How to have the Uppercase Encoding for the string?

I need to Percent Encoding for my Url and Pararmeters. I am using UrlEncode, it works fine but it returns lower case but not the upper case. How can I have Uppercase for the encoded characters?

var pEncodeUrl = HttpUtility.UrlEncode(url);

it gives like 'https%3a%2f%2fapi.test.com' But i Need like 'https%3A%2F%2Fapi.test.com'

If I would var pEncodeUrl = HttpUtility.UrlEncode(url).ToUpper(), It gives thw whole URL as Upper case which I dont need.

How can I get it fixed?

Thanks,

Re: How to have the Uppercase Encoding for the string?

Why do you need it upper case?

Re: How to have the Uppercase Encoding for the string?

The percent-encoded representations must be capitalized in the base string which is passed into the HMAC-SHA1 function. In other words, : must be encoded as "%3A" instead of "%3a".

Re: How to have the Uppercase Encoding for the string?

You might have to resort to calling UrlEncode() and then ToUpper() on just the part you want/need uppercase, and just UrlEncode() on the rest and then concatenate the two together.

Re: How to have the Uppercase Encoding for the string?

I don't understand what you mean. I am using it right now and do not have this issue. I don't know what you mean by MUST. It's just an encryption technique. Doesn't matter what you pass it. As long as the client and server do the same thing, it works.

string userkey = _users[token.PublicKey];
            byte[] secretBytes = ASCIIEncoding.ASCII.GetBytes(userkey);
            HMACSHA256 hmac = new HMACSHA256(secretBytes);
            byte[] dataBytes = ASCIIEncoding.ASCII.GetBytes(uri + token.Timestamp);
            byte[] computedHash = hmac.ComputeHash(dataBytes);
            string computedHashString = Convert.ToBase64String(computedHash);
            return computedHashString.Equals(token.Signature);

Re: How to have the Uppercase Encoding for the string?

digitalpacman

... I don't know what you mean by MUST. It's just an encryption technique. Doesn't matter what you pass it. As long as the client and server do the same thing, it works.

Right, I suspect this is the issue. Perhaps he's sending this off to some other app and it's expecting the casing the way he described.

Re: How to have the Uppercase Encoding for the string?

Loop over it with a regex and do replacements. Only thing I got. I don't know of any "upper case only url encoding" built into .net. You, and the person you're dealing with, should probably be SHA'ing the pre-encoded value to avoid these problems.

%[a-zA-Z0-9]{2}

Match that and loop over doing replacements to the upper case version.

Re: How to have the Uppercase Encoding for the string?

split("%")

for (i = 1; i < length; i += 2)
items[i] = items[i].ToUpper()

.join("%")

Re: How to have the Uppercase Encoding for the string?

Thanks, I got it through like below

private static string UrlEncodeUpperCase(string stringToEncode)
        {
            var reg = new Regex(@"%[a-f0-9]{2}");
            stringToEncode = HttpUtility.UrlEncode(stringToEncode);
            return reg.Replace(stringToEncode, m => m.Value.ToUpperInvariant());
        }

Re: How to have the Uppercase Encoding for the string?

The split ,method is probably like 10x faster. but coo.

Re: How to have the Uppercase Encoding for the string?

The simplest way to do this is to use the best method available in .NET for encoding URIs: Uri.EscapeDataString.

> System.Uri.EscapeDataString("https://api.test.com");;
val it : string = "https%3A%2F%2Fapi.test.com"

Re: How to have the Uppercase Encoding for the string?

Did my answer help? I'm curious if it doesn't work, as it appeared to do exactly what you needed.