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- // Copyright (c) 2011 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 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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