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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et cin: */
/* 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/. */
/*
A protocol handler for ``chrome:''
*/
#include "nsChromeProtocolHandler.h"
#include "nsChromeRegistry.h"
#include "nsCOMPtr.h"
#include "nsThreadUtils.h"
#include "nsIChannel.h"
#include "nsIChromeRegistry.h"
#include "nsIFile.h"
#include "nsIFileChannel.h"
#include "nsIIOService.h"
#include "nsILoadGroup.h"
#include "nsIScriptSecurityManager.h"
#include "nsIStandardURL.h"
#include "nsNetUtil.h"
#include "nsNetCID.h"
#include "nsIURL.h"
#include "nsString.h"
#include "nsStandardURL.h"
////////////////////////////////////////////////////////////////////////////////
NS_IMPL_ISUPPORTS(nsChromeProtocolHandler,
nsIProtocolHandler,
nsISupportsWeakReference)
////////////////////////////////////////////////////////////////////////////////
// nsIProtocolHandler methods:
NS_IMETHODIMP
nsChromeProtocolHandler::GetScheme(nsACString &result)
{
result.AssignLiteral("chrome");
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::GetDefaultPort(int32_t *result)
{
*result = -1; // no port for chrome: URLs
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::AllowPort(int32_t port, const char *scheme, bool *_retval)
{
// don't override anything.
*_retval = false;
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::GetProtocolFlags(uint32_t *result)
{
*result = URI_STD | URI_IS_UI_RESOURCE | URI_IS_LOCAL_RESOURCE;
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::NewURI(const nsACString &aSpec,
const char *aCharset,
nsIURI *aBaseURI,
nsIURI **result)
{
// Chrome: URLs (currently) have no additional structure beyond that provided
// by standard URLs, so there is no "outer" given to CreateInstance
RefPtr<mozilla::net::nsStandardURL> surl = new mozilla::net::nsStandardURL();
nsresult rv = surl->Init(nsIStandardURL::URLTYPE_STANDARD, -1, aSpec,
aCharset, aBaseURI);
if (NS_FAILED(rv))
return rv;
// Canonify the "chrome:" URL; e.g., so that we collapse
// "chrome://navigator/content/" and "chrome://navigator/content"
// and "chrome://navigator/content/navigator.xul".
rv = nsChromeRegistry::Canonify(surl);
if (NS_FAILED(rv))
return rv;
surl->SetMutable(false);
surl.forget(result);
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::NewChannel2(nsIURI* aURI,
nsILoadInfo* aLoadInfo,
nsIChannel** aResult)
{
nsresult rv;
NS_ENSURE_ARG_POINTER(aURI);
NS_PRECONDITION(aResult, "Null out param");
#ifdef DEBUG
// Check that the uri we got is already canonified
nsresult debug_rv;
nsCOMPtr<nsIURI> debugClone;
debug_rv = aURI->Clone(getter_AddRefs(debugClone));
if (NS_SUCCEEDED(debug_rv)) {
nsCOMPtr<nsIURL> debugURL (do_QueryInterface(debugClone));
debug_rv = nsChromeRegistry::Canonify(debugURL);
if (NS_SUCCEEDED(debug_rv)) {
bool same;
debug_rv = aURI->Equals(debugURL, &same);
if (NS_SUCCEEDED(debug_rv)) {
NS_ASSERTION(same, "Non-canonified chrome uri passed to nsChromeProtocolHandler::NewChannel!");
}
}
}
#endif
nsCOMPtr<nsIChannel> result;
if (!nsChromeRegistry::gChromeRegistry) {
// We don't actually want this ref, we just want the service to
// initialize if it hasn't already.
nsCOMPtr<nsIChromeRegistry> reg =
mozilla::services::GetChromeRegistryService();
NS_ENSURE_TRUE(nsChromeRegistry::gChromeRegistry, NS_ERROR_FAILURE);
}
nsCOMPtr<nsIURI> resolvedURI;
rv = nsChromeRegistry::gChromeRegistry->ConvertChromeURL(aURI, getter_AddRefs(resolvedURI));
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("Couldn't convert chrome URL: %s\n",
aURI->GetSpecOrDefault().get());
#endif
return rv;
}
rv = NS_NewChannelInternal(getter_AddRefs(result),
resolvedURI,
aLoadInfo);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef DEBUG
nsCOMPtr<nsIFileChannel> fileChan(do_QueryInterface(result));
if (fileChan) {
nsCOMPtr<nsIFile> file;
fileChan->GetFile(getter_AddRefs(file));
bool exists = false;
file->Exists(&exists);
if (!exists) {
nsAutoCString path;
file->GetPersistentDescriptor(path);
printf("Chrome file doesn't exist: %s\n", path.get());
}
}
#endif
// Make sure that the channel remembers where it was
// originally loaded from.
nsLoadFlags loadFlags = 0;
result->GetLoadFlags(&loadFlags);
result->SetLoadFlags(loadFlags & ~nsIChannel::LOAD_REPLACE);
rv = result->SetOriginalURI(aURI);
if (NS_FAILED(rv)) return rv;
// Get a system principal for content files and set the owner
// property of the result
nsCOMPtr<nsIURL> url = do_QueryInterface(aURI);
nsAutoCString path;
rv = url->GetPath(path);
if (StringBeginsWith(path, NS_LITERAL_CSTRING("/content/")))
{
nsCOMPtr<nsIScriptSecurityManager> securityManager =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIPrincipal> principal;
rv = securityManager->GetSystemPrincipal(getter_AddRefs(principal));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsISupports> owner = do_QueryInterface(principal);
result->SetOwner(owner);
}
// XXX Removed dependency-tracking code from here, because we're not
// tracking them anyways (with fastload we checked only in DEBUG
// and with startupcache not at all), but this is where we would start
// if we need to re-add.
// See bug 531886, bug 533038.
result->SetContentCharset(NS_LITERAL_CSTRING("UTF-8"));
*aResult = result;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP
nsChromeProtocolHandler::NewChannel(nsIURI* aURI,
nsIChannel* *aResult)
{
return NewChannel2(aURI, nullptr, aResult);
}
////////////////////////////////////////////////////////////////////////////////
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