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Re: Link relation types for non-GET links

Julian Reschke <julian.reschke@gmx.de> Sat, 15 August 2015 12:21 UTC

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Subject: Re: Link relation types for non-GET links
To: Klaus Hartke <hartke@tzi.org>
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From: Julian Reschke <julian.reschke@gmx.de>
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Date: Sat, 15 Aug 2015 14:21:18 +0200
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On 2015-08-15 14:16, Klaus Hartke wrote:
> Julian Reschke wrote:
>>> How does a spider distinguish between safe links and unsafe non-GET links?
>>
>> A spider is not supposed to use methods other than GET, so how is this a
>> problem?
>
> If the spider does not know the link relation type, it will assume
> that there is a safe link between the two resources even when the link
> relation type defines the link to be unsafe. But maybe that's not a
> big problem.

The link relation by definition can not be "unsafe".

> It's just that HTML defines a number of syntactically different
> hypermedia controls (<a>, <img>, <form>), so a spider can understand
> whether the link is safe or not even if it does not recognize the link
> relation type.

The link is always safe; it's the method applied to the link target 
which might not.

Best regards, Julian

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