xenadmin/XenModel/Actions/Updates/DownloadUpdatesXmlAction.cs

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/* Copyright (c) Citrix Systems 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.
*
* 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 HOLDER 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.
*/
using System;
using System.Collections.Generic;
using System.Linq;
using XenAPI;
using System.IO;
using System.Xml;
using XenAdmin.Core;
using System.Diagnostics;
namespace XenAdmin.Actions
{
public class DownloadUpdatesXmlAction : AsyncAction
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
private const string XenCenterVersionsNode = "xencenterversions";
private const string XenServerVersionsNode = "serverversions";
private const string PatchesNode = "patches";
private const string ConflictingPatchesNode = "conflictingpatches";
private const string RequiredPatchesNode = "requiredpatches";
private const string ConflictingPatchNode = "conflictingpatch";
private const string RequiredPatchNode = "requiredpatch";
public List<XenCenterVersion> XenCenterVersions { get; private set; }
public List<XenServerVersion> XenServerVersions { get; private set; }
public List<XenServerPatch> XenServerPatches { get; private set; }
public List<XenServerVersion> XenServerVersionsForAutoCheck
{
get
{
if(_checkForServerVersion)
{
return XenServerVersions;
}
return new List<XenServerVersion>();
}
}
private readonly bool _checkForXenCenter;
private readonly bool _checkForServerVersion;
private readonly bool _checkForPatches;
private readonly string _checkForUpdatesUrl;
public DownloadUpdatesXmlAction(bool checkForXenCenter, bool checkForServerVersion, bool checkForPatches, string checkForUpdatesUrl)
: base(null, "_get_updates", "_get_updates", true)
{
Debug.Assert(checkForUpdatesUrl != null, "Parameter checkForUpdatesUrl should not be null. This class does not default its value anymore.");
XenServerPatches = new List<XenServerPatch>();
XenServerVersions = new List<XenServerVersion>();
XenCenterVersions = new List<XenCenterVersion>();
_checkForXenCenter = checkForXenCenter;
_checkForServerVersion = checkForServerVersion;
_checkForPatches = checkForPatches;
_checkForUpdatesUrl = checkForUpdatesUrl;
}
protected DownloadUpdatesXmlAction(bool checkForXenCenter, bool checkForServerVersion, bool checkForPatches)
: this(checkForXenCenter, checkForServerVersion, checkForPatches, null)
{ }
protected override void Run()
{
this.Description = Messages.AVAILABLE_UPDATES_SEARCHING;
XmlDocument xdoc = FetchCheckForUpdatesXml(_checkForUpdatesUrl);
GetXenCenterVersions(xdoc);
GetXenServerPatches(xdoc);
GetXenServerVersions(xdoc);
}
private void GetXenCenterVersions(XmlDocument xdoc)
{
if (!_checkForXenCenter)
return;
foreach (XmlNode versions in xdoc.GetElementsByTagName(XenCenterVersionsNode))
{
foreach (XmlNode version in versions.ChildNodes)
{
string version_lang = "";
string name = "";
bool is_latest = false;
string url = "";
string timestamp = "";
foreach (XmlAttribute attrib in version.Attributes)
{
if (attrib.Name == "value")
version_lang = attrib.Value;
else if (attrib.Name == "name")
name = attrib.Value;
else if (attrib.Name == "latest")
is_latest = attrib.Value.ToUpperInvariant() == bool.TrueString.ToUpperInvariant();
else if (attrib.Name == "url")
url = attrib.Value;
else if (attrib.Name == "timestamp")
timestamp = attrib.Value;
}
XenCenterVersions.Add(new XenCenterVersion(version_lang, name, is_latest, url, timestamp));
}
}
}
private void GetXenServerPatches(XmlDocument xdoc)
{
if (!_checkForPatches)
return;
foreach (XmlNode versions in xdoc.GetElementsByTagName(PatchesNode))
{
foreach (XmlNode version in versions.ChildNodes)
{
string uuid = "";
string name = "";
string description = "";
string guidance = "";
string guidance_mandatory = "";
string patchVersion = "";
string url = "";
string patchUrl = "";
string timestamp = "";
string priority = "";
string installationSize = "";
foreach (XmlAttribute attrib in version.Attributes)
{
if (attrib.Name == "uuid")
uuid = attrib.Value;
else if (attrib.Name == "name-label")
name = attrib.Value;
else if (attrib.Name == "name-description")
description = attrib.Value;
else if (attrib.Name == "after-apply-guidance")
guidance = attrib.Value;
else if (attrib.Name == "guidance-mandatory")
guidance_mandatory = attrib.Value;
else if (attrib.Name == "version")
patchVersion = attrib.Value;
else if (attrib.Name == "url")
url = attrib.Value;
else if (attrib.Name == "patch-url")
patchUrl = attrib.Value;
else if (attrib.Name == "timestamp")
timestamp = attrib.Value;
else if (attrib.Name == "priority")
priority = attrib.Value;
else if (attrib.Name == "installation-size")
installationSize = attrib.Value;
}
var conflictingPatches = GetPatchDependencies(version, ConflictingPatchesNode, ConflictingPatchNode);
var requiredPatches = GetPatchDependencies(version, RequiredPatchesNode, RequiredPatchNode);
XenServerPatches.Add(new XenServerPatch(uuid, name, description, guidance, guidance_mandatory, patchVersion, url,
patchUrl, timestamp, priority, installationSize, conflictingPatches, requiredPatches));
}
}
}
// dependencies patches are listed in the xml as below:
// <conflictingpatches>
// <conflictingpatch uuid="00000000-0000-0000-0000-000000000000">
// </conflictingpatch>
// </conflictingpatches>
// <requiredpatches>
// <requiredgpatch uuid="00000000-0000-0000-0000-000000000000">
// </requiredgpatch>
// </requiredpatches>
private static List<string> GetPatchDependencies(XmlNode patchsNode, string dependenciesNodeName, string dependencyNodeName)
{
var dependenciesNode = patchsNode.ChildNodes.Cast<XmlNode>().FirstOrDefault(childNode => childNode.Name == dependenciesNodeName);
if (dependenciesNode == null)
return null;
var dependencies = new List<string>();
dependencies.AddRange(from XmlNode node in dependenciesNode.ChildNodes
where node.Attributes != null
from XmlAttribute attrib in node.Attributes
where node.Name == dependencyNodeName && node.Attributes != null && attrib.Name == "uuid"
select attrib.Value);
return dependencies;
}
private void GetXenServerVersions(XmlDocument xdoc)
{
if (!_checkForServerVersion && !_checkForPatches)
return;
foreach (XmlNode versions in xdoc.GetElementsByTagName(XenServerVersionsNode))
{
foreach (XmlNode version in versions.ChildNodes)
{
string version_oem = "";
string name = "";
bool is_latest = false;
string url = "";
string timestamp = "";
string buildNumber = "";
foreach (XmlAttribute attrib in version.Attributes)
{
if (attrib.Name == "value")
version_oem = attrib.Value;
else if (attrib.Name == "name")
name = attrib.Value;
else if (attrib.Name == "latest")
is_latest = attrib.Value.ToUpperInvariant() == bool.TrueString.ToUpperInvariant();
else if (attrib.Name == "url")
url = attrib.Value;
else if (attrib.Name == "timestamp")
timestamp = attrib.Value;
else if (attrib.Name == "build-number")
buildNumber = attrib.Value;
}
List<XenServerPatch> patches = new List<XenServerPatch>();
List<XenServerPatch> minimalPatches = new List<XenServerPatch>();
foreach (XmlNode childnode in version.ChildNodes)
{
if (childnode.Name == "minimalpatches")
{
foreach (XmlNode minimalpatch in childnode.ChildNodes)
{
if (minimalpatch.Name != "patch")
continue;
XenServerPatch mp = XenServerPatches.Find(p => string.Equals(p.Uuid, minimalpatch.Attributes["uuid"].Value, StringComparison.OrdinalIgnoreCase));
if (mp == null)
continue;
minimalPatches.Add(mp);
}
}
if (childnode.Name == "patch")
{
XenServerPatch patch = XenServerPatches.Find(item => string.Equals(item.Uuid, childnode.Attributes["uuid"].Value, StringComparison.OrdinalIgnoreCase));
if (patch == null)
continue;
patches.Add(patch);
}
}
XenServerVersions.Add(new XenServerVersion(version_oem, name, is_latest, url, patches, minimalPatches, timestamp,
buildNumber));
}
}
}
protected virtual XmlDocument FetchCheckForUpdatesXml(string location)
{
var xdoc = new XmlDocument();
var uri = new Uri(location);
if (uri.IsFile)
{
xdoc.Load(location);
}
else
{
using (Stream xmlstream = HTTPHelper.GET(new Uri(location), Connection, false, true))
{
xdoc = Helpers.LoadXmlDocument(xmlstream);
}
}
return xdoc;
}
}
}