How to Implement Base64 URL-Safe Encoding and Decoding in C#?

Base64 URL security coding in the c#

Question:

How to implement the Base64 URL security encoding in C#, where the '' 'and'/'characters are replaced by'-'and' _ ', and omit the filling' = '?

Answer:

In Java, the commonly used CODEC library can easily provide URL security coding. However, in C#, we need to realize our own solutions. Code:

To encode the byte array to the URL security Base64 string in C#, please use the following code:

Create a constant array for filling characters:

Decoding:

string returnValue = System.Convert.ToBase64String(toEncodeAsBytes)
        .TrimEnd(padding).Replace('+', '-').Replace('/', '_');

Decoding the URL security Base64 string decoding the Back byte array, please use the following code:

static readonly char[] padding = { '=' };

Additional description:

In order to ensure that the URL security encoding provided by the Java Codec library is worth testing whether the above methods have produced the same results. URL security coding is a standard approach that can avoid%-encoding in the URL while maintaining the integrity of data.

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