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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/http | ||
| 8 | // | ||
| 9 | |||
| 10 | #include "src/server/detail/pct_decode.hpp" | ||
| 11 | |||
| 12 | namespace boost { | ||
| 13 | namespace http { | ||
| 14 | namespace detail { | ||
| 15 | |||
| 16 | bool | ||
| 17 | 37 | ci_is_equal( | |
| 18 | core::string_view s0, | ||
| 19 | core::string_view s1) noexcept | ||
| 20 | { | ||
| 21 | 37 | auto n = s0.size(); | |
| 22 |
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37 | if(s1.size() != n) |
| 23 | ✗ | return false; | |
| 24 | 37 | auto p1 = s0.data(); | |
| 25 | 37 | auto p2 = s1.data(); | |
| 26 | char a, b; | ||
| 27 | // fast loop | ||
| 28 |
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155 | while(n--) |
| 29 | { | ||
| 30 | 126 | a = *p1++; | |
| 31 | 126 | b = *p2++; | |
| 32 |
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126 | if(a != b) |
| 33 | 8 | goto slow; | |
| 34 | } | ||
| 35 | 29 | return true; | |
| 36 | do | ||
| 37 | { | ||
| 38 | 5 | a = *p1++; | |
| 39 | 5 | b = *p2++; | |
| 40 | 13 | slow: | |
| 41 |
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26 | if( grammar::to_lower(a) != |
| 42 | 13 | grammar::to_lower(b)) | |
| 43 | 5 | return false; | |
| 44 | } | ||
| 45 |
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8 | while(n--); |
| 46 | 3 | return true; | |
| 47 | } | ||
| 48 | |||
| 49 | std::string | ||
| 50 | 116 | pct_decode( | |
| 51 | urls::pct_string_view s) | ||
| 52 | { | ||
| 53 | 116 | std::string result; | |
| 54 | 116 | core::string_view sv(s); | |
| 55 |
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116 | result.reserve(s.size()); |
| 56 | 116 | auto it = sv.data(); | |
| 57 | 116 | auto const end = it + sv.size(); | |
| 58 | for(;;) | ||
| 59 | { | ||
| 60 |
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377 | if(it == end) |
| 61 | 116 | break; | |
| 62 |
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261 | if(*it != '%') |
| 63 | { | ||
| 64 |
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260 | result.push_back(*it++); |
| 65 | 260 | continue; | |
| 66 | } | ||
| 67 | 1 | ++it; | |
| 68 | #if 0 | ||
| 69 | // pct_string_view can never have invalid pct-encodings | ||
| 70 | if(it == end) | ||
| 71 | goto invalid; | ||
| 72 | #endif | ||
| 73 | 1 | auto d0 = urls::grammar::hexdig_value(*it++); | |
| 74 | #if 0 | ||
| 75 | // pct_string_view can never have invalid pct-encodings | ||
| 76 | if( d0 < 0 || | ||
| 77 | it == end) | ||
| 78 | goto invalid; | ||
| 79 | #endif | ||
| 80 | 1 | auto d1 = urls::grammar::hexdig_value(*it++); | |
| 81 | #if 0 | ||
| 82 | // pct_string_view can never have invalid pct-encodings | ||
| 83 | if(d1 < 0) | ||
| 84 | goto invalid; | ||
| 85 | #endif | ||
| 86 |
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1 | result.push_back(d0 * 16 + d1); |
| 87 | 261 | } | |
| 88 | 232 | return result; | |
| 89 | #if 0 | ||
| 90 | invalid: | ||
| 91 | // can't get here, as received a pct_string_view | ||
| 92 | detail::throw_invalid_argument(); | ||
| 93 | #endif | ||
| 94 | ✗ | } | |
| 95 | |||
| 96 | // decode all percent escapes except slashes '/' and '\' | ||
| 97 | std::string | ||
| 98 | 58 | pct_decode_path( | |
| 99 | urls::pct_string_view s) | ||
| 100 | { | ||
| 101 | 58 | std::string result; | |
| 102 | 58 | core::string_view sv(s); | |
| 103 |
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58 | result.reserve(s.size()); |
| 104 | 58 | auto it = sv.data(); | |
| 105 | 58 | auto const end = it + sv.size(); | |
| 106 | for(;;) | ||
| 107 | { | ||
| 108 |
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227 | if(it == end) |
| 109 | 58 | break; | |
| 110 |
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169 | if(*it != '%') |
| 111 | { | ||
| 112 |
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167 | result.push_back(*it++); |
| 113 | 167 | continue; | |
| 114 | } | ||
| 115 | 2 | ++it; | |
| 116 | #if 0 | ||
| 117 | // pct_string_view can never have invalid pct-encodings | ||
| 118 | if(it == end) | ||
| 119 | goto invalid; | ||
| 120 | #endif | ||
| 121 | 2 | auto d0 = urls::grammar::hexdig_value(*it++); | |
| 122 | #if 0 | ||
| 123 | // pct_string_view can never have invalid pct-encodings | ||
| 124 | if( d0 < 0 || | ||
| 125 | it == end) | ||
| 126 | goto invalid; | ||
| 127 | #endif | ||
| 128 | 2 | auto d1 = urls::grammar::hexdig_value(*it++); | |
| 129 | #if 0 | ||
| 130 | // pct_string_view can never have invalid pct-encodings | ||
| 131 | if(d1 < 0) | ||
| 132 | goto invalid; | ||
| 133 | #endif | ||
| 134 | 2 | char c = d0 * 16 + d1; | |
| 135 |
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2 | if( c != '/' && |
| 136 | c != '\\') | ||
| 137 | { | ||
| 138 |
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1 | result.push_back(c); |
| 139 | 1 | continue; | |
| 140 | } | ||
| 141 |
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1 | result.append(it - 3, 3); |
| 142 | 169 | } | |
| 143 | 116 | return result; | |
| 144 | #if 0 | ||
| 145 | invalid: | ||
| 146 | // can't get here, as received a pct_string_view | ||
| 147 | detail::throw_invalid_argument(); | ||
| 148 | #endif | ||
| 149 | ✗ | } | |
| 150 | |||
| 151 | } // detail | ||
| 152 | } // http | ||
| 153 | } // boost | ||
| 154 |