1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_HTTP_HTTP_BYTE_RANGE_H_ 6 #define NET_HTTP_HTTP_BYTE_RANGE_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "net/base/net_export.h" 12 13 namespace net { 14 15 // A container class that represents a "range" specified for range request 16 // specified by RFC 7233 Section 2.1. 17 // https://tools.ietf.org/html/rfc7233#section-2.1 18 class NET_EXPORT HttpByteRange { 19 public: 20 HttpByteRange(); 21 22 // Convenience constructors. 23 static HttpByteRange Bounded(int64 first_byte_position, 24 int64 last_byte_position); 25 static HttpByteRange RightUnbounded(int64 first_byte_position); 26 static HttpByteRange Suffix(int64 suffix_length); 27 28 // Since this class is POD, we use constructor, assignment operator 29 // and destructor provided by compiler. 30 int64 first_byte_position() const { return first_byte_position_; } 31 void set_first_byte_position(int64 value) { first_byte_position_ = value; } 32 33 int64 last_byte_position() const { return last_byte_position_; } 34 void set_last_byte_position(int64 value) { last_byte_position_ = value; } 35 36 int64 suffix_length() const { return suffix_length_; } 37 void set_suffix_length(int64 value) { suffix_length_ = value; } 38 39 // Returns true if this is a suffix byte range. 40 bool IsSuffixByteRange() const; 41 // Returns true if the first byte position is specified in this request. 42 bool HasFirstBytePosition() const; 43 // Returns true if the last byte position is specified in this request. 44 bool HasLastBytePosition() const; 45 46 // Returns true if this range is valid. 47 bool IsValid() const; 48 49 // Gets the header string, e.g. "bytes=0-100", "bytes=100-", "bytes=-100". 50 // Assumes range is valid. 51 std::string GetHeaderValue() const; 52 53 // A method that when given the size in bytes of a file, adjust the internal 54 // |first_byte_position_| and |last_byte_position_| values according to the 55 // range specified by this object. If the range specified is invalid with 56 // regard to the size or |size| is negative, returns false and there will be 57 // no side effect. 58 // Returns false if this method is called more than once and there will be 59 // no side effect. 60 bool ComputeBounds(int64 size); 61 62 private: 63 int64 first_byte_position_; 64 int64 last_byte_position_; 65 int64 suffix_length_; 66 bool has_computed_bounds_; 67 }; 68 69 } // namespace net 70 71 #endif // NET_HTTP_HTTP_BYTE_RANGE_H_ 72
