_attributes.groups()
|
|
if pseudo_type == 'nth-of-type':
|
|
try:
|
|
pseudo_value = int(pseudo_value)
|
|
except:
|
|
raise NotImplementedError(
|
|
'Only numeric values are currently supported for the nth-of-type pseudo-class.')
|
|
if pseudo_value < 1:
|
|
raise ValueError(
|
|
'nth-of-type pseudo-class value must be at least 1.')
|
|
class Counter(object):
|
|
def __init__(self, destination):
|
|
self.count = 0
|
|
self.destination = destination
|
|
|
|
def nth_child_of_type(self, tag):
|
|
self.count += 1
|
|
if self.count == self.destination:
|
|
return True
|
|
if self.count > self.destination:
|
|
# Stop the generator that's sending us
|
|
# these things.
|
|
raise StopIteration()
|
|
return False
|
|
checker = Counter(pseudo_value).nth_child_of_type
|
|
else:
|
|
raise NotImplementedError(
|
|
'Only the following pseudo-classes are implemented: nth-of-type.')
|
|
|
|
elif token == '*':
|
|
# Star selector -- matches everything
|
|
pass
|
|
elif token == '>':
|
|
# Run the next token as a CSS selector against the
|
|
# direct children of each tag in the current context.
|
|
recursive_candidate_generator = lambda tag: tag.children
|
|
elif token == '~':
|
|
# Run the next token as a CSS selector against the
|
|
# siblings of each tag in the current context.
|
|
recursive_candidate_generator = lambda tag: tag.next_siblings
|
|
elif token == '+':
|
|
# For each tag in the current context, run the next
|
|
# token as a CSS selector against the tag's next
|
|
# sibling that's a tag.
|
|
def next_tag_sibling(tag):
|
|
yield tag.find_next_sibling(True)
|
|
recursive_candidate_generator = next_tag_sibling
|
|
|
|
elif self.tag_name_re.match(token):
|
|
# Just a tag name.
|
|
tag_name = token
|
|
else:
|
|
raise ValueError(
|
|
'Unsupported or invalid CSS selector: "%s"' % token)
|
|
|
|
if recursive_candidate_generator:
|
|
# This happens when the selector looks like "> foo".
|
|
#
|
|
# The generator calls select() recursively on every
|
|
# member of the current context, passing in a different
|
|
# candidate generator and a different selector.
|
|
#
|
|
# In the case of "> foo", the candidate generator is
|
|
# one that yields a tag's direct children (">"), and
|
|
# the selector is "foo".
|
|
next_token = tokens[index+1]
|
|
def recursive_select(tag):
|
|
if self._select_debug:
|
|
print ' Calling select("%s") recursively on %s %s' % (next_token, tag.name, tag.attrs)
|
|
print '-' * 40
|
|
for i in tag.select(next_token, recursive_candidate_generator):
|
|
if self._select_debug:
|
|
print '(Recursive select picked up candidate %s %s)' % (i.name, i.attrs)
|
|
yield i
|
|
if self._select_debug:
|
|
print '-' * 40
|
|
_use_candidate_generator = recursive_select
|
|
elif _candidate_generator is None:
|
|
# By default, a tag's candidates are all of its
|
|
# children. If tag_name is defined, only yield tags
|
|
# with that name.
|
|
if self._select_debug:
|
|
if tag_name:
|
|
check = "[any]"
|
|
else:
|
|
check = tag_name
|
|
print ' Default candidate generator, tag name="%s"' % check
|
|
if self._select_debug:
|
|
# This is redundant with later code, but it stops
|
|
# a bunch of bogus tags from cluttering up the
|
|
# debug log.
|
|
def default_candidate_generator(tag):
|
|
for child in tag.descendants:
|
|
if not isinstance(child, Tag):
|
|
continue
|
|
if tag_name and not child.name == tag_name:
|
|
continue
|
|
yield child
|
|
_use_candidate_generator = default_candidate_generator
|
|
else:
|
|
_use_candidate_generator = lambda tag: tag.descendants
|
|
else:
|
|
_use_candidate_generator = _candidate_generator
|
|
|
|
new_context = []
|
|
new_context_ids = set([])
|
|
for tag in current_context:
|
|
if self._select_debug:
|
|
print " Running candidate generator on %s %s" % (
|
|
tag.name, repr(tag.attrs))
|
|
for candidate in _use_candidate_generator(tag):
|
|
if not isinstance(candidate, Tag):
|
|
continue
|
|
if tag_name and candidate.name != tag_name:
|
|
continue
|
|
if checker is not None:
|
|
try:
|
|
result = checker(candidate)
|
|
except StopIteration:
|
|
# The checker has decided we should no longer
|
|
# run the generator.
|
|
break
|
|
if checker is None or result:
|
|
if self._select_debug:
|
|
print " SUCCESS %s %s" % (candidate.name, repr(candidate.attrs))
|
|
if id(candidate) not in new_context_ids:
|
|
# If a tag matches a selector more than once,
|
|
# don't include it in the context more than once.
|
|
new_context.append(candidate)
|
|
new_context_ids.add(id(candidate))
|
|
elif self._select_debug:
|
|
print " FAILURE %s %s" % (candidate.name, repr(candidate.attrs))
|
|
|
|
current_context = new_context
|
|
|
|
if self._select_debug:
|
|
print "Final verdict:"
|
|
for i in current_context:
|
|
print " %s %s" % (i.name, i.attrs)
|
|
return current_context
|
|
|
|
# Old names for backwards compatibility
|
|
def childGenerator(self):
|
|
return self.children
|
|
|
|
def recursiveChildGenerator(self):
|
|
return self.descendants
|
|
|
|
def has_key(self, key):
|
|
"""This was kind of misleading because has_key() (attributes)
|
|
was different from __in__ (contents). has_key() is gone in
|
|
Python 3, anyway."""
|
|
warnings.warn('has_key is deprecated. Use has_attr("%s") instead.' % (
|
|
key))
|
|
return self.has_attr(key)
|
|
|
|
# Next, a couple classes to represent queries and their results.
|
|
class SoupStrainer(object):
|
|
"""Encapsulates a number of ways of matching a markup element (tag or
|
|
text)."""
|
|
|
|
def __init__(self, name=None, attrs={}, text=None, **kwargs):
|
|
self.name = self._normalize_search_value(name)
|
|
if not isinstance(attrs, dict):
|
|
# Treat a non-dict value for attrs as a search for the 'class'
|
|
# attribute.
|
|
kwargs['class'] = attrs
|
|
attrs = None
|
|
|
|
if 'class_' in kwargs:
|
|
# Treat class_="foo" as a search for the 'class'
|
|
# attribute, overriding any non-dict value for attrs.
|
|
kwargs['class'] = kwargs['class_']
|
|
del kwargs['class_']
|
|
|
|
if kwargs:
|
|
if attrs:
|
|
attrs = attrs.copy()
|
|
attrs.update(kwargs)
|
|
else:
|
|
attrs = kwargs
|
|
normalized_attrs = {}
|
|
for key, value in attrs.items():
|
|
normalized_attrs[key] = self._normalize_search_value(value)
|
|
|
|
self.attrs = normalized_attrs
|
|
self.text = self._normalize_search_value(text)
|
|
|
|
def _normalize_search_value(self, value):
|
|
# Leave it alone if it's a Unicode string, a callable, a
|
|
# regular expression, a boolean, or None.
|
|
if (isinstance(value, unicode) or callable(value) or hasattr(value, 'match')
|
|
or isinstance(value, bool) or value is None):
|
|
return value
|
|
|
|
# If it's a bytestring, convert it to Unicode, treating it as UTF-8.
|
|
if isinstance(value, bytes):
|
|
return value.decode("utf8")
|
|
|
|
# If it's listlike, convert it into a list of strings.
|
|
if hasattr(value, '__iter__'):
|
|
new_value = []
|
|
for v in value:
|
|
if (hasattr(v, '__iter__') and not isinstance(v, bytes)
|
|
and not isinstance(v, unicode)):
|
|
# This is almost certainly the user's mistake. In the
|
|
# interests of avoiding infinite loops, we'll let
|
|
# it through as-is rather than doing a recursive call.
|
|
new_value.append(v)
|
|
else:
|
|
new_value.append(self._normalize_search_value(v))
|
|
return new_value
|
|
|
|
# Otherwise, convert it into a Unicode string.
|
|
# The unicode(str()) thing is so this will do the same thing on Python 2
|
|
# and Python 3.
|
|
return unicode(str(value))
|
|
|
|
def __str__(self):
|
|
if self.text:
|
|
return self.text
|
|
else:
|
|
return "%s|%s" % (self.name, self.attrs)
|
|
|
|
def search_tag(self, markup_name=None, markup_attrs={}):
|
|
found = None
|
|
markup = None
|
|
if isinstance(markup_name, Tag):
|
|
markup = markup_name
|
|
markup_attrs = markup
|
|
call_function_with_tag_data = (
|
|
isinstance(self.name, collections.Callable)
|
|
and not isinstance(markup_name, Tag))
|
|
|
|
if ((not self.name)
|
|
or call_function_with_tag_data
|
|
or (markup and self._matches(markup, self.name))
|
|
or (not markup and self._matches(markup_name, self.name))):
|
|
if call_function_with_tag_data:
|
|
match = self.name(markup_name, markup_attrs)
|
|
else:
|
|
match = True
|
|
markup_attr_map = None
|
|
for attr, match_against in list(self.attrs.items()):
|
|
if not markup_attr_map:
|
|
if hasattr(markup_attrs, 'get'):
|
|
markup_attr_map = markup_attrs
|
|
else:
|
|
markup_attr_map = {}
|
|
for k, v in markup_attrs:
|
|
markup_attr_map[k] = v
|
|
attr_value = markup_attr_map.get(attr)
|
|
if not self._matches(attr_value, match_against):
|
|
match = False
|
|
break
|
|
if match:
|
|
if markup:
|
|
found = markup
|
|
else:
|
|
found = markup_name
|
|
if found and self.text and not self._matches(found.string, self.text):
|
|
found = None
|
|
return found
|
|
searchTag = search_tag
|
|
|
|
def search(self, markup):
|
|
# print 'looking for %s in %s' % (self, markup)
|
|
found = None
|
|
# If given a list of items, scan it for a text element that
|
|
# matches.
|
|
if hasattr(markup, '__iter__') and not isinstance(markup, (Tag, basestring)):
|
|
for element in markup:
|
|
if isinstance(element, NavigableString) \
|
|
and self.search(element):
|
|
found = element
|
|
break
|
|
# If it's a Tag, make sure its name or attributes match.
|
|
# Don't bother with Tags if we're searching for text.
|
|
elif isinstance(markup, Tag):
|
|
if not self.text or self.name or self.attrs:
|
|
found = self.search_tag(markup)
|
|
# If it's text, make sure the text matches.
|
|
elif isinstance(markup, NavigableString) or \
|
|
isinstance(markup, basestring):
|
|
if not self.name and not self.attrs and self._matches(markup, self.text):
|
|
found = markup
|
|
else:
|
|
raise Exception(
|
|
"I don't know how to match against a %s" % markup.__class__)
|
|
return found
|
|
|
|
def _matches(self, markup, match_against):
|
|
# print u"Matching %s against %s" % (markup, match_against)
|
|
result = False
|
|
if isinstance(markup, list) or isinstance(markup, tuple):
|
|
# This should only happen when searching a multi-valued attribute
|
|
# like 'class'.
|
|
if (isinstance(match_against, unicode)
|
|
and ' ' in match_against):
|
|
# A bit of a special case. If they try to match "foo
|
|
# bar" on a multivalue attribute's value, only accept
|
|
# the literal value "foo bar"
|
|
#
|
|
# XXX This is going to be pretty slow because we keep
|
|
# splitting match_against. But it shouldn't come up
|
|
# too often.
|
|
return (whitespace_re.split(match_against) == markup)
|
|
else:
|
|
for item in markup:
|
|
if self._matches(item, match_against):
|
|
return True
|
|
return False
|
|
|
|
if match_against is True:
|
|
# True matches any non-None value.
|
|
return markup is not None
|
|
|
|
if isinstance(match_against, collections.Callable):
|
|
return match_against(markup)
|
|
|
|
# Custom callables take the tag as an argument, but all
|
|
# other ways of matching match the tag name as a string.
|
|
if isinstance(markup, Tag):
|
|
markup = markup.name
|
|
|
|
# Ensure that `markup` is either a Unicode string, or None.
|
|
markup = self._normalize_search_value(markup)
|
|
|
|
if markup is None:
|
|
# None matches None, False, an empty string, an empty list, and so on.
|
|
return not match_against
|
|
|
|
if isinstance(match_against, unicode):
|
|
# Exact string match
|
|
return markup == match_against
|
|
|
|
if hasattr(match_against, 'match'):
|
|
# Regexp match
|
|
return match_against.search(markup)
|
|
|
|
if hasattr(match_against, '__iter__'):
|
|
# The markup must be an exact match against something
|
|
# in the iterable.
|
|
return markup in match_against
|
|
|
|
|
|
class ResultSet(list):
|
|
"""A ResultSet is just a list that keeps track of the SoupStrainer
|
|
that created it."""
|
|
def __init__(self, source, result=()):
|
|
super(ResultSet, self).__init__(result)
|
|
self.source = source
|