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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_HTTP_HTTP_BYTE_RANGE_H_
#define NET_HTTP_HTTP_BYTE_RANGE_H_
#include <stdint.h>
#include <string>
#include "net/base/net_export.h"
namespace net {
// A container class that represents a "range" specified for range request
// specified by RFC 7233 Section 2.1.
// https://tools.ietf.org/html/rfc7233#section-2.1
class NET_EXPORT HttpByteRange {
public:
HttpByteRange();
// Convenience constructors.
static HttpByteRange Bounded(int64_t first_byte_position,
int64_t last_byte_position);
static HttpByteRange RightUnbounded(int64_t first_byte_position);
static HttpByteRange Suffix(int64_t suffix_length);
// Since this class is POD, we use constructor, assignment operator
// and destructor provided by compiler.
int64_t first_byte_position() const { return first_byte_position_; }
void set_first_byte_position(int64_t value) { first_byte_position_ = value; }
int64_t last_byte_position() const { return last_byte_position_; }
void set_last_byte_position(int64_t value) { last_byte_position_ = value; }
int64_t suffix_length() const { return suffix_length_; }
void set_suffix_length(int64_t value) { suffix_length_ = value; }
// Returns true if this is a suffix byte range.
bool IsSuffixByteRange() const;
// Returns true if the first byte position is specified in this request.
bool HasFirstBytePosition() const;
// Returns true if the last byte position is specified in this request.
bool HasLastBytePosition() const;
// Returns true if this range is valid.
bool IsValid() const;
// Gets the header string, e.g. "bytes=0-100", "bytes=100-", "bytes=-100".
// Assumes range is valid.
std::string GetHeaderValue() const;
// A method that when given the size in bytes of a file, adjust the internal
// |first_byte_position_| and |last_byte_position_| values according to the
// range specified by this object. If the range specified is invalid with
// regard to the size or |size| is negative, returns false and there will be
// no side effect.
// Returns false if this method is called more than once and there will be
// no side effect.
bool ComputeBounds(int64_t size);
private:
int64_t first_byte_position_;
int64_t last_byte_position_;
int64_t suffix_length_;
bool has_computed_bounds_ = false;
};
} // namespace net
#endif // NET_HTTP_HTTP_BYTE_RANGE_H_
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