Canonical URLs for REST resources
Question
With plain-old webpages, if you have duplicate content in two locations, you can flag one as 'canonical' so web crawlers and such know that this is just another reference to a resource and explicitly defines the URL of the 'true' location for the content. This is done by using a link tag in the HTML <head> tags of the non-canonical page pointing to the original.
<link rel="canonical" href="http://www.example.com/the-real-url-of-this-content.php>
In the realm of RESTful web services:
- Is this needed, recommended, or not advisable to do?
- Is Canonical only a construct for HTML to flag content for search engines?
- If needed, how is the same accomplished with HTTP headers? I'm not return HTML (just a JSON object) so the link tag makes no sense...
- Does it matter whether or not there is more than one URLs for a unique resource in REST
1 answers
solution1
2 ACCPTED 2012-07-19 17:18:58
RFC 6596 potentially answers this.
- Hard to say.
- It's a generic link relation, but it has been "invented" by Google.
- See the spec (you could use the HTTP "Link" header field as well).
- No, it does not matter; but avoiding multiple URIs for the same thing of course is a good idea no matter what.
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