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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/net/referrer.h" | 5 #include "chrome/browser/net/referrer.h" |
6 | 6 |
7 #include <limits.h> | 7 #include <limits.h> |
8 | 8 |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
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113 erase(discarded_urls[i]); | 113 erase(discarded_urls[i]); |
114 return size() > 0; | 114 return size() > 0; |
115 } | 115 } |
116 | 116 |
117 bool ReferrerValue::Trim(double reduce_rate, double threshold) { | 117 bool ReferrerValue::Trim(double reduce_rate, double threshold) { |
118 subresource_use_rate_ *= reduce_rate; | 118 subresource_use_rate_ *= reduce_rate; |
119 return subresource_use_rate_ > threshold; | 119 return subresource_use_rate_ > threshold; |
120 } | 120 } |
121 | 121 |
122 | 122 |
123 void Referrer::Deserialize(const Value& value) { | 123 void Referrer::Deserialize(const base::Value& value) { |
124 if (value.GetType() != Value::TYPE_LIST) | 124 if (value.GetType() != base::Value::TYPE_LIST) |
125 return; | 125 return; |
126 const ListValue* subresource_list(static_cast<const ListValue*>(&value)); | 126 const base::ListValue* subresource_list( |
| 127 static_cast<const base::ListValue*>(&value)); |
127 size_t index = 0; // Bounds checking is done by subresource_list->Get*(). | 128 size_t index = 0; // Bounds checking is done by subresource_list->Get*(). |
128 while (true) { | 129 while (true) { |
129 std::string url_spec; | 130 std::string url_spec; |
130 if (!subresource_list->GetString(index++, &url_spec)) | 131 if (!subresource_list->GetString(index++, &url_spec)) |
131 return; | 132 return; |
132 double rate; | 133 double rate; |
133 if (!subresource_list->GetDouble(index++, &rate)) | 134 if (!subresource_list->GetDouble(index++, &rate)) |
134 return; | 135 return; |
135 | 136 |
136 GURL url(url_spec); | 137 GURL url(url_spec); |
137 // TODO(jar): We could be more direct, and change birth date or similar to | 138 // TODO(jar): We could be more direct, and change birth date or similar to |
138 // show that this is a resurrected value we're adding in. I'm not yet sure | 139 // show that this is a resurrected value we're adding in. I'm not yet sure |
139 // of how best to optimize the learning and pruning (Trim) algorithm at this | 140 // of how best to optimize the learning and pruning (Trim) algorithm at this |
140 // level, so for now, we just suggest subresources, which leaves them all | 141 // level, so for now, we just suggest subresources, which leaves them all |
141 // with the same birth date (typically start of process). | 142 // with the same birth date (typically start of process). |
142 SuggestHost(url); | 143 SuggestHost(url); |
143 (*this)[url].SetSubresourceUseRate(rate); | 144 (*this)[url].SetSubresourceUseRate(rate); |
144 } | 145 } |
145 } | 146 } |
146 | 147 |
147 Value* Referrer::Serialize() const { | 148 base::Value* Referrer::Serialize() const { |
148 base::ListValue* subresource_list(new base::ListValue); | 149 base::ListValue* subresource_list(new base::ListValue); |
149 for (const_iterator it = begin(); it != end(); ++it) { | 150 for (const_iterator it = begin(); it != end(); ++it) { |
150 base::StringValue* url_spec(new base::StringValue(it->first.spec())); | 151 base::StringValue* url_spec(new base::StringValue(it->first.spec())); |
151 base::FundamentalValue* rate(new base::FundamentalValue( | 152 base::FundamentalValue* rate(new base::FundamentalValue( |
152 it->second.subresource_use_rate())); | 153 it->second.subresource_use_rate())); |
153 | 154 |
154 subresource_list->Append(url_spec); | 155 subresource_list->Append(url_spec); |
155 subresource_list->Append(rate); | 156 subresource_list->Append(rate); |
156 } | 157 } |
157 return subresource_list; | 158 return subresource_list; |
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176 | 177 |
177 void ReferrerValue::ReferrerWasObserved() { | 178 void ReferrerValue::ReferrerWasObserved() { |
178 subresource_use_rate_ *= kWeightingForOldConnectsExpectedValue; | 179 subresource_use_rate_ *= kWeightingForOldConnectsExpectedValue; |
179 // Note: the use rate is temporarilly possibly incorect, as we need to find | 180 // Note: the use rate is temporarilly possibly incorect, as we need to find |
180 // out if we really end up connecting. This will happen in a few hundred | 181 // out if we really end up connecting. This will happen in a few hundred |
181 // milliseconds (when content arrives, etc.). | 182 // milliseconds (when content arrives, etc.). |
182 // Value of subresource_use_rate_ should be sampled before this call. | 183 // Value of subresource_use_rate_ should be sampled before this call. |
183 } | 184 } |
184 | 185 |
185 } // namespace chrome_browser_net | 186 } // namespace chrome_browser_net |
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