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| 1 // Copyright (c) 2009 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 #include <algorithm> | |
| 6 | |
| 7 #include "base/format_macros.h" | |
| 8 #include "base/logging.h" | |
| 9 #include "base/strings/stringprintf.h" | |
| 10 #include "net/http/http_byte_range.h" | |
| 11 | |
| 12 namespace { | |
| 13 | |
| 14 const int64 kPositionNotSpecified = -1; | |
| 15 | |
| 16 } // namespace | |
| 17 | |
| 18 namespace net { | |
| 19 | |
| 20 HttpByteRange::HttpByteRange() | |
| 21 : first_byte_position_(kPositionNotSpecified), | |
| 22 last_byte_position_(kPositionNotSpecified), | |
| 23 suffix_length_(kPositionNotSpecified), | |
| 24 has_computed_bounds_(false) { | |
| 25 } | |
| 26 | |
| 27 // static | |
| 28 HttpByteRange HttpByteRange::Bounded(int64 first_byte_position, | |
| 29 int64 last_byte_position) { | |
| 30 HttpByteRange range; | |
| 31 range.set_first_byte_position(first_byte_position); | |
| 32 range.set_last_byte_position(last_byte_position); | |
| 33 return range; | |
| 34 } | |
| 35 | |
| 36 // static | |
| 37 HttpByteRange HttpByteRange::RightUnbounded(int64 first_byte_position) { | |
| 38 HttpByteRange range; | |
| 39 range.set_first_byte_position(first_byte_position); | |
| 40 return range; | |
| 41 } | |
| 42 | |
| 43 // static | |
| 44 HttpByteRange HttpByteRange::Suffix(int64 suffix_length) { | |
| 45 HttpByteRange range; | |
| 46 range.set_suffix_length(suffix_length); | |
| 47 return range; | |
| 48 } | |
| 49 | |
| 50 bool HttpByteRange::IsSuffixByteRange() const { | |
| 51 return suffix_length_ != kPositionNotSpecified; | |
| 52 } | |
| 53 | |
| 54 bool HttpByteRange::HasFirstBytePosition() const { | |
| 55 return first_byte_position_ != kPositionNotSpecified; | |
| 56 } | |
| 57 | |
| 58 bool HttpByteRange::HasLastBytePosition() const { | |
| 59 return last_byte_position_ != kPositionNotSpecified; | |
| 60 } | |
| 61 | |
| 62 bool HttpByteRange::IsValid() const { | |
| 63 if (suffix_length_ > 0) | |
| 64 return true; | |
| 65 return (first_byte_position_ >= 0 && | |
| 66 (last_byte_position_ == kPositionNotSpecified || | |
| 67 last_byte_position_ >= first_byte_position_)); | |
| 68 } | |
| 69 | |
| 70 std::string HttpByteRange::GetHeaderValue() const { | |
| 71 DCHECK(IsValid()); | |
| 72 | |
| 73 if (IsSuffixByteRange()) | |
| 74 return base::StringPrintf("bytes=-%" PRId64, suffix_length()); | |
| 75 | |
| 76 DCHECK(HasFirstBytePosition()); | |
| 77 | |
| 78 if (!HasLastBytePosition()) | |
| 79 return base::StringPrintf("bytes=%" PRId64 "-", first_byte_position()); | |
| 80 | |
| 81 return base::StringPrintf("bytes=%" PRId64 "-%" PRId64, | |
| 82 first_byte_position(), last_byte_position()); | |
| 83 } | |
| 84 | |
| 85 bool HttpByteRange::ComputeBounds(int64 size) { | |
| 86 if (size < 0) | |
| 87 return false; | |
| 88 if (has_computed_bounds_) | |
| 89 return false; | |
| 90 has_computed_bounds_ = true; | |
| 91 | |
| 92 // Empty values. | |
| 93 if (!HasFirstBytePosition() && | |
| 94 !HasLastBytePosition() && | |
| 95 !IsSuffixByteRange()) { | |
| 96 first_byte_position_ = 0; | |
| 97 last_byte_position_ = size - 1; | |
| 98 return true; | |
| 99 } | |
| 100 if (!IsValid()) | |
| 101 return false; | |
| 102 if (IsSuffixByteRange()) { | |
| 103 first_byte_position_ = size - std::min(size, suffix_length_); | |
| 104 last_byte_position_ = size - 1; | |
| 105 return true; | |
| 106 } | |
| 107 if (first_byte_position_ < size) { | |
| 108 if (HasLastBytePosition()) | |
| 109 last_byte_position_ = std::min(size - 1, last_byte_position_); | |
| 110 else | |
| 111 last_byte_position_ = size - 1; | |
| 112 return true; | |
| 113 } | |
| 114 return false; | |
| 115 } | |
| 116 | |
| 117 } // namespace net | |
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Chromium Code Reviews
Issue 992733002:
Remove //net (except for Android test stuff) and sdch (Closed)
Base URL: git@github.com:domokit/mojo.git@master