37 lines
1.2 KiB
C#
37 lines
1.2 KiB
C#
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using System;
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using System.Linq;
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using System.Collections.Generic;
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using System.Linq.Expressions;
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using System.Text;
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namespace LeanCloud.Realtime.Internal
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{
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internal static class StringEngine
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{
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internal static string Random(this string str, int length)
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{
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const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
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var random = new Random();
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return new string(Enumerable.Repeat(chars, length)
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.Select(s => s[random.Next(s.Length)]).ToArray());
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}
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internal static string TempConvId<T>(this IEnumerable<T> objs)
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{
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var orderedBase64Strs = objs.Select(obj => Encoding.UTF8.ToBase64(obj.ToString())).OrderBy(a => a, StringComparer.Ordinal).ToArray();
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return "_tmp:" + string.Join("$", orderedBase64Strs);
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}
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internal static string ToBase64(this System.Text.Encoding encoding, string text)
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{
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if (text == null)
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{
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return null;
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}
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byte[] textAsBytes = encoding.GetBytes(text);
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return Convert.ToBase64String(textAsBytes);
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}
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}
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}
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