using System;
using System.Text;
using System.Text.RegularExpressions;
namespace Rocky.Net
{
/// <summary>
/// 数据报文分析器,通过分析接收到的原始数据,得到完整的数据报文.
/// 通常的报文识别方法包括:固定长度,长度标记,标记符等方法
/// </summary>
internal static class DatagramResolver
{
public const int MaxDatagramSize = 1024 * 8;
public const string EndFlag = "<EOF>";
/// <summary>
/// 解析报文
/// </summary>
/// <returns>报文数组,原始数据可能包含多个报文</returns>
public static string[] Resolve(StringBuilder sb)
{
if (sb.Length == 0)
{
return new string[0];
}
string buffer = sb.ToString();
sb.Length = 0;
string[] resolved = Regex.Split(buffer, EndFlag);
int size = resolved.Length - 1;
if (resolved[size].Length < MaxDatagramSize)
{
sb.Append(resolved[size]);
}
Array.Resize<string>(ref resolved, size);
return resolved;
}
}
}