. /src /parse_query.cpp
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1   // 1   //
2   // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com) 2   // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
3   // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com) 3   // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com)
4   // 4   //
5   // Distributed under the Boost Software License, Version 1.0. (See accompanying 5   // Distributed under the Boost Software License, Version 1.0. (See accompanying
6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7   // 7   //
8   // Official repository: https://github.com/CPPAlliance/url 8   // Official repository: https://github.com/CPPAlliance/url
9   // 9   //
10   10  
11   11  
12   #include <boost/url/detail/config.hpp> 12   #include <boost/url/detail/config.hpp>
13   #include <boost/url/parse_query.hpp> 13   #include <boost/url/parse_query.hpp>
14   #include <boost/url/rfc/query_rule.hpp> 14   #include <boost/url/rfc/query_rule.hpp>
15   #include <boost/url/grammar/parse.hpp> 15   #include <boost/url/grammar/parse.hpp>
16   16  
17   #include <boost/url/error.hpp> 17   #include <boost/url/error.hpp>
18   18  
19   namespace boost { 19   namespace boost {
20   namespace urls { 20   namespace urls {
21   21  
22   system::result<params_encoded_view> 22   system::result<params_encoded_view>
HITCBC 23   3171 parse_query(core::string_view s) noexcept 23   3171 parse_query(core::string_view s) noexcept
24   { 24   {
25   // Handle empty strings differently. 25   // Handle empty strings differently.
26   // We produce {}, versus empty but 26   // We produce {}, versus empty but
27   // present query in URL (e.g. "http:?") 27   // present query in URL (e.g. "http:?")
28   // which produces {{"", none}}. 28   // which produces {{"", none}}.
HITCBC 29   3171 if(s.empty()) 29   3171 if(s.empty())
30   { 30   {
31   // default-constructed string_view can return a null data pointer; 31   // default-constructed string_view can return a null data pointer;
32   // query_ref expects a valid pointer even when the buffer is empty. 32   // query_ref expects a valid pointer even when the buffer is empty.
HITCBC 33   14 auto const* data = s.data(); 33   14 auto const* data = s.data();
HITCBC 34   14 core::string_view empty(data ? data : "", 0); 34   14 core::string_view empty(data ? data : "", 0);
HITCBC 35   14 return params_encoded_view( 35   14 return params_encoded_view(
HITCBC 36   28 detail::query_ref( 36   28 detail::query_ref(
HITCBC 37   14 empty, 0, 0)); 37   14 empty, 0, 0));
38   } 38   }
HITCBC 39   3157 auto rv = grammar::parse(s, query_rule); 39   3157 auto rv = grammar::parse(s, query_rule);
HITCBC 40   3157 if(! rv) 40   3157 if(! rv)
HITCBC 41   2995 return rv.error(); 41   2995 return rv.error();
HITCBC 42   162 return params_encoded_view( 42   162 return params_encoded_view(
HITCBC 43   324 detail::query_ref( 43   324 detail::query_ref(
HITCBC 44   324 s, s.size(), rv->size())); 44   324 s, s.size(), rv->size()));
45   } 45   }
46   46  
47   } // urls 47   } // urls
48   } // boost 48   } // boost