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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_NETWORK_HEADER_FIELD_TOKENIZER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_NETWORK_HEADER_FIELD_TOKENIZER_H_
#include "third_party/blink/renderer/platform/network/parsed_content_header_field_parameters.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
// Parses header fields into tokens, quoted strings and separators.
// Commonly used by ParsedContent* classes.
class PLATFORM_EXPORT HeaderFieldTokenizer final {
STACK_ALLOCATED();
public:
using Mode = ParsedContentHeaderFieldParameters::Mode;
explicit HeaderFieldTokenizer(const String& header_field);
HeaderFieldTokenizer(HeaderFieldTokenizer&&);
// Try to parse a separator character, a token or either a token or a quoted
// string from the |header_field| input. Return |true| on success. Return
// |false| if the separator character, the token or the quoted string is
// missing or invalid.
bool Consume(char);
bool ConsumeToken(Mode, StringView& output);
bool ConsumeTokenOrQuotedString(Mode, String& output);
// Consume all characters before (but excluding) any of the characters from
// the Vector parameter are found.
// Because we potentially have to iterate through the entire Vector for each
// character of the base string, the Vector should be small (< 3 members).
void ConsumeBeforeAnyCharMatch(Vector<LChar>);
unsigned Index() const { return index_; }
bool IsConsumed() const { return index_ >= input_.length(); }
private:
bool ConsumeQuotedString(String& output);
void SkipOptionalWhitespace();
unsigned index_;
const String input_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_NETWORK_HEADER_FIELD_TOKENIZER_H_
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