WorkerCSPContext.h

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_workers_WorkerCSPContext_h__

#define mozilla_dom_workers_WorkerCSPContext_h__

#include "mozilla/Result.h"

#include "mozilla/UniquePtr.h"

#include "mozilla/dom/nsCSPUtils.h"

#include "mozilla/ipc/PBackgroundSharedTypes.h"

#include "nscore.h"

class nsIContentSecurityPolicy;

namespace mozilla::dom {

// A minimal version of nsCSPContext that can run on Worker threads.

class WorkerCSPContext final {

 public:

  explicit WorkerCSPContext(mozilla::ipc::CSPInfo&& aInfo) : mCSPInfo(aInfo) {}

  static Result<UniquePtr<WorkerCSPContext>, nsresult> CreateFromCSP(

      nsIContentSecurityPolicy* aCSP);

  const mozilla::ipc::CSPInfo& CSPInfo() const { return mCSPInfo; }

  const nsTArray<UniquePtr<const nsCSPPolicy>>& Policies();

 private:

  void EnsureIPCPoliciesRead();

  // Thread boundaries require us to not only store a CSP object, but also a

  // serialized version of the CSP. Reason being: Serializing a CSP to a CSPInfo

  // needs to happen on the main thread, but storing the CSPInfo needs to happen

  // on the worker thread. We move the CSPInfo into the Client within

  // ScriptExecutorRunnable::PreRun().

  mozilla::ipc::CSPInfo mCSPInfo;

  // This is created lazily by parsing the policies in CSPInfo on the worker

  // thread.

  nsTArray<UniquePtr<const nsCSPPolicy>> mPolicies;

};

}  // namespace mozilla::dom

#endif  // mozilla_dom_workers_WorkerCSPContext_h__