Bug 1337056 - Part 9: Check LOAD_HTML_OBJECT_DATA in ContentParent::TransmitPermsFor, r=ehsan

#include "mozilla/StyleSheetInlines.h"

#include "nsHostObjectProtocolHandler.h"

#include "nsICaptivePortalService.h"

#include "nsIObjectLoadingContent.h"

#include "nsIBidiKeyboard.h"

{

  MOZ_ASSERT(aChannel);

#ifdef MOZ_PERMISSIONS

  // If the LOAD_DOCUMENT_URI load flag is not set, we don't need to send down

  // permissions, as we won't create a document from this channel.

  // Check if this channel is going to be used to create a document. If it has

  // LOAD_DOCUMENT_URI set it is trivially creating a document. If

  // LOAD_HTML_OBJECT_DATA is set it may or may not be used to create a

  // document, depending on its MIME type.

  nsLoadFlags loadFlags;

  nsresult rv = aChannel->GetLoadFlags(&loadFlags);

  NS_ENSURE_SUCCESS(rv, rv);

  if (!(loadFlags & nsIChannel::LOAD_DOCUMENT_URI)) {

    if (loadFlags & nsIRequest::LOAD_HTML_OBJECT_DATA) {

      nsAutoCString mimeType;

      aChannel->GetContentType(mimeType);

      if (nsContentUtils::HtmlObjectContentTypeForMIMEType(mimeType, nullptr) !=

          nsIObjectLoadingContent::TYPE_DOCUMENT) {

        // The MIME type would not cause the creation of a document

        return NS_OK;

      }

    } else {

      // neither flag was set

      return NS_OK;

    }

  }

  // Get the principal for the channel result, so that we can get the permission

  // key for the document which will be created from this response.