lxml.html.clean.Cleaner

Class Cleaner

object --+ | Cleaner

Instances cleans the document of each of the possible offending elements. The cleaning is controlled by attributes; you can override attributes in a subclass, or set them in the constructor.

scripts:

Removes any <script> tags.

javascript:

Removes any Javascript, like an onclick attribute.

comments:

Removes any comments.

style:

Removes any style tags or attributes.

links:

Removes any <link> tags

meta:

Removes any <meta> tags

page_structure:

Structural parts of a page: <head>, <html>, <title>.

processing_instructions:

Removes any processing instructions.

embedded:

Removes any embedded objects (flash, iframes)

frames:

Removes any frame-related tags

forms:

Removes any form tags

annoying_tags:

Tags that aren't wrong, but are annoying. <blink> and <marque>

remove_tags:

A list of tags to remove.

allow_tags:

A list of tags to include (default include all).

remove_unknown_tags:

Remove any tags that aren't standard parts of HTML.

safe_attrs_only:

If true, only include 'safe' attributes (specifically the list from feedparser).

add_nofollow:

If true, then any <a> tags will have rel="nofollow" added to them.

host_whitelist:

A list or set of hosts that you can use for embedded content (for content like <object>, <link rel="stylesheet">, etc). You can also implement/override the method allow_embedded_url(el, url) or allow_element(el) to implement more complex rules for what can be embedded. Anything that passes this test will be shown, regardless of the value of (for instance) embedded.

Note that this parameter might not work as intended if you do not make the links absolute before doing the cleaning.

whitelist_tags:

A set of tags that can be included with host_whitelist. The default is iframe and embed; you may wish to include other tags like script, or you may want to implement allow_embedded_url for more control. Set to None to include all tags.

This modifies the document in place.

Instance Methods

__init__(self, **kw)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature

source code

__call__(self, doc)
Cleans the document.

source code

allow_follow(self, anchor)
Override to suppress rel="nofollow" on some anchors.

source code

allow_element(self, el)

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allow_embedded_url(self, el, url)

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kill_conditional_comments(self, doc)
IE conditional comments basically embed HTML that the parser doesn't normally see.

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clean_html(self, html)

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Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Class Variables

scripts = True

javascript = True

comments = True

style = False

links = True

meta = True

page_structure = True

processing_instructions = True

embedded = True

frames = True

forms = True

annoying_tags = True

remove_tags = None

allow_tags = None

remove_unknown_tags = True

safe_attrs_only = True

add_nofollow = False

host_whitelist = ()

whitelist_tags = set(['embed', 'iframe'])

Properties

Inherited from object: __class__

Method Details

init(self, **kw)
(Constructor)

source code

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Overrides: object.__init__: (inherited documentation)

kill_conditional_comments(self, doc)

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IE conditional comments basically embed HTML that the parser doesn't normally see. We can't allow anything like that, so we'll kill any comments that could be conditional.

Class Cleaner

__init__(self, **kw) (Constructor)

kill_conditional_comments(self, doc)

init(self, **kw)
(Constructor)