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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H__
#define CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H__
#include "chrome/common/pref_service.h"
class GURL;
class MessageLoop;
class ExternalProtocolHandler {
public:
enum BlockState {
DONT_BLOCK,
BLOCK,
UNKNOWN,
};
// Returns whether we should block a given scheme.
static BlockState GetBlockState(const std::wstring& scheme);
// Checks to see if the protocol is allowed, if it is whitelisted,
// the application associated with the protocol is launched on the io thread,
// if it is blacklisted, returns silently. Otherwise, an
// ExternalProtocolDialog is created asking the user. If the user accepts,
// LaunchUrlWithoutSecurityCheck is called on the io thread and the
// application is launched.
// Must run on the UI thread.
static void LaunchUrl(const GURL& url, int render_process_host_id,
int tab_contents_id);
// Register the ExcludedSchemes preference.
static void RegisterPrefs(PrefService* prefs);
// Starts a url using the external protocol handler with the help
// of shellexecute. Should only be called if the protocol is whitelisted
// (checked in LaunchUrl) or if the user explicitly allows it. (By selecting
// "Launch Application" in an ExternalProtocolDialog.) It is assumed that the
// url has already been escaped, which happens in LaunchUrl.
// NOTE: You should Not call this function directly unless you are sure the
// url you have has been checked against the blacklist, and has been escaped.
// All calls to this function should originate in some way from LaunchUrl.
// Must run on the IO thread.
static void LaunchUrlWithoutSecurityCheck(const GURL& url);
// Prepopulates the dictionary with known protocols to deny or allow, if
// preferences for them do not already exist.
static void PrepopulateDictionary(DictionaryValue* win_pref);
};
#endif // CHROME_BROWSER_EXTERNAL_PROTOCOL_HANDLER_H__
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