CRX FileSystem Pepper private API

content/renderer/pepper/pepper_file_system_host.cc

Index: content/renderer/pepper/pepper_file_system_host.cc
diff --git a/content/renderer/pepper/pepper_file_system_host.cc b/content/renderer/pepper/pepper_file_system_host.cc
index 58e7f2c728106111ecc2d09da5908be0503a05be..84357006356dfa7166fd9e7a239bfa3bb17fd606 100644
--- a/content/renderer/pepper/pepper_file_system_host.cc
+++ b/content/renderer/pepper/pepper_file_system_host.cc
@@ -19,6 +19,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
+#include "webkit/fileapi/file_system_util.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 namespace content {
@@ -50,6 +51,19 @@ class PlatformCallbackAdaptor : public NullFileSystemCallbackDispatcher {
   base::WeakPtr<PepperFileSystemHost> weak_host_;
 };
 
+bool LooksLikeAGuid(const std::string& fsid) {
+  const size_t kExpectedFsIdSize = 32;
+  if (fsid.size() != kExpectedFsIdSize)
+    return false;
+  for (std::string::const_iterator it = fsid.begin(); it != fsid.end(); ++it) {
+    if (('A' <= *it && *it <= 'F') ||
+        ('0' <= *it && *it <= '9'))
+      continue;
+    return false;
+  }
+  return true;
+}
+
 }  // namespace
 
 PepperFileSystemHost::PepperFileSystemHost(RendererPpapiHost* host,
@@ -62,21 +76,42 @@ PepperFileSystemHost::PepperFileSystemHost(RendererPpapiHost* host,
       type_(type),
       opened_(false),
       called_open_(false) {
+  ppapi::host::FileSystemRegistry::GetInstance()->Register(pp_instance(),
+                                                           pp_resource(),
+                                                           this);
 }
 
 PepperFileSystemHost::~PepperFileSystemHost() {
+  ppapi::host::FileSystemRegistry::GetInstance()->Unregister(pp_instance(),
+                                                             pp_resource());
 }
 
 int32_t PepperFileSystemHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     ppapi::host::HostMessageContext* context) {
   IPC_BEGIN_MESSAGE_MAP(PepperFileSystemHost, msg)
-    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_FileSystem_Open,
-                                      OnHostMsgOpen)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FileSystem_Open,
+        OnHostMsgOpen)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_FileSystem_InitIsolatedFileSystem,
+        OnHostMsgInitIsolatedFileSystem)
   IPC_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
 
+PP_FileSystemType PepperFileSystemHost::GetType() const {
+  return type_;
+}
+
+bool PepperFileSystemHost::IsOpened() const {
+  return opened_;
+}
+
+const GURL& PepperFileSystemHost::GetRootUrl() const {
+  return root_url_;
+}
+
 void PepperFileSystemHost::OpenFileSystemReply(int32_t pp_error,
                                                const GURL& root) {
   opened_ = (pp_error == PP_OK);
@@ -129,4 +164,18 @@ int32_t PepperFileSystemHost::OnHostMsgOpen(
   return PP_OK_COMPLETIONPENDING;
 }
 
+int32_t PepperFileSystemHost::OnHostMsgInitIsolatedFileSystem(
+    ppapi::host::HostMessageContext* context,
+    const std::string& fsid) {
+  // sanity check
+  if (!LooksLikeAGuid(fsid))
+    return PP_ERROR_BADARGUMENT;
+  const GURL& url =
+      renderer_ppapi_host_->GetDocumentURLForInstance(pp_instance());
+  root_url_ = GURL(fileapi::GetIsolatedFileSystemRootURIString(
+      url.GetWithEmptyPath(), fsid, "crxfs"));
+  opened_ = true;
+  return PP_OK;
+}
+
 }  // namespace content