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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_ | |
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