项目中需要使用到路径处理的地方比较多，对于路径的解析和匹配有时较为繁琐，现在提供一个对路径进行解析的方法：
1.验证设置路径字符串：
代码语言：javascript复制 /// <summary>
/// 验证设置路径字符串
/// </summary>
/// <param name="path">路径字符串</param>
/// <param name="isSequential">如果正在创建路径</param>
static public void ValidatePath(string path, bool isSequential)
{
ValidatePath(isSequential ? path "1" : path);
}
/// <summary>
/// 验证设置路径字符串
/// </summary>
/// <param name="path">路径字符串</param>
/// <exception cref="ArgumentException">路径无效</exception>
static public void ValidatePath(string path)
{
if (path == null)
throw new ArgumentException("路径不能为空");
if (path.Length == 0)
throw new ArgumentException("路径长度必须大于0");
if (path[0] != '/')
throw new ArgumentException("路径必须启动/字符");
if (path.Length == 1) return;
if (path[path.Length - 1] == '/')
throw new ArgumentException("路径不能结束与/字符");
string reason = null;
var lastc = '/';
var chars = path.ToCharArray();
for (var i = 1; i < chars.Length; lastc = chars[i], i )
{
var c = chars[i];
if (c == 0) { reason = "不允许空字符 @" i; break; }
if (c == '/' && lastc == '/') { reason = "指定的空节点名称@" i; break; }
if (c == '.' && lastc == '.')
{
if (chars[i - 2] != '/' || ((i 1 != chars.Length) && chars[i 1] != '/')) continue;
reason = "不允许的相对路径 @" i;
break;
}
if (c == '.')
{
if (chars[i - 1] != '/' || ((i 1 != chars.Length) && chars[i 1] != '/')) continue;
reason = "不允许的相对路径 @" i;
break;
}
if ((c <= 'u0000' || c >= 'u001f') && (c <= 'u007f' || c >= 'u009F') &&
(c <= 'ud800' || c >= 'uf8ff') && (c <= 'ufff0' || c >= 'uffff')) continue;
reason = "无效的字符 @" i;
break;
}
if (reason != null) throw new ArgumentException(string.Format("无效的路径字符串 "{0}" 引起的 {1}", path, reason));
}2.查看服务器的路径：
代码语言：javascript复制 /// <summary>
/// 在目录到客户端的路径（如果有的话）。期望
///此功能是客户端路径已在此之前验证
////调用/函数调用
/// </summary>
/// <param name="chroot"></param>
/// <param name="clientPath">节点的路径。</param>
/// <returns>查看服务器的路径（chroot添加到客户端的路径）</returns>
static public string PrependChroot(string chroot, string clientPath)
{
if (string.IsNullOrEmpty(chroot)) return clientPath;
return clientPath.Length == 1 ? chroot : string.Concat(chroot, clientPath);
}3.删除目录：
代码语言：javascript复制 /// <summary>
/// 删除目录
/// </summary>
/// <param name="chroot"></param>
/// <param name="serverPath"></param>
/// <returns></returns>
static public string RemoveChroot(string chroot, string serverPath)
{
if (string.IsNullOrEmpty(chroot)) return serverPath;
return string.Compare(serverPath, chroot, StringComparison.Ordinal) == 0 ? "/" : serverPath.Substring(chroot.Length);
}
