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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 #ifndef NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_ | |
| 6 #define NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/files/file_path.h" | |
| 11 #include "net/disk_cache/blockfile/backend_impl.h" | |
| 12 | |
| 13 #ifdef WIN32 | |
| 14 // Dumping the cache often creates very large filenames, which are tricky | |
| 15 // on windows. Most API calls don't support large filenames, including | |
| 16 // most of the base library functions. Unfortunately, adding "\\?\" into | |
| 17 // the filename support is tricky. Instead, if WIN32_LARGE_FILENAME_SUPPORT | |
| 18 // is set, we use direct WIN32 APIs for manipulating the files. | |
| 19 #define WIN32_LARGE_FILENAME_SUPPORT | |
| 20 #endif | |
| 21 | |
| 22 // An abstract class for writing cache dump data. | |
| 23 class CacheDumpWriter { | |
| 24 public: | |
| 25 virtual ~CacheDumpWriter() {} | |
| 26 | |
| 27 // Creates an entry to be written. | |
| 28 // On success, populates the |entry|. | |
| 29 // Returns a net error code. | |
| 30 virtual int CreateEntry(const std::string& key, | |
| 31 disk_cache::Entry** entry, | |
| 32 const net::CompletionCallback& callback) = 0; | |
| 33 | |
| 34 // Write to the current entry. | |
| 35 // Returns a net error code. | |
| 36 virtual int WriteEntry(disk_cache::Entry* entry, int stream, int offset, | |
| 37 net::IOBuffer* buf, int buf_len, | |
| 38 const net::CompletionCallback& callback) = 0; | |
| 39 | |
| 40 // Close the current entry. | |
| 41 virtual void CloseEntry(disk_cache::Entry* entry, base::Time last_used, | |
| 42 base::Time last_modified) = 0; | |
| 43 }; | |
| 44 | |
| 45 // Writes data to a cache. | |
| 46 class CacheDumper : public CacheDumpWriter { | |
| 47 public: | |
| 48 explicit CacheDumper(disk_cache::Backend* cache); | |
| 49 | |
| 50 int CreateEntry(const std::string& key, | |
| 51 disk_cache::Entry** entry, | |
| 52 const net::CompletionCallback& callback) override; | |
| 53 int WriteEntry(disk_cache::Entry* entry, | |
| 54 int stream, | |
| 55 int offset, | |
| 56 net::IOBuffer* buf, | |
| 57 int buf_len, | |
| 58 const net::CompletionCallback& callback) override; | |
| 59 void CloseEntry(disk_cache::Entry* entry, | |
| 60 base::Time last_used, | |
| 61 base::Time last_modified) override; | |
| 62 | |
| 63 private: | |
| 64 disk_cache::Backend* cache_; | |
| 65 }; | |
| 66 | |
| 67 // Writes data to a disk. | |
| 68 class DiskDumper : public CacheDumpWriter { | |
| 69 public: | |
| 70 explicit DiskDumper(const base::FilePath& path); | |
| 71 | |
| 72 int CreateEntry(const std::string& key, | |
| 73 disk_cache::Entry** entry, | |
| 74 const net::CompletionCallback& callback) override; | |
| 75 int WriteEntry(disk_cache::Entry* entry, | |
| 76 int stream, | |
| 77 int offset, | |
| 78 net::IOBuffer* buf, | |
| 79 int buf_len, | |
| 80 const net::CompletionCallback& callback) override; | |
| 81 void CloseEntry(disk_cache::Entry* entry, | |
| 82 base::Time last_used, | |
| 83 base::Time last_modified) override; | |
| 84 | |
| 85 private: | |
| 86 base::FilePath path_; | |
| 87 // This is a bit of a hack. As we get a CreateEntry, we coin the current | |
| 88 // entry_path_ where we write that entry to disk. Subsequent calls to | |
| 89 // WriteEntry() utilize this path for writing to disk. | |
| 90 base::FilePath entry_path_; | |
| 91 std::string entry_url_; | |
| 92 #ifdef WIN32_LARGE_FILENAME_SUPPORT | |
| 93 HANDLE entry_; | |
| 94 #else | |
| 95 FILE* entry_; | |
| 96 #endif | |
| 97 }; | |
| 98 | |
| 99 #endif // NET_TOOLS_DUMP_CACHE_CACHE_DUMPER_H_ | |
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