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//
// System.Net.Configuration.ConnectionManagementHandler
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ximian, Inc (http://www.ximian.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections;
using System.Configuration;
#if (XML_DEP)
using System.Xml;
#else
using XmlNode = System.Object;
#endif
#pragma warning disable 618
namespace System.Net.Configuration
{
class ConnectionManagementData
{
Hashtable data; // key -> address, value -> maxconnections
const int defaultMaxConnections = 2;
public ConnectionManagementData (object parent)
{
data = new Hashtable (CaseInsensitiveHashCodeProvider.DefaultInvariant,
CaseInsensitiveComparer.DefaultInvariant);
if (parent != null && parent is ConnectionManagementData) {
ConnectionManagementData p = (ConnectionManagementData) parent;
foreach (string k in p.data.Keys)
data [k] = p.data [k];
}
}
public void Add (string address, string nconns)
{
if (nconns == null || nconns == "")
nconns = "2";
// Adding duplicates works fine under MS, so...
data [address] = UInt32.Parse (nconns);
}
public void Add (string address, int nconns)
{
data [address] = (uint) nconns;
}
public void Remove (string address)
{
// Removing non-existent address is fine.
data.Remove (address);
}
public void Clear ()
{
data.Clear ();
}
public uint GetMaxConnections (string hostOrIP)
{
object o = data [hostOrIP];
if (o == null)
o = data ["*"];
if (o == null)
return defaultMaxConnections;
return (uint) o;
}
public Hashtable Data {
get { return data; }
}
}
class ConnectionManagementHandler : IConfigurationSectionHandler
{
public virtual object Create (object parent, object configContext, XmlNode section)
{
ConnectionManagementData cmd = new ConnectionManagementData (parent);
#if (XML_DEP)
if (section.Attributes != null && section.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", section);
XmlNodeList httpHandlers = section.ChildNodes;
foreach (XmlNode child in httpHandlers) {
XmlNodeType ntype = child.NodeType;
if (ntype == XmlNodeType.Whitespace || ntype == XmlNodeType.Comment)
continue;
if (ntype != XmlNodeType.Element)
HandlersUtil.ThrowException ("Only elements allowed", child);
string name = child.Name;
if (name == "clear") {
if (child.Attributes != null && child.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", child);
cmd.Clear ();
continue;
}
//LAMESPEC: the MS doc says that <remove name="..."/> but they throw an exception
// if you use that. "address" is correct.
string address = HandlersUtil.ExtractAttributeValue ("address", child);
if (name == "add") {
string maxcnc = HandlersUtil.ExtractAttributeValue ("maxconnection", child, true);
if (child.Attributes != null && child.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", child);
cmd.Add (address, maxcnc);
continue;
}
if (name == "remove") {
if (child.Attributes != null && child.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", child);
cmd.Remove (address);
continue;
}
HandlersUtil.ThrowException ("Unexpected element", child);
}
#endif
return cmd;
}
}
internal class HandlersUtil
{
private HandlersUtil ()
{
}
#if (XML_DEP)
static internal string ExtractAttributeValue (string attKey, XmlNode node)
{
return ExtractAttributeValue (attKey, node, false);
}
static internal string ExtractAttributeValue (string attKey, XmlNode node, bool optional)
{
if (node.Attributes == null) {
if (optional)
return null;
ThrowException ("Required attribute not found: " + attKey, node);
}
XmlNode att = node.Attributes.RemoveNamedItem (attKey);
if (att == null) {
if (optional)
return null;
ThrowException ("Required attribute not found: " + attKey, node);
}
string value = att.Value;
if (value == String.Empty) {
string opt = optional ? "Optional" : "Required";
ThrowException (opt + " attribute is empty: " + attKey, node);
}
return value;
}
static internal void ThrowException (string msg, XmlNode node)
{
if (node != null && node.Name != String.Empty)
msg = msg + " (node name: " + node.Name + ") ";
throw new ConfigurationException (msg, node);
}
#endif
}
}
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