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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HTTPCLIENT-987) cache module does not recognize equivalent URIs
Date Mon, 06 Sep 2010 22:01:39 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Oleg Kalnichevski resolved HTTPCLIENT-987.

    Fix Version/s: 4.1 Alpha3
       Resolution: Fixed

Patch checked in.


> cache module does not recognize equivalent URIs
> -----------------------------------------------
>                 Key: HTTPCLIENT-987
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-987
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: Cache
>    Affects Versions: 4.1 Alpha2
>            Reporter: Jonathan Moore
>             Fix For: 4.1 Alpha3
>         Attachments: canonical-uris.patch
> http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.2.3
> "When comparing two URIs to decide if they match or not, a client SHOULD use a case-sensitive
octet-by-octet comparison of the entire URIs, with these exceptions:
>   * A port that is empty or not given is equivalent to the default port for that URI-reference;
>   * Comparisons of host names MUST be case-insensitive;
>   * Comparisons of scheme names MUST be case-insensitive;
>   * An empty abs_path is equivalent to an abs_path of "/".
> Characters other than those in the "reserved" and "unsafe" sets (see RFC 2396 [42]) are
equivalent to their ""%" HEX HEX" encoding.
> For example, the following three URIs are equivalent:
>       http://abc.com:80/~smith/home.html
>       http://ABC.com/%7Esmith/home.html
>       http://ABC.com:/%7esmith/home.html"
> The current implementation does not canonicalize the URIs it uses for cache keys, and
so is missing potential cache hits. More importantly, though, required invalidations due to
PUT/POST/DELETE to a URI (as well as those mentioned in Location or Content-Location headers)
may not occur properly due to this bug.

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