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/* -*- 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/. */
/*
* Content policy implementation that prevents all loads of images,
* subframes, etc from protocols that don't return data but rather open
* applications (such as mailto).
*/
#include "nsNoDataProtocolContentPolicy.h"
#include "nsIDOMWindow.h"
#include "nsString.h"
#include "nsIProtocolHandler.h"
#include "nsIIOService.h"
#include "nsIExternalProtocolHandler.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsContentUtils.h"
NS_IMPL_ISUPPORTS(nsNoDataProtocolContentPolicy, nsIContentPolicy)
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldLoad(uint32_t aContentType,
nsIURI *aContentLocation,
nsIURI *aRequestingLocation,
nsISupports *aRequestingContext,
const nsACString &aMimeGuess,
nsISupports *aExtra,
nsIPrincipal *aRequestPrincipal,
int16_t *aDecision)
{
MOZ_ASSERT(aContentType == nsContentUtils::InternalContentPolicyTypeToExternal(aContentType),
"We should only see external content policy types here.");
*aDecision = nsIContentPolicy::ACCEPT;
// Don't block for TYPE_OBJECT since such URIs are sometimes loaded by the
// plugin, so they don't necessarily open external apps
// TYPE_WEBSOCKET loads can only go to ws:// or wss://, so we don't need to
// concern ourselves with them.
if (aContentType != TYPE_DOCUMENT &&
aContentType != TYPE_SUBDOCUMENT &&
aContentType != TYPE_OBJECT &&
aContentType != TYPE_WEBSOCKET) {
// The following are just quick-escapes for the most common cases
// where we would allow the content to be loaded anyway.
nsAutoCString scheme;
aContentLocation->GetScheme(scheme);
if (scheme.EqualsLiteral("http") ||
scheme.EqualsLiteral("https") ||
scheme.EqualsLiteral("ftp") ||
scheme.EqualsLiteral("file") ||
scheme.EqualsLiteral("chrome")) {
return NS_OK;
}
bool shouldBlock;
nsresult rv = NS_URIChainHasFlags(aContentLocation,
nsIProtocolHandler::URI_DOES_NOT_RETURN_DATA,
&shouldBlock);
if (NS_SUCCEEDED(rv) && shouldBlock) {
*aDecision = nsIContentPolicy::REJECT_REQUEST;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldProcess(uint32_t aContentType,
nsIURI *aContentLocation,
nsIURI *aRequestingLocation,
nsISupports *aRequestingContext,
const nsACString &aMimeGuess,
nsISupports *aExtra,
nsIPrincipal *aRequestPrincipal,
int16_t *aDecision)
{
return ShouldLoad(aContentType, aContentLocation, aRequestingLocation,
aRequestingContext, aMimeGuess, aExtra, aRequestPrincipal,
aDecision);
}
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