extensions/renderer/blob_native_handler.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/blob_native_handler.h"
   6
   7 #include "base/bind.h"
   8 #include "third_party/WebKit/public/platform/WebCString.h"
   9 #include "third_party/WebKit/public/platform/WebURL.h"
  10 #include "third_party/WebKit/public/web/WebBlob.h"
  11
  12 namespace {
  13
  14 // Expects a single Blob argument. Returns the Blob's UUID.
  15 void GetBlobUuid(const v8::FunctionCallbackInfo<v8::Value>& args) {
  16   DCHECK_EQ(1, args.Length());
  17   blink::WebBlob blob = blink::WebBlob::fromV8Value(args[0]);
  18   args.GetReturnValue().Set(
  19       v8::String::NewFromUtf8(args.GetIsolate(), blob.uuid().utf8().data()));
  20 }
  21
  22 // Take ownership of a Blob created on the browser process. Expects the Blob's
  23 // UUID, type, and size as arguments. Returns the Blob we just took to
  24 // Javascript. The Blob reference in the browser process is dropped through
  25 // a separate flow to avoid leaking Blobs if the script context is destroyed.
  26 void TakeBrowserProcessBlob(const v8::FunctionCallbackInfo<v8::Value>& args) {
  27   DCHECK_EQ(3, args.Length());
  28   DCHECK(args[0]->IsString());
  29   DCHECK(args[1]->IsString());
  30   DCHECK(args[2]->IsInt32());
  31   std::string uuid(*v8::String::Utf8Value(args[0]->ToString()));
  32   std::string type(*v8::String::Utf8Value(args[1]->ToString()));
  33   blink::WebBlob blob =
  34       blink::WebBlob::createFromUUID(blink::WebString::fromUTF8(uuid),
  35                                      blink::WebString::fromUTF8(type),
  36                                      args[2]->Int32Value());
  37   args.GetReturnValue().Set(blob.toV8Value(args.Holder(), args.GetIsolate()));
  38 }
  39
  40 }  // namespace
  41
  42 namespace extensions {
  43
  44 BlobNativeHandler::BlobNativeHandler(ScriptContext* context)
  45     : ObjectBackedNativeHandler(context) {
  46   RouteFunction("GetBlobUuid", base::Bind(&GetBlobUuid));
  47   RouteFunction("TakeBrowserProcessBlob", base::Bind(&TakeBrowserProcessBlob));
  48 }
  49
  50 }  // namespace extensions