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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 "nsString.h"
#include "nsIProtocolHandler.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsContentUtils.h"
NS_IMPL_ISUPPORTS(nsNoDataProtocolContentPolicy, nsIContentPolicy)
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldLoad(nsIURI* aContentLocation,
nsILoadInfo* aLoadInfo,
const nsACString& aMimeGuess,
int16_t* aDecision) {
ExtContentPolicyType contentType = aLoadInfo->GetExternalContentPolicyType();
*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 (contentType != ExtContentPolicy::TYPE_DOCUMENT &&
contentType != ExtContentPolicy::TYPE_SUBDOCUMENT &&
contentType != ExtContentPolicy::TYPE_OBJECT &&
contentType != ExtContentPolicy::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) {
NS_SetRequestBlockingReason(
aLoadInfo,
nsILoadInfo::BLOCKING_REASON_CONTENT_POLICY_NO_DATA_PROTOCOL);
*aDecision = nsIContentPolicy::REJECT_REQUEST;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldProcess(nsIURI* aContentLocation,
nsILoadInfo* aLoadInfo,
const nsACString& aMimeGuess,
int16_t* aDecision) {
return ShouldLoad(aContentLocation, aLoadInfo, aMimeGuess, aDecision);
}
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