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Re: [Bug-wget] [PATCH] Keep fetched URLs in POSIX extended attributes


From: Tim Ruehsen
Subject: Re: [Bug-wget] [PATCH] Keep fetched URLs in POSIX extended attributes
Date: Fri, 22 Jul 2016 14:04:38 +0200
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Hi Sean,

thank you very much, definitely a very nice feature !

I extended the commit message with GNU stuff and pushed it.

This feature deserves to be extended :-)
I have the mime type and the content charset in mind.

BTW, what is the 'cost' for this feature regarding disk space ?

Regards, Tim

On Thursday, July 21, 2016 2:33:23 PM CEST Sean Burford wrote:
> Hi,
> 
> I find it useful to keep track of where files are downloaded from.  POSIX
> extended attributes provide a lightweight portable method of keeping this
> information across Linux, OS/X, FreeBSD and many other platforms.
> 
> This compliments wget's existing WARC support, which serves a related but
> different use case closer to tcpdump or tar for web pages.  Extended
> attributes can provide a quick answer to "where did I get this file from
> again?"
> 
> This patch changes:
> *   autoconf detects whether extended attributes are available and enables
> the code if they are.
> *   The new flags --xattr and --no-xattr control whether xattr is enabled.
> *   The new command "xattr = (on|off)" can be used in ~/.wgetrc or
> /etc/wgetrc
> *   The original and redirected URLs are recorded as shown below.
> *   This works for both single fetches and recursive mode.
> 
> Here is an example, where http://archive.org redirects to
> https://archive.org:
> $ wget --xattr http://archive.org
> ...
> $ getfattr -d index.html
> user.xdg.origin.url="https://archive.org/";
> user.xdg.referrer.url="http://archive.org/";
> 
> These attributes were chosen based on those stored by Google Chrome (
> https://bugs.chromium.org/p/chromium/issues/detail?id=45903) and curl (
> https://github.com/curl/curl/blob/master/src/tool_xattr.c)

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