![what is text encoding what is text encoding](https://www.seobility.net/en/wiki/images/b/b8/Character-encoding.png)
Why does URL encoding exist for ASCII character set.What every developer must know about URL Encoding.
WHAT IS TEXT ENCODING WINDOWS
As of May 2019, Microsoft reversed its course of only supporting UTF-16 for the Windows API, providing the ability to set UTF-8 as the 'code page' for the multi-byte API (previously this was impossible), and now Microsoft recommends (programmers) use UTF-8. The following table uses rules defined in RFC 3986 for URL encoding. UTF-8 is the 'only text encoding mandated to be supported by the C++ standard', as of C++20. All the characters that are safe to be transmitted inside URLs are colored green in the table. But the encoding is still valid as per the RFC. For example, you don’t need to encode the character '0' to %30 as shown in the following table. Note that, Encoding alphanumeric ASCII characters are not required. The following table is a reference of ASCII characters to their corresponding URL Encoded form. Now we just precede the hexadecimal representation with a percent sign ( %), which gives us the URL encoded value - %20. The ASCII value of space character in decimal is 32, which when converted to hex comes out to be 20. Space: One of the most frequent URL Encoded character you’re likely to encounter is space. URL encoding is also called percent encoding since it uses percent sign ( %) as an escape character. The percent sign is used as an escape character.
![what is text encoding what is text encoding](http://www.alanwood.net/unicode/firefox-encoding.png)
Then each byte is represented by two hexadecimal digits preceded by a percent sign ( %) - (e.g.
![what is text encoding what is text encoding](http://herongyang.com/Unicode/word_open_utf-8.jpg)
It first converts the character to one or more bytes. URL Encoding converts reserved, unsafe, and non-ASCII characters in URLs to a format that is universally accepted and understood by all web browsers and servers. So what do we do when we need to transmit any data in the URL that contain these disallowed characters? Well, we encode them! Any data transmitted as part of the URL, whether in query string or path segment, must not contain these characters. Some examples of reserved characters are ?, /, #, : etc. These characters are called reserved characters. Moreover, there are some characters that have special meaning within URLs. backspace, vertical tab, horizontal tab, line feed etc), unsafe characters like space, \,, etc, and any character outside the ASCII charset is not allowed to be placed directly within URLs. These characters include digits (0-9), letters(A-Z, a-z), and a few special characters ( "-", ".", "_", "~").ĪSCII control characters (e.g. URL Encoding (Percent Encoding)Ī URL is composed from a limited set of characters belonging to the US-ASCII character set. This post contains information from the latest RFC document. The current RFC that defines the Generic URI syntax is RFC 3986. 8 Our third example shows how we might encode the structure of a dramatic text: in this case, the end of Beckett’s Waiting for Godot. There have been many improvements done to the initial RFC defining the syntax of Uniform Resource Locators (URLs). 7 We will see below how this encoding could be enhanced to produce an acceptable modern reading version as well as the quasi-diplomatic version shown here.