/// <summary>
/// Percent-encodes the string <paramref name="value"/> except for those characters for which <paramref name="isSafe"/> returns <c>true</c>.
/// </summary>
/// <param name="value">The value to encode.</param>
/// <param name="isSafe">A function determining whether a character is safe (i.e., does not need encoding).</param>
public static string PercentEncode(string value, Func <byte, bool> isSafe)
{
var bytes = Utf8EncodingWithoutBom.GetBytes(value);
var sb = new StringBuilder(bytes.Length);
foreach (var ch in bytes)
{
if (isSafe(ch))
{
sb.Append((char)ch);
}
else
{
sb.Append(PercentEncode(ch));
}
}
return(sb.ToString());
}
/// <summary>
/// Percent-encodes the string <paramref name="value"/> except for those characters for which <paramref name="isSafe"/> returns <c>true</c>.
/// </summary>
/// <param name="value">The value to encode.</param>
/// <param name="isSafe">A function determining whether a character is safe (i.e., does not need encoding).</param>
public static string PercentEncode(string value, Func <byte, bool> isSafe)
{
_ = value ?? throw new ArgumentNullException(nameof(value));
_ = isSafe ?? throw new ArgumentNullException(nameof(isSafe));
var bytes = Utf8EncodingWithoutBom.GetBytes(value);
var sb = new StringBuilder(bytes.Length);
foreach (var ch in bytes)
{
if (isSafe(ch))
{
sb.Append((char)ch);
}
else
{
sb.Append(PercentEncode(ch));
}
}
return(sb.ToString());
}