extensions/renderer/file_system_natives.cc

   1 // Copyright 2014 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 "extensions/renderer/file_system_natives.h"
   6
   7 #include <string>
   8
   9 #include "extensions/common/constants.h"
  10 #include "extensions/renderer/script_context.h"
  11 #include "storage/common/fileapi/file_system_types.h"
  12 #include "storage/common/fileapi/file_system_util.h"
  13 #include "third_party/WebKit/public/platform/WebString.h"
  14 #include "third_party/WebKit/public/web/WebDOMError.h"
  15 #include "third_party/WebKit/public/web/WebDOMFileSystem.h"
  16 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  17
  18 namespace extensions {
  19
  20 FileSystemNatives::FileSystemNatives(ScriptContext* context)
  21     : ObjectBackedNativeHandler(context) {
  22   RouteFunction(
  23       "GetFileEntry",
  24       base::Bind(&FileSystemNatives::GetFileEntry, base::Unretained(this)));
  25   RouteFunction("GetIsolatedFileSystem",
  26                 base::Bind(&FileSystemNatives::GetIsolatedFileSystem,
  27                            base::Unretained(this)));
  28   RouteFunction("CrackIsolatedFileSystemName",
  29                 base::Bind(&FileSystemNatives::CrackIsolatedFileSystemName,
  30                            base::Unretained(this)));
  31   RouteFunction(
  32       "GetDOMError",
  33       base::Bind(&FileSystemNatives::GetDOMError, base::Unretained(this)));
  34 }
  35
  36 void FileSystemNatives::GetIsolatedFileSystem(
  37     const v8::FunctionCallbackInfo<v8::Value>& args) {
  38   DCHECK(args.Length() == 1 || args.Length() == 2);
  39   DCHECK(args[0]->IsString());
  40   std::string file_system_id(*v8::String::Utf8Value(args[0]));
  41   blink::WebLocalFrame* webframe =
  42       blink::WebLocalFrame::frameForContext(context()->v8_context());
  43   DCHECK(webframe);
  44
  45   GURL context_url =
  46       extensions::ScriptContext::GetDataSourceURLForFrame(webframe);
  47   CHECK(context_url.SchemeIs(extensions::kExtensionScheme));
  48
  49   std::string name(storage::GetIsolatedFileSystemName(context_url.GetOrigin(),
  50                                                       file_system_id));
  51
  52   // The optional second argument is the subfolder within the isolated file
  53   // system at which to root the DOMFileSystem we're returning to the caller.
  54   std::string optional_root_name;
  55   if (args.Length() == 2) {
  56     DCHECK(args[1]->IsString());
  57     optional_root_name = *v8::String::Utf8Value(args[1]);
  58   }
  59
  60   GURL root_url(storage::GetIsolatedFileSystemRootURIString(
  61       context_url.GetOrigin(), file_system_id, optional_root_name));
  62
  63   args.GetReturnValue().Set(
  64       blink::WebDOMFileSystem::create(webframe,
  65                                       blink::WebFileSystemTypeIsolated,
  66                                       blink::WebString::fromUTF8(name),
  67                                       root_url)
  68           .toV8Value(args.Holder(), args.GetIsolate()));
  69 }
  70
  71 void FileSystemNatives::GetFileEntry(
  72     const v8::FunctionCallbackInfo<v8::Value>& args) {
  73   DCHECK(args.Length() == 5);
  74   DCHECK(args[0]->IsString());
  75   std::string type_string = *v8::String::Utf8Value(args[0]);
  76   blink::WebFileSystemType type;
  77   bool is_valid_type = storage::GetFileSystemPublicType(type_string, &type);
  78   DCHECK(is_valid_type);
  79   if (is_valid_type == false) {
  80     return;
  81   }
  82
  83   DCHECK(args[1]->IsString());
  84   DCHECK(args[2]->IsString());
  85   DCHECK(args[3]->IsString());
  86   std::string file_system_name(*v8::String::Utf8Value(args[1]));
  87   GURL file_system_root_url(*v8::String::Utf8Value(args[2]));
  88   std::string file_path_string(*v8::String::Utf8Value(args[3]));
  89   base::FilePath file_path = base::FilePath::FromUTF8Unsafe(file_path_string);
  90   DCHECK(storage::VirtualPath::IsAbsolute(file_path.value()));
  91
  92   DCHECK(args[4]->IsBoolean());
  93   blink::WebDOMFileSystem::EntryType entry_type =
  94       args[4]->BooleanValue() ? blink::WebDOMFileSystem::EntryTypeDirectory
  95                               : blink::WebDOMFileSystem::EntryTypeFile;
  96
  97   blink::WebLocalFrame* webframe =
  98       blink::WebLocalFrame::frameForContext(context()->v8_context());
  99   DCHECK(webframe);
 100   args.GetReturnValue().Set(
 101       blink::WebDOMFileSystem::create(
 102           webframe,
 103           type,
 104           blink::WebString::fromUTF8(file_system_name),
 105           file_system_root_url)
 106           .createV8Entry(blink::WebString::fromUTF8(file_path_string),
 107                          entry_type,
 108                          args.Holder(),
 109                          args.GetIsolate()));
 110 }
 111
 112 void FileSystemNatives::CrackIsolatedFileSystemName(
 113     const v8::FunctionCallbackInfo<v8::Value>& args) {
 114   DCHECK_EQ(args.Length(), 1);
 115   DCHECK(args[0]->IsString());
 116   std::string filesystem_name = *v8::String::Utf8Value(args[0]);
 117   std::string filesystem_id;
 118   if (!storage::CrackIsolatedFileSystemName(filesystem_name, &filesystem_id))
 119     return;
 120
 121   args.GetReturnValue().Set(v8::String::NewFromUtf8(args.GetIsolate(),
 122                                                     filesystem_id.c_str(),
 123                                                     v8::String::kNormalString,
 124                                                     filesystem_id.size()));
 125 }
 126
 127 void FileSystemNatives::GetDOMError(
 128     const v8::FunctionCallbackInfo<v8::Value>& args) {
 129   if (args.Length() != 2) {
 130     NOTREACHED();
 131     return;
 132   }
 133   if (!args[0]->IsString()) {
 134     NOTREACHED();
 135     return;
 136   }
 137   if (!args[1]->IsString()) {
 138     NOTREACHED();
 139     return;
 140   }
 141
 142   std::string name(*v8::String::Utf8Value(args[0]));
 143   if (name.empty()) {
 144     NOTREACHED();
 145     return;
 146   }
 147   std::string message(*v8::String::Utf8Value(args[1]));
 148   // message is optional hence empty is fine.
 149
 150   blink::WebDOMError dom_error = blink::WebDOMError::create(
 151       blink::WebString::fromUTF8(name), blink::WebString::fromUTF8(message));
 152   args.GetReturnValue().Set(
 153       dom_error.toV8Value(args.Holder(), args.GetIsolate()));
 154 }
 155
 156 }  // namespace extensions