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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 // For loading files, we make use of overlapped i/o to ensure that reading from | 5 // For loading files, we make use of overlapped i/o to ensure that reading from |
| 6 // the filesystem (e.g., a network filesystem) does not block the calling | 6 // the filesystem (e.g., a network filesystem) does not block the calling |
| 7 // thread. An alternative approach would be to use a background thread or pool | 7 // thread. An alternative approach would be to use a background thread or pool |
| 8 // of threads, but it seems better to leverage the operating system's ability | 8 // of threads, but it seems better to leverage the operating system's ability |
| 9 // to do background file reads for us. | 9 // to do background file reads for us. |
| 10 // | 10 // |
| 11 // Since overlapped reads require a 'static' buffer for the duration of the | 11 // Since overlapped reads require a 'static' buffer for the duration of the |
| 12 // asynchronous read, the URLRequestFileJob keeps a buffer as a member var. In | 12 // asynchronous read, the URLRequestFileJob keeps a buffer as a member var. In |
| 13 // URLRequestFileJob::Read, data is simply copied from the object's buffer into | 13 // URLRequestFileJob::Read, data is simply copied from the object's buffer into |
| 14 // the given buffer. If there is no data to copy, the URLRequestFileJob | 14 // the given buffer. If there is no data to copy, the URLRequestFileJob |
| 15 // attempts to read more from the file to fill its buffer. If reading from the | 15 // attempts to read more from the file to fill its buffer. If reading from the |
| 16 // file does not complete synchronously, then the URLRequestFileJob waits for a | 16 // file does not complete synchronously, then the URLRequestFileJob waits for a |
| 17 // signal from the OS that the overlapped read has completed. It does so by | 17 // signal from the OS that the overlapped read has completed. It does so by |
| 18 // leveraging the MessageLoop::WatchObject API. | 18 // leveraging the MessageLoop::WatchObject API. |
| 19 | 19 |
| 20 #include "net/url_request/url_request_file_job.h" | 20 #include "net/url_request/url_request_file_job.h" |
| 21 | 21 |
| 22 #include "base/compiler_specific.h" | 22 #include "base/compiler_specific.h" |
| 23 #include "base/message_loop.h" | 23 #include "base/message_loop.h" |
| 24 #include "base/platform_file.h" | 24 #include "base/platform_file.h" |
| 25 #include "base/string_util.h" | 25 #include "base/string_util.h" |
| 26 #include "base/threading/worker_pool.h" | 26 #include "base/threading/worker_pool.h" |
| 27 #include "base/thread_restrictions.h" | 27 #include "base/threading/thread_restrictions.h" |
| 28 #include "build/build_config.h" | 28 #include "build/build_config.h" |
| 29 #include "googleurl/src/gurl.h" | 29 #include "googleurl/src/gurl.h" |
| 30 #include "net/base/io_buffer.h" | 30 #include "net/base/io_buffer.h" |
| 31 #include "net/base/load_flags.h" | 31 #include "net/base/load_flags.h" |
| 32 #include "net/base/mime_util.h" | 32 #include "net/base/mime_util.h" |
| 33 #include "net/base/net_errors.h" | 33 #include "net/base/net_errors.h" |
| 34 #include "net/base/net_util.h" | 34 #include "net/base/net_util.h" |
| 35 #include "net/http/http_util.h" | 35 #include "net/http/http_util.h" |
| 36 #include "net/url_request/url_request.h" | 36 #include "net/url_request/url_request.h" |
| 37 #include "net/url_request/url_request_error_job.h" | 37 #include "net/url_request/url_request_error_job.h" |
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| 381 if (white_listed_path == file_path.StripTrailingSeparators() || | 381 if (white_listed_path == file_path.StripTrailingSeparators() || |
| 382 white_listed_path.IsParent(file_path)) { | 382 white_listed_path.IsParent(file_path)) { |
| 383 return false; | 383 return false; |
| 384 } | 384 } |
| 385 } | 385 } |
| 386 return true; | 386 return true; |
| 387 } | 387 } |
| 388 #endif | 388 #endif |
| 389 | 389 |
| 390 } // namespace net | 390 } // namespace net |
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