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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/. */
#include "ExtensionProtocolHandler.h"
#include "nsIAddonPolicyService.h"
#include "nsServiceManagerUtils.h"
#include "nsIURL.h"
#include "nsIChannel.h"
#include "nsIStreamListener.h"
#include "nsIRequestObserver.h"
#include "nsIInputStreamChannel.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsIStreamConverterService.h"
#include "nsIPipe.h"
#include "nsNetUtil.h"
#include "LoadInfo.h"
namespace mozilla {
namespace net {
NS_IMPL_QUERY_INTERFACE(ExtensionProtocolHandler, nsISubstitutingProtocolHandler,
nsIProtocolHandler, nsIProtocolHandlerWithDynamicFlags,
nsISupportsWeakReference)
NS_IMPL_ADDREF_INHERITED(ExtensionProtocolHandler, SubstitutingProtocolHandler)
NS_IMPL_RELEASE_INHERITED(ExtensionProtocolHandler, SubstitutingProtocolHandler)
nsresult
ExtensionProtocolHandler::GetFlagsForURI(nsIURI* aURI, uint32_t* aFlags)
{
// In general a moz-extension URI is only loadable by chrome, but a whitelisted
// subset are web-accessible (and cross-origin fetchable). Check that whitelist.
nsCOMPtr<nsIAddonPolicyService> aps = do_GetService("@mozilla.org/addons/policy-service;1");
bool loadableByAnyone = false;
if (aps) {
nsresult rv = aps->ExtensionURILoadableByAnyone(aURI, &loadableByAnyone);
NS_ENSURE_SUCCESS(rv, rv);
}
*aFlags = URI_STD | URI_IS_LOCAL_RESOURCE | (loadableByAnyone ? (URI_LOADABLE_BY_ANYONE | URI_FETCHABLE_BY_ANYONE) : URI_DANGEROUS_TO_LOAD);
return NS_OK;
}
class PipeCloser : public nsIRequestObserver
{
public:
NS_DECL_ISUPPORTS
explicit PipeCloser(nsIOutputStream* aOutputStream) :
mOutputStream(aOutputStream)
{
}
NS_IMETHOD OnStartRequest(nsIRequest*, nsISupports*) override
{
return NS_OK;
}
NS_IMETHOD OnStopRequest(nsIRequest*, nsISupports*, nsresult aStatusCode) override
{
NS_ENSURE_TRUE(mOutputStream, NS_ERROR_UNEXPECTED);
nsresult rv = mOutputStream->Close();
mOutputStream = nullptr;
return rv;
}
protected:
virtual ~PipeCloser() {}
private:
nsCOMPtr<nsIOutputStream> mOutputStream;
};
NS_IMPL_ISUPPORTS(PipeCloser, nsIRequestObserver)
bool
ExtensionProtocolHandler::ResolveSpecialCases(const nsACString& aHost,
const nsACString& aPath,
const nsACString& aPathname,
nsACString& aResult)
{
// Create special moz-extension:-pages such as moz-extension://foo/_blank.html
// for all registered extensions. We can't just do this as a substitution
// because substitutions can only match on host.
if (!SubstitutingProtocolHandler::HasSubstitution(aHost)) {
return false;
}
if (aPathname.EqualsLiteral("/_blank.html")) {
aResult.AssignLiteral("about:blank");
return true;
}
if (aPathname.EqualsLiteral("/_generated_background_page.html")) {
nsCOMPtr<nsIAddonPolicyService> aps =
do_GetService("@mozilla.org/addons/policy-service;1");
if (!aps) {
return false;
}
nsresult rv = aps->GetGeneratedBackgroundPageUrl(aHost, aResult);
NS_ENSURE_SUCCESS(rv, false);
if (!aResult.IsEmpty()) {
MOZ_RELEASE_ASSERT(Substring(aResult, 0, 5).Equals("data:"));
return true;
}
}
return false;
}
nsresult
ExtensionProtocolHandler::SubstituteChannel(nsIURI* aURI,
nsILoadInfo* aLoadInfo,
nsIChannel** result)
{
nsresult rv;
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString ext;
rv = url->GetFileExtension(ext);
NS_ENSURE_SUCCESS(rv, rv);
if (!ext.LowerCaseEqualsLiteral("css")) {
return NS_OK;
}
// Filter CSS files to replace locale message tokens with localized strings.
nsCOMPtr<nsIStreamConverterService> convService =
do_GetService(NS_STREAMCONVERTERSERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
const char* kFromType = "application/vnd.mozilla.webext.unlocalized";
const char* kToType = "text/css";
nsCOMPtr<nsIInputStream> inputStream;
if (aLoadInfo &&
aLoadInfo->GetSecurityMode() == nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS) {
// If the channel needs to enforce CORS, we need to open the channel async.
nsCOMPtr<nsIOutputStream> outputStream;
rv = NS_NewPipe(getter_AddRefs(inputStream), getter_AddRefs(outputStream),
0, UINT32_MAX, true, false);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIStreamListener> listener;
nsCOMPtr<nsIRequestObserver> observer = new PipeCloser(outputStream);
rv = NS_NewSimpleStreamListener(getter_AddRefs(listener), outputStream, observer);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIStreamListener> converter;
rv = convService->AsyncConvertData(kFromType, kToType, listener,
aURI, getter_AddRefs(converter));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadInfo> loadInfo =
static_cast<LoadInfo*>(aLoadInfo)->CloneForNewRequest();
(*result)->SetLoadInfo(loadInfo);
rv = (*result)->AsyncOpen2(converter);
} else {
// Stylesheet loads for extension content scripts require a sync channel.
nsCOMPtr<nsIInputStream> sourceStream;
if (aLoadInfo && aLoadInfo->GetEnforceSecurity()) {
rv = (*result)->Open2(getter_AddRefs(sourceStream));
} else {
rv = (*result)->Open(getter_AddRefs(sourceStream));
}
NS_ENSURE_SUCCESS(rv, rv);
rv = convService->Convert(sourceStream, kFromType, kToType,
aURI, getter_AddRefs(inputStream));
}
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIChannel> channel;
rv = NS_NewInputStreamChannelInternal(getter_AddRefs(channel), aURI, inputStream,
NS_LITERAL_CSTRING("text/css"),
NS_LITERAL_CSTRING("utf-8"),
aLoadInfo);
NS_ENSURE_SUCCESS(rv, rv);
channel.swap(*result);
return NS_OK;
}
} // namespace net
} // namespace mozilla
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