The Tor Browser: dom/xslt/xml/txXMLParser.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

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

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

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

     6 #include "txXMLParser.h"

     7 #include "txURIUtils.h"

     8 #include "txXPathTreeWalker.h"

    10 #include "nsIDocument.h"

    11 #include "nsIDOMDocument.h"

    12 #include "nsSyncLoadService.h"

    13 #include "nsNetUtil.h"

    14 #include "nsIPrincipal.h"

    16 nsresult

    17 txParseDocumentFromURI(const nsAString& aHref, const txXPathNode& aLoader,

    18                        nsAString& aErrMsg, txXPathNode** aResult)

    19 {

    20     NS_ENSURE_ARG_POINTER(aResult);

    21     *aResult = nullptr;

    22     nsCOMPtr<nsIURI> documentURI;

    23     nsresult rv = NS_NewURI(getter_AddRefs(documentURI), aHref);

    24     NS_ENSURE_SUCCESS(rv, rv);

    26     nsIDocument* loaderDocument = txXPathNativeNode::getDocument(aLoader);

    28     nsCOMPtr<nsILoadGroup> loadGroup = loaderDocument->GetDocumentLoadGroup();

    30     // For the system principal loaderUri will be null here, which is good

    31     // since that means that chrome documents can load any uri.

    33     // Raw pointer, we want the resulting txXPathNode to hold a reference to

    34     // the document.

    35     nsIDOMDocument* theDocument = nullptr;

    36     nsAutoSyncOperation sync(loaderDocument);

    37     rv = nsSyncLoadService::LoadDocument(documentURI,

    38                                          loaderDocument->NodePrincipal(),

    39                                          loadGroup, true, &theDocument);

    41     if (NS_FAILED(rv)) {

    42         aErrMsg.Append(NS_LITERAL_STRING("Document load of ") +

    43                        aHref + NS_LITERAL_STRING(" failed."));

    44         return NS_FAILED(rv) ? rv : NS_ERROR_FAILURE;

    45     }

    47     *aResult = txXPathNativeNode::createXPathNode(theDocument);

    48     if (!*aResult) {

    49         NS_RELEASE(theDocument);

    50         return NS_ERROR_FAILURE;

    51     }

    53     return NS_OK;

    54 }

The Tor Browser / file revision

dom/xslt/xml/txXMLParser.cpp@97036ab72558

dom/xslt/xml/txXMLParser.cpp