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From "Jonathan Moore (JIRA)" <j...@apache.org>
Subject [jira] Created: (HTTPCLIENT-987) cache module does not recognize equivalent URIs
Date Sat, 04 Sep 2010 21:42:33 GMT
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


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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