Online Base64 Encoder

I've heard people talking about "base 64 encoding" here and there. What is it used for?

I want to achieve Base64 URL safe encoding in C#. In Java, we have the common Codec library which gives me an URL safe encoded string. How can I achieve the same using C#?

byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes("StringToEncode");string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);

The above code converts it to Base64, but it pads ==. Is there is way to achieve URL safe encoding?

I am developing an application in C to send video log of running session. For that I am using client server architecture.

Client

• Captures the screen every second in a series of frames .
• Encodes the frame i.e. byte array by using base64
• And sent to targeted server in thread function by calling web services API (in C#).

Server

• Server receives the byte array decodes them to form an image (in C#).

PROBLEM :-

• When I connect from one machine with 2 or more live sessions, the CPU utilization goes to 100% and everything seems to freeze.
• I am not able take & capture more than 1 live session as base64 encoding is too heavy and time consuming to process.

Looking for some optimization technique for BMP files in base64 at client side before sending over to server.

Thank you in advance.

EDIT :

Code uses openssl functions for encoding at client side and it is mandatory as normal string with some special characters are discarded and blocked by gSOAP which provides connectivity with C# services at server side.

char *base64(const unsigned char *input, int length){    BIO *bmem, *b64;    BUF_MEM *bptr;    b64 = BIO_new(BIO_f_base64());    bmem = BIO_new(BIO_s_mem());    b64 = BIO_push(b64, bmem);    BIO_write(b64, input, length);    BIO_flush(b64);    BIO_get_mem_ptr(b64, &bptr);    char *buff = (char *)malloc(bptr->length);    memcpy(buff, bptr->data, bptr->length - 1);    buff[bptr->length - 1] = 0;    BIO_free_all(b64);    return buff;}

Looking for a test case in which either the Base64 encode decode may break with an UnsupportedEncodingException or the decoded String will not be same as original. Intention is to create a set of test cases.

import java.io.UnsupportedEncodingException;import java.util.Base64;public class Encode {    public static void main(String[] args)  {        System.out.println(" Hellow Encode" );        String[] test = {"+","+1"," !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"                ,"+name `~ name =="};        try {            for(String mes : test) {                System.out.print(mes);                String s=Base64.getEncoder().encodeToString(mes.getBytes("utf-8"));                System.out.print("\t"+s);                byte[] decoButes=Base64.getDecoder().decode(s);                String decoStr =  new String(decoButes, "utf-8");                System.out.println(decoStr.equals(mes)); // If Falls Sucess            }        }catch(UnsupportedEncodingException e){            System.out.println("SUCESS"); // Wish if this is executed        }    }}

I have base64 encoded data that was created with Perl, using MIME::Base64 with encode_base64($data).

The result is: ahX/OxLY/BBR4Wy+n+a3Mg==

When I decode this in Perl, I get j?;??Q?l???2. If I write that out to a file, it looks like this: jˇ;ÿ¸Q·læüÊ∑2

However, when I try to use the same base64 encoded data and decode with python base64.b64decode(data), I get:b'j\x15\xff;\x12\xd8\xfc\x10Q\xe1l\xbe\x9f\xe6\xb72'`

If I decoded it to latin1, the result is a bit closer: 'j\x15ÿ;\x12Øü\x10Qál¾\x9fæ·2', but I need the exact same data.

How can I get the exact same output from python? What am I missing?

(The Perl $data itself was supposedly generated with urandom read(DEV,$data,16);.