W3C home > Mailing lists > Public > www-validator@w3.org > February 2011

Backslashes in URLs

From: Paul Gilmartin <PaulGBoulder@aim.com>
Date: Thu, 17 Feb 2011 00:56:06 -0700
Message-Id: <56DEB60D-6B0C-4A6A-A1EC-013F44D29446@aim.com>
To: www-validator@w3.org
Hello, Validator,

NOTE: Whenever possible, give the address of the document you were checking.


contains numerous links with backslashes in URLs, such as:


(although the author may be in the process of fixing them).

RFC 1738 says backslashes are unsafe and must be escaped:


w3's HTML validation fails to report this RFC violation.  It should
because browser treatment of this invalid usage is inconsistent:
MSIE treats '\' as if it were '/'; Firefox simply passes it on as '\',
and the w3's own link validator encodes it as '%5C'.

Received on Thursday, 17 February 2011 07:57:43 UTC

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