Move URL utilities from ProjectExplorer to Utils

This way we can access them from the qmldebug library.

Change-Id: I90ba80228f44a9d5ea825ad59f4bd1572969980e
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/url.cpp

@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "url.h"
+#include "temporaryfile.h"
+
+#include <QHostAddress>
+#include <QTcpServer>
+
+namespace Utils {
+
+QUrl urlFromLocalHostAndFreePort()
+{
+    QUrl serverUrl;
+    QTcpServer server;
+    serverUrl.setScheme(urlTcpScheme());
+    if (server.listen(QHostAddress::LocalHost) || server.listen(QHostAddress::LocalHostIPv6)) {
+        serverUrl.setHost(server.serverAddress().toString());
+        serverUrl.setPort(server.serverPort());
+    }
+    return serverUrl;
+}
+
+QUrl urlFromLocalSocket()
+{
+    QUrl serverUrl;
+    serverUrl.setScheme(urlSocketScheme());
+    Utils::TemporaryFile file("qtcreator-freesocket");
+    if (file.open())
+        serverUrl.setPath(file.fileName());
+    return serverUrl;
+}
+
+QString urlSocketScheme()
+{
+    return QString("socket");
+}
+
+QString urlTcpScheme()
+{
+    return QString("tcp");
+}
+
+}