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1 // Copyright (c) 2012 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 "content/common/fileapi/webblobregistry_impl.h" | |
6 | |
7 #include "base/memory/ref_counted.h" | |
8 #include "base/message_loop.h" | |
9 #include "base/shared_memory.h" | |
10 #include "content/common/child_thread.h" | |
11 #include "content/common/fileapi/webblob_messages.h" | |
12 #include "content/common/thread_safe_sender.h" | |
13 #include "third_party/WebKit/Source/Platform/chromium/public/WebBlobData.h" | |
14 #include "third_party/WebKit/Source/Platform/chromium/public/WebString.h" | |
15 #include "third_party/WebKit/Source/Platform/chromium/public/WebURL.h" | |
16 #include "webkit/base/file_path_string_conversions.h" | |
17 #include "webkit/blob/blob_data.h" | |
18 | |
19 using WebKit::WebBlobData; | |
20 using WebKit::WebString; | |
21 using WebKit::WebURL; | |
22 | |
23 namespace content { | |
24 | |
25 WebBlobRegistryImpl::WebBlobRegistryImpl(ThreadSafeSender* sender) | |
26 : sender_(sender) { | |
27 } | |
28 | |
29 WebBlobRegistryImpl::~WebBlobRegistryImpl() { | |
30 } | |
31 | |
32 void WebBlobRegistryImpl::registerBlobURL( | |
33 const WebURL& url, WebBlobData& data) { | |
34 DCHECK(ChildThread::current()->message_loop() == | |
35 base::MessageLoop::current()); | |
36 const size_t kLargeThresholdBytes = 250 * 1024; | |
37 const size_t kMaxSharedMemoryBytes = 10 * 1024 * 1024; | |
38 | |
39 sender_->Send(new BlobHostMsg_StartBuildingBlob(url)); | |
40 size_t i = 0; | |
41 WebBlobData::Item data_item; | |
42 while (data.itemAt(i++, data_item)) { | |
43 webkit_blob::BlobData::Item item; | |
44 switch (data_item.type) { | |
45 case WebBlobData::Item::TypeData: { | |
46 // WebBlobData does not allow partial data items. | |
47 DCHECK(!data_item.offset && data_item.length == -1); | |
48 if (data_item.data.size() == 0) | |
49 break; | |
50 if (data_item.data.size() < kLargeThresholdBytes) { | |
51 item.SetToBytes(data_item.data.data(), data_item.data.size()); | |
52 sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item)); | |
53 } else { | |
54 // We handle larger amounts of data via SharedMemory instead of | |
55 // writing it directly to the IPC channel. | |
56 size_t data_size = data_item.data.size(); | |
57 const char* data_ptr = data_item.data.data(); | |
58 size_t shared_memory_size = std::min( | |
59 data_size, kMaxSharedMemoryBytes); | |
60 scoped_ptr<base::SharedMemory> shared_memory( | |
61 ChildThread::AllocateSharedMemory(shared_memory_size, sender_)); | |
62 CHECK(shared_memory.get()); | |
63 while (data_size) { | |
64 size_t chunk_size = std::min(data_size, shared_memory_size); | |
65 memcpy(shared_memory->memory(), data_ptr, chunk_size); | |
66 sender_->Send(new BlobHostMsg_SyncAppendSharedMemory( | |
67 url, shared_memory->handle(), chunk_size)); | |
68 data_size -= chunk_size; | |
69 data_ptr += chunk_size; | |
70 } | |
71 } | |
72 break; | |
73 } | |
74 case WebBlobData::Item::TypeFile: | |
75 if (data_item.length) { | |
76 item.SetToFilePathRange( | |
77 webkit_base::WebStringToFilePath(data_item.filePath), | |
78 static_cast<uint64>(data_item.offset), | |
79 static_cast<uint64>(data_item.length), | |
80 base::Time::FromDoubleT(data_item.expectedModificationTime)); | |
81 sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item)); | |
82 } | |
83 break; | |
84 case WebBlobData::Item::TypeBlob: | |
85 if (data_item.length) { | |
86 item.SetToBlobUrlRange( | |
87 data_item.blobURL, | |
88 static_cast<uint64>(data_item.offset), | |
89 static_cast<uint64>(data_item.length)); | |
90 sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item)); | |
91 } | |
92 break; | |
93 case WebBlobData::Item::TypeURL: | |
94 if (data_item.length) { | |
95 // We only support filesystem URL as of now. | |
96 DCHECK(GURL(data_item.url).SchemeIsFileSystem()); | |
97 item.SetToFileSystemUrlRange( | |
98 data_item.url, | |
99 static_cast<uint64>(data_item.offset), | |
100 static_cast<uint64>(data_item.length), | |
101 base::Time::FromDoubleT(data_item.expectedModificationTime)); | |
102 sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item)); | |
103 } | |
104 break; | |
105 default: | |
106 NOTREACHED(); | |
107 } | |
108 } | |
109 sender_->Send(new BlobHostMsg_FinishBuildingBlob( | |
110 url, data.contentType().utf8().data())); | |
111 } | |
112 | |
113 void WebBlobRegistryImpl::registerBlobURL( | |
114 const WebURL& url, const WebURL& src_url) { | |
115 DCHECK(ChildThread::current()->message_loop() == | |
116 base::MessageLoop::current()); | |
117 sender_->Send(new BlobHostMsg_CloneBlob(url, src_url)); | |
118 } | |
119 | |
120 void WebBlobRegistryImpl::unregisterBlobURL(const WebURL& url) { | |
121 DCHECK(ChildThread::current()->message_loop() == | |
122 base::MessageLoop::current()); | |
123 sender_->Send(new BlobHostMsg_RemoveBlob(url)); | |
124 } | |
125 | |
126 } // namespace content | |
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