Canonicalized Header and Resource String

gistfile1.cs

private static string[] GetCanonicalizedHeaders(HttpRequestHeaders headers)
{
    return headers
        .Where(p => p.Key.StartsWith("x-ms-", StringComparison.InvariantCultureIgnoreCase))
        .Select(p => new { Name = p.Key.ToLower(), Value = p.Value.First() })
        .OrderBy(p => p.Name)
        .Select(p => string.Format("{0}:{1}", p.Name, p.Value))
        .ToArray();
}

private string[] CanonicalizedResource(Uri requestUri)
{
    var path = requestUri.AbsolutePath;
    var query = requestUri.Query.Length <= 1 ? new string[0]
                : requestUri.Query.Substring(1).Split('&')
                .Select(p =>
                {
                    var s = p.Split('=');
                    return new
                    {
                        Name = Uri.UnescapeDataString(s[0].ToLower()),
                        Value = Uri.UnescapeDataString(s.Length > 1 ? s[1] : "")
                             .Replace('+', ' ')
                    };
                })
                .GroupBy(p => p.Name)
                .OrderBy(g => g.Key)
                .Select(g => string.Format("{0}:{1}",
                                           g.Key,
                                           g.OrderBy(s => s.Value)
                                               .Select(s => s.Value)
                                               .Aggregate((a, s) => JoinWith(',', a, s))));
    return new[] { "/" + _account + path }.Concat(query).ToArray();
}

private static string JoinWith(char sep, string left, string right)
{
    return string.IsNullOrWhiteSpace(left) ? right : left + sep + right;
}