1/*
2 * Copyright 2017 The Chromium Authors. All rights reserved.
3 * Copyright (C) 2018 Akamai Technologies Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <wtf/text/WTFString.h>
30
31namespace WebCore {
32
33// Parses header fields into tokens, quoted strings and separators.
34// Commonly used by ParsedContent* classes.
35class HeaderFieldTokenizer {
36
37public:
38 explicit HeaderFieldTokenizer(const String&);
39
40 // Try to parse a separator character, a token or either a token or a quoted
41 // string from the |header_field| input. Return |true| on success. Return
42 // |false| if the separator character, the token or the quoted string is
43 // missing or invalid.
44 bool consume(UChar);
45 String consumeToken();
46 String consumeTokenOrQuotedString();
47
48 // Consume all characters before (but excluding) any of the characters from
49 // the Vector parameter are found.
50 // Because we potentially have to iterate through the entire Vector for each
51 // character of the base string, the Vector should be small (< 3 members).
52 void consumeBeforeAnyCharMatch(const Vector<UChar>&);
53
54 bool isConsumed() const { return m_index >= m_input.length(); }
55
56private:
57 String consumeQuotedString();
58 void skipSpaces();
59
60 unsigned m_index = 0;
61 const String m_input;
62};
63
64} // namespace WebCore
65