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fune/extensions/gnomevfs/nsGnomeVFSProtocolHandler.cpp
bzbarsky%mit.edu 0a3a624149 Make it possible for protocol handlers to configure how CheckLoadURI should 
treat them via their protocol flags.  Remove the protocol list we used before.
Bug 120373, r=dveditz, sr=darin
2006-11-10 23:49:08 +00:00

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/* vim:set ts=2 sw=2 et cindent: */
/* ***** 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 the Mozilla gnome-vfs extension.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2004
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* 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 ***** */
// GnomeVFS v2.2.2 is missing G_BEGIN_DECLS in gnome-vfs-module-callback.h
extern "C" {
#include <libgnomevfs/gnome-vfs.h>
#include <libgnomevfs/gnome-vfs-standard-callbacks.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
}
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsIGenericFactory.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch2.h"
#include "nsIObserver.h"
#include "nsThreadUtils.h"
#include "nsProxyRelease.h"
#include "nsIAuthPrompt.h"
#include "nsIStringBundle.h"
#include "nsIStandardURL.h"
#include "nsIURL.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "nsINetUtil.h"
#include "nsAutoPtr.h"
#include "nsError.h"
#include "prlog.h"
#include "prtime.h"
#include "prprf.h"
#include "plstr.h"
#define MOZ_GNOMEVFS_SCHEME "moz-gnomevfs"
#define MOZ_GNOMEVFS_SUPPORTED_PROTOCOLS "network.gnomevfs.supported-protocols"
//-----------------------------------------------------------------------------
// NSPR_LOG_MODULES=gnomevfs:5
#ifdef PR_LOGGING
static PRLogModuleInfo *sGnomeVFSLog;
#define LOG(args) PR_LOG(sGnomeVFSLog, PR_LOG_DEBUG, args)
#else
#define LOG(args)
#endif
//-----------------------------------------------------------------------------
static nsresult
MapGnomeVFSResult(GnomeVFSResult result)
{
switch (result)
{
case GNOME_VFS_OK: return NS_OK;
case GNOME_VFS_ERROR_NOT_FOUND: return NS_ERROR_FILE_NOT_FOUND;
case GNOME_VFS_ERROR_INTERNAL: return NS_ERROR_UNEXPECTED;
case GNOME_VFS_ERROR_BAD_PARAMETERS: return NS_ERROR_INVALID_ARG;
case GNOME_VFS_ERROR_NOT_SUPPORTED: return NS_ERROR_NOT_AVAILABLE;
case GNOME_VFS_ERROR_CORRUPTED_DATA: return NS_ERROR_FILE_CORRUPTED;
case GNOME_VFS_ERROR_TOO_BIG: return NS_ERROR_FILE_TOO_BIG;
case GNOME_VFS_ERROR_NO_SPACE: return NS_ERROR_FILE_NO_DEVICE_SPACE;
case GNOME_VFS_ERROR_READ_ONLY:
case GNOME_VFS_ERROR_READ_ONLY_FILE_SYSTEM: return NS_ERROR_FILE_READ_ONLY;
case GNOME_VFS_ERROR_INVALID_URI:
case GNOME_VFS_ERROR_INVALID_HOST_NAME: return NS_ERROR_MALFORMED_URI;
case GNOME_VFS_ERROR_ACCESS_DENIED:
case GNOME_VFS_ERROR_NOT_PERMITTED:
case GNOME_VFS_ERROR_LOGIN_FAILED: return NS_ERROR_FILE_ACCESS_DENIED;
case GNOME_VFS_ERROR_EOF: return NS_BASE_STREAM_CLOSED;
case GNOME_VFS_ERROR_NOT_A_DIRECTORY: return NS_ERROR_FILE_NOT_DIRECTORY;
case GNOME_VFS_ERROR_IN_PROGRESS: return NS_ERROR_IN_PROGRESS;
case GNOME_VFS_ERROR_FILE_EXISTS: return NS_ERROR_FILE_ALREADY_EXISTS;
case GNOME_VFS_ERROR_IS_DIRECTORY: return NS_ERROR_FILE_IS_DIRECTORY;
case GNOME_VFS_ERROR_NO_MEMORY: return NS_ERROR_OUT_OF_MEMORY;
case GNOME_VFS_ERROR_HOST_NOT_FOUND:
case GNOME_VFS_ERROR_HOST_HAS_NO_ADDRESS: return NS_ERROR_UNKNOWN_HOST;
case GNOME_VFS_ERROR_CANCELLED:
case GNOME_VFS_ERROR_INTERRUPTED: return NS_ERROR_ABORT;
case GNOME_VFS_ERROR_DIRECTORY_NOT_EMPTY: return NS_ERROR_FILE_DIR_NOT_EMPTY;
case GNOME_VFS_ERROR_NAME_TOO_LONG: return NS_ERROR_FILE_NAME_TOO_LONG;
case GNOME_VFS_ERROR_SERVICE_NOT_AVAILABLE: return NS_ERROR_UNKNOWN_PROTOCOL;
/* No special mapping for these error codes...
case GNOME_VFS_ERROR_GENERIC:
case GNOME_VFS_ERROR_IO:
case GNOME_VFS_ERROR_WRONG_FORMAT:
case GNOME_VFS_ERROR_BAD_FILE:
case GNOME_VFS_ERROR_NOT_OPEN:
case GNOME_VFS_ERROR_INVALID_OPEN_MODE:
case GNOME_VFS_ERROR_TOO_MANY_OPEN_FILES:
case GNOME_VFS_ERROR_LOOP:
case GNOME_VFS_ERROR_DIRECTORY_BUSY:
case GNOME_VFS_ERROR_TOO_MANY_LINKS:
case GNOME_VFS_ERROR_NOT_SAME_FILE_SYSTEM:
case GNOME_VFS_ERROR_SERVICE_OBSOLETE:
case GNOME_VFS_ERROR_PROTOCOL_ERROR:
case GNOME_VFS_ERROR_NO_MASTER_BROWSER:
*/
// Make GCC happy
default:
return NS_ERROR_FAILURE;
}
return NS_ERROR_FAILURE;
}
//-----------------------------------------------------------------------------
static void
ProxiedAuthCallback(gconstpointer in,
gsize in_size,
gpointer out,
gsize out_size,
gpointer callback_data)
{
GnomeVFSModuleCallbackAuthenticationIn *authIn =
(GnomeVFSModuleCallbackAuthenticationIn *) in;
GnomeVFSModuleCallbackAuthenticationOut *authOut =
(GnomeVFSModuleCallbackAuthenticationOut *) out;
LOG(("gnomevfs: ProxiedAuthCallback [uri=%s]\n", authIn->uri));
// Without a channel, we have no way of getting a prompter.
nsIChannel *channel = (nsIChannel *) callback_data;
if (!channel)
return;
nsCOMPtr<nsIAuthPrompt> prompt;
NS_QueryNotificationCallbacks(channel, prompt);
// If no auth prompt, then give up. We could failover to using the
// WindowWatcher service, but that might defeat a consumer's purposeful
// attempt to disable authentication (for whatever reason).
if (!prompt)
return;
// Parse out the host and port...
nsCOMPtr<nsIURI> uri;
channel->GetURI(getter_AddRefs(uri));
if (!uri)
return;
#ifdef DEBUG
{
//
// Make sure authIn->uri is consistent with the channel's URI.
//
// XXX This check is probably not IDN safe, and it might incorrectly
// fire as a result of escaping differences. It's unclear what
// kind of transforms GnomeVFS might have applied to the URI spec
// that we originally gave to it. In spite of the likelihood of
// false hits, this check is probably still valuable.
//
nsCAutoString spec;
uri->GetSpec(spec);
int uriLen = strlen(authIn->uri);
if (!StringHead(spec, uriLen).Equals(nsDependentCString(authIn->uri, uriLen)))
{
LOG(("gnomevfs: [spec=%s authIn->uri=%s]\n", spec.get(), authIn->uri));
NS_ERROR("URI mismatch");
}
}
#endif
nsCAutoString scheme, hostPort;
uri->GetScheme(scheme);
uri->GetHostPort(hostPort);
// It doesn't make sense for either of these strings to be empty. What kind
// of funky URI is this?
if (scheme.IsEmpty() || hostPort.IsEmpty())
return;
// Construct the single signon key. Altering the value of this key will
// cause people's remembered passwords to be forgotten. Think carefully
// before changing the way this key is constructed.
nsAutoString key, realm;
NS_ConvertUTF8toUTF16 dispHost(scheme);
dispHost.Append(NS_LITERAL_STRING("://"));
dispHost.Append(NS_ConvertUTF8toUTF16(hostPort));
key = dispHost;
if (authIn->realm)
{
// We assume the realm string is ASCII. That might be a bogus assumption,
// but we have no idea what encoding GnomeVFS is using, so for now we'll
// limit ourselves to ISO-Latin-1. XXX What is a better solution?
realm.Append('"');
realm.Append(NS_ConvertASCIItoUTF16(authIn->realm));
realm.Append('"');
key.Append(' ');
key.Append(realm);
}
// Construct the message string...
//
// We use Necko's string bundle here. This code really should be encapsulated
// behind some Necko API, after all this code is based closely on the code in
// nsHttpChannel.cpp.
nsCOMPtr<nsIStringBundleService> bundleSvc =
do_GetService(NS_STRINGBUNDLE_CONTRACTID);
if (!bundleSvc)
return;
nsCOMPtr<nsIStringBundle> bundle;
bundleSvc->CreateBundle("chrome://global/locale/prompts.properties",
getter_AddRefs(bundle));
if (!bundle)
return;
nsString message;
if (!realm.IsEmpty())
{
const PRUnichar *strings[] = { realm.get(), dispHost.get() };
bundle->FormatStringFromName(NS_LITERAL_STRING("EnterUserPasswordForRealm").get(),
strings, 2, getter_Copies(message));
}
else
{
const PRUnichar *strings[] = { dispHost.get() };
bundle->FormatStringFromName(NS_LITERAL_STRING("EnterUserPasswordFor").get(),
strings, 1, getter_Copies(message));
}
if (message.IsEmpty())
return;
// Prompt the user...
nsresult rv;
PRBool retval = PR_FALSE;
PRUnichar *user = nsnull, *pass = nsnull;
rv = prompt->PromptUsernameAndPassword(nsnull, message.get(),
key.get(),
nsIAuthPrompt::SAVE_PASSWORD_PERMANENTLY,
&user, &pass, &retval);
if (NS_FAILED(rv))
return;
if (!retval || !user || !pass)
return;
// XXX We need to convert the UTF-16 username and password from our dialog to
// strings that GnomeVFS can understand. It's unclear what encoding GnomeVFS
// expects, so for now we assume 7-bit ASCII. Hopefully, we can get a better
// solution at some point.
// One copy is never enough...
authOut->username = g_strdup(NS_LossyConvertUTF16toASCII(user).get());
authOut->password = g_strdup(NS_LossyConvertUTF16toASCII(pass).get());
nsMemory::Free(user);
nsMemory::Free(pass);
}
struct nsGnomeVFSAuthCallbackEvent : public nsRunnable
{
gconstpointer in;
gsize in_size;
gpointer out;
gsize out_size;
gpointer callback_data;
NS_IMETHOD Run() {
ProxiedAuthCallback(in, in_size, out, out_size, callback_data);
return NS_OK;
}
};
static void
AuthCallback(gconstpointer in,
gsize in_size,
gpointer out,
gsize out_size,
gpointer callback_data)
{
// Need to proxy this callback over to the main thread. Synchronous dispatch
// is required in order to provide data to the GnomeVFS callback.
nsRefPtr<nsGnomeVFSAuthCallbackEvent> ev = new nsGnomeVFSAuthCallbackEvent();
if (!ev)
return; // OOM
ev->in = in;
ev->in_size = in_size;
ev->out = out;
ev->out_size = out_size;
ev->callback_data = callback_data;
NS_DispatchToMainThread(ev, NS_DISPATCH_SYNC);
}
//-----------------------------------------------------------------------------
static gint
FileInfoComparator(gconstpointer a, gconstpointer b)
{
const GnomeVFSFileInfo *ia = (const GnomeVFSFileInfo *) a;
const GnomeVFSFileInfo *ib = (const GnomeVFSFileInfo *) b;
return strcasecmp(ia->name, ib->name);
}
//-----------------------------------------------------------------------------
class nsGnomeVFSInputStream : public nsIInputStream
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIINPUTSTREAM
nsGnomeVFSInputStream(const nsCString &uriSpec)
: mSpec(uriSpec)
, mChannel(nsnull)
, mHandle(nsnull)
, mBytesRemaining(PR_UINT32_MAX)
, mStatus(NS_OK)
, mDirList(nsnull)
, mDirListPtr(nsnull)
, mDirBufCursor(0)
, mDirOpen(PR_FALSE) {}
~nsGnomeVFSInputStream() { Close(); }
void SetChannel(nsIChannel *channel)
{
// We need to hold an owning reference to our channel. This is done
// so we can access the channel's notification callbacks to acquire
// a reference to a nsIAuthPrompt if we need to handle a GnomeVFS
// authentication callback.
//
// However, the channel can only be accessed on the main thread, so
// we have to be very careful with ownership. Moreover, it doesn't
// support threadsafe addref/release, so proxying is the answer.
//
// Also, it's important to note that this likely creates a reference
// cycle since the channel likely owns this stream. This reference
// cycle is broken in our Close method.
NS_ADDREF(mChannel = channel);
}
private:
GnomeVFSResult DoOpen();
GnomeVFSResult DoRead(char *aBuf, PRUint32 aCount, PRUint32 *aCountRead);
nsresult SetContentTypeOfChannel(const char *contentType);
private:
nsCString mSpec;
nsIChannel *mChannel; // manually refcounted
GnomeVFSHandle *mHandle;
PRUint32 mBytesRemaining;
nsresult mStatus;
GList *mDirList;
GList *mDirListPtr;
nsCString mDirBuf;
PRUint32 mDirBufCursor;
PRPackedBool mDirOpen;
};
GnomeVFSResult
nsGnomeVFSInputStream::DoOpen()
{
GnomeVFSResult rv;
NS_ASSERTION(mHandle == nsnull, "already open");
// Push a callback handler on the stack for this thread, so we can intercept
// authentication requests from GnomeVFS. We'll use the channel to get a
// nsIAuthPrompt instance.
gnome_vfs_module_callback_push(GNOME_VFS_MODULE_CALLBACK_AUTHENTICATION,
AuthCallback, mChannel, NULL);
// Query the mime type first (this could return NULL).
//
// XXX We need to do this up-front in order to determine how to open the URI.
// Unfortunately, the error code GNOME_VFS_ERROR_IS_DIRECTORY is not
// always returned by gnome_vfs_open when we pass it a URI to a directory!
// Otherwise, we could have used that as a way to failover to opening the
// URI as a directory. Also, it would have been ideal if
// gnome_vfs_get_file_info_from_handle were actually implemented by the
// smb:// module, since that would have allowed us to potentially save a
// round trip to the server to discover the mime type of the document in
// the case where gnome_vfs_open would have been used. (Oh well! /me
// throws hands up in the air and moves on...)
GnomeVFSFileInfo info = {0};
rv = gnome_vfs_get_file_info(mSpec.get(), &info, GNOME_VFS_FILE_INFO_DEFAULT);
if (rv == GNOME_VFS_OK && info.type == GNOME_VFS_FILE_TYPE_DIRECTORY)
{
rv = gnome_vfs_directory_list_load(&mDirList, mSpec.get(),
GNOME_VFS_FILE_INFO_DEFAULT);
LOG(("gnomevfs: gnome_vfs_directory_list_load returned %d (%s) [spec=\"%s\"]\n",
rv, gnome_vfs_result_to_string(rv), mSpec.get()));
}
else
{
rv = gnome_vfs_open(&mHandle, mSpec.get(), GNOME_VFS_OPEN_READ);
LOG(("gnomevfs: gnome_vfs_open returned %d (%s) [spec=\"%s\"]\n",
rv, gnome_vfs_result_to_string(rv), mSpec.get()));
}
gnome_vfs_module_callback_pop(GNOME_VFS_MODULE_CALLBACK_AUTHENTICATION);
if (rv == GNOME_VFS_OK)
{
if (mHandle)
{
// Here we set the content type of the channel to the value of the mime
// type determined by GnomeVFS. However, if GnomeVFS is telling us that
// the document is binary, we'll ignore that and keep the channel's
// content type unspecified. That will enable our content type sniffing
// algorithms. This should provide more consistent mime type handling.
if (info.mime_type && (strcmp(info.mime_type, APPLICATION_OCTET_STREAM) != 0))
SetContentTypeOfChannel(info.mime_type);
// XXX truncates size from 64-bit to 32-bit
mBytesRemaining = (PRUint32) info.size;
// Update the content length attribute on the channel. We do this
// synchronously without proxying. This hack is not as bad as it looks!
if (mBytesRemaining != PR_UINT32_MAX)
mChannel->SetContentLength(mBytesRemaining);
}
else
{
mDirOpen = PR_TRUE;
// Sort mDirList
mDirList = g_list_sort(mDirList, FileInfoComparator);
mDirListPtr = mDirList;
// Write base URL (make sure it ends with a '/')
mDirBuf.Append("300: ");
mDirBuf.Append(mSpec);
if (mSpec.get()[mSpec.Length() - 1] != '/')
mDirBuf.Append('/');
mDirBuf.Append('\n');
// Write column names
mDirBuf.Append("200: filename content-length last-modified file-type\n");
// Write charset (assume UTF-8)
// XXX is this correct?
mDirBuf.Append("301: UTF-8\n");
SetContentTypeOfChannel(APPLICATION_HTTP_INDEX_FORMAT);
}
}
gnome_vfs_file_info_clear(&info);
return rv;
}
GnomeVFSResult
nsGnomeVFSInputStream::DoRead(char *aBuf, PRUint32 aCount, PRUint32 *aCountRead)
{
GnomeVFSResult rv;
if (mHandle)
{
GnomeVFSFileSize bytesRead;
rv = gnome_vfs_read(mHandle, aBuf, aCount, &bytesRead);
if (rv == GNOME_VFS_OK)
{
*aCountRead = (PRUint32) bytesRead;
mBytesRemaining -= *aCountRead;
}
}
else if (mDirOpen)
{
rv = GNOME_VFS_OK;
while (aCount && rv != GNOME_VFS_ERROR_EOF)
{
// Copy data out of our buffer
PRUint32 bufLen = mDirBuf.Length() - mDirBufCursor;
if (bufLen)
{
PRUint32 n = PR_MIN(bufLen, aCount);
memcpy(aBuf, mDirBuf.get() + mDirBufCursor, n);
*aCountRead += n;
aBuf += n;
aCount -= n;
mDirBufCursor += n;
}
if (!mDirListPtr) // Are we at the end of the directory list?
{
rv = GNOME_VFS_ERROR_EOF;
}
else if (aCount) // Do we need more data?
{
GnomeVFSFileInfo *info = (GnomeVFSFileInfo *) mDirListPtr->data;
// Prune '.' and '..' from directory listing.
if (info->name[0] == '.' &&
(info->name[1] == '\0' ||
(info->name[1] == '.' && info->name[2] == '\0')))
{
mDirListPtr = mDirListPtr->next;
continue;
}
mDirBuf.Assign("201: ");
// The "filename" field
nsCString escName;
nsCOMPtr<nsINetUtil> nu = do_GetService(NS_NETUTIL_CONTRACTID);
if (nu) {
nu->EscapeString(nsDependentCString(info->name),
nsINetUtil::ESCAPE_URL_PATH, escName);
mDirBuf.Append(escName);
mDirBuf.Append(' ');
}
// The "content-length" field
// XXX truncates size from 64-bit to 32-bit
mDirBuf.AppendInt(PRInt32(info->size));
mDirBuf.Append(' ');
// The "last-modified" field
//
// NSPR promises: PRTime is compatible with time_t
// we just need to convert from seconds to microseconds
PRExplodedTime tm;
PRTime pt = ((PRTime) info->mtime) * 1000000;
PR_ExplodeTime(pt, PR_GMTParameters, &tm);
{
char buf[64];
PR_FormatTimeUSEnglish(buf, sizeof(buf),
"%a,%%20%d%%20%b%%20%Y%%20%H:%M:%S%%20GMT ", &tm);
mDirBuf.Append(buf);
}
// The "file-type" field
switch (info->type)
{
case GNOME_VFS_FILE_TYPE_REGULAR:
mDirBuf.Append("FILE ");
break;
case GNOME_VFS_FILE_TYPE_DIRECTORY:
mDirBuf.Append("DIRECTORY ");
break;
case GNOME_VFS_FILE_TYPE_SYMBOLIC_LINK:
mDirBuf.Append("SYMBOLIC-LINK ");
break;
default:
break;
}
mDirBuf.Append('\n');
mDirBufCursor = 0;
mDirListPtr = mDirListPtr->next;
}
}
}
else
{
NS_NOTREACHED("reading from what?");
rv = GNOME_VFS_ERROR_GENERIC;
}
return rv;
}
// This class is used to implement SetContentTypeOfChannel.
class nsGnomeVFSSetContentTypeEvent : public nsRunnable
{
public:
nsGnomeVFSSetContentTypeEvent(nsIChannel *channel, const char *contentType)
: mChannel(channel), mContentType(contentType)
{
// stash channel reference in mChannel. no AddRef here! see note
// in SetContentTypeOfchannel.
}
NS_IMETHOD Run()
{
mChannel->SetContentType(mContentType);
return NS_OK;
}
private:
nsIChannel *mChannel;
nsCString mContentType;
};
nsresult
nsGnomeVFSInputStream::SetContentTypeOfChannel(const char *contentType)
{
// We need to proxy this call over to the main thread. We post an
// asynchronous event in this case so that we don't delay reading data, and
// we know that this is safe to do since the channel's reference will be
// released asynchronously as well. We trust the ordering of the main
// thread's event queue to protect us against memory corruption.
nsresult rv;
nsCOMPtr<nsIRunnable> ev =
new nsGnomeVFSSetContentTypeEvent(mChannel, contentType);
if (!ev)
{
rv = NS_ERROR_OUT_OF_MEMORY;
}
else
{
rv = NS_DispatchToMainThread(ev);
}
return rv;
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsGnomeVFSInputStream, nsIInputStream)
NS_IMETHODIMP
nsGnomeVFSInputStream::Close()
{
if (mHandle)
{
gnome_vfs_close(mHandle);
mHandle = nsnull;
}
if (mDirList)
{
// Destroy the list of GnomeVFSFileInfo objects...
g_list_foreach(mDirList, (GFunc) gnome_vfs_file_info_unref, nsnull);
g_list_free(mDirList);
mDirList = nsnull;
mDirListPtr = nsnull;
}
if (mChannel)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIThread> thread = do_GetMainThread();
if (thread)
rv = NS_ProxyRelease(thread, mChannel);
NS_ASSERTION(thread && NS_SUCCEEDED(rv), "leaking channel reference");
mChannel = nsnull;
}
mSpec.Truncate(); // free memory
// Prevent future reads from re-opening the handle.
if (NS_SUCCEEDED(mStatus))
mStatus = NS_BASE_STREAM_CLOSED;
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSInputStream::Available(PRUint32 *aResult)
{
if (NS_FAILED(mStatus))
return mStatus;
*aResult = mBytesRemaining;
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSInputStream::Read(char *aBuf,
PRUint32 aCount,
PRUint32 *aCountRead)
{
*aCountRead = 0;
if (mStatus == NS_BASE_STREAM_CLOSED)
return NS_OK;
if (NS_FAILED(mStatus))
return mStatus;
GnomeVFSResult rv = GNOME_VFS_OK;
// If this is our first-time through here, then open the URI.
if (!mHandle && !mDirOpen)
rv = DoOpen();
if (rv == GNOME_VFS_OK)
rv = DoRead(aBuf, aCount, aCountRead);
if (rv != GNOME_VFS_OK)
{
// If we reach here, we hit some kind of error. EOF is not an error.
mStatus = MapGnomeVFSResult(rv);
if (mStatus == NS_BASE_STREAM_CLOSED)
return NS_OK;
LOG(("gnomevfs: result %d [%s] mapped to 0x%x\n",
rv, gnome_vfs_result_to_string(rv), mStatus));
}
return mStatus;
}
NS_IMETHODIMP
nsGnomeVFSInputStream::ReadSegments(nsWriteSegmentFun aWriter,
void *aClosure,
PRUint32 aCount,
PRUint32 *aResult)
{
// There is no way to implement this using GnomeVFS, but fortunately
// that doesn't matter. Because we are a blocking input stream, Necko
// isn't going to call our ReadSegments method.
NS_NOTREACHED("nsGnomeVFSInputStream::ReadSegments");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsGnomeVFSInputStream::IsNonBlocking(PRBool *aResult)
{
*aResult = PR_FALSE;
return NS_OK;
}
//-----------------------------------------------------------------------------
class nsGnomeVFSProtocolHandler : public nsIProtocolHandler
, public nsIObserver
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIPROTOCOLHANDLER
NS_DECL_NSIOBSERVER
nsresult Init();
private:
void InitSupportedProtocolsPref(nsIPrefBranch *prefs);
PRBool IsSupportedProtocol(const nsCString &spec);
nsCString mSupportedProtocols;
};
NS_IMPL_ISUPPORTS2(nsGnomeVFSProtocolHandler, nsIProtocolHandler, nsIObserver)
nsresult
nsGnomeVFSProtocolHandler::Init()
{
#ifdef PR_LOGGING
sGnomeVFSLog = PR_NewLogModule("gnomevfs");
#endif
if (!gnome_vfs_initialized())
{
if (!gnome_vfs_init())
{
NS_WARNING("gnome_vfs_init failed");
return NS_ERROR_UNEXPECTED;
}
}
nsCOMPtr<nsIPrefBranch2> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
if (prefs)
{
InitSupportedProtocolsPref(prefs);
prefs->AddObserver(MOZ_GNOMEVFS_SUPPORTED_PROTOCOLS, this, PR_FALSE);
}
return NS_OK;
}
void
nsGnomeVFSProtocolHandler::InitSupportedProtocolsPref(nsIPrefBranch *prefs)
{
// read preferences
nsresult rv = prefs->GetCharPref(MOZ_GNOMEVFS_SUPPORTED_PROTOCOLS,
getter_Copies(mSupportedProtocols));
if (NS_SUCCEEDED(rv)) {
mSupportedProtocols.StripWhitespace();
ToLowerCase(mSupportedProtocols);
}
else
mSupportedProtocols.Assign("smb:,sftp:"); // use defaults
LOG(("gnomevfs: supported protocols \"%s\"\n", mSupportedProtocols.get()));
}
PRBool
nsGnomeVFSProtocolHandler::IsSupportedProtocol(const nsCString &aSpec)
{
const char *specString = aSpec.get();
const char *colon = strchr(specString, ':');
if (!colon)
return PR_FALSE;
PRUint32 length = colon - specString + 1;
// <scheme> + ':'
nsCString scheme(specString, length);
char *found = PL_strcasestr(mSupportedProtocols.get(), scheme.get());
if (!found)
return PR_FALSE;
if (found[length] != ',' && found[length] != '\0')
return PR_FALSE;
return PR_TRUE;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::GetScheme(nsACString &aScheme)
{
aScheme.Assign(MOZ_GNOMEVFS_SCHEME);
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::GetDefaultPort(PRInt32 *aDefaultPort)
{
*aDefaultPort = -1;
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::GetProtocolFlags(PRUint32 *aProtocolFlags)
{
// Is URI_STD true of all GnomeVFS URI types?
*aProtocolFlags = URI_STD | URI_DANGEROUS_TO_LOAD;
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::NewURI(const nsACString &aSpec,
const char *aOriginCharset,
nsIURI *aBaseURI,
nsIURI **aResult)
{
const nsCString flatSpec(aSpec);
LOG(("gnomevfs: NewURI [spec=%s]\n", flatSpec.get()));
if (!aBaseURI)
{
//
// XXX This check is used to limit the gnome-vfs protocols we support. For
// security reasons, it is best that we limit the protocols we support to
// those with known characteristics. We might want to lessen this
// restriction if it proves to be too heavy handed. A black list of
// protocols we don't want to support might be better. For example, we
// probably don't want to try to load "start-here:" inside the browser.
// There are others that fall into this category, which are best handled
// externally by Nautilus (or another app like it).
//
if (!IsSupportedProtocol(flatSpec))
return NS_ERROR_UNKNOWN_PROTOCOL;
// Verify that GnomeVFS supports this URI scheme.
GnomeVFSURI *uri = gnome_vfs_uri_new(flatSpec.get());
if (!uri)
return NS_ERROR_UNKNOWN_PROTOCOL;
}
//
// XXX Can we really assume that all gnome-vfs URIs can be parsed using
// nsStandardURL? We probably really need to implement nsIURI/nsIURL
// in terms of the gnome_vfs_uri_XXX methods, but at least this works
// correctly for smb:// URLs ;-)
//
// Also, it might not be possible to fully implement nsIURI/nsIURL in
// terms of GnomeVFSURI since some Necko methods have no GnomeVFS
// equivalent.
//
nsresult rv;
nsCOMPtr<nsIStandardURL> url =
do_CreateInstance(NS_STANDARDURL_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
rv = url->Init(nsIStandardURL::URLTYPE_STANDARD, -1, flatSpec,
aOriginCharset, aBaseURI);
if (NS_SUCCEEDED(rv))
rv = CallQueryInterface(url, aResult);
return rv;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::NewChannel(nsIURI *aURI, nsIChannel **aResult)
{
NS_ENSURE_ARG_POINTER(aURI);
nsresult rv;
nsCAutoString spec;
rv = aURI->GetSpec(spec);
if (NS_FAILED(rv))
return rv;
nsRefPtr<nsGnomeVFSInputStream> stream = new nsGnomeVFSInputStream(spec);
if (!stream)
{
rv = NS_ERROR_OUT_OF_MEMORY;
}
else
{
// start out assuming an unknown content-type. we'll set the content-type
// to something better once we open the URI.
rv = NS_NewInputStreamChannel(aResult, aURI, stream,
NS_LITERAL_CSTRING(UNKNOWN_CONTENT_TYPE));
if (NS_SUCCEEDED(rv))
stream->SetChannel(*aResult);
}
return rv;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::AllowPort(PRInt32 aPort,
const char *aScheme,
PRBool *aResult)
{
// Don't override anything.
*aResult = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsGnomeVFSProtocolHandler::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *aData)
{
if (strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) == 0) {
nsCOMPtr<nsIPrefBranch> prefs = do_QueryInterface(aSubject);
InitSupportedProtocolsPref(prefs);
}
return NS_OK;
}
//-----------------------------------------------------------------------------
#define NS_GNOMEVFSPROTOCOLHANDLER_CID \
{ /* 9b6dc177-a2e4-49e1-9c98-0a8384de7f6c */ \
0x9b6dc177, \
0xa2e4, \
0x49e1, \
{0x9c, 0x98, 0x0a, 0x83, 0x84, 0xde, 0x7f, 0x6c} \
}
NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsGnomeVFSProtocolHandler, Init)
static const nsModuleComponentInfo components[] =
{
{ "nsGnomeVFSProtocolHandler",
NS_GNOMEVFSPROTOCOLHANDLER_CID,
NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX MOZ_GNOMEVFS_SCHEME,
nsGnomeVFSProtocolHandlerConstructor
}
};
NS_IMPL_NSGETMODULE(nsGnomeVFSModule, components)
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