/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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/. */

#include "URLMainThread.h"

#include "mozilla/dom/BindingUtils.h"

#include "mozilla/dom/Blob.h"

#include "mozilla/dom/BlobURLProtocolHandler.h"

#include "mozilla/Unused.h"

#include "nsContentUtils.h"

#include "nsIURL.h"

#include "nsIURIMutator.h"

#include "nsNetUtil.h"

namespace mozilla {

namespace dom {

/* static */ already_AddRefed<URLMainThread>

URLMainThread::Constructor(const GlobalObject& aGlobal, const nsAString& aURL,

                           const Optional<nsAString>& aBase, ErrorResult& aRv)

{

  if (aBase.WasPassed()) {

    return Constructor(aGlobal.GetAsSupports(), aURL, aBase.Value(), aRv);

  }

  return Constructor(aGlobal.GetAsSupports(), aURL, nullptr, aRv);

}

/* static */ already_AddRefed<URLMainThread>

URLMainThread::Constructor(nsISupports* aParent, const nsAString& aURL,

                           const nsAString& aBase, ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIURI> baseUri;

  nsresult rv = NS_NewURI(getter_AddRefs(baseUri), aBase, nullptr, nullptr,

                          nsContentUtils::GetIOService());

  if (NS_WARN_IF(NS_FAILED(rv))) {

    aRv.ThrowTypeError<MSG_INVALID_URL>(aBase);

    return nullptr;

  }

  return Constructor(aParent, aURL, baseUri, aRv);

}

/* static */ already_AddRefed<URLMainThread>

URLMainThread::Constructor(nsISupports* aParent, const nsAString& aURL,

                           nsIURI* aBase, ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIURI> uri;

  nsresult rv = NS_NewURI(getter_AddRefs(uri), aURL, nullptr, aBase,

                          nsContentUtils::GetIOService());

  if (NS_FAILED(rv)) {

    // No need to warn in this case. It's common to use the URL constructor

    // to determine if a URL is valid and an exception will be propagated.

    aRv.ThrowTypeError<MSG_INVALID_URL>(aURL);

    return nullptr;

  }

  RefPtr<URLMainThread> url = new URLMainThread(aParent);

  url->SetURI(uri.forget());

  return url.forget();

}

/* static */ void

URLMainThread::CreateObjectURL(const GlobalObject& aGlobal, Blob& aBlob,

                               nsAString& aResult, ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());

  if (NS_WARN_IF(!global)) {

    aRv.Throw(NS_ERROR_FAILURE);

    return;

  }

  nsCOMPtr<nsIPrincipal> principal =

    nsContentUtils::ObjectPrincipal(aGlobal.Get());

  nsAutoCString url;

  aRv = BlobURLProtocolHandler::AddDataEntry(aBlob.Impl(), principal, url);

  if (NS_WARN_IF(aRv.Failed())) {

    return;

  }

  global->RegisterHostObjectURI(url);

  CopyASCIItoUTF16(url, aResult);

}

/* static */ void

URLMainThread::CreateObjectURL(const GlobalObject& aGlobal,

                               MediaSource& aSource,

                               nsAString& aResult, ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIPrincipal> principal =

    nsContentUtils::ObjectPrincipal(aGlobal.Get());

  nsAutoCString url;

  aRv = BlobURLProtocolHandler::AddDataEntry(&aSource, principal, url);

  if (NS_WARN_IF(aRv.Failed())) {

    return;

  }

  nsCOMPtr<nsIRunnable> revocation =

    NS_NewRunnableFunction("dom::URLMainThread::CreateObjectURL", [url] {

      BlobURLProtocolHandler::RemoveDataEntry(url);

    });

  nsContentUtils::RunInStableState(revocation.forget());

  CopyASCIItoUTF16(url, aResult);

}

/* static */ void

URLMainThread::RevokeObjectURL(const GlobalObject& aGlobal,

                               const nsAString& aURL, ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());

  if (!global) {

    aRv.Throw(NS_ERROR_FAILURE);

    return;

  }

  nsIPrincipal* principal = nsContentUtils::ObjectPrincipal(aGlobal.Get());

  NS_LossyConvertUTF16toASCII asciiurl(aURL);

  nsIPrincipal* urlPrincipal =

    BlobURLProtocolHandler::GetDataEntryPrincipal(asciiurl);

  if (urlPrincipal && principal->Subsumes(urlPrincipal)) {

    global->UnregisterHostObjectURI(asciiurl);

    BlobURLProtocolHandler::RemoveDataEntry(asciiurl);

  }

}

URLMainThread::URLMainThread(nsISupports* aParent)

  : URL(aParent)

{

  MOZ_ASSERT(NS_IsMainThread());

}

URLMainThread::~URLMainThread()

{

  MOZ_ASSERT(NS_IsMainThread());

}

/* static */ bool

URLMainThread::IsValidURL(const GlobalObject& aGlobal, const nsAString& aURL,

                          ErrorResult& aRv)

{

  MOZ_ASSERT(NS_IsMainThread());

  NS_LossyConvertUTF16toASCII asciiurl(aURL);

  return BlobURLProtocolHandler::HasDataEntry(asciiurl);

}

void

URLMainThread::SetHref(const nsAString& aHref, ErrorResult& aRv)

{

  NS_ConvertUTF16toUTF8 href(aHref);

  nsresult rv;

  nsCOMPtr<nsIIOService> ioService(do_GetService(NS_IOSERVICE_CONTRACTID, &rv));

  if (NS_FAILED(rv)) {

    aRv.Throw(rv);

    return;

  }

  nsCOMPtr<nsIURI> uri;

  rv = ioService->NewURI(href, nullptr, nullptr, getter_AddRefs(uri));

  if (NS_FAILED(rv)) {

    aRv.ThrowTypeError<MSG_INVALID_URL>(aHref);

    return;

  }

  SetURI(uri.forget());

  UpdateURLSearchParams();

}

void

URLMainThread::GetOrigin(nsAString& aOrigin, ErrorResult& aRv) const

{

  nsContentUtils::GetUTFOrigin(GetURI(), aOrigin);

}

void

URLMainThread::SetProtocol(const nsAString& aProtocol, ErrorResult& aRv)

{

  nsAString::const_iterator start, end;

  aProtocol.BeginReading(start);

  aProtocol.EndReading(end);

  nsAString::const_iterator iter(start);

  FindCharInReadable(':', iter, end);

  // Changing the protocol of a URL, changes the "nature" of the URI

  // implementation. In order to do this properly, we have to serialize the

  // existing URL and reparse it in a new object.

  nsCOMPtr<nsIURI> clone;

  nsresult rv = NS_MutateURI(GetURI())

                  .SetScheme(NS_ConvertUTF16toUTF8(Substring(start, iter)))

                  .Finalize(clone);

  if (NS_WARN_IF(NS_FAILED(rv))) {

    return;

  }

  nsAutoCString href;

  rv = clone->GetSpec(href);

  if (NS_WARN_IF(NS_FAILED(rv))) {

    return;

  }

  nsCOMPtr<nsIURI> uri;

  rv = NS_NewURI(getter_AddRefs(uri), href);

  if (NS_WARN_IF(NS_FAILED(rv))) {

    return;

  }

  SetURI(uri.forget());

}

} // namespace dom

} // namespace mozilla