1 /*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "core/fileapi/File.h"
28
29 #include "platform/FileMetadata.h"
30 #include "platform/MIMETypeRegistry.h"
31 #include "public/platform/Platform.h"
32 #include "public/platform/WebFileUtilities.h"
33 #include "wtf/CurrentTime.h"
34 #include "wtf/DateMath.h"
35
36 namespace WebCore {
37
getContentTypeFromFileName(const String & name,File::ContentTypeLookupPolicy policy)38 static String getContentTypeFromFileName(const String& name, File::ContentTypeLookupPolicy policy)
39 {
40 String type;
41 int index = name.reverseFind('.');
42 if (index != -1) {
43 if (policy == File::WellKnownContentTypes)
44 type = MIMETypeRegistry::getWellKnownMIMETypeForExtension(name.substring(index + 1));
45 else {
46 ASSERT(policy == File::AllContentTypes);
47 type = MIMETypeRegistry::getMIMETypeForExtension(name.substring(index + 1));
48 }
49 }
50 return type;
51 }
52
createBlobDataForFileWithType(const String & path,const String & contentType)53 static PassOwnPtr<BlobData> createBlobDataForFileWithType(const String& path, const String& contentType)
54 {
55 OwnPtr<BlobData> blobData = BlobData::create();
56 blobData->setContentType(contentType);
57 blobData->appendFile(path);
58 return blobData.release();
59 }
60
createBlobDataForFile(const String & path,File::ContentTypeLookupPolicy policy)61 static PassOwnPtr<BlobData> createBlobDataForFile(const String& path, File::ContentTypeLookupPolicy policy)
62 {
63 return createBlobDataForFileWithType(path, getContentTypeFromFileName(path, policy));
64 }
65
createBlobDataForFileWithName(const String & path,const String & fileSystemName,File::ContentTypeLookupPolicy policy)66 static PassOwnPtr<BlobData> createBlobDataForFileWithName(const String& path, const String& fileSystemName, File::ContentTypeLookupPolicy policy)
67 {
68 return createBlobDataForFileWithType(path, getContentTypeFromFileName(fileSystemName, policy));
69 }
70
createBlobDataForFileWithMetadata(const String & fileSystemName,const FileMetadata & metadata)71 static PassOwnPtr<BlobData> createBlobDataForFileWithMetadata(const String& fileSystemName, const FileMetadata& metadata)
72 {
73 OwnPtr<BlobData> blobData = BlobData::create();
74 blobData->setContentType(getContentTypeFromFileName(fileSystemName, File::WellKnownContentTypes));
75 blobData->appendFile(metadata.platformPath, 0, metadata.length, metadata.modificationTime);
76 return blobData.release();
77 }
78
createBlobDataForFileSystemURL(const KURL & fileSystemURL,const FileMetadata & metadata)79 static PassOwnPtr<BlobData> createBlobDataForFileSystemURL(const KURL& fileSystemURL, const FileMetadata& metadata)
80 {
81 OwnPtr<BlobData> blobData = BlobData::create();
82 blobData->setContentType(getContentTypeFromFileName(fileSystemURL.path(), File::WellKnownContentTypes));
83 blobData->appendFileSystemURL(fileSystemURL, 0, metadata.length, metadata.modificationTime);
84 return blobData.release();
85 }
86
createWithRelativePath(const String & path,const String & relativePath)87 PassRefPtr<File> File::createWithRelativePath(const String& path, const String& relativePath)
88 {
89 RefPtr<File> file = adoptRef(new File(path, AllContentTypes));
90 file->m_relativePath = relativePath;
91 return file.release();
92 }
93
File(const String & path,ContentTypeLookupPolicy policy)94 File::File(const String& path, ContentTypeLookupPolicy policy)
95 : Blob(BlobDataHandle::create(createBlobDataForFile(path, policy), -1))
96 , m_hasBackingFile(true)
97 , m_path(path)
98 , m_name(blink::Platform::current()->fileUtilities()->baseName(path))
99 , m_snapshotSize(-1)
100 , m_snapshotModificationTime(invalidFileTime())
101 {
102 ScriptWrappable::init(this);
103 }
104
File(const String & path,const String & name,ContentTypeLookupPolicy policy)105 File::File(const String& path, const String& name, ContentTypeLookupPolicy policy)
106 : Blob(BlobDataHandle::create(createBlobDataForFileWithName(path, name, policy), -1))
107 , m_hasBackingFile(true)
108 , m_path(path)
109 , m_name(name)
110 , m_snapshotSize(-1)
111 , m_snapshotModificationTime(invalidFileTime())
112 {
113 ScriptWrappable::init(this);
114 }
115
File(const String & path,const String & name,const String & relativePath,bool hasSnaphotData,uint64_t size,double lastModified,PassRefPtr<BlobDataHandle> blobDataHandle)116 File::File(const String& path, const String& name, const String& relativePath, bool hasSnaphotData, uint64_t size, double lastModified, PassRefPtr<BlobDataHandle> blobDataHandle)
117 : Blob(blobDataHandle)
118 , m_hasBackingFile(!path.isEmpty() || !relativePath.isEmpty())
119 , m_path(path)
120 , m_name(name)
121 , m_snapshotSize(hasSnaphotData ? static_cast<long long>(size) : -1)
122 , m_snapshotModificationTime(hasSnaphotData ? lastModified : invalidFileTime())
123 , m_relativePath(relativePath)
124 {
125 ScriptWrappable::init(this);
126 }
127
File(const String & name,double modificationTime,PassRefPtr<BlobDataHandle> blobDataHandle)128 File::File(const String& name, double modificationTime, PassRefPtr<BlobDataHandle> blobDataHandle)
129 : Blob(blobDataHandle)
130 , m_hasBackingFile(false)
131 , m_name(name)
132 , m_snapshotSize(Blob::size())
133 , m_snapshotModificationTime(modificationTime)
134 {
135 ScriptWrappable::init(this);
136 }
137
File(const String & name,const FileMetadata & metadata)138 File::File(const String& name, const FileMetadata& metadata)
139 : Blob(BlobDataHandle::create(createBlobDataForFileWithMetadata(name, metadata), metadata.length))
140 , m_hasBackingFile(true)
141 , m_path(metadata.platformPath)
142 , m_name(name)
143 , m_snapshotSize(metadata.length)
144 , m_snapshotModificationTime(metadata.modificationTime)
145 {
146 ScriptWrappable::init(this);
147 }
148
File(const KURL & fileSystemURL,const FileMetadata & metadata)149 File::File(const KURL& fileSystemURL, const FileMetadata& metadata)
150 : Blob(BlobDataHandle::create(createBlobDataForFileSystemURL(fileSystemURL, metadata), metadata.length))
151 , m_hasBackingFile(true)
152 , m_fileSystemURL(fileSystemURL)
153 , m_snapshotSize(metadata.length)
154 , m_snapshotModificationTime(metadata.modificationTime)
155 {
156 ScriptWrappable::init(this);
157 }
158
lastModifiedDate() const159 double File::lastModifiedDate() const
160 {
161 if (hasValidSnapshotMetadata() && isValidFileTime(m_snapshotModificationTime))
162 return m_snapshotModificationTime * msPerSecond;
163
164 time_t modificationTime;
165 if (getFileModificationTime(m_path, modificationTime) && isValidFileTime(modificationTime))
166 return modificationTime * msPerSecond;
167
168 return currentTime() * msPerSecond;
169 }
170
size() const171 unsigned long long File::size() const
172 {
173 if (hasValidSnapshotMetadata())
174 return m_snapshotSize;
175
176 // FIXME: JavaScript cannot represent sizes as large as unsigned long long, we need to
177 // come up with an exception to throw if file size is not representable.
178 long long size;
179 if (!getFileSize(m_path, size))
180 return 0;
181 return static_cast<unsigned long long>(size);
182 }
183
captureSnapshot(long long & snapshotSize,double & snapshotModificationTime) const184 void File::captureSnapshot(long long& snapshotSize, double& snapshotModificationTime) const
185 {
186 if (hasValidSnapshotMetadata()) {
187 snapshotSize = m_snapshotSize;
188 snapshotModificationTime = m_snapshotModificationTime;
189 return;
190 }
191
192 // Obtains a snapshot of the file by capturing its current size and modification time. This is used when we slice a file for the first time.
193 // If we fail to retrieve the size or modification time, probably due to that the file has been deleted, 0 size is returned.
194 FileMetadata metadata;
195 if (!getFileMetadata(m_path, metadata)) {
196 snapshotSize = 0;
197 snapshotModificationTime = invalidFileTime();
198 return;
199 }
200
201 snapshotSize = metadata.length;
202 snapshotModificationTime = metadata.modificationTime;
203 }
204
205 } // namespace WebCore
206