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//
// System.Web.Configuration.HttpHandlersSectionHandler
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2002 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;
using System.Xml;
using System.Globalization;
namespace System.Web.Configuration
{
class HttpHandlersSectionHandler : IConfigurationSectionHandler
{
public virtual object Create (object parent, object configContext, XmlNode section)
{
HandlerFactoryConfiguration mapper;
if (parent is HandlerFactoryConfiguration)
mapper = new HandlerFactoryConfiguration ((HandlerFactoryConfiguration) parent);
else
mapper = new HandlerFactoryConfiguration (null);
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);
mapper.Clear ();
continue;
}
string verb = HandlersUtil.ExtractAttributeValue ("verb", child);
string path = HandlersUtil.ExtractAttributeValue ("path", child);
string validateStr = HandlersUtil.ExtractAttributeValue ("validate", child, true);
bool validate;
if (validateStr == null) {
validate = true;
} else {
#if NET_2_0
validate = "true" == validateStr.ToLower (CultureInfo.InvariantCulture);
if (!validate && "false" != validateStr.ToLower (CultureInfo.InvariantCulture))
#else
validate = validateStr == "true";
if (!validate && validateStr != "false")
#endif
HandlersUtil.ThrowException (
"Invalid value for validate attribute.", child);
}
if (name == "add") {
string type = HandlersUtil.ExtractAttributeValue ("type", child);
if (child.Attributes != null && child.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", child);
mapper.Add (verb, path, type, validate);
continue;
}
if (name == "remove") {
if (child.Attributes != null && child.Attributes.Count != 0)
HandlersUtil.ThrowException ("Unrecognized attribute", child);
if (validate && false == mapper.Remove (verb, path))
HandlersUtil.ThrowException ("There's no mapping to remove", child);
continue;
}
HandlersUtil.ThrowException ("Unexpected element", child);
}
return mapper;
}
}
internal class HandlersUtil
{
HandlersUtil ()
{
}
static internal string ExtractAttributeValue (string attKey, XmlNode node)
{
return ExtractAttributeValue (attKey, node, false);
}
static internal string ExtractAttributeValue (string attKey, XmlNode node, bool optional)
{
return ExtractAttributeValue (attKey, node, optional, false);
}
static internal string ExtractAttributeValue (string attKey, XmlNode node, bool optional,
bool allowEmpty)
{
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 (!allowEmpty && 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);
}
}
}
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