What is content Transfer-Encoding Base64?
Base64 encoding is the scheme used to transmit binary data. Base64 processes data as 24-bit groups, mapping this data to four encoded characters. It is sometimes referred to as 3-to-4 encoding.
What is content Transfer-Encoding?
Content transfer encoding defines encoding methods for transforming binary email message data into the US-ASCII plain text format. This transformation allows the message to travel through older SMTP messaging servers that only support messages in US-ASCII text. Content transfer encoding is defined in RFC 2045.
What is content Transfer-Encoding header?
A Content-Transfer-Encoding header field, which can be used to specify an auxiliary encoding that was applied to the data in order to allow it to pass through mail transport mechanisms which may have data or character set limitations.
Is content Transfer-Encoding required?
The Content-Transfer-Encoding field is used to indicate the type of transformation that has been used in order to represent the body in an acceptable manner for transport. Unlike Content-Types, a proliferation of Content-Transfer- Encoding values is undesirable and unnecessary.
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 is Base64 encoding decoding?
Base64 is an encoding and decoding technique used to convert binary data to an American Standard for Information Interchange (ASCII) text format, and vice versa.
Does SMTP use Base64?
Base64 is also widely used for sending e-mail attachments. This is required because SMTP—in its original form—was designed to transport 7-bit ASCII characters only. This encoding causes an overhead of 33–36% (33% by the encoding itself; up to 3% more by the inserted line breaks).
What is the difference between base64 and UTF-8?
UTF-8 is like the other UTF encodings a character encoding to encode characters of the Unicode character set UCS. Base64 is an encoding to represent any byte sequence by a sequence of printable characters (i.e. A – Z , a – z , 0 – 9 , + , and / ). There is no System. Text.
What is Base64 encoding example?
Base64 Encoding Example A Base64 encoder starts by chunking the binary stream into groupings of six characters: 100110 111010 001011 101001. Each of these groupings translates into the numbers 38, 58, 11, and 41.
What is Base64 encoding?
Base64 encoding is the scheme used to transmit binary data. Base64 processes data as 24-bit groups, mapping this data to four encoded characters. It is sometimes referred to as 3-to-4 encoding. Each 6 bits of the 24-bit group is used as an index into a mapping table (the base64 alphabet) to obtain a character for the encoded data.
Is it possible to transport base64-encoded data using HTTP?
Of course you’re allowed to transport Base64-encoded data using HTTP, but that should be something both parties (client and server) agree on, and there doesn’t seem to be a header to describe this behavior. Thanks for contributing an answer to Stack Overflow!
Should I use Base64 or QP encoding for HTML?
Use Base64 encoding for HTML and for plain text, unless line wrapping is enabled in plain text. If line wrapping is enabled in plain text, use Base64 encoding for HTML, and use 7-bit encoding for plain text. Always use QP encoding for HTML.
What is content transfer encoding (CTE)?
Content transfer encoding is defined in RFC 2045. The transfer encoding method is stored in the Content-Transfer-Encoding header field in the message. In Microsoft Exchange Server 2013, the following content transfer encoding methods are available: