How do I encode base 64?

How Does Base64 Encoding Work?

1. Take the ASCII value of each character in the string.
2. Calculate the 8-bit binary equivalent of the ASCII values.
3. Convert the 8-bit chunks into chunks of 6 bits by simply re-grouping the digits.
4. Convert the 6-bit binary groups to their respective decimal values.

Is Transfer-Encoding mandatory?

it SHOULD be sent whenever the message’s length can be determined prior to being transferred, unless this is prohibited by the rules in section 4.4. This clearly indicates that it is not required to be sent.

What is the use of Base64 encoding?

Base64 encoding schemes are commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with ASCII. This is to ensure that the data remain intact without modification during transport.

What does 7bit mean in Content-Transfer-Encoding?

With content-transfer-encoding: 7bit the bytes that are used in body (or more correct within part’s boundaries) should represent ascii characters but not extended-ascii characters. This means 0-127 decimal (8th bit not used).

What is the best bitrate to use for transfer encoding?

As long as your content adheres to these rule, 7bit is the best transfer encoding, since there’s no extra work necessary; you just read/write the bytes as they come off the pipe. It’s also easy to eyeball 7bit content and make sense of it.

What is 7bit encoding in SMTP?

Many message transfer agents properly handle only short lines of US-ASCII characters. This is referred to as “7bit” or sometimes as “7bit encoded” text. SMTP imposes this limit. To send a richer set of file types across the Internet so that all Message Transfer Agents (MTAs) can properly process them, some sort of encoding must be used.

What is the difference between Base64 and 7bit encoding?

That is, Base64 and BASE64 and bAsE64 are all equivalent. An encoding type of 7BIT requires that the body is already in a seven-bit mail- ready representation. This is the default value — that is, “Content-Transfer-Encoding: 7BIT” is assumed if the Content-Transfer-Encoding header field is not present.