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2. base64 - What is base 64 encoding used for? - Stack Overflow

   stackoverflow.com/questions/201479

   The base64 is a binary to a text encoding scheme that represents binary data in an ASCII string format. base64 is designed to carry data stored in binary format across the channels. It takes any form of data and transforms it into a long string of plain text.

3. How to check whether a string is Base64 encoded or not

   stackoverflow.com/questions/8571501

   349. You can use the following regular expression to check if a string constitutes a valid base64 encoding: In base64 encoding, the character set is [A-Z, a-z, 0-9, and + /]. If the rest length is less than 4, the string is padded with '=' characters.

4. How to encode text to base64 in python - Stack Overflow

   stackoverflow.com/questions/23164058

   Remember to import base64 and that the b64encode function takes bytes as an argument. import base64 b = base64.b64encode(bytes('your_string', 'utf-8')) # bytes base64_str = b.decode('utf-8') # convert bytes to string Explanation: The bytes function creates a bytes object from the string "your_string" using UTF-8 encoding.

5. macos - base64 doesnt have -w option in Mac - Stack Overflow

   stackoverflow.com/questions/46463027

   Wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping. And here's the macOS man page for base64: -b count. --break=count. Insert line breaks every count characters. Default is 0, which generates an unbroken stream. So, the flag is called -b in macOS, and it already defaults to 0, which means base64 in macOS has ...

6. javascript - Convert blob to base64 - Stack Overflow

   stackoverflow.com/questions/18650168

   Note: The blob's result cannot be directly decoded as Base64 without first removing the Data-URL declaration preceding the Base64-encoded data. To retrieve only the Base64 encoded string, first remove data:/;base64, from the result.

7. php - Passing base64 encoded strings in URL - Stack Overflow

   stackoverflow.com/questions/1374753

   The basic charset of base64 may in some cases collide with traditional conventions used in URLs. But many of base64 implementations allow you to change the charset to match URLs better or even come with one (like Python's urlsafe_b64encode()). Another issue you may be facing is the limit of URL length or rather — lack of such limit.

8. How do you decode Base64 data in Python? - Stack Overflow

   stackoverflow.com/questions/3470546

   I have the following piece of Base64 encoded data, and I want to use the Python Base64 module to extract information from it. It seems that module does not work. How can I make it work?

9. string - Base64 length calculation? - Stack Overflow

   stackoverflow.com/questions/13378815

   The answer is (floor(n / 3) + 1) * 4 + 1. This includes padding and a terminating null character. You may not need the floor call if you are doing integer arithmetic. Including padding, a base64 string requires four bytes for every three-byte chunk of the original string, including any partial chunks.

10. Remove trailing "=" when base64 encoding - Stack Overflow

    stackoverflow.com/questions/4492426

    The = is padding. <!----->. Wikipedia says. An additional pad character is allocated which may be used to force the encoded output into an integer multiple of 4 characters (or equivalently when the unencoded binary text is not a multiple of 3 bytes) ; these padding characters must then be discarded when decoding but still allow the calculation of the effective length of the unencoded text ...

11. Why does base64 encoding require padding if the input length is...

    stackoverflow.com/questions/4080988

    All base64 characters can be represented in 6 bits, 2 bits short of a full byte. We can represent base64 encoding versus the byte paradigm as a fraction: 6 bits per character over 8 bits per byte. Reduced this fraction is 3 bytes over 4 characters. This ratio, 3 bytes for every 4 base64 characters, is the rule we want to follow when encoding ...