src/chrome/renderer/extensions/app_bindings.cc

   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 #include "chrome/renderer/extensions/app_bindings.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/strings/string16.h"
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/values.h"
  12 #include "chrome/common/chrome_switches.h"
  13 #include "chrome/common/extensions/extension_constants.h"
  14 #include "content/public/renderer/render_view.h"
  15 #include "content/public/renderer/v8_value_converter.h"
  16 #include "extensions/common/extension_messages.h"
  17 #include "extensions/common/extension_set.h"
  18 #include "extensions/common/manifest.h"
  19 #include "extensions/renderer/console.h"
  20 #include "extensions/renderer/dispatcher.h"
  21 #include "extensions/renderer/extension_helper.h"
  22 #include "extensions/renderer/script_context.h"
  23 #include "third_party/WebKit/public/web/WebDocument.h"
  24 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  25 #include "v8/include/v8.h"
  26
  27 using blink::WebFrame;
  28 using blink::WebLocalFrame;
  29 using content::V8ValueConverter;
  30
  31 namespace extensions {
  32
  33 namespace {
  34
  35 bool IsCheckoutURL(const std::string& url_spec) {
  36   std::string checkout_url_prefix =
  37       CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  38           switches::kAppsCheckoutURL);
  39   if (checkout_url_prefix.empty())
  40     checkout_url_prefix = "https://checkout.google.com/";
  41
  42   return StartsWithASCII(url_spec, checkout_url_prefix, false);
  43 }
  44
  45 bool CheckAccessToAppDetails(WebFrame* frame, v8::Isolate* isolate) {
  46   if (!IsCheckoutURL(frame->document().url().spec())) {
  47     std::string error("Access denied for URL: ");
  48     error += frame->document().url().spec();
  49     isolate->ThrowException(v8::String::NewFromUtf8(isolate, error.c_str()));
  50     return false;
  51   }
  52
  53   return true;
  54 }
  55
  56 const char kInvalidCallbackIdError[] = "Invalid callbackId";
  57
  58 }  // namespace
  59
  60 AppBindings::AppBindings(Dispatcher* dispatcher, ScriptContext* context)
  61     : ObjectBackedNativeHandler(context),
  62       ChromeV8ExtensionHandler(context),
  63       dispatcher_(dispatcher) {
  64   RouteFunction("GetIsInstalled",
  65       base::Bind(&AppBindings::GetIsInstalled, base::Unretained(this)));
  66   RouteFunction("GetDetails",
  67       base::Bind(&AppBindings::GetDetails, base::Unretained(this)));
  68   RouteFunction("GetDetailsForFrame",
  69       base::Bind(&AppBindings::GetDetailsForFrame, base::Unretained(this)));
  70   RouteFunction("GetInstallState",
  71       base::Bind(&AppBindings::GetInstallState, base::Unretained(this)));
  72   RouteFunction("GetRunningState",
  73       base::Bind(&AppBindings::GetRunningState, base::Unretained(this)));
  74 }
  75
  76 void AppBindings::GetIsInstalled(
  77     const v8::FunctionCallbackInfo<v8::Value>& args) {
  78   const Extension* extension = context()->extension();
  79
  80   // TODO(aa): Why only hosted app?
  81   bool result = extension && extension->is_hosted_app() &&
  82       dispatcher_->IsExtensionActive(extension->id());
  83   args.GetReturnValue().Set(result);
  84 }
  85
  86 void AppBindings::GetDetails(
  87     const v8::FunctionCallbackInfo<v8::Value>& args) {
  88   CHECK(context()->web_frame());
  89   args.GetReturnValue().Set(GetDetailsForFrameImpl(context()->web_frame()));
  90 }
  91
  92 void AppBindings::GetDetailsForFrame(
  93     const v8::FunctionCallbackInfo<v8::Value>& args) {
  94   CHECK(context()->web_frame());
  95   if (!CheckAccessToAppDetails(context()->web_frame(), context()->isolate()))
  96     return;
  97
  98   if (args.Length() < 0) {
  99     context()->isolate()->ThrowException(
 100         v8::String::NewFromUtf8(context()->isolate(), "Not enough arguments."));
 101     return;
 102   }
 103
 104   if (!args[0]->IsObject()) {
 105     context()->isolate()->ThrowException(v8::String::NewFromUtf8(
 106         context()->isolate(), "Argument 0 must be an object."));
 107     return;
 108   }
 109
 110   v8::Local<v8::Context> context =
 111       v8::Local<v8::Object>::Cast(args[0])->CreationContext();
 112   CHECK(!context.IsEmpty());
 113
 114   WebLocalFrame* target_frame = WebLocalFrame::frameForContext(context);
 115   if (!target_frame) {
 116     console::Error(args.GetIsolate()->GetCallingContext(),
 117                    "Could not find frame for specified object.");
 118     return;
 119   }
 120
 121   args.GetReturnValue().Set(GetDetailsForFrameImpl(target_frame));
 122 }
 123
 124 v8::Handle<v8::Value> AppBindings::GetDetailsForFrameImpl(
 125     WebFrame* frame) {
 126   v8::Isolate* isolate = frame->mainWorldScriptContext()->GetIsolate();
 127   if (frame->document().securityOrigin().isUnique())
 128     return v8::Null(isolate);
 129
 130   const Extension* extension =
 131       dispatcher_->extensions()->GetExtensionOrAppByURL(
 132           frame->document().url());
 133
 134   if (!extension)
 135     return v8::Null(isolate);
 136
 137   scoped_ptr<base::DictionaryValue> manifest_copy(
 138       extension->manifest()->value()->DeepCopy());
 139   manifest_copy->SetString("id", extension->id());
 140   scoped_ptr<V8ValueConverter> converter(V8ValueConverter::create());
 141   return converter->ToV8Value(manifest_copy.get(),
 142                               frame->mainWorldScriptContext());
 143 }
 144
 145 void AppBindings::GetInstallState(
 146     const v8::FunctionCallbackInfo<v8::Value>& args) {
 147   // Get the callbackId.
 148   int callback_id = 0;
 149   if (args.Length() == 1) {
 150     if (!args[0]->IsInt32()) {
 151       context()->isolate()->ThrowException(v8::String::NewFromUtf8(
 152           context()->isolate(), kInvalidCallbackIdError));
 153       return;
 154     }
 155     callback_id = args[0]->Int32Value();
 156   }
 157
 158   content::RenderView* render_view = context()->GetRenderView();
 159   CHECK(render_view);
 160
 161   Send(new ExtensionHostMsg_GetAppInstallState(
 162       render_view->GetRoutingID(), context()->web_frame()->document().url(),
 163       GetRoutingID(), callback_id));
 164 }
 165
 166 void AppBindings::GetRunningState(
 167     const v8::FunctionCallbackInfo<v8::Value>& args) {
 168   // To distinguish between ready_to_run and cannot_run states, we need the top
 169   // level frame.
 170   const WebFrame* parent_frame = context()->web_frame();
 171   while (parent_frame->parent())
 172     parent_frame = parent_frame->parent();
 173
 174   const ExtensionSet* extensions = dispatcher_->extensions();
 175
 176   // The app associated with the top level frame.
 177   const Extension* parent_app = extensions->GetHostedAppByURL(
 178       parent_frame->document().url());
 179
 180   // The app associated with this frame.
 181   const Extension* this_app = extensions->GetHostedAppByURL(
 182       context()->web_frame()->document().url());
 183
 184   if (!this_app || !parent_app) {
 185     args.GetReturnValue().Set(v8::String::NewFromUtf8(
 186         context()->isolate(), extension_misc::kAppStateCannotRun));
 187     return;
 188   }
 189
 190   const char* state = NULL;
 191   if (dispatcher_->IsExtensionActive(parent_app->id())) {
 192     if (parent_app == this_app)
 193       state = extension_misc::kAppStateRunning;
 194     else
 195       state = extension_misc::kAppStateCannotRun;
 196   } else if (parent_app == this_app) {
 197     state = extension_misc::kAppStateReadyToRun;
 198   } else {
 199     state = extension_misc::kAppStateCannotRun;
 200   }
 201
 202   args.GetReturnValue()
 203       .Set(v8::String::NewFromUtf8(context()->isolate(), state));
 204 }
 205
 206 bool AppBindings::OnMessageReceived(const IPC::Message& message) {
 207   IPC_BEGIN_MESSAGE_MAP(AppBindings, message)
 208     IPC_MESSAGE_HANDLER(ExtensionMsg_GetAppInstallStateResponse,
 209                         OnAppInstallStateResponse)
 210     IPC_MESSAGE_UNHANDLED(CHECK(false) << "Unhandled IPC message")
 211   IPC_END_MESSAGE_MAP()
 212   return true;
 213 }
 214
 215 void AppBindings::OnAppInstallStateResponse(
 216     const std::string& state, int callback_id) {
 217   v8::Isolate* isolate = context()->isolate();
 218   v8::HandleScope handle_scope(isolate);
 219   v8::Context::Scope context_scope(context()->v8_context());
 220   v8::Handle<v8::Value> argv[] = {
 221     v8::String::NewFromUtf8(isolate, state.c_str()),
 222     v8::Integer::New(isolate, callback_id)
 223   };
 224   context()->module_system()->CallModuleMethod(
 225       "app", "onInstallStateResponse", arraysize(argv), argv);
 226 }
 227
 228 }  // namespace extensions