Check out Google's implementation of URL Canonicalizand hashing, it is interesting. (just a thought)

[etherx-dev]

Canonicalize("http://host/%25%32%35") = "http://host/%25"; Canonicalize("http://host/%25%32%35%25%32%35") = "http://host/%25%25"; Canonicalize("http://host/%2525252525252525") = "http://host/%25"; Canonicalize("http://host/asdf%25%32%35asd") = "http://host/asdf%25asd"; Canonicalize("http://host/%%%25%32%35asd%%") = "http://host/%25%25%25asd%25%25"; Canonicalize("http://www.google.com/") = "http://www.google.com/"; Canonicalize("http://%31%36%38%2e%31%38%38%2e%39%39%2e%32%36/%2E%73%65%63%75%72%65/%77%77%77%2E%65%62%61%79%2E%63%6F%6D/") = "http://168.188.99.26/.secure/www.ebay.com/"; Canonicalize("http://195.127.0.11/uploads/%20%20%20%20/.verify/.eBaysecure=updateuserdataxplimnbqmn-xplmvalidateinfoswqpcmlx=hgplmcx/") = "http://195.127.0.11/uploads/%20%20%20%20/.verify/.eBaysecure=updateuserdataxplimnbqmn-xplmvalidateinfoswqpcmlx=hgplmcx/"; Canonicalize("http://host%23.com/%257Ea%2521b%2540c%2523d%2524e%25f%255E00%252611%252A22%252833%252944_55%252B") = "http://host%23.com/~a!b@c%23d$e%25f^00&11*22(33)44_55+"; Canonicalize("http://3279880203/blah") = "http://195.127.0.11/blah"; Canonicalize("http://www.google.com/blah/..") = "http://www.google.com/"; Canonicalize("www.google.com/") = "http://www.google.com/"; Canonicalize("www.google.com") = "http://www.google.com/"; Canonicalize("http://www.evil.com/blah#frag") = "http://www.evil.com/blah"; Canonicalize("http://www.GOOgle.com/") = "http://www.google.com/"; Canonicalize("http://www.google.com.../") = "http://www.google.com/"; Canonicalize("http://www.google.com/foo\tbar\rbaz\n2") ="http://www.google.com/foobarbaz2"; Canonicalize("http://www.google.com/q?") = "http://www.google.com/q?"; Canonicalize("http://www.google.com/q?r?") = "http://www.google.com/q?r?"; Canonicalize("http://www.google.com/q?r?s") = "http://www.google.com/q?r?s"; Canonicalize("http://evil.com/foo#bar#baz") = "http://evil.com/foo"; Canonicalize("http://evil.com/foo;") = "http://evil.com/foo;"; Canonicalize("http://evil.com/foo?bar;") = "http://evil.com/foo?bar;"; Canonicalize("http://\x01\x80.com/") = "http://%01%80.com/"; Canonicalize("http://notrailingslash.com") = "http://notrailingslash.com/"; Canonicalize("http://www.gotaport.com:1234/") = "http://www.gotaport.com/"; Canonicalize(" http://www.google.com/ ") = "http://www.google.com/"; Canonicalize("http:// leadingspace.com/") = "http://%20leadingspace.com/"; Canonicalize("http://%20leadingspace.com/") = "http://%20leadingspace.com/"; Canonicalize("%20leadingspace.com/") = "http://%20leadingspace.com/"; Canonicalize("https://www.securesite.com/") = "https://www.securesite.com/"; Canonicalize("http://host.com/ab%23cd") = "http://host.com/ab%23cd"; Canonicalize("http://host.com//twoslashes?more//slashes") = "http://host.com/twoslashes?more//slashes";
https://developers.google.com/safe-browsing/v4/urls-hashing

I came across the documentation above while trying to understand how sha256 hashing works. They could do with improvements but i also think ZeroNet could benifit from some of the working structures used for inspiration.