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gecko/netwerk/protocol/res/nsResProtocolHandler.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com>
* Benjamin Smedberg <bsmedberg@covad.net>
* Daniel Veditz <dveditz@cruzio.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef MOZ_IPC
#include "mozilla/chrome/RegistryMessageUtils.h"
#endif
#include "nsResProtocolHandler.h"
#include "nsAutoLock.h"
#include "nsIURL.h"
#include "nsIIOService.h"
#include "nsIServiceManager.h"
#include "nsILocalFile.h"
#include "prenv.h"
#include "prmem.h"
#include "prprf.h"
#include "nsXPIDLString.h"
#include "nsIFile.h"
#include "nsDirectoryServiceDefs.h"
#include "nsNetUtil.h"
#include "nsURLHelper.h"
#include "nsEscape.h"
#include "mozilla/Omnijar.h"
static NS_DEFINE_CID(kResURLCID, NS_RESURL_CID);
static nsResProtocolHandler *gResHandler = nsnull;
#if defined(PR_LOGGING)
//
// Log module for Resource Protocol logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsResProtocol:5
// set NSPR_LOG_FILE=log.txt
//
// this enables PR_LOG_ALWAYS level information and places all output in
// the file log.txt
//
static PRLogModuleInfo *gResLog;
#endif
#define kGRE NS_LITERAL_CSTRING("gre")
#define kGRE_RESOURCES NS_LITERAL_CSTRING("gre-resources")
//----------------------------------------------------------------------------
// nsResURL : overrides nsStandardURL::GetFile to provide nsIFile resolution
//----------------------------------------------------------------------------
nsresult
nsResURL::EnsureFile()
{
nsresult rv;
NS_ENSURE_TRUE(gResHandler, NS_ERROR_NOT_AVAILABLE);
nsCAutoString spec;
rv = gResHandler->ResolveURI(this, spec);
if (NS_FAILED(rv)) return rv;
#if defined(MOZ_CHROME_FILE_FORMAT_JAR) || defined(MOZ_OMNIJAR)
nsCAutoString host;
rv = GetHost(host);
if (NS_FAILED(rv))
return rv;
// Deal with the fact resource://gre-resouces/ urls do not resolve to files
if (host.Equals(kGRE_RESOURCES))
return NS_ERROR_NO_INTERFACE;
#endif
#ifdef MOZ_OMNIJAR
if (mozilla::OmnijarPath()) {
if (host.Equals(kGRE))
return NS_ERROR_NO_INTERFACE;
if (host.IsEmpty())
return NS_ERROR_NO_INTERFACE;
}
#endif
rv = net_GetFileFromURLSpec(spec, getter_AddRefs(mFile));
#ifdef DEBUG_bsmedberg
if (NS_SUCCEEDED(rv)) {
PRBool exists = PR_TRUE;
mFile->Exists(&exists);
if (!exists) {
printf("resource %s doesn't exist!\n", spec.get());
}
}
#endif
return rv;
}
/* virtual */ nsStandardURL*
nsResURL::StartClone()
{
nsResURL *clone = new nsResURL();
return clone;
}
NS_IMETHODIMP
nsResURL::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
{
*aClassIDNoAlloc = kResURLCID;
return NS_OK;
}
//----------------------------------------------------------------------------
// nsResProtocolHandler <public>
//----------------------------------------------------------------------------
nsResProtocolHandler::nsResProtocolHandler()
{
#if defined(PR_LOGGING)
gResLog = PR_NewLogModule("nsResProtocol");
#endif
NS_ASSERTION(!gResHandler, "res handler already created!");
gResHandler = this;
}
nsResProtocolHandler::~nsResProtocolHandler()
{
gResHandler = nsnull;
}
nsresult
nsResProtocolHandler::AddSpecialDir(const char* aSpecialDir, const nsACString& aSubstitution)
{
nsCOMPtr<nsIFile> file;
nsresult rv = NS_GetSpecialDirectory(aSpecialDir, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = mIOService->NewFileURI(file, getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
return SetSubstitution(aSubstitution, uri);
}
nsresult
nsResProtocolHandler::Init()
{
if (!mSubstitutions.Init(32))
return NS_ERROR_UNEXPECTED;
nsresult rv;
mIOService = do_GetIOService(&rv);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef MOZ_OMNIJAR
nsCOMPtr<nsIFile> omniJar(mozilla::OmnijarPath());
if (omniJar)
return Init(omniJar);
#endif
// these entries should be kept in sync with the omnijar Init function
//
// make resource:/// point to the application directory
//
rv = AddSpecialDir(NS_OS_CURRENT_PROCESS_DIR, EmptyCString());
NS_ENSURE_SUCCESS(rv, rv);
//
// make resource://gre/ point to the GRE directory
//
rv = AddSpecialDir(NS_GRE_DIR, kGRE);
NS_ENSURE_SUCCESS(rv, rv);
// make resource://gre-resources/ point to gre toolkit[.jar]/res
nsCOMPtr<nsIURI> greURI;
nsCOMPtr<nsIURI> greResURI;
GetSubstitution(kGRE, getter_AddRefs(greURI));
#ifdef MOZ_CHROME_FILE_FORMAT_JAR
NS_NAMED_LITERAL_CSTRING(strGRE_RES_URL, "jar:chrome/toolkit.jar!/res/");
#else
NS_NAMED_LITERAL_CSTRING(strGRE_RES_URL, "chrome/toolkit/res/");
#endif
rv = mIOService->NewURI(strGRE_RES_URL, nsnull, greURI,
getter_AddRefs(greResURI));
SetSubstitution(kGRE_RESOURCES, greResURI);
//XXXbsmedberg Neil wants a resource://pchrome/ for the profile chrome dir...
// but once I finish multiple chrome registration I'm not sure that it is needed
// XXX dveditz: resource://pchrome/ defeats profile directory salting
// if web content can load it. Tread carefully.
return rv;
}
#ifdef MOZ_OMNIJAR
nsresult
nsResProtocolHandler::Init(nsIFile *aOmniJar)
{
nsresult rv;
nsCOMPtr<nsIURI> uri;
nsCAutoString omniJarSpec;
NS_GetURLSpecFromActualFile(aOmniJar, omniJarSpec, mIOService);
nsCAutoString urlStr("jar:");
urlStr += omniJarSpec;
urlStr += "!/";
rv = mIOService->NewURI(urlStr, nsnull, nsnull, getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
// these entries should be kept in sync with the normal Init function
// resource:/// points to jar:omni.jar!/
SetSubstitution(EmptyCString(), uri);
// resource://gre/ points to jar:omni.jar!/
SetSubstitution(kGRE, uri);
urlStr += "chrome/toolkit/res/";
rv = mIOService->NewURI(urlStr, nsnull, nsnull, getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
// resource://gre-resources/ points to jar:omni.jar!/chrome/toolkit/res/
SetSubstitution(kGRE_RESOURCES, uri);
return NS_OK;
}
#endif
#ifdef MOZ_IPC
static PLDHashOperator
EnumerateSubstitution(const nsACString& aKey,
nsIURI* aURI,
void* aArg)
{
nsTArray<ResourceMapping>* resources =
static_cast<nsTArray<ResourceMapping>*>(aArg);
SerializedURI uri;
if (aURI) {
aURI->GetSpec(uri.spec);
aURI->GetOriginCharset(uri.charset);
}
ResourceMapping resource = {
nsDependentCString(aKey), uri
};
resources->AppendElement(resource);
return (PLDHashOperator)PL_DHASH_NEXT;
}
void
nsResProtocolHandler::CollectSubstitutions(nsTArray<ResourceMapping>& aResources)
{
mSubstitutions.EnumerateRead(&EnumerateSubstitution, &aResources);
}
#endif
//----------------------------------------------------------------------------
// nsResProtocolHandler::nsISupports
//----------------------------------------------------------------------------
NS_IMPL_THREADSAFE_ISUPPORTS3(nsResProtocolHandler,
nsIResProtocolHandler,
nsIProtocolHandler,
nsISupportsWeakReference)
//----------------------------------------------------------------------------
// nsResProtocolHandler::nsIProtocolHandler
//----------------------------------------------------------------------------
NS_IMETHODIMP
nsResProtocolHandler::GetScheme(nsACString &result)
{
result.AssignLiteral("resource");
return NS_OK;
}
NS_IMETHODIMP
nsResProtocolHandler::GetDefaultPort(PRInt32 *result)
{
*result = -1; // no port for res: URLs
return NS_OK;
}
NS_IMETHODIMP
nsResProtocolHandler::GetProtocolFlags(PRUint32 *result)
{
// XXXbz Is this really true for all resource: URIs? Could we
// somehow give different flags to some of them?
*result = URI_STD | URI_IS_UI_RESOURCE | URI_IS_LOCAL_RESOURCE;
return NS_OK;
}
NS_IMETHODIMP
nsResProtocolHandler::NewURI(const nsACString &aSpec,
const char *aCharset,
nsIURI *aBaseURI,
nsIURI **result)
{
nsresult rv;
nsResURL *resURL = new nsResURL();
if (!resURL)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(resURL);
// unescape any %2f and %2e to make sure nsStandardURL coalesces them.
// Later net_GetFileFromURLSpec() will do a full unescape and we want to
// treat them the same way the file system will. (bugs 380994, 394075)
nsCAutoString spec;
const char *src = aSpec.BeginReading();
const char *end = aSpec.EndReading();
const char *last = src;
spec.SetCapacity(aSpec.Length()+1);
for ( ; src < end; ++src) {
if (*src == '%' && (src < end-2) && *(src+1) == '2') {
char ch = '\0';
if (*(src+2) == 'f' || *(src+2) == 'F')
ch = '/';
else if (*(src+2) == 'e' || *(src+2) == 'E')
ch = '.';
if (ch) {
if (last < src)
spec.Append(last, src-last);
spec.Append(ch);
src += 2;
last = src+1; // src will be incremented by the loop
}
}
}
if (last < src)
spec.Append(last, src-last);
rv = resURL->Init(nsIStandardURL::URLTYPE_STANDARD, -1, spec, aCharset, aBaseURI);
if (NS_SUCCEEDED(rv))
rv = CallQueryInterface(resURL, result);
NS_RELEASE(resURL);
return rv;
}
NS_IMETHODIMP
nsResProtocolHandler::NewChannel(nsIURI* uri, nsIChannel* *result)
{
NS_ENSURE_ARG_POINTER(uri);
nsresult rv;
nsCAutoString spec;
rv = ResolveURI(uri, spec);
if (NS_FAILED(rv)) return rv;
rv = mIOService->NewChannel(spec, nsnull, nsnull, result);
if (NS_FAILED(rv)) return rv;
return (*result)->SetOriginalURI(uri);
}
NS_IMETHODIMP
nsResProtocolHandler::AllowPort(PRInt32 port, const char *scheme, PRBool *_retval)
{
// don't override anything.
*_retval = PR_FALSE;
return NS_OK;
}
//----------------------------------------------------------------------------
// nsResProtocolHandler::nsIResProtocolHandler
//----------------------------------------------------------------------------
NS_IMETHODIMP
nsResProtocolHandler::SetSubstitution(const nsACString& root, nsIURI *baseURI)
{
if (!baseURI) {
mSubstitutions.Remove(root);
return NS_OK;
}
// If baseURI isn't a resource URI, we can set the substitution immediately.
nsCAutoString scheme;
nsresult rv = baseURI->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
if (!scheme.Equals(NS_LITERAL_CSTRING("resource"))) {
return mSubstitutions.Put(root, baseURI) ? NS_OK : NS_ERROR_UNEXPECTED;
}
// baseURI is a resource URI, let's resolve it first.
nsCAutoString newBase;
rv = ResolveURI(baseURI, newBase);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> newBaseURI;
rv = mIOService->NewURI(newBase, nsnull, nsnull,
getter_AddRefs(newBaseURI));
NS_ENSURE_SUCCESS(rv, rv);
return mSubstitutions.Put(root, newBaseURI) ? NS_OK : NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsResProtocolHandler::GetSubstitution(const nsACString& root, nsIURI **result)
{
NS_ENSURE_ARG_POINTER(result);
if (mSubstitutions.Get(root, result))
return NS_OK;
// try invoking the directory service for "resource:root"
nsCAutoString key;
key.AssignLiteral("resource:");
key.Append(root);
nsCOMPtr<nsIFile> file;
nsresult rv = NS_GetSpecialDirectory(key.get(), getter_AddRefs(file));
if (NS_FAILED(rv))
return NS_ERROR_NOT_AVAILABLE;
rv = mIOService->NewFileURI(file, result);
if (NS_FAILED(rv))
return NS_ERROR_NOT_AVAILABLE;
return NS_OK;
}
NS_IMETHODIMP
nsResProtocolHandler::HasSubstitution(const nsACString& root, PRBool *result)
{
NS_ENSURE_ARG_POINTER(result);
*result = mSubstitutions.Get(root, nsnull);
return NS_OK;
}
NS_IMETHODIMP
nsResProtocolHandler::ResolveURI(nsIURI *uri, nsACString &result)
{
nsresult rv;
nsCOMPtr<nsIURL> url(do_QueryInterface(uri));
if (!url)
return NS_NOINTERFACE;
nsCAutoString host;
nsCAutoString path;
rv = uri->GetAsciiHost(host);
if (NS_FAILED(rv)) return rv;
rv = uri->GetPath(path);
if (NS_FAILED(rv)) return rv;
nsCAutoString filepath;
url->GetFilePath(filepath);
// Don't misinterpret the filepath as an absolute URI.
if (filepath.FindChar(':') != -1)
return NS_ERROR_MALFORMED_URI;
NS_UnescapeURL(filepath);
if (filepath.FindChar('\\') != -1)
return NS_ERROR_MALFORMED_URI;
const char *p = path.get() + 1; // path always starts with a slash
NS_ASSERTION(*(p-1) == '/', "Path did not begin with a slash!");
if (*p == '/')
return NS_ERROR_MALFORMED_URI;
nsCOMPtr<nsIURI> baseURI;
rv = GetSubstitution(host, getter_AddRefs(baseURI));
if (NS_FAILED(rv)) return rv;
rv = baseURI->Resolve(nsDependentCString(p, path.Length()-1), result);
#if defined(PR_LOGGING)
if (PR_LOG_TEST(gResLog, PR_LOG_DEBUG)) {
nsCAutoString spec;
uri->GetAsciiSpec(spec);
PR_LOG(gResLog, PR_LOG_DEBUG,
("%s\n -> %s\n", spec.get(), PromiseFlatCString(result).get()));
}
#endif
return rv;
}
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