#1 Modified kses with 'colon' and 'lone <' bugs fixed

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Slightly modified version of Kses 0.2.2 with improved speed, fixed bugs like the colon bug, and extra features. This version is being used a forthcoming release of LabWiki software (bioinformatics.org/phplabware).

Changes:

* File-size reduced ~50% to 9 kb - smaller variable names; small functions instead coded inline

* Expanded allowed protocols so attributes in style, like "border: 1px", are possible; only safe values added (see feedvalidator.org/docs/warning/DangerousStyleAttr.html)

* Option to replace unallowed tags (and contents) with entitified values, instead of being removed altogether

* Lowercase entities of type &#Xnn; for XML compliance

Testing:

* File test.php accompanies

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Also:

* Attributes declared only once in output
* Lowercased tag and attribute names in output
* Valueless attributes get values for XHTML compliance
* Tags like '<img src="x"/>' without space before closing '/>' are corrected and not made empty
File Added: kses_labwiki_12Jul07.zip

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File Added: kses_labwiki_12Jul07.zip

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Labwiki-modified kses 0.2.2, of 16 July 2007: Further kses modification adds better checking of entities. Following go unfiltered, others are made non-entities (like '&this;' to '&amp;this;')

* XHTML-specific named entities (like '&tilde;')
* numerical entities in decimal or hexadecimal form valued < 65535, but not in character ranges (hex) 7F-84, 86-9F, or FDD0-FDDF
File Added: kses_labwiki_16Jul07.zip

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Labwiki-modified kses 0.2.2, of 16 July 2007

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Labwiki-modified kses 0.2.2, v1.1 of 14 August 2007, adds these extra features:

* option to balance tags for HTML well-formedness
* now there is no need to modify code that called the older kses() function as the new kses() will correctly identify the arguments passed to it

File Added: kses_labwiki_1.1_14Aug07.zip

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File Added: kses_labwiki_1.1_14Aug07.zip

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Labwiki-modified kses 0.2.2, v1.1 of 14 Aug 2007

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File Added: kses_labwiki_1.1_14Aug07.zip

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15 August 2007 release:

* optional support to allow CDATA sections and comments
File Added: kses_labwiki_1.1_15Aug07.zip

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Labwiki-modified kses 0.2.2, v1.1 of 15 Aug 2007

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16 August 2007 release:

* optional support for unique ID attribute values, with option to remove or prefix them
File Added: kses_labwiki_1.1_16Aug07.zip

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Labwiki-modified kses 0.2.2, v1.1 of 16 Aug 2007

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File Added: test.htm

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Minor fixes/improvements
File Added: kses_labwiki_1.1_17Aug07.zip

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Labwiki-modified kses 0.2.2, v1.1 of 17 Aug 2007

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File Added: kses_labwiki_1.1_17Aug07.zip

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File Added: test.htm

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Web page with test results - comparison with original Kses

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File Added: test.htm

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File Added: kses_labwiki_1.1_18Aug07.zip

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Labwiki-modified kses 0.2.2, v1.1 of 18 Aug 2007

[Anton Vlasov]

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Thanks for your work =)

[Arda]

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thanks so much for the work :)

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Further releases of this modified kses will be available as 'htmLawed' from http://bioinformatics.org/phplabware/internal_utilities/htmLawed 10/30/07 onwards.

htmLawed will remain 'kses-compatible' and will have these features:

Key: * security feature, ^ standard compliance, ~ requires setting right options, ` different from Kses)

* HTML in input may be highly ill-written; htmLawed will make it secure and standard-compliant
* output can be used in HTML 4, XHTML 1.0, XHTML 1.1, or even generic XML documents ^~`

* options to restrict elements ^~`
* proper closure of empty elements like 'img' ^`
* deprecated elements like 'u' can be transformed ^~`
* HTML comments and 'CDATA' sections can be permitted ^~`
* 'script' elements can be permitted ~

* options to restrict attributes ^~`
* removal of invalid attributes ^`
* element and attribute names are lower-cased ^
* provides required attributes, like 'action' for 'form', when missing ^`
* deprecated attributes can be transformed ^~`
* attributes declared only once ^`

* options to *restrict attribute values* ^~`
* a value is declared for `empty` (`minimized`) attributes like 'checked' ^
* attributes with potentially dangerous values (that can cause buffer overflows and denial of service attacks) can be removed after checking their lengths or values *~
* unique 'id' attribute values can be ensured ^~`
* attribute values are enclosed in double-quotes ^
* standard attribute values are lower-cased (like 'type="password"') ^`

* attribute-specific URL protocol/scheme restriction *~`
* dynamic expressions in 'style' values can be disabled *~`

* non-numeric, named character entities not in the HTML standard are neutralized ^`
* hexadecimal numeric entities may be made decimal ones, or vice versa ^~`
* HTML-specific named character entities can be converted to numeric ones for generic XML use ^~`

* removes null characters from input *
* neutralizes potentially dangerous proprietary Netscape *Javascript entities* *
* removes soft-hyphen character (code-point '173' or '#xad') in attribute values -- a vulnerability in some versions of the Opera browser *

* invalid characters not allowed in HTML or XML are removed ^`
* characters from Microsoft applications like 'Word' that are discouraged in HTML or XML can be replaced with good ones ^~`
* entities for characters not allowed or discouraged in HTML or XML are neutralized ^`
* appropriately neutralizes '<', '&', '"', and '>' characters ^*`

* understands improperly spaced tag content (like, spread over more than a line) and properly spaces them `
* can balance tags for well-formedness ^~`
* can permit only validly nested tags ^~`

* fast, non-OOP code of ~45 kb incurring peak basal memory usage of ~0.5 MB
* *compatible with pre-exisiting code using 'Kses'

* optional anti-spam measures such as addition of 'rel="nofollow"' and link-disabling ~`
* optionally makes relative URLs absolute, and vice versa ~`

* independent of character encoding of input and does not affect it
* won't change formatting of element content by affecting line-breaks, spaces or tabs outside tags but normalizes white spaces in tag content

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