path: root/embed/mozilla/EphyContentPolicy.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 *  Copyright (C) 2003 Christian Persch
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *  $Id$
 */

#include "mozilla-config.h"

#include "config.h"

#include "EphyContentPolicy.h"

#include "ephy-embed-shell.h"
#include "ephy-embed-single.h"
#include "eel-gconf-extensions.h"
#include "ephy-debug.h"

#include <nsCOMPtr.h>
#include <nsIURI.h>
#define MOZILLA_STRICT_API
#include <nsEmbedString.h>
#undef MOZILLA_STRICT_API

#define CONF_LOCKDOWN_DISABLE_UNSAFE_PROTOCOLS  "/apps/epiphany/lockdown/disable_unsafe_protocols"
#define CONF_LOCKDOWN_ADDITIONAL_SAFE_PROTOCOLS "/apps/epiphany/lockdown/additional_safe_protocols"

NS_IMPL_ISUPPORTS1(EphyContentPolicy, nsIContentPolicy)

EphyContentPolicy::EphyContentPolicy()
{
    LOG ("EphyContentPolicy ctor (%p)", this)

    mLocked = eel_gconf_get_boolean (CONF_LOCKDOWN_DISABLE_UNSAFE_PROTOCOLS);

    mSafeProtocols = eel_gconf_get_string_list (CONF_LOCKDOWN_ADDITIONAL_SAFE_PROTOCOLS);
    mSafeProtocols = g_slist_prepend (mSafeProtocols, g_strdup ("https"));
    mSafeProtocols = g_slist_prepend (mSafeProtocols, g_strdup ("http"));

    mEmbedSingle = ephy_embed_shell_get_embed_single (embed_shell);
    g_return_if_fail (mEmbedSingle);
}

EphyContentPolicy::~EphyContentPolicy()
{
    LOG ("EphyContentPolicy dtor (%p)", this)

    g_slist_foreach (mSafeProtocols, (GFunc) g_free, NULL);
    g_slist_free (mSafeProtocols);
}

#if MOZ_NSICONTENTPOLICY_VARIANT == 2
NS_IMETHODIMP
EphyContentPolicy::ShouldLoad(PRUint32 aContentType,
                  nsIURI *aContentLocation,
                  nsIURI *aRequestingLocation,
                  nsISupports *aContext,
                  const nsACString &aMimeTypeGuess,
                  nsISupports *aExtra,
                  PRInt16 *aDecision)
{
    NS_ENSURE_ARG (aContentLocation);

    nsEmbedCString contentScheme;
    aContentLocation->GetScheme (contentScheme);

    nsEmbedCString contentSpec;
    aContentLocation->GetSpec (contentSpec);

    /* first general lockdown check */
    if (mLocked &&
        !g_slist_find_custom (mSafeProtocols, contentScheme.get(), (GCompareFunc) strcmp) &&
        strcmp (contentSpec.get(), "about:blank") != 0)
    {
        *aDecision = nsIContentPolicy::REJECT_REQUEST;
        return NS_OK;
    }

    nsEmbedCString requestingSpec;
    if (aRequestingLocation)
    {
        aRequestingLocation->GetSpec (requestingSpec);
    }

    gboolean result = FALSE;
    g_signal_emit_by_name (mEmbedSingle, "check-content",
                   (EphyContentCheckType) aContentType,
                   contentSpec.get(),
                   requestingSpec.get(),
                   nsEmbedCString(aMimeTypeGuess).get(),
                   &result);

    if (result)
    {
        *aDecision = nsIContentPolicy::REJECT_REQUEST;
    }
    else
    {
        *aDecision = nsIContentPolicy::ACCEPT;
    }

    return NS_OK;
}

NS_IMETHODIMP
EphyContentPolicy::ShouldProcess(PRUint32 aContentType,
                     nsIURI *aContentLocation,
                     nsIURI *aRequestingLocation,
                 nsISupports *aContext,
                     const nsACString &aMimeType,
                     nsISupports *aExtra,
                     PRInt16 *aDecision)
{
    *aDecision = nsIContentPolicy::ACCEPT;
    return NS_OK;
}

#else

/* boolean shouldLoad (in PRInt32 contentType, in nsIURI contentLocation, in nsISupports ctxt, in nsIDOMWindow window); */
NS_IMETHODIMP EphyContentPolicy::ShouldLoad(PRInt32 aContentType,
                        nsIURI *aContentLocation,
                        nsISupports *aContext,
                        nsIDOMWindow *aWindow,
                        PRBool *_retval)
{
    NS_ENSURE_ARG (aContentLocation);

    nsEmbedCString contentScheme;
    aContentLocation->GetScheme (contentScheme);

    nsEmbedCString contentSpec;
    aContentLocation->GetSpec (contentSpec);

    /* first general lockdown check */
    if (mLocked &&
        !g_slist_find_custom (mSafeProtocols, contentScheme.get(), (GCompareFunc) strcmp) &&
        strcmp (contentSpec.get(), "about:blank") != 0)
    {
        *_retval = PR_FALSE;
        return NS_OK;
    }

    /* translate to variant-2 types */
    EphyContentCheckType type;
    switch (aContentType)
    {
        case nsIContentPolicy::SCRIPT:
            type = EPHY_CONTENT_CHECK_TYPE_SCRIPT;
            break;
        case nsIContentPolicy::IMAGE:
            type = EPHY_CONTENT_CHECK_TYPE_IMAGE;
            break;
        case nsIContentPolicy::STYLESHEET:
            type = EPHY_CONTENT_CHECK_TYPE_STYLESHEET;
            break;
        case nsIContentPolicy::OBJECT:
            type = EPHY_CONTENT_CHECK_TYPE_OBJECT;
            break;
        case nsIContentPolicy::SUBDOCUMENT:
            type = EPHY_CONTENT_CHECK_TYPE_SUBDOCUMENT;
            break;
        case nsIContentPolicy::CONTROL_TAG:
            type = EPHY_CONTENT_CHECK_TYPE_REFRESH;
            break;
        case nsIContentPolicy::DOCUMENT:
            type = EPHY_CONTENT_CHECK_TYPE_DOCUMENT;
            break;
        case nsIContentPolicy::OTHER:
        case nsIContentPolicy::RAW_URL:
        default:
            type = EPHY_CONTENT_CHECK_TYPE_OTHER;
            break;
    }

    gboolean result = FALSE;
    g_signal_emit_by_name (mEmbedSingle, "check-content",
                   type,
                   contentSpec.get(),
                   "",
                   "",
                   &result);

    *_retval = !result;

    return NS_OK;
}

/* boolean shouldProcess (in PRInt32 contentType, in nsIURI documentLocation, in nsISupports ctxt, in nsIDOMWindow window); */
NS_IMETHODIMP EphyContentPolicy::ShouldProcess(PRInt32 contentType,
                           nsIURI *documentLocation,
                           nsISupports *ctxt,
                           nsIDOMWindow *window,
                           PRBool *_retval)
{
    /* This is never called. */
    LOG ("ShouldProcess: this is quite unexpected!")

    *_retval = PR_TRUE;
    return NS_OK;
}
#endif /* MOZ_NSICONTENTPOLICY_VARIANT == 2 */