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107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <AK/StringUtils.h>
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#include <AK/URLParser.h>
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namespace AK {
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static bool is_ascii_hex_digit(u8 ch)
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{
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return (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
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}
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String urldecode(const StringView& input)
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{
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size_t cursor = 0;
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auto peek = [&](size_t offset = 0) -> u8 {
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if (cursor + offset >= input.length())
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return 0;
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return input[cursor + offset];
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};
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auto consume = [&] {
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return input[cursor++];
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};
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StringBuilder builder;
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while (cursor < input.length()) {
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if (peek() != '%') {
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builder.append(consume());
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continue;
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}
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if (!is_ascii_hex_digit(peek(1)) && !is_ascii_hex_digit(peek(2))) {
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builder.append(consume());
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continue;
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}
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auto byte_point = StringUtils::convert_to_uint_from_hex(input.substring_view(cursor + 1, 2));
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builder.append(byte_point.value());
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consume();
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consume();
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consume();
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}
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return builder.to_string();
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}
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static inline bool in_c0_control_set(u32 c)
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{
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return c <= 0x1f || c > '~';
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}
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static inline bool in_fragment_set(u32 c)
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{
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return in_c0_control_set(c) || c == ' ' || c == '"' || c == '<' || c == '>' || c == '`';
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}
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static inline bool in_path_set(u32 c)
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{
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return in_fragment_set(c) || c == '#' || c == '?' || c == '{' || c == '}';
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}
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static inline bool in_userinfo_set(u32 c)
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{
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return in_path_set(c) || c == '/' || c == ':' || c == ';' || c == '=' || c == '@' || (c >= '[' && c <= '^') || c == '|';
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}
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String urlencode(const StringView& input)
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{
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StringBuilder builder;
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for (char ch : input) {
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if (in_userinfo_set((u8)ch)) {
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builder.append('%');
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builder.appendff("{:02X}", ch);
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} else {
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builder.append(ch);
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}
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}
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return builder.to_string();
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}
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}
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