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| 1 // Copyright (c) 2013 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 "chrome/browser/component_updater/component_patcher.h" |
| 6 |
| 7 #include <string> |
| 8 #include <vector> |
| 9 |
| 10 #include "base/file_util.h" |
| 11 #include "base/json/json_file_value_serializer.h" |
| 12 #include "base/values.h" |
| 13 #include "chrome/browser/component_updater/component_patcher_operation.h" |
| 14 #include "chrome/browser/component_updater/component_updater_service.h" |
| 15 |
| 16 namespace { |
| 17 |
| 18 // Deserialize the commands file (present in delta update packages). The top |
| 19 // level must be a list. |
| 20 base::ListValue* ReadCommands(const base::FilePath& unpack_path) { |
| 21 const base::FilePath commands = |
| 22 unpack_path.Append(FILE_PATH_LITERAL("commands.json")); |
| 23 if (!file_util::PathExists(commands)) |
| 24 return NULL; |
| 25 |
| 26 JSONFileValueSerializer serializer(commands); |
| 27 scoped_ptr<base::Value> root(serializer.Deserialize(NULL, NULL)); |
| 28 if (!root.get()) |
| 29 return NULL; |
| 30 |
| 31 if (!root->IsType(base::Value::TYPE_LIST)) |
| 32 return NULL; |
| 33 |
| 34 return static_cast<base::ListValue*>(root.release()); |
| 35 } |
| 36 |
| 37 } // namespace |
| 38 |
| 39 |
| 40 // The patching support is not cross-platform at the moment. |
| 41 ComponentPatcherCrossPlatform::ComponentPatcherCrossPlatform() {} |
| 42 |
| 43 ComponentUnpacker::Error ComponentPatcherCrossPlatform::Patch( |
| 44 PatchType patch_type, |
| 45 const base::FilePath& input_file, |
| 46 const base::FilePath& patch_file, |
| 47 const base::FilePath& output_file, |
| 48 int* error) { |
| 49 return ComponentUnpacker::kDeltaUnsupportedCommand; |
| 50 } |
| 51 |
| 52 |
| 53 // Takes the contents of a differential component update in input_dir |
| 54 // and produces the contents of a full component update in unpack_dir |
| 55 // using input_abs_path_ files that the installer knows about. |
| 56 ComponentUnpacker::Error DifferentialUpdatePatch( |
| 57 const base::FilePath& input_dir, |
| 58 const base::FilePath& unpack_dir, |
| 59 ComponentPatcher* patcher, |
| 60 ComponentInstaller* installer, |
| 61 int* error) { |
| 62 *error = 0; |
| 63 scoped_ptr<base::ListValue> commands(ReadCommands(input_dir)); |
| 64 if (!commands.get()) |
| 65 return ComponentUnpacker::kDeltaBadCommands; |
| 66 |
| 67 for (base::ValueVector::const_iterator command = commands->begin(), |
| 68 end = commands->end(); command != end; command++) { |
| 69 if (!(*command)->IsType(base::Value::TYPE_DICTIONARY)) |
| 70 return ComponentUnpacker::kDeltaBadCommands; |
| 71 base::DictionaryValue* command_args = |
| 72 static_cast<base::DictionaryValue*>(*command); |
| 73 scoped_ptr<DeltaUpdateOp> operation(CreateDeltaUpdateOp(command_args)); |
| 74 if (!operation) |
| 75 return ComponentUnpacker::kDeltaUnsupportedCommand; |
| 76 |
| 77 ComponentUnpacker::Error result = operation->Run( |
| 78 command_args, input_dir, unpack_dir, patcher, installer, error); |
| 79 if (result != ComponentUnpacker::kNone) |
| 80 return result; |
| 81 } |
| 82 |
| 83 return ComponentUnpacker::kNone; |
| 84 } |
| 85 |
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