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73 Commits

Author SHA1 Message Date
Bastian Hofmann
c82051c3e1 Add HTML.Noopener to add a noopener rel to every external link 
This has performance benefits https://jakearchibald.com/2016/performance-benefits-of-rel-noopener/ but most importantly also security benefits https://mathiasbynens.github.io/rel-noopener/

Adresses https://github.com/ezyang/htmlpurifier/issues/96
 2017-02-03 16:54:51 -08:00
Edward Z. Yang
59463c5c39 Allow %URI.DefaultScheme to be null. 
Fixes #103.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2016-10-27 17:30:44 -07:00
Edward Z. Yang
d1c5d75027 Fix #73 with Attr.ID.HTML5 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2016-07-16 05:52:45 -07:00
Edward Z. Yang
0166c3728b Stop trying to chmod if SerializerPermissions is null, fixes #71 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2016-07-01 16:04:11 -04:00
Cameron Ball
1675fc7caf Add %HTML.TargetNoreferrer, which adds rel="noreferrer" when target attribute is set 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2016-06-30 21:53:43 -04:00
Wes Cossick
cc35c8eb8c tel protocol support. 2016-06-30 21:19:49 -04:00
Edward Z. Yang
913ac6955b CSS.AllowDuplicates for duplicate properties. 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2015-12-20 11:53:54 -08:00
Edward Z. Yang
39d3df1fd7 Add AutoFormat.RemoveEmpty.Predicate, fixes #35. 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2014-08-31 12:12:17 +01:00
Edward Z. Yang
80ebd4322e Typo in docs, thanks Soleil Golden for reporting. 
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
 2014-02-04 12:17:24 -08:00
Edward Z. Yang
0767bbc12d Rewrite FixNesting implementation to be tree-based. 
This mega-patch rips out the FixNesting implementation and the related
ChildDef components.  The primary algorithmic change is to convert from
use of tokens to tree nodes, which are far more amenable to the style
of processing that FixNesting uses.  Additionally, FixNesting has been
changed to go bottom-up rather than top-down, in order to avoid needing
to implement backtracking.

This patch simplifies a good deal of the relevant logic, since we no
longer need to continually recalculate the nesting structure when
processing things.  However, the conversion to the alternate format
incurs some overhead, so for small inputs these changes are not a win.
One possibility to greatly reduce the constant factors here is to switch
to entirely using libxml's representation, and never serializing tokens;
this would require one to rewrite injectors, however.

The iterative post-order traversal in FixNesting is a bit subtle, but
we have essentially reified the stack and continuations.

We've removed support for %Core.EscapeInvalidChildren.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-10-20 22:37:01 -07:00
Edward Z. Yang
cf44f399f8 Properly use HMAC for secure munging. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-09-13 21:16:50 -07:00
Edward Z. Yang
53c2907706 New directive %Core.AllowHostnameUnderscore 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-07-26 21:33:39 -07:00
Edward Z. Yang
631021733b Add %Core.DisableExcludes directive 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2013-02-17 15:47:38 -08:00
Edward Z. Yang
2189a9430f Support for safe external scripts via explicit whitelist. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-04-27 17:44:49 -04:00
Edward Z. Yang
974fe3f25e Optional support for IDNAs with PEAR Net_IDNA2 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2012-01-06 05:28:00 -08:00
Edward Z. Yang
5c9b5130c8 Bump minor version number to 4.4.0. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 21:55:14 +08:00
Bradley M. Froehle
4164b2eb2b Implement Iframe module, and provide %HTML.SafeIframe and %URI.SafeIframeRegexp for untrusted usage. 
The purpose of this addition is twofold. In trusted mode, iframes are
now unconditionally allowed.

However, many online video providers (YouTube, Vimeo) and other web
applications (Google Maps, Google Calendar, etc) provide embed code in
iframe format, which is useful functionality in untrusted mode.
You can specify iframes as trusted elements with %HTML.SafeIframe;
however, you need to additionally specify a whitelist mechanism such as
%URI.SafeIframeRegexp to say what iframe embeds are OK (by default
everything is rejected).

Note: As iframes are invalid in strict doctypes, you will not be able to
use them there.

We also added an always_load parameter to URIFilters in order to support
the strange nature of the SafeIframe URIFilter (it always needs to be
loaded, due to the inability of accessing the %HTML.SafeIframe directive
to see if it's needed!)  We expect this URIFilter can expand in the future
to offer more complex validation mechanisms.

Signed-off-by: Bradley M. Froehle <brad.froehle@gmail.com>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 21:50:53 +08:00
Edward Z. Yang
6b643ede02 Implement %HTML.AllowedComments and %HTML.AllowedCommentsRegexp 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 15:34:42 +08:00
Edward Z. Yang
8d572993b4 Implement %HTML.TargetBlank 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-12-26 08:36:00 +08:00
Edward Z. Yang
f51a6f7de9 Color keywords now case-insensitive. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-04-10 12:45:02 +01:00
Edward Z. Yang
0dd9e4faf4 Fix Internet Explorer innerHTML bug. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-27 11:50:52 +01:00
Edward Z. Yang
94ed3b1231 Implement CSS.AllowedFonts. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-03-24 22:54:39 +00:00
Edward Z. Yang
77982bd61d Bump version number for Cache.SerializerPermissions. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2011-01-14 00:40:39 +00:00
Petr Skoda
78c4e62245 Add new Cache.SerializerPermissions option. 2011-01-13 22:57:40 +00:00
Edward Z. Yang
f3d050c517 Fix two bugs with caching of customized raw definitions. 
The first bug is that we will repeatedly write out the result
of a customized raw definition to the filesystem, even when a cache
entry already exists.

The second bug is that caching these definitions doesn't actually
work (the cache entry is written but never used.)  A new API
for retrieving raw definitions permits the user to take advantage
of caching.

Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-12-30 23:51:53 +00:00
Edward Z. Yang
cfc4ee1faf Add initial implementation of CSS.Trusted. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-11-12 18:45:03 +00:00
Edward Z. Yang
8c80349f9d Implement HTML.Nofollow for external links. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-28 12:01:57 -04:00
Edward Z. Yang
86990a21f1 Rename newline normalization directive to something better. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-15 02:50:39 -04:00
Tomasz Muras
9573f0933d Make newline normalization optional. 2010-09-14 23:49:28 -04:00
Edward Z. Yang
632bf2bbd4 Shift to 4.2.0 release cycle. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-14 23:38:51 -04:00
Edward Z. Yang
ec86598446 Add support for file:// URI scheme. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-09 00:01:26 -04:00
Edward Z. Yang
7c91104532 Implement HTML.FlashAllowFullScreen. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-08 23:39:20 -04:00
Edward Z. Yang
eac628f490 Add %CSS.ForbiddenProperties directive. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-04 02:59:03 -04:00
Edward Z. Yang
479d793562 Reword documentation to be clearer, and give warning on common user error. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-09-04 01:31:20 -04:00
Edward Z. Yang
c04a441b3e Actually make URI.DisableResources do something. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-06-30 05:59:17 -07:00
Edward Z. Yang
1bed8b6d5f Added %Core.RemoveProcessingInstructions. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-06-20 18:26:44 -07:00
Edward Z. Yang
0229458f8f Implement Internet Explorer compatibility code for embedded content. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-08 01:56:40 -05:00
Edward Z. Yang
97125ed18b Implement data URI scheme. 
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-07 21:45:39 -05:00
Paul Stone
9a9036c689 Implement auto-formatter that removes empty span tags. 
Signed-off-by: Paul Stone <patches@pdjs.co.uk>
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
 2010-03-07 18:59:33 -05:00
Edward Z. Yang
84abae08f5 Relax allowed values of class for certain doctypes, see %Attr.ClassUseCDATA 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-26 01:07:40 -04:00
Edward Z. Yang
baf053b016 Implement %Attr.AllowedClasses and %Attr.ForbiddenClasses. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 22:08:45 -04:00
Edward Z. Yang
bfbe29d5a1 Rename ExtractStyleBlocks configuration parameters. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 21:54:39 -04:00
Edward Z. Yang
e194b8efc6 Rename AutoFormatParam.PurifierLinkifyDocURL. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-05-25 21:51:08 -04:00
Edward Z. Yang
e3c2063f69 Implement %AutoFormat.RemoveEmpty.RemoveNbsp, by popular demand. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-04-09 00:53:19 -04:00
Edward Z. Yang
398a02039e Implement %HTML.Attr.Name.UseCDATA which relaxes name validation rules. 
Sponsored-by: Ian Cook <thinkspill@gmail.com>
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-03-20 19:34:38 -04:00
Edward Z. Yang
b107eec452 Revamp configuration backend. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2009-02-21 03:00:33 -05:00
Edward Z. Yang
12b811d749 Add vim modelines to all files. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2008-12-06 04:24:59 -05:00
Edward Z. Yang
2c955af135 Remove trailing whitespace. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2008-12-06 02:28:20 -05:00
Edward Z. Yang
c5d4b1ec93 Fix missing version number in config directive, and add TODO item. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2008-11-05 02:56:13 -05:00
Edward Z. Yang
0e6e2c4edf Bump descriptions to 3.2.0. 
Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
 2008-10-31 12:25:43 -04:00