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authorJeremy Lainé <jeremy.laine@m4x.org>2012-01-23 18:25:39 +0100
committerQt by Nokia <qt-info@nokia.com>2012-01-30 16:39:46 +0100
commite54dc7c2b5b9aa14989f26a718eb99d7516af4a0 (patch)
tree248372c55bede52c63ab0cc367cdfc8c350ba619 /doc/src/snippets/code/src_network_kernel_qdnslookup.cpp
parentd9468a975210ecb58ff199e931f47df5b99b267f (diff)
Add support for DNS lookups using native APIs
The QDnsLookup class provides asynchronous APIs for performing DNS lookups. For now, the following lookups are supported: - A and AAAA - CNAME as defined per RFC 1035 - MX as defined per RFC 1035 - NS as defined per RFC 1035 - PTR as defined per RFC 1035 - SRV as defined per RFC 2782 - TXT as defined per RFC 1035 Task-number: QTBUG-10481 Change-Id: I46c1741ec23615863eeca3a1231d5e3f8942495e Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'doc/src/snippets/code/src_network_kernel_qdnslookup.cpp')
-rw-r--r--doc/src/snippets/code/src_network_kernel_qdnslookup.cpp73
1 files changed, 73 insertions, 0 deletions
diff --git a/doc/src/snippets/code/src_network_kernel_qdnslookup.cpp b/doc/src/snippets/code/src_network_kernel_qdnslookup.cpp
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+++ b/doc/src/snippets/code/src_network_kernel_qdnslookup.cpp
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Jeremy Lainé <jeremy.laine@m4x.org>
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "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 Nokia Corporation and its Subsidiary(-ies) 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+void MyObject::lookupServers()
+{
+ // Create a DNS lookup.
+ dns = new QDnsLookup(this);
+ connect(dns, SIGNAL(finished()),
+ this, SLOT(handleServers()));
+
+ // Find the XMPP servers for gmail.com
+ dns->setType(QDnsLookup::SRV);
+ dns->setName("_xmpp-client._tcp.gmail.com");
+ dns->lookup();
+}
+//! [0]
+
+
+//! [1]
+void MyObject::handleServers()
+{
+ // Check the lookup succeeded.
+ if (dns->error() != QDnsLookup::NoError) {
+ qWarning("DNS lookup failed");
+ dns->deleteLater();
+ return;
+ }
+
+ // Handle the results.
+ foreach (const QDnsServiceRecord &record, dns->serviceRecords()) {
+ ...
+ }
+ dns->deleteLater();
+}
+//! [1]