//
// Copyright (c) 2004-2006 Jaroslaw Kowalski <jaak@jkowalski.net>
//
// 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.
//
// * Neither the name of Jaroslaw Kowalski 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.
//
#if !NETCF
using System;
using System.Text;
using System.Web;
namespace NLog.LayoutRenderers
{
/// <summary>
/// ASP.NET Request variable
/// </summary>
[LayoutRenderer("aspnet-request")]
public class ASPNETRequestValueLayoutRenderer : LayoutRenderer
{
private string _queryStringKey;
private string _formKey;
private string _cookie;
private string _item;
private string _serverVariable;
/// <summary>
/// The item name. The QueryString, Form, Cookies, or ServerVariables collection variables having the specified name are rendered.
/// </summary>
public string Item
{
get
{
return _item;
}
set
{
_item = value;
}
}
/// <summary>
/// The QueryString variable to be rendered.
/// </summary>
public string QueryString
{
get
{
return _queryStringKey;
}
set
{
_queryStringKey = value;
}
}
/// <summary>
/// The form variable to be rendered.
/// </summary>
public string Form
{
get
{
return _formKey;
}
set
{
_formKey = value;
}
}
/// <summary>
/// The cookie to be rendered.
/// </summary>
public string Cookie
{
get
{
return _cookie;
}
set
{
_cookie = value;
}
}
/// <summary>
/// The ServerVariables item to be rendered.
/// </summary>
public string ServerVariable
{
get
{
return _serverVariable;
}
set
{
_serverVariable = value;
}
}
/// <summary>
/// Returns the estimated number of characters that are needed to
/// hold the rendered value for the specified logging event.
/// </summary>
/// <param name="logEvent">Logging event information.</param>
/// <returns>The number of characters.</returns>
/// <remarks>
/// If the exact number is not known or
/// expensive to calculate this function should return a rough estimate
/// that's big enough in most cases, but not too big, in order to conserve memory.
/// </remarks>
protected internal override int GetEstimatedBufferSize(LogEventInfo logEvent)
{
return 64;
}
/// <summary>
/// Renders the specified ASP.NET Request variable and appends it to the specified <see cref="StringBuilder" />.
/// </summary>
/// <param name="builder">The <see cref="StringBuilder"/> to append the rendered data to.</param>
/// <param name="logEvent">Logging event.</param>
protected internal override void Append(StringBuilder builder, LogEventInfo logEvent)
{
HttpContext context = HttpContext.Current;
if (context == null)
return ;
if (context.Request == null)
return ;
if (QueryString != null)
{
builder.Append(context.Request.QueryString[QueryString]);
}
else if (Form != null)
{
builder.Append(context.Request.Form[Form]);
}
else if (Cookie != null)
{
HttpCookie cookie = context.Request.Cookies[Cookie];
if (cookie != null)
builder.Append(cookie.Value);
}
else if (ServerVariable != null)
{
builder.Append(context.Request.ServerVariables[ServerVariable]);
}
else if (Item != null)
{
builder.Append(context.Request[Item]);
}
}
}
}
#endif