/* -*- 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 "BodyExtractor.h"

#include "mozilla/dom/File.h"

#include "mozilla/dom/FormData.h"

#include "mozilla/dom/TypedArray.h"

#include "mozilla/dom/URLSearchParams.h"

#include "mozilla/dom/XMLHttpRequest.h"

#include "mozilla/UniquePtr.h"

#include "nsContentUtils.h"

#include "nsDOMSerializer.h"

#include "nsIGlobalObject.h"

#include "nsIInputStream.h"

#include "nsIOutputStream.h"

#include "nsIStorageStream.h"

#include "nsStringStream.h"

namespace mozilla {

namespace dom {

static nsresult

GetBufferDataAsStream(const uint8_t* aData, uint32_t aDataLength,

                      nsIInputStream** aResult, uint64_t* aContentLength,

                      nsACString& aContentType, nsACString& aCharset)

{

  aContentType.SetIsVoid(true);

  aCharset.Truncate();

  *aContentLength = aDataLength;

  const char* data = reinterpret_cast<const char*>(aData);

  nsCOMPtr<nsIInputStream> stream;

  nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream), data, aDataLength,

                                      NS_ASSIGNMENT_COPY);

  NS_ENSURE_SUCCESS(rv, rv);

  stream.forget(aResult);

  return NS_OK;

}

template<> nsresult

BodyExtractor<const ArrayBuffer>::GetAsStream(nsIInputStream** aResult,

                                              uint64_t* aContentLength,

                                              nsACString& aContentTypeWithCharset,

                                              nsACString& aCharset) const

{

  mBody->ComputeLengthAndData();

  return GetBufferDataAsStream(mBody->Data(), mBody->Length(),

                               aResult, aContentLength, aContentTypeWithCharset,

                               aCharset);

}

template<> nsresult

BodyExtractor<const ArrayBufferView>::GetAsStream(nsIInputStream** aResult,

                                                  uint64_t* aContentLength,

                                                  nsACString& aContentTypeWithCharset,

                                                  nsACString& aCharset) const

{

  mBody->ComputeLengthAndData();

  return GetBufferDataAsStream(mBody->Data(), mBody->Length(),

                               aResult, aContentLength, aContentTypeWithCharset,

                               aCharset);

}

template<> nsresult

BodyExtractor<nsIDocument>::GetAsStream(nsIInputStream** aResult,

                                        uint64_t* aContentLength,

                                        nsACString& aContentTypeWithCharset,

                                        nsACString& aCharset) const

{

  NS_ENSURE_STATE(mBody);

  aCharset.AssignLiteral("UTF-8");

  nsresult rv;

  nsCOMPtr<nsIStorageStream> storStream;

  rv = NS_NewStorageStream(4096, UINT32_MAX, getter_AddRefs(storStream));

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIOutputStream> output;

  rv = storStream->GetOutputStream(0, getter_AddRefs(output));

  NS_ENSURE_SUCCESS(rv, rv);

  if (mBody->IsHTMLDocument()) {

    aContentTypeWithCharset.AssignLiteral("text/html;charset=UTF-8");

    nsString serialized;

    if (!nsContentUtils::SerializeNodeToMarkup(mBody, true, serialized)) {

      return NS_ERROR_OUT_OF_MEMORY;

    }

    nsAutoCString utf8Serialized;

    if (!AppendUTF16toUTF8(serialized, utf8Serialized, fallible)) {

      return NS_ERROR_OUT_OF_MEMORY;

    }

    uint32_t written;

    rv = output->Write(utf8Serialized.get(), utf8Serialized.Length(), &written);

    NS_ENSURE_SUCCESS(rv, rv);

    MOZ_ASSERT(written == utf8Serialized.Length());

  } else {

    aContentTypeWithCharset.AssignLiteral("application/xml;charset=UTF-8");

    auto serializer = MakeUnique<nsDOMSerializer>();

    // Make sure to use the encoding we'll send

    ErrorResult res;

    serializer->SerializeToStream(*mBody, output, NS_LITERAL_STRING("UTF-8"),

                                  res);

    if (NS_WARN_IF(res.Failed())) {

      return res.StealNSResult();

    }

  }

  output->Close();

  uint32_t length;

  rv = storStream->GetLength(&length);

  NS_ENSURE_SUCCESS(rv, rv);

  *aContentLength = length;

  rv = storStream->NewInputStream(0, aResult);

  NS_ENSURE_SUCCESS(rv, rv);

  return NS_OK;

}

template<> nsresult

BodyExtractor<const nsAString>::GetAsStream(nsIInputStream** aResult,

                                            uint64_t* aContentLength,

                                            nsACString& aContentTypeWithCharset,

                                            nsACString& aCharset) const

{

  nsCString encoded;

  if (!CopyUTF16toUTF8(*mBody, encoded, fallible)) {

    return NS_ERROR_OUT_OF_MEMORY;

  }

  uint32_t encodedLength = encoded.Length();

  nsresult rv = NS_NewCStringInputStream(aResult, std::move(encoded));

  if (NS_WARN_IF(NS_FAILED(rv))) {

    return rv;

  }

  *aContentLength = encodedLength;

  aContentTypeWithCharset.AssignLiteral("text/plain;charset=UTF-8");

  aCharset.AssignLiteral("UTF-8");

  return NS_OK;

}

template<> nsresult

BodyExtractor<nsIInputStream>::GetAsStream(nsIInputStream** aResult,

                                           uint64_t* aContentLength,

                                           nsACString& aContentTypeWithCharset,

                                           nsACString& aCharset) const

{

  aContentTypeWithCharset.AssignLiteral("text/plain");

  aCharset.Truncate();

  nsresult rv = mBody->Available(aContentLength);

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIInputStream> stream(mBody);

  stream.forget(aResult);

  return NS_OK;

}

template<> nsresult

BodyExtractor<const Blob>::GetAsStream(nsIInputStream** aResult,

                                       uint64_t* aContentLength,

                                       nsACString& aContentTypeWithCharset,

                                       nsACString& aCharset) const

{

  return mBody->GetSendInfo(aResult, aContentLength, aContentTypeWithCharset,

                            aCharset);

}

template<> nsresult

BodyExtractor<const FormData>::GetAsStream(nsIInputStream** aResult,

                                           uint64_t* aContentLength,

                                           nsACString& aContentTypeWithCharset,

                                           nsACString& aCharset) const

{

  return mBody->GetSendInfo(aResult, aContentLength, aContentTypeWithCharset,

                            aCharset);

}

template<> nsresult

BodyExtractor<const URLSearchParams>::GetAsStream(nsIInputStream** aResult,

                                                  uint64_t* aContentLength,

                                                  nsACString& aContentTypeWithCharset,

                                                  nsACString& aCharset) const

{

  return mBody->GetSendInfo(aResult, aContentLength, aContentTypeWithCharset,

                            aCharset);

}

} // dom namespace

} // mozilla namespace