Implement a proxy for URL util. Some of the implementation that doesn't need ...

ppapi/proxy/ppb_url_util_proxy.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/proxy/ppb_url_util_proxy.h"
+
+#include "base/basictypes.h"
+#include "ppapi/c/dev/ppb_url_util_dev.h"
+#include "ppapi/c/dev/ppb_var_deprecated.h"
+#include "ppapi/c/ppb_core.h"
+#include "ppapi/proxy/plugin_dispatcher.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/serialized_var.h"

[yzshen1, 2011/03/16 21:19:23]

It has been included by ppb_url_util_proxy.h.

+#include "ppapi/shared_impl/url_util_impl.h"
+
+namespace pp {
+namespace proxy {
+
+using pp::shared_impl::URLUtilImpl;
+
+namespace {
+
+URLUtilImpl::VarFromUtf8 GetVarFromUtf8() {
+  const PPB_Var_Deprecated* var_deprecated =
+      static_cast<const PPB_Var_Deprecated*>(
+          PluginDispatcher::GetInterfaceFromDispatcher(
+              PPB_VAR_DEPRECATED_INTERFACE));
+  return var_deprecated->VarFromUtf8;
+}
+
+const std::string* GetStringFromVar(PP_Var var) {
+  return PluginVarTracker::GetInstance()->GetExistingString(var);
+}
+
+PP_Var Canonicalize(PP_Var url,
+                    PP_URLComponents_Dev* components) {
+  return URLUtilImpl::Canonicalize(&GetStringFromVar, GetVarFromUtf8(),
+                                   0, url, components);
+}
+
+// Helper function for the functions below that optionally take a components
+// structure. It's annoying to serialze the large PP_URLComponents structure
+// and this data often isn't needed.
+//
+// To avoid this, we instead just parse the result again in the plugin, which
+// this function does if the given URL is valid and the components are
+// non-NULL. The URL var will be returned.
+PP_Var ConvertComponentsAndReturnURL(PP_Var url,
+                                     PP_URLComponents_Dev* components) {
+  if (!components)
+    return url;  // Common case - plugin doesn't care about parsing.
+
+  const std::string* url_string = GetStringFromVar(url);
+  if (!url_string)
+    return url;
+
+  PP_Var result = Canonicalize(url, components);
+  PluginVarTracker::GetInstance()->Release(url);
+  return result;
+}
+
+PP_Var ResolveRelativeToURL(PP_Var base_url,
+                            PP_Var relative,
+                            PP_URLComponents_Dev* components) {
+  return URLUtilImpl::ResolveRelativeToURL(&GetStringFromVar, GetVarFromUtf8(),
+                                           0, base_url, relative, components);
+}
+
+PP_Var ResolveRelativeToDocument(PP_Instance instance,
+                                 PP_Var relative_string,
+                                 PP_URLComponents_Dev* components) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return PP_MakeUndefined();
+
+  ReceiveSerializedVarReturnValue result;
+  dispatcher->Send(new PpapiHostMsg_PPBURLUtil_ResolveRelativeToDocument(
+      INTERFACE_ID_PPB_URL_UTIL, instance,
+      SerializedVarSendInput(dispatcher, relative_string),
+      &result));
+  return ConvertComponentsAndReturnURL(result.Return(dispatcher), components);
+}
+
+PP_Bool IsSameSecurityOrigin(PP_Var url_a, PP_Var url_b) {
+  return URLUtilImpl::IsSameSecurityOrigin(&GetStringFromVar, url_a, url_b);
+}
+
+PP_Bool DocumentCanRequest(PP_Instance instance, PP_Var url) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return PP_FALSE;
+
+  PP_Bool result = PP_FALSE;
+  dispatcher->Send(new PpapiHostMsg_PPBURLUtil_DocumentCanRequest(
+      INTERFACE_ID_PPB_URL_UTIL, instance,
+      SerializedVarSendInput(dispatcher, url),
+      &result));
+  return result;
+}
+
+PP_Bool DocumentCanAccessDocument(PP_Instance active, PP_Instance target) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(active);
+  if (!dispatcher)
+    return PP_FALSE;
+
+  PP_Bool result = PP_FALSE;
+  dispatcher->Send(new PpapiHostMsg_PPBURLUtil_DocumentCanAccessDocument(
+      INTERFACE_ID_PPB_URL_UTIL, active, target, &result));
+  return result;
+}
+
+PP_Var GetDocumentURL(PP_Instance instance,
+                      struct PP_URLComponents_Dev* components) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return PP_MakeNull();

[yzshen1, 2011/03/16 21:19:23]

Is it intended that line 74 & 116 return different values?

+
+  ReceiveSerializedVarReturnValue result;
+  dispatcher->Send(new PpapiHostMsg_PPBURLUtil_GetDocumentURL(
+      INTERFACE_ID_PPB_URL_UTIL, instance, &result));
+  return ConvertComponentsAndReturnURL(result.Return(dispatcher), components);
+}
+
+const PPB_URLUtil_Dev url_util_interface = {
+  &Canonicalize,
+  &ResolveRelativeToURL,
+  &ResolveRelativeToDocument,
+  &IsSameSecurityOrigin,
+  &DocumentCanRequest,
+  &DocumentCanAccessDocument,
+  &GetDocumentURL
+};
+
+InterfaceProxy* CreateURLUtilProxy(Dispatcher* dispatcher,
+                                   const void* target_interface) {
+  return new PPB_URLUtil_Proxy(dispatcher, target_interface);
+}
+
+}  // namespace
+
+PPB_URLUtil_Proxy::PPB_URLUtil_Proxy(Dispatcher* dispatcher,
+                                     const void* target_interface)
+    : InterfaceProxy(dispatcher, target_interface) {
+}
+
+PPB_URLUtil_Proxy::~PPB_URLUtil_Proxy() {
+}
+
+// static
+const InterfaceProxy::Info* PPB_URLUtil_Proxy::GetInfo() {
+  static const Info info = {
+    &url_util_interface,
+    PPB_URLUTIL_DEV_INTERFACE,
+    INTERFACE_ID_PPB_URL_UTIL,
+    false,
+    &CreateURLUtilProxy,
+  };
+  return &info;
+}
+
+bool PPB_URLUtil_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PPB_URLUtil_Proxy, msg)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBURLUtil_ResolveRelativeToDocument,
+                        OnMsgResolveRelativeToDocument)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBURLUtil_DocumentCanRequest,
+                        OnMsgDocumentCanRequest)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBURLUtil_DocumentCanAccessDocument,
+                        OnMsgDocumentCanAccessDocument)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBURLUtil_GetDocumentURL,
+                        OnMsgGetDocumentURL)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PPB_URLUtil_Proxy::OnMsgResolveRelativeToDocument(
+    PP_Instance instance,
+    SerializedVarReceiveInput relative,
+    SerializedVarReturnValue result) {
+  result.Return(dispatcher(),
+                ppb_url_util_target()->ResolveRelativeToDocument(
+                    instance, relative.Get(dispatcher()), NULL));
+}
+
+void PPB_URLUtil_Proxy::OnMsgDocumentCanRequest(PP_Instance instance,
+                                                SerializedVarReceiveInput url,
+                                                PP_Bool* result) {
+  *result = ppb_url_util_target()->DocumentCanRequest(instance,
+                                                      url.Get(dispatcher()));
+}
+
+void PPB_URLUtil_Proxy::OnMsgDocumentCanAccessDocument(PP_Instance active,
+                                                       PP_Instance target,
+                                                       PP_Bool* result) {
+  *result = ppb_url_util_target()->DocumentCanAccessDocument(
+      active, target);
+}
+
+void PPB_URLUtil_Proxy::OnMsgGetDocumentURL(PP_Instance instance,
+                                            SerializedVarReturnValue result) {
+  result.Return(dispatcher(),
+                ppb_url_util_target()->GetDocumentURL(instance, NULL));
+}
+
+}  // namespace proxy
+}  // namespace pp
+