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//
// System.Net.Configuration.DefaultProxyHandler
//
// 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
namespace System.Net.Configuration
{
class DefaultProxyHandler : IConfigurationSectionHandler
{
public virtual object Create (object parent, object configContext, XmlNode section)
{
IWebProxy result = parent as IWebProxy;
#if (XML_DEP)
if (section.Attributes != null && section.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", section);
XmlNodeList nodes = section.ChildNodes;
foreach (XmlNode child in nodes) {
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 == "proxy") {
string sysdefault = HandlersUtil.ExtractAttributeValue ("usesystemdefault", child, true);
string bypass = HandlersUtil.ExtractAttributeValue ("bypassonlocal", child, true);
string address = HandlersUtil.ExtractAttributeValue ("proxyaddress", child, true);
if (child.Attributes != null && child.Attributes.Count != 0) {
HandlersUtil.ThrowException ("Unrecognized attribute", child);
}
result = new WebProxy ();
bool bp = (bypass != null && String.Compare (bypass, "true", true) == 0);
if (bp == false) {
if (bypass != null && String.Compare (bypass, "false", true) != 0)
HandlersUtil.ThrowException ("Invalid boolean value", child);
}
if (!(result is WebProxy))
continue;
((WebProxy) result).BypassProxyOnLocal = bp;
if (address != null)
try {
((WebProxy) result).Address = new Uri (address);
continue;
} catch (UriFormatException) {} //MS: ignore bad URIs, fall through to default
//MS: presence of valid address URI takes precedence over usesystemdefault
if (sysdefault != null && String.Compare (sysdefault, "true", true) == 0) {
address = Environment.GetEnvironmentVariable ("http_proxy");
if (address == null)
address = Environment.GetEnvironmentVariable ("HTTP_PROXY");
if (address != null) {
try {
Uri uri = new Uri (address);
IPAddress ip;
if (IPAddress.TryParse (uri.Host, out ip)) {
if (IPAddress.Any.Equals (ip)) {
UriBuilder builder = new UriBuilder (uri);
builder.Host = "127.0.0.1";
uri = builder.Uri;
} else if (IPAddress.IPv6Any.Equals (ip)) {
UriBuilder builder = new UriBuilder (uri);
builder.Host = "[::1]";
uri = builder.Uri;
}
}
((WebProxy) result).Address = uri;
} catch (UriFormatException) { }
}
}
continue;
}
if (name == "bypasslist") {
if (!(result is WebProxy))
continue;
FillByPassList (child, (WebProxy) result);
continue;
}
if (name == "module") {
HandlersUtil.ThrowException ("WARNING: module not implemented yet", child);
}
HandlersUtil.ThrowException ("Unexpected element", child);
}
#endif
return result;
}
#if (XML_DEP)
static void FillByPassList (XmlNode node, WebProxy proxy)
{
ArrayList bypass = new ArrayList (proxy.BypassArrayList);
if (node.Attributes != null && node.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", node);
XmlNodeList nodes = node.ChildNodes;
foreach (XmlNode child in nodes) {
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 == "add") {
string address = HandlersUtil.ExtractAttributeValue ("address", child);
if (!bypass.Contains (address)) {
bypass.Add (address);
}
continue;
}
if (name == "remove") {
string address = HandlersUtil.ExtractAttributeValue ("address", child);
bypass.Remove (address);
continue;
}
if (name == "clear") {
if (node.Attributes != null && node.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", node);
bypass.Clear ();
continue;
}
HandlersUtil.ThrowException ("Unexpected element", child);
}
proxy.BypassList = (string []) bypass.ToArray (typeof (string));
}
#endif
}
}
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