content/browser/renderer_interface_binders.cc

// Copyright 2017 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 "content/browser/renderer_interface_binders.h"

#include <memory>
#include <utility>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/no_destructor.h"
#include "base/task/post_task.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/permissions/permission_service_context.h"
#include "content/browser/quota_dispatcher_host.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "services/service_manager/public/cpp/binder_registry.h"
#include "third_party/blink/public/common/features.h"
#include "url/origin.h"

namespace content {
namespace {

// A holder for a parameterized BinderRegistry for content-layer interfaces
// exposed to web workers.
class RendererInterfaceBinders {
 public:
  RendererInterfaceBinders() { InitializeParameterizedBinderRegistry(); }

  // Bind an interface request |interface_pipe| for |interface_name| received
  // from a web worker with origin |origin| hosted in the renderer |host|.
  void BindInterface(const std::string& interface_name,
                     mojo::ScopedMessagePipeHandle interface_pipe,
                     RenderProcessHost* host,
                     const url::Origin& origin) {
    if (parameterized_binder_registry_.TryBindInterface(
            interface_name, &interface_pipe, host, origin)) {
      return;
    }

    GetContentClient()->browser()->BindInterfaceRequestFromWorker(
        host, origin, interface_name, std::move(interface_pipe));
  }

  // Try binding an interface request |interface_pipe| for |interface_name|
  // received from |frame|.
  bool TryBindInterface(const std::string& interface_name,
                        mojo::ScopedMessagePipeHandle* interface_pipe,
                        RenderFrameHost* frame) {
    return parameterized_binder_registry_.TryBindInterface(
        interface_name, interface_pipe, frame->GetProcess(),
        frame->GetLastCommittedOrigin());
  }

 private:
  void InitializeParameterizedBinderRegistry();

  service_manager::BinderRegistryWithArgs<RenderProcessHost*,
                                          const url::Origin&>
      parameterized_binder_registry_;
};

// Register renderer-exposed interfaces. Each registered interface binder is
// exposed to all renderer-hosted execution context types (document/frame,
// dedicated worker, shared worker and service worker) where the appropriate
// capability spec in the content_browser manifest includes the interface. For
// interface requests from frames, binders registered on the frame itself
// override binders registered here.
void RendererInterfaceBinders::InitializeParameterizedBinderRegistry() {
  parameterized_binder_registry_.AddInterface(
      base::BindRepeating(&QuotaDispatcherHost::CreateForWorker));
}

RendererInterfaceBinders& GetRendererInterfaceBinders() {
  static base::NoDestructor<RendererInterfaceBinders> binders;
  return *binders;
}

}  // namespace

void BindWorkerInterface(const std::string& interface_name,
                         mojo::ScopedMessagePipeHandle interface_pipe,
                         RenderProcessHost* host,
                         const url::Origin& origin) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  GetRendererInterfaceBinders().BindInterface(
      interface_name, std::move(interface_pipe), host, origin);
}

bool TryBindFrameInterface(const std::string& interface_name,
                           mojo::ScopedMessagePipeHandle* interface_pipe,
                           RenderFrameHost* frame) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  return GetRendererInterfaceBinders().TryBindInterface(interface_name,
                                                        interface_pipe, frame);
}

}  // namespace content