86 lines
3.4 KiB
C++
86 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Content policy implementation that prevents all loads of images,
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* subframes, etc from protocols that don't return data but rather open
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* applications (such as mailto).
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*/
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#include "nsNoDataProtocolContentPolicy.h"
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#include "nsIDOMWindow.h"
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#include "nsString.h"
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#include "nsIProtocolHandler.h"
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#include "nsIIOService.h"
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#include "nsIExternalProtocolHandler.h"
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#include "nsIURI.h"
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#include "nsNetUtil.h"
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#include "nsContentUtils.h"
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NS_IMPL_ISUPPORTS(nsNoDataProtocolContentPolicy, nsIContentPolicy)
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NS_IMETHODIMP
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nsNoDataProtocolContentPolicy::ShouldLoad(uint32_t aContentType,
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nsIURI *aContentLocation,
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nsIURI *aRequestingLocation,
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nsISupports *aRequestingContext,
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const nsACString &aMimeGuess,
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nsISupports *aExtra,
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nsIPrincipal *aRequestPrincipal,
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int16_t *aDecision)
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{
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MOZ_ASSERT(aContentType == nsContentUtils::InternalContentPolicyTypeToExternal(aContentType),
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"We should only see external content policy types here.");
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*aDecision = nsIContentPolicy::ACCEPT;
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// Don't block for TYPE_OBJECT since such URIs are sometimes loaded by the
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// plugin, so they don't necessarily open external apps
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// TYPE_WEBSOCKET loads can only go to ws:// or wss://, so we don't need to
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// concern ourselves with them.
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if (aContentType != TYPE_DOCUMENT &&
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aContentType != TYPE_SUBDOCUMENT &&
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aContentType != TYPE_OBJECT &&
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aContentType != TYPE_WEBSOCKET) {
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// The following are just quick-escapes for the most common cases
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// where we would allow the content to be loaded anyway.
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nsAutoCString scheme;
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aContentLocation->GetScheme(scheme);
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if (scheme.EqualsLiteral("http") ||
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scheme.EqualsLiteral("https") ||
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scheme.EqualsLiteral("ftp") ||
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scheme.EqualsLiteral("file") ||
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scheme.EqualsLiteral("chrome")) {
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return NS_OK;
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}
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bool shouldBlock;
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nsresult rv = NS_URIChainHasFlags(aContentLocation,
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nsIProtocolHandler::URI_DOES_NOT_RETURN_DATA,
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&shouldBlock);
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if (NS_SUCCEEDED(rv) && shouldBlock) {
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*aDecision = nsIContentPolicy::REJECT_REQUEST;
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsNoDataProtocolContentPolicy::ShouldProcess(uint32_t aContentType,
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nsIURI *aContentLocation,
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nsIURI *aRequestingLocation,
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nsISupports *aRequestingContext,
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const nsACString &aMimeGuess,
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nsISupports *aExtra,
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nsIPrincipal *aRequestPrincipal,
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int16_t *aDecision)
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{
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return ShouldLoad(aContentType, aContentLocation, aRequestingLocation,
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aRequestingContext, aMimeGuess, aExtra, aRequestPrincipal,
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aDecision);
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}
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