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// Copyright 2017 The Chromium Authors. All rights reserved.
// 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_PARSED_CONTENT_HEADER_FIELD_PARAMETERS_H_
#define 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/allocator.h"
#include "third_party/blink/renderer/platform/wtf/optional.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class HeaderFieldTokenizer;
// Parses content header field parameters as specified in RFC2045 and stores
// them. It is used internally by ParsedContent* classes.
// FIXME: add support for comments.
class PLATFORM_EXPORT ParsedContentHeaderFieldParameters final {
DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
public:
struct NameValue {
NameValue(String name, String value) : name(name), value(value) {}
String name;
String value;
};
using NameValuePairs = Vector<NameValue>;
using const_iterator = NameValuePairs::const_iterator;
using reverse_const_iterator = NameValuePairs::const_reverse_iterator;
// When |Relaxed| is specified, the parser parses parameter values in a sloppy
// manner, i.e., only ';' and '"' are treated as special characters.
// See https://chromiumcodereview.appspot.com/23043002.
enum class Mode {
kNormal,
kRelaxed,
};
// We use base::Optional instead of WTF::Optional which requires its content
// type to be fully defined. They are essentially same, so uses of this class
// can (and should) use WTF::Optional to store the returned value.
static base::Optional<ParsedContentHeaderFieldParameters> Parse(
HeaderFieldTokenizer,
Mode);
// Note that in the case of multiple values for the same name, the last value
// is returned.
String ParameterValueForName(const String&) const;
size_t ParameterCount() const;
bool HasDuplicatedNames() const;
const_iterator begin() const { return parameters_.begin(); }
const_iterator end() const { return parameters_.end(); }
reverse_const_iterator rbegin() const { return parameters_.rbegin(); }
reverse_const_iterator rend() const { return parameters_.rend(); }
private:
explicit ParsedContentHeaderFieldParameters(NameValuePairs parameters)
: parameters_(std::move(parameters)) {}
NameValuePairs parameters_;
};
} // namespace blink
#endif
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