53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
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// Copyright (c) 2011 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include "external_protocol_handler.h"
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#include "base/utf_string_conversions.h"
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#include "base/win/registry.h"
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#include "googleurl/src/gurl.h"
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#include <shellapi.h>
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namespace ExternalProtocolHandler {
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// According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
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// "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
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// ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
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// support URLS of 2083 chars in length, 2K is safe."
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const int kMaxAddressLengthChars = 2048;
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bool HasExternalHandler(const std::string& scheme) {
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base::win::RegKey key;
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const std::wstring registry_path =
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ASCIIToWide(scheme + "\\shell\\open\\command");
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key.Open(HKEY_CLASSES_ROOT, registry_path.c_str(), KEY_READ);
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if (key.Valid()) {
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DWORD size = 0;
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key.ReadValue(NULL, NULL, &size, NULL);
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if (size > 2) {
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// ShellExecute crashes the process when the command is empty.
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// We check for "2" because it always returns the trailing NULL.
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return true;
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}
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}
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return false;
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}
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bool HandleExternalProtocol(const GURL& gurl) {
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if (!HasExternalHandler(gurl.scheme()))
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return false;
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const std::string& address = gurl.spec();
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if (address.length() > kMaxAddressLengthChars)
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return false;
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ShellExecuteA(NULL, "open", address.c_str(), NULL, NULL, SW_SHOWNORMAL);
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return true;
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}
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} // namespace ExternalProtocolHandler
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