809 lines
17 KiB
C++
809 lines
17 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::rfc3986::parser
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{
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using namespace ircd::spirit;
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}
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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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,"unreserved"
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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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#pragma GCC visibility push(internal)
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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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#pragma GCC visibility pop
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namespace ircd::rfc3986::parser
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{
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static const expr uri_parse
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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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,"uri"
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};
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static const rule<rfc3986::uri> parse_uri
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{
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expect[uri_parse]
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,"uri"
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};
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}
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ircd::rfc3986::uri::uri(const string_view &input)
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{
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const char *start(begin(input)), *const stop(end(input));
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ircd::parse<error>(start, stop, parser::parse_uri, *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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// uri decoding
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//
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namespace ircd::rfc3986::parser::decoder
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{
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template<class R = unused_type,
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class... S>
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struct [[gnu::visibility("internal")]] rule
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:qi::rule<const char *, R, S...>
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{
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using qi::rule<const char *, R, S...>::rule;
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};
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static const auto is_safe
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{
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[](const int8_t val, auto &c, bool &pass)
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{
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pass = (val > 0x1F) | (val < 0x00);
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attr_at<0>(c) = val;
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}
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};
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const rule<char()> decode_char_safe
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{
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lit('%') > qi::int_parser<uint8_t, 16, 2, 2>{}[is_safe]
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,"url decodable character"
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};
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const expr decode_char
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{
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lit('%') >> qi::int_parser<uint8_t, 16, 2, 2>{}
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,"url decodable character"
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};
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const expr unreserved_char
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{
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//char_("A-Za-z0-9._~!$+*'(),-")
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//NOTE: allow any non-control character here. No reason for trouble with
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//NOTE: already-decoded inputs unless some other grammar expects it.
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(~ascii::cntrl) - '%'
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,"url unreserved characters"
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};
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const rule<mutable_buffer> decode_safe
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{
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*(unreserved_char | decode_char_safe)
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,"url safe decode"
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};
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const rule<mutable_buffer> decode_unsafe
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{
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*((char_ - '%') | decode_char)
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,"url unsafe decode"
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};
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}
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ircd::const_buffer
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ircd::rfc3986::decode_unsafe(const mutable_buffer &buf,
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const string_view &url)
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noexcept
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{
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const char *start(url.data()), *const stop
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{
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start + std::min(size(url), size(buf))
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};
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mutable_buffer mb
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{
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data(buf), size_t(0)
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};
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const bool ok
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{
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ircd::parse(std::nothrow, start, stop, parser::decoder::decode_unsafe, mb)
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};
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assert(size(mb) <= size(url));
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return string_view
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{
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data(mb), size(mb)
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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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{
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const char *start(url.data()), *const stop
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{
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start + std::min(size(url), size(buf))
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};
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mutable_buffer mb
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{
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data(buf), size_t(0)
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};
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const bool ok
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{
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ircd::parse<decoding_error>(start, stop, parser::decoder::decode_safe, mb)
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};
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assert(size(mb) <= size(url));
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return string_view
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{
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data(mb), size(mb)
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};
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}
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//
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// uri encoding
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//
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namespace ircd::rfc3986::parser::encoder
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{
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template<class R = unused_type,
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class... S>
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struct [[gnu::visibility("internal")]] rule
|
|
:karma::rule<char *, R, S...>
|
|
{
|
|
using karma::rule<char *, R, S...>::rule;
|
|
};
|
|
|
|
const rule<char()> unreserved
|
|
{
|
|
char_("A-Za-z0-9._~-")
|
|
,"url unencoded"
|
|
};
|
|
|
|
const rule<string_view> encode
|
|
{
|
|
*(unreserved | (lit('%') << karma::right_align(2, '0')[karma::upper[karma::hex]]))
|
|
,"url encode"
|
|
};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::rfc3986::encode(const mutable_buffer &out,
|
|
const json::members &members)
|
|
{
|
|
window_buffer buf{out};
|
|
const auto append{[&buf](const json::member &member)
|
|
{
|
|
assert(type(member.first) == json::STRING);
|
|
if(unlikely(!member.second.serial && type(member.second) != json::STRING))
|
|
throw panic
|
|
{
|
|
"Cannot encode non-serial json::member type '%s'",
|
|
reflect(type(member.second))
|
|
};
|
|
|
|
consume(buf, size(encode(buf, member.first)));
|
|
consume(buf, copy(buf, '='));
|
|
consume(buf, size(encode(buf, member.second)));
|
|
}};
|
|
|
|
auto it(begin(members));
|
|
if(it != end(members))
|
|
{
|
|
append(*it);
|
|
for(++it; it != end(members); ++it)
|
|
{
|
|
consume(buf, copy(buf, '&'));
|
|
append(*it);
|
|
}
|
|
}
|
|
|
|
return buf.completed();
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::rfc3986::encode(const mutable_buffer &buf_,
|
|
const string_view &url)
|
|
{
|
|
mutable_buffer buf
|
|
{
|
|
buf_
|
|
};
|
|
|
|
const bool ok
|
|
{
|
|
ircd::generate(buf, parser::encoder::encode, url)
|
|
};
|
|
|
|
return string_view
|
|
{
|
|
data(buf_), data(buf)
|
|
};
|
|
}
|
|
|
|
//
|
|
// general interface
|
|
//
|
|
|
|
namespace ircd::rfc3986::parser
|
|
{
|
|
[[gnu::visibility("internal")]]
|
|
extern const rule<string_view>
|
|
host_literal_parse,
|
|
host_non_literal_parse,
|
|
host_alternative_parse,
|
|
host_parse;
|
|
|
|
[[gnu::visibility("internal")]]
|
|
extern const rule<uint16_t>
|
|
port_parse;
|
|
}
|
|
|
|
decltype(ircd::rfc3986::parser::host_literal_parse)
|
|
ircd::rfc3986::parser::host_literal_parse
|
|
{
|
|
parser::ip6_address
|
|
};
|
|
|
|
decltype(ircd::rfc3986::parser::host_non_literal_parse)
|
|
ircd::rfc3986::parser::host_non_literal_parse
|
|
{
|
|
parser::ip6_address | parser::ip4_address | parser::domain
|
|
};
|
|
|
|
decltype(ircd::rfc3986::parser::host_alternative_parse)
|
|
ircd::rfc3986::parser::host_alternative_parse
|
|
{
|
|
(&lit('[') > raw[host_literal_parse]) | raw[host_non_literal_parse]
|
|
,"host"
|
|
};
|
|
|
|
decltype(ircd::rfc3986::parser::host_parse)
|
|
ircd::rfc3986::parser::host_parse
|
|
{
|
|
expect[host_alternative_parse >> omit[&lit(':') | eoi]]
|
|
,"host"
|
|
};
|
|
|
|
decltype(ircd::rfc3986::parser::port_parse)
|
|
ircd::rfc3986::parser::port_parse
|
|
{
|
|
omit[host_alternative_parse] >> (omit[lit(':')] >> port) >> eoi
|
|
,"port"
|
|
};
|
|
|
|
ircd::string_view
|
|
ircd::rfc3986::host(const string_view &str)
|
|
{
|
|
string_view ret;
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
ircd::parse<error>(start, stop, parser::host_parse, ret);
|
|
assert(!ret.empty());
|
|
return ret;
|
|
}
|
|
|
|
uint16_t
|
|
ircd::rfc3986::port(const string_view &str)
|
|
{
|
|
uint16_t ret(0);
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
ircd::parse<error>(start, stop, parser::port_parse, ret);
|
|
return ret;
|
|
}
|
|
|
|
//
|
|
// validators
|
|
//
|
|
|
|
bool
|
|
ircd::rfc3986::valid_remote(std::nothrow_t,
|
|
const string_view &str)
|
|
{
|
|
if(likely(str.size() <= DOMAIN_MAX + 6))
|
|
return valid(std::nothrow, parser::remote, str);
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_remote(const string_view &str)
|
|
{
|
|
if(unlikely(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(likely(str.size() <= DOMAIN_MAX))
|
|
return valid(std::nothrow, parser::domain, str);
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_domain(const string_view &str)
|
|
{
|
|
if(unlikely(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(likely(str.size() <= DOMAIN_MAX))
|
|
return valid(std::nothrow, parser::host, str);
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_host(const string_view &str)
|
|
{
|
|
if(unlikely(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(likely(str.size() <= HOSTNAME_MAX))
|
|
return valid(std::nothrow, parser::hostname, str);
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid_hostname(const string_view &str)
|
|
{
|
|
if(unlikely(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 >> parser::eoi
|
|
};
|
|
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
return ircd::parse(std::nothrow, start, stop, only_rule);
|
|
}
|
|
|
|
void
|
|
ircd::rfc3986::valid(const parser::rule<> &rule,
|
|
const string_view &str)
|
|
{
|
|
const parser::rule<> only_rule
|
|
{
|
|
parser::eps > (rule >> parser::eoi)
|
|
};
|
|
|
|
const char *start(str.data()), *const stop(start + str.size());
|
|
ircd::parse<error>(start, stop, only_rule);
|
|
}
|