Base64 decode in C# or Java

Question

I have a Base64-encoded object with the following header:

application/x-xfdl;content-encoding="asc-gzip"

What is the best way to proceed in decoding the object? Do I need to strip the first line? Also, if I turn it into a byte array (byte[]), how do I un-gzip it?

Thanks!

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I think I misspoke initially. By saying the header was

application/x-xfdl;content-encoding="asc-gzip"

I meant this was the first line of the file. So, in order to use the Java or C# libraries to decode the file, does this line need to be stripped?

If so, what would be the simplest way to strip the first line?

Answer 1

To decode the Base64 content in C# you can use the Convert Class static methods.

byte[] bytes = Convert.FromBase64String(base64Data);

You can also use the GZipStream Class to help deal with the GZipped stream.

Another option is SharpZipLib. This will allow you to extract the original data from the compressed data.