A url resource that is a dot 2E

Question

I have a resource that is a   This means my url looks like this  http   myapp index   And i need to add query parameters so that it looks like this  http   myapp index   type xml I use Freemarker for the presentation of my resources and made a percent-encoding hack for this case    lt  if key matches        gt   lt li gt  lt a href    contextPath  index  2E  gt   key  lt  a gt  lt  li gt   lt   if gt    This works fine for Firefox  But all other Browsers like IE  Safari  Chrom  Opera just ignore my url encoded dot  http   myapp index  2E    Any suggestions

User · Accepted Answer

It s actually not really clearly stated in the standard  RFC 3986  whether a percent-encoded version of   or    is supposed to have the same this-folder up-a-folder meaning as the unescaped version  Section 3 3 only talks about    The path segments   and        without clarifying whether they match   and    before or after pct-encoding   Personally I find Firefox s interpretation that  2E does not mean   most practical  but unfortunately all the other browsers disagree  This would mean that you can t have a path component containing only   or      I think the only possible suggestion is    don t do that     There are other path components that are troublesome too  typically due to server limitations   2F   00 and  5C sequences in paths may also be blocked by some web servers  and the empty path segment can also cause problems  So in general it s not possible to fit all possible byte sequences into a path component

User · Answer

It is not possible    2 3 says that     is an unreserved character and that  URIs that differ in the replacement of an unreserved character with its corresponding percent-encoded US-ASCII octet are equivalent   Therefore    2E 2E  is the same as       and that will get normalized away    This is a combination of an answer by bobince and a comment by slowpoison

[url] A url resource that is a dot (%2E)

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