what base64 encoding

The computer can only process numbers, so to process any text, you can only convert the text into numbers first. Bit (BIT) (B) bit or bitIs the basis for computer operation and belongs to the binary category. Data transmission is mostly in the unit

In our work sometimes we need to convert a picture or PDF file to a Base64 encoding, and then download it from the server side to the local, where I enumerate the conversion methods between the two:Convert BASE64 encoding to PDF:/** * Description:

Base64 is one of the most common encoding methods used to transmit 8-bit code on the network. For details, refer to RFC2045 ~ RFC2049, which has the MIME detailed specification. Base64 encoding can be used to transmit long identification information

Transferred from: http://www.cnblogs.com/yejianfei/archive/2013/04/06/3002838.htmlBase64 is a representation of binary data based on 64 printable characters. Because of 26=64, every 6 bits is one unit, corresponding to a printable character. Three

Base64 encoding includes 64 characters: 10 digits (0-9), 26*2 Letters (a-za-z), +,\There is also a 65th character = as a suffix, which has no practical effect.A piece of code to illustrate the question:1PHP2 3 $str= ' 1234567 ';4 5 $en=Base64_encode(

Analyze problems Unlike traditional encoding, base64 encoding is designed to confuse eight-byte data streams. In network transmission and email systems, base64 encoding is widely used. Base64 is not a confidential mechanism, but it does program

The timcodecb64 class is a base64 encoding and decoding class provided by the Symbian platform. You may not find the description about the base64 encoding and decoding class in the SDK of the official documentation. However, this class does exist in

Base64 encoding and decoding for node. js learning, and node. jsbase64 Encoding I. Base64 encoding Origin Why is Base64 encoded? Because some network transmission channels do not support all bytes, for example, traditional mail only supports

Introduction to base64 encoding and its use in Java Base64 is a frequently used encoding method. It was first generated to send email attachments. Today we have fixed a base64 decoding error. Let's take a look at it. Principle Base64 encoding

Control character in cookie value, consider BASE64 encoding your value, java operation cookie will report an error in Chinese, the report will report The project uses cookies to save Chinese characters, but the following error is reported: Control

In this paper, we describe the method of Base64 encoding for utf-8 of Chinese strings by JS. Share to everyone for your reference, specific as follows: String to encode: "Select username from user" Using Java for encoding, Java programs:

I. Coding rules for BASE64 The idea of BASE64 encoding is to encode the data using 64 basic ASCII characters. It splits the data that needs to be encoded into a byte array. A group of 3 bytes. Arrange the 24-bit data in order, then divide the 24-bit

Base64 Is based on 64 Printable characters to represent the representation of binary data. Because 26 = 64 , So every 6 It is a unit that corresponds to a printable character. Three bytes in total 24 Bit, corresponding 4 Items Base64 Unit, that is 3

Base64 encoding is commonly used to convert hexadecimal data into visible characters. Compared with the ASCII code, it occupies less space. Base64 encoding is defined in rfc3548. 　　 1. base64 encoding/decoding principle The encoding rules: 1)

Definition of QP and base64 encoding in rfc1521   1. Description of the QP (quoted-printable) encoding method: Rule 1: Except for line breaks, all other 8-bit bytes must be expressed as a "=" sign plus the hexadecimal number of the four digits and

  1.1 base64 Encoding Principle 1.1.1 Summary : Base64 is a common encoding method in communication transmission. (Note the encoding algorithm, not the encryption algorithm) A common problem occurs during parameter transmission: Garbled characters

BASE64 encoding is a commonly used character encoding and is used in many places. The JDK provides easy-to-use Base64encoder and Base64decoder, which makes it easy to complete BASE64-based encoding and decoding.Remember: The following two encodings

Read Catalogue First, Base64 code Second, MD5, SHA1, SHA256, SHA512, HMAC implementation GitHub Code It is said that today 520 is a good day, why I think of 502, 500, 404 these? Fortunately the server is OK!First, Base64

I. Coding rulesThe idea of BASE64 encoding is to encode the data using 64 basic ASCII characters. It splits the data that needs to be encoded into a byte array. A group of 3 bytes. Arrange the 24-bit data in order, then divide the 24-bit data into 4

Using base64 encoding in HTML is called Data URI scheme. The currently supported types of Data URI scheme are: (2016-10-19)Data:, text