various fixes for http_uri.erl

[Igor Goryachev]

Hello.

Here are several improvements for URI parsing in http_uri.erl. First is
for handling data not only in US ASCII charset:

*** Before:
> http_uri:parse("http://www.google.com/search?hl=en&q=a%D1%85%D1%83%D0%B9&btnG=Google+Search").
{error,no_query}

*** After:
> http_uri:parse("http://www.google.com/search?hl=en&q=a%D1%85%D1%83%D0%B9&btnG=Google+Search").
{http,"www.google.com",
      80,
      "/search",
      "?hl=en&q=a%d1%85%d1%83%d0%b9&btnG=Google+Search"}

Second allows to handle arbitary data:

*** Before:
> http_uri:parse("http://www.google.com/search?hl=en&q=%25%25").
=ERROR REPORT==== 3-Jul-2006::13:19:49 ===
Error in process <0.32.0> with exit value: {function_clause,[{http_uri,hex2dec,"%"},{http_uri,scan_query,2},{http_uri,scan_pathquery,1},{http_uri,parse_http,2},{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}

** exited: {function_clause,[{http_uri,hex2dec,"%"},
                             {http_uri,scan_query,2},
                             {http_uri,scan_pathquery,1},
                             {http_uri,parse_http,2},
                             {erl_eval,do_apply,5},
                             {shell,exprs,6},
                             {shell,eval_loop,3}]} **

> http_uri:parse("http://www.google.com/search?hl=en&q=%foo").

=ERROR REPORT==== 3-Jul-2006::13:28:33 ===
Error in process <0.39.0> with exit value: {function_clause,[{http_uri,hex2dec,"o"},{http_uri,scan_query,2},{http_uri,scan_pathquery,1},{http_uri,parse_http,2},{erl_eval,do_apply,5},{shell,exprs,6},{shell,eval_loop,3}]}

** exited: {function_clause,[{http_uri,hex2dec,"o"},
                             {http_uri,scan_query,2},
                             {http_uri,scan_pathquery,1},
                             {http_uri,parse_http,2},
                             {erl_eval,do_apply,5},
                             {shell,exprs,6},
                             {shell,eval_loop,3}]} **


*** After:
> http_uri:parse("http://www.google.com/search?hl=en&q=%25%25").
{http,"www.google.com",80,"/search","?hl=en&q=%25%25"}

> http_uri:parse("http://www.google.com/search?hl=en&q=%foo").
{http,"www.google.com",80,"/search","?hl=en&q=%25foo"}


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-- 
Igor Goryachev
Yandex development team.