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//------------------------------------------------------------------------------
// <copyright file="ProcessHostSupportFunctionsExtensions.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Hosting {
using System;
using System.Text;
using System.Web.Util;
internal static class ProcessHostSupportFunctionsExtensions {
// Use this instead of MapPath, as it encapsulates the correct way to invoke
// the MapPath method. Didn't bother much with efficiency since it's called
// so few times.
//
// Example inputs: MapPathInternal(appId, "/appVPath", "/bin/foo.dll");
public static string MapPathInternal(this IProcessHostSupportFunctions supportFunctions, string appId, string appVirtualPath, string relativePath) {
Debug.Assert(supportFunctions != null);
Debug.Assert(!String.IsNullOrWhiteSpace(appId));
Debug.Assert(!String.IsNullOrWhiteSpace(appVirtualPath) && appVirtualPath[0] == '/');
Debug.Assert(relativePath != null);
StringBuilder fullVirtualPath = new StringBuilder(appVirtualPath.Length + relativePath.Length + 2 /* for slashes */);
// Ensure the app virtual path is always preceded by a slash
if (appVirtualPath[0] != '/') {
fullVirtualPath.Append('/');
}
fullVirtualPath.Append(appVirtualPath);
// Ensure the app virtual path always ends with a slash
if (fullVirtualPath[fullVirtualPath.Length - 1] != '/') {
fullVirtualPath.Append('/');
}
// Append the relative path, removing the preceding slash if necessary
if (relativePath.Length > 0) {
if (relativePath[0] == '/') {
fullVirtualPath.Append(relativePath, 1, relativePath.Length - 1);
}
else {
fullVirtualPath.Append(relativePath);
}
}
string physicalPath;
supportFunctions.MapPath(appId, fullVirtualPath.ToString(), out physicalPath);
return physicalPath;
}
}
}
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