mirror of
https://github.com/SerenityOS/serenity
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1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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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, const StringView& exclude)
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{
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StringBuilder builder;
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for (unsigned char ch : input) {
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if (in_userinfo_set((u8)ch) && !exclude.contains(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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