mirror of
https://github.com/matrix-construct/construct
synced 2024-12-30 17:34:04 +01:00
751 lines
16 KiB
C++
751 lines
16 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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namespace ircd { namespace rfc3986
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__attribute__((visibility("hidden")))
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{
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using namespace ircd::spirit;
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struct encoder extern const encoder;
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struct decoder extern const decoder;
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}}
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namespace ircd { namespace rfc3986 { namespace parser
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__attribute__((visibility("hidden")))
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{
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using namespace ircd::spirit;
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}}}
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struct ircd::rfc3986::encoder
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:karma::grammar<char *, const string_view>
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{
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[[noreturn]] void throw_illegal()
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{
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throw encoding_error
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{
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"Generator Protection: urlencode"
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};
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}
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karma::rule<char *, const string_view> url_encoding
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{
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*(karma::char_("A-Za-z0-9") | (karma::lit('%') << karma::hex))
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,"url encoding"
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};
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encoder(): encoder::base_type{url_encoding} {}
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}
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const ircd::rfc3986::encoder;
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struct ircd::rfc3986::decoder
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:qi::grammar<const char *, mutable_buffer>
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{
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template<class R = unused_type, class... S> using rule = qi::rule<const char *, R, S...>;
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rule<> url_illegal
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{
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char_(0x00, 0x1f)
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,"url illegal"
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};
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rule<char()> url_encodable
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{
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char_("A-Za-z0-9")
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,"url encodable character"
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};
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rule<char()> urlencoded_character
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{
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'%' > qi::uint_parser<char, 16, 2, 2>{}
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,"urlencoded character"
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};
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rule<mutable_buffer> url_decode
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{
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*((char_ - '%') | urlencoded_character)
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,"urldecode"
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};
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decoder(): decoder::base_type { url_decode } {}
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}
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const ircd::rfc3986::decoder;
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decltype(ircd::rfc3986::parser::sub_delims)
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ircd::rfc3986::parser::sub_delims
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{
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lit('!') | lit('$') | lit('&') | lit('\'') |
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lit('(') | lit(')') | lit('*') | lit('+') |
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lit(',') | lit(';') | lit('=')
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,"sub-delims"
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};
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decltype(ircd::rfc3986::parser::gen_delims)
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ircd::rfc3986::parser::gen_delims
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{
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lit(':') | lit('/') | lit('?') | lit('#') |
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lit('[') | lit(']') | lit('@')
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,"gen-delims"
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};
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decltype(ircd::rfc3986::parser::unreserved)
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ircd::rfc3986::parser::unreserved
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{
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ascii::alpha | ascii::digit |
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lit('-') | lit('.') | lit('_') | lit('~')
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,"reserved"
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};
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decltype(ircd::rfc3986::parser::reserved)
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ircd::rfc3986::parser::reserved
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{
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gen_delims | sub_delims
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,"reserved"
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};
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decltype(ircd::rfc3986::parser::pct_encoded)
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ircd::rfc3986::parser::pct_encoded
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{
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lit('%') >> repeat(2)[ascii::xdigit]
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,"pct-encoded"
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};
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decltype(ircd::rfc3986::parser::pchar)
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ircd::rfc3986::parser::pchar
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{
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unreserved | pct_encoded | sub_delims | lit(':') | lit('@')
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,"pchar"
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};
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decltype(ircd::rfc3986::parser::query)
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ircd::rfc3986::parser::query
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{
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*(pchar | lit('/') | lit('?'))
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,"query"
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};
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decltype(ircd::rfc3986::parser::fragment)
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ircd::rfc3986::parser::fragment
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{
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*(pchar | lit('/') | lit('?'))
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,"fragment"
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};
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decltype(ircd::rfc3986::parser::segment_nz_nc)
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ircd::rfc3986::parser::segment_nz_nc
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{
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+(unreserved | pct_encoded | sub_delims | lit('@'))
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,"segment-nz-nc"
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};
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decltype(ircd::rfc3986::parser::segment_nz)
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ircd::rfc3986::parser::segment_nz
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{
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+pchar
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,"segment-nz"
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};
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decltype(ircd::rfc3986::parser::segment)
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ircd::rfc3986::parser::segment
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{
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*pchar
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,"segment"
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};
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decltype(ircd::rfc3986::parser::path_abempty)
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ircd::rfc3986::parser::path_abempty
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{
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*(lit('/') >> segment)
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,"path-abempty"
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};
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decltype(ircd::rfc3986::parser::path_noscheme)
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ircd::rfc3986::parser::path_noscheme
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{
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segment_nz_nc >> *(lit('/') >> segment)
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,"path-noscheme"
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};
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decltype(ircd::rfc3986::parser::path_rootless)
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ircd::rfc3986::parser::path_rootless
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{
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segment_nz >> *(lit('/') >> segment)
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,"path-rootless"
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};
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decltype(ircd::rfc3986::parser::path_absolute)
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ircd::rfc3986::parser::path_absolute
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{
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lit('/') >> -(path_rootless)
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,"path-absolute"
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};
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decltype(ircd::rfc3986::parser::path)
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ircd::rfc3986::parser::path
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{
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-(path_abempty | path_absolute | path_noscheme | path_rootless)
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,"path"
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};
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decltype(ircd::rfc3986::parser::reg_name)
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ircd::rfc3986::parser::reg_name
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{
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*(unreserved | pct_encoded | sub_delims)
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,"reg-name"
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};
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decltype(ircd::rfc3986::parser::userinfo)
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ircd::rfc3986::parser::userinfo
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{
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*(unreserved | pct_encoded | sub_delims | lit(':'))
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,"userinfo"
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};
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decltype(ircd::rfc3986::parser::port)
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ircd::rfc3986::parser::port
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{
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ushort_
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,"port number"
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};
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decltype(ircd::rfc3986::parser::ip4_octet)
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ircd::rfc3986::parser::ip4_octet
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{
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repeat(1,3)[char_("0-9")]
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,"IPv4 octet"
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};
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decltype(ircd::rfc3986::parser::ip4_address)
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ircd::rfc3986::parser::ip4_address
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{
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repeat(3)[ip4_octet >> '.'] >> ip4_octet
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,"IPv4 address"
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};
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decltype(ircd::rfc3986::parser::ip4_literal)
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ircd::rfc3986::parser::ip4_literal
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{
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ip4_address
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,"IPv4 literal"
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};
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decltype(ircd::rfc3986::parser::ip4_remote)
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ircd::rfc3986::parser::ip4_remote
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{
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ip4_literal >> -(':' > port)
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,"IPv4 remote"
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};
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decltype(ircd::rfc3986::parser::ip6_char)
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ircd::rfc3986::parser::ip6_char
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{
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char_("0-9a-fA-F")
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,"IPv6 character"
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};
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decltype(ircd::rfc3986::parser::ip6_h16)
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ircd::rfc3986::parser::ip6_h16
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{
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repeat(1,4)[ip6_char]
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,"IPv6 hexdigit"
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};
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decltype(ircd::rfc3986::parser::ip6_piece)
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ircd::rfc3986::parser::ip6_piece
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{
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ip6_h16 >> ':'
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,"IPv6 address piece"
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};
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// This is reversed from the BNF in the RFC otherwise it requires
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// backtracking during the repeat[]; parsers are adjusted accordingly.
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decltype(ircd::rfc3986::parser::ip6_ipiece)
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ircd::rfc3986::parser::ip6_ipiece
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{
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':' >> ip6_h16
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,"IPv6 address piece"
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};
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decltype(ircd::rfc3986::parser::ip6_ls32)
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ircd::rfc3986::parser::ip6_ls32
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{
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(ip6_h16 >> ':' >> ip6_h16) | ip4_address
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};
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/// https://tools.ietf.org/html/rfc3986 Appendix A
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decltype(ircd::rfc3986::parser::ip6_addr)
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ircd::rfc3986::parser::ip6_addr
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{
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{ repeat(6)[ip6_piece] >> ip6_ls32 },
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{ lit("::") >> repeat(5)[ip6_piece] >> ip6_ls32 },
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{ ip6_h16 >> lit("::") >> repeat(4)[ip6_piece] >> ip6_ls32 },
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{ ip6_h16 >> repeat(0,1)[ip6_ipiece] >> lit("::") >> repeat(3)[ip6_piece] >> ip6_ls32 },
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{ ip6_h16 >> repeat(0,2)[ip6_ipiece] >> lit("::") >> repeat(2)[ip6_piece] >> ip6_ls32 },
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{ ip6_h16 >> repeat(0,3)[ip6_ipiece] >> lit("::") >> ip6_piece >> ip6_ls32 },
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{ ip6_h16 >> repeat(0,4)[ip6_ipiece] >> lit("::") >> ip6_ls32 },
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{ ip6_h16 >> repeat(0,5)[ip6_ipiece] >> lit("::") >> -ip6_h16 },
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{ lit("::") >> -ip6_h16 },
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};
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decltype(ircd::rfc3986::parser::ip6_address)
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ircd::rfc3986::parser::ip6_address
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{
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ip6_addr[0] | ip6_addr[1] | ip6_addr[2] |
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ip6_addr[3] | ip6_addr[4] | ip6_addr[5] |
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ip6_addr[6] | ip6_addr[7] | ip6_addr[8]
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,"IPv6 address"
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};
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decltype(ircd::rfc3986::parser::ip6_literal)
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ircd::rfc3986::parser::ip6_literal
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{
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'[' >> ip6_address >> ']'
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,"IPv6 literal"
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};
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decltype(ircd::rfc3986::parser::ip6_remote)
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ircd::rfc3986::parser::ip6_remote
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{
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ip6_literal >> -(':' > port)
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,"IPv6 literal"
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};
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decltype(ircd::rfc3986::parser::ip_address)
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ircd::rfc3986::parser::ip_address
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{
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ip4_address | ip6_address
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,"IP address"
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};
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decltype(ircd::rfc3986::parser::ip_literal)
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ircd::rfc3986::parser::ip_literal
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{
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ip6_literal | ip4_literal
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,"IP literal"
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};
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decltype(ircd::rfc3986::parser::ip_remote)
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ircd::rfc3986::parser::ip_remote
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{
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ip_literal >> -(':' > port)
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,"IP literal"
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};
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decltype(ircd::rfc3986::parser::hostname)
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ircd::rfc3986::parser::hostname
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{
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char_("A-Za-z0-9") >> *(char_("A-Za-z0-9\x2D")) // x2D is '-'
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,"hostname"
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};
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decltype(ircd::rfc3986::parser::domain)
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ircd::rfc3986::parser::domain
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{
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hostname % '.'
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,"domain"
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};
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decltype(ircd::rfc3986::parser::hostport)
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ircd::rfc3986::parser::hostport
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{
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domain >> -(':' > port)
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,"hostport"
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};
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decltype(ircd::rfc3986::parser::host)
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ircd::rfc3986::parser::host
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{
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ip_address | domain
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,"host"
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};
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decltype(ircd::rfc3986::parser::host_literal)
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ircd::rfc3986::parser::host_literal
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{
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ip_literal | domain
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,"host literal"
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};
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decltype(ircd::rfc3986::parser::remote)
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ircd::rfc3986::parser::remote
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{
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ip_remote | hostport
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,"remote"
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};
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decltype(ircd::rfc3986::parser::authority)
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ircd::rfc3986::parser::authority
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{
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-(userinfo >> lit('@')) >> remote
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,"authority"
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};
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decltype(ircd::rfc3986::parser::scheme)
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ircd::rfc3986::parser::scheme
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{
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ascii::alpha >> *(ascii::alnum | lit('+') | lit('-') | lit('.'))
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,"scheme"
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};
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decltype(ircd::rfc3986::parser::hier_part)
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ircd::rfc3986::parser::hier_part
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{
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-((lit("//") >> authority >> path_abempty) | path_absolute | path_rootless)
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,"hier_part"
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};
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decltype(ircd::rfc3986::parser::relative_part)
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ircd::rfc3986::parser::relative_part
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{
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-((lit("//") >> authority >> path_abempty) | path_absolute | path_noscheme)
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,"relative-part"
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};
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decltype(ircd::rfc3986::parser::relative_ref)
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ircd::rfc3986::parser::relative_ref
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{
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relative_part >> -(lit('?') >> query) >> -(lit('#') >> fragment)
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,"relative-ref"
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};
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decltype(ircd::rfc3986::parser::absolute_uri)
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ircd::rfc3986::parser::absolute_uri
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{
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scheme >> lit(':') >> hier_part >> -(lit('?') >> query)
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,"absolute-URI"
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};
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decltype(ircd::rfc3986::parser::uri)
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ircd::rfc3986::parser::uri
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{
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scheme >> lit(':') >> hier_part >> -(lit('?') >> query) >> -(lit('#') >> fragment)
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,"URI"
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};
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decltype(ircd::rfc3986::parser::uri_ref)
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ircd::rfc3986::parser::uri_ref
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{
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uri | relative_ref
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,"URI-reference"
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};
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//
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// uri decompose
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//
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BOOST_FUSION_ADAPT_STRUCT
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(
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ircd::rfc3986::uri,
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( decltype(ircd::rfc3986::uri::scheme), scheme )
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( decltype(ircd::rfc3986::uri::user), user )
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( decltype(ircd::rfc3986::uri::remote), remote )
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( decltype(ircd::rfc3986::uri::path), path )
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( decltype(ircd::rfc3986::uri::query), query )
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( decltype(ircd::rfc3986::uri::fragment), fragment )
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)
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ircd::rfc3986::uri::uri(const string_view &input)
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{
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static const parser::rule<rfc3986::uri> rule
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{
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raw[parser::scheme] >> lit("://")
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>> -raw[parser::userinfo >> lit('@')]
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>> raw[parser::remote]
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>> raw[parser::path_abempty]
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>> -raw[lit('?') >> parser::query]
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>> -raw[lit('#') >> parser::fragment]
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};
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const char *start(begin(input)), *const stop(end(input));
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qi::parse(start, stop, eps > rule, *this);
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//TODO: XXX Can this go?
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this->user = rstrip(this->user, '@');
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this->query = lstrip(this->query, '?');
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this->fragment = lstrip(this->fragment, '#');
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}
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//
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// general interface
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//
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ircd::string_view
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ircd::rfc3986::encode(const mutable_buffer &out,
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const json::members &members)
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{
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window_buffer buf{out};
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const auto append{[&buf](const json::member &member)
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{
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assert(type(member.first) == json::STRING);
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if(unlikely(!member.second.serial && type(member.second) != json::STRING))
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throw panic
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{
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"Cannot encode non-serial json::member type '%s'",
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reflect(type(member.second))
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};
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consume(buf, size(encode(buf, member.first)));
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consume(buf, copy(buf, "="_sv));
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consume(buf, size(encode(buf, member.second)));
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}};
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auto it(begin(members));
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if(it != end(members))
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{
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append(*it);
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for(++it; it != end(members); ++it)
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{
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consume(buf, copy(buf, "&"_sv));
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append(*it);
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}
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}
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return buf.completed();
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}
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ircd::string_view
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ircd::rfc3986::encode(const mutable_buffer &buf,
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const string_view &url)
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{
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char *out(data(buf));
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karma::generate(out, maxwidth(size(buf))[encoder], url);
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return string_view
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{
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data(buf), size_t(std::distance(data(buf), out))
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};
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}
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ircd::string_view
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ircd::rfc3986::decode(const mutable_buffer &buf,
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const string_view &url)
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try
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{
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const char *start(url.data()), *const stop
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{
|
|
start + std::min(size(url), size(buf))
|
|
};
|
|
|
|
mutable_buffer mb
|
|
{
|
|
data(buf), size_t(0)
|
|
};
|
|
|
|
qi::parse(start, stop, eps > decoder, mb);
|
|
return string_view
|
|
{
|
|
data(mb), size(mb)
|
|
};
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
const auto rule
|
|
{
|
|
ircd::string(e.what_)
|
|
};
|
|
|
|
throw decoding_error
|
|
{
|
|
"I require a valid urlencoded %s. You sent %zu invalid chars starting with `%s'.",
|
|
between(rule, "<", ">"),
|
|
size_t(e.last - e.first),
|
|
string_view{e.first, e.last}
|
|
};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::rfc3986::host(const string_view &str)
|
|
try
|
|
{
|
|
static const parser::rule<string_view> literal
|
|
{
|
|
parser::ip6_address
|
|
};
|
|
|
|
static const parser::rule<string_view> non_literal
|
|
{
|
|
parser::ip6_address | parser::ip4_address | parser::domain
|
|
};
|
|
|
|
static const parser::rule<string_view> rule
|
|
{
|
|
(lit('[') >> raw[literal]) | raw[non_literal]
|
|
,"host"
|
|
};
|
|
|
|
string_view ret;
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
qi::parse(start, stop, eps > rule, ret);
|
|
return ret;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure<error>{e};
|
|
}
|
|
|
|
uint16_t
|
|
ircd::rfc3986::port(const string_view &str)
|
|
try
|
|
{
|
|
static const parser::rule<> literal
|
|
{
|
|
parser::ip6_literal | parser::ip4_literal | parser::domain
|
|
};
|
|
|
|
static const parser::rule<> non_literal
|
|
{
|
|
parser::ip6_address
|
|
};
|
|
|
|
static const parser::rule<uint16_t> rule
|
|
{
|
|
non_literal | (literal >> -(lit(':') >> parser::port) >> eoi)
|
|
,"port"
|
|
};
|
|
|
|
uint16_t ret(0);
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
qi::parse(start, stop, rule, ret);
|
|
return ret;
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure<error>{e};
|
|
}
|
|
|
|
//
|
|
// validators
|
|
//
|
|
|
|
bool
|
|
ircd::rfc3986::valid_remote(std::nothrow_t,
|
|
const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX + 6)
|
|
return false;
|
|
|
|
return valid(std::nothrow, parser::remote, str);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_remote(const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX + 6)
|
|
throw error
|
|
{
|
|
"String length %zu exceeds maximum of %zu characters",
|
|
size(str),
|
|
DOMAIN_MAX + 6
|
|
};
|
|
|
|
valid(parser::remote, str);
|
|
}
|
|
|
|
bool
|
|
ircd::rfc3986::valid_domain(std::nothrow_t,
|
|
const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX)
|
|
return false;
|
|
|
|
return valid(std::nothrow, parser::domain, str);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_domain(const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX)
|
|
throw error
|
|
{
|
|
"String length %zu exceeds maximum of %zu characters",
|
|
size(str),
|
|
DOMAIN_MAX
|
|
};
|
|
|
|
valid(parser::domain, str);
|
|
}
|
|
|
|
bool
|
|
ircd::rfc3986::valid_host(std::nothrow_t,
|
|
const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX)
|
|
return false;
|
|
|
|
return valid(std::nothrow, parser::host, str);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_host(const string_view &str)
|
|
{
|
|
if(str.size() > DOMAIN_MAX)
|
|
throw error
|
|
{
|
|
"String length %zu exceeds maximum of %zu characters",
|
|
size(str),
|
|
DOMAIN_MAX
|
|
};
|
|
|
|
valid(parser::host, str);
|
|
}
|
|
|
|
bool
|
|
ircd::rfc3986::valid_hostname(std::nothrow_t,
|
|
const string_view &str)
|
|
{
|
|
if(str.size() > HOSTNAME_MAX)
|
|
return false;
|
|
|
|
return valid(std::nothrow, parser::hostname, str);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_hostname(const string_view &str)
|
|
{
|
|
if(str.size() > HOSTNAME_MAX)
|
|
throw error
|
|
{
|
|
"String length %zu exceeds maximum of %zu characters",
|
|
size(str),
|
|
HOSTNAME_MAX
|
|
};
|
|
|
|
valid(parser::hostname, str);
|
|
}
|
|
|
|
bool
|
|
ircd::rfc3986::valid(std::nothrow_t,
|
|
const parser::rule<> &rule,
|
|
const string_view &str)
|
|
{
|
|
const parser::rule<> only_rule
|
|
{
|
|
rule >> eoi
|
|
};
|
|
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
return qi::parse(start, stop, only_rule);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid(const parser::rule<> &rule,
|
|
const string_view &str)
|
|
try
|
|
{
|
|
const parser::rule<> only_rule
|
|
{
|
|
rule >> eoi
|
|
};
|
|
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
qi::parse(start, stop, eps > only_rule);
|
|
}
|
|
catch(const qi::expectation_failure<const char *> &e)
|
|
{
|
|
throw expectation_failure<error>{e};
|
|
}
|