URL Encode
URL(Uniform Resource Locator)
Web browsers request pages from web servers by using a URL. When you click on a link in an HTML page, an underlying <a> tag points to an address on the web. A Uniform Resource Locator (URL) is used to address a document (or other data) on the web.
Syntax rules
scheme://prefix.domain:port/path/filename
- scheme - defines the type of Internet service (most common is http)(协议)
- prefix - defines a domain prefix (default for http is www)(前缀)
- domain - defines the Internet domain name (w3schools.com)(域名)
- port - defines the port number at the host (default for http is 80)(端口)
- path - defines a path at the server (If omitted: the root directory of the site)
- filename - defines the name of a document or resource
Common URL Schemes
| Scheme | Short for | Used for |
|---|---|---|
| http | HyperText Transfer Protocol | Common web pages. Not encrypted |
| https | Secure HyperText Transfer Protocol | Secure web pages. Encrypted |
| ftp | File Transfer Protocol | Downloading or uploading files |
| file | A file on your computer |
URL Encoding
URLs can only be sent over the Internet using the ASCII character-set. If a URL contains characters outside the ASCII set, the URL has to be converted.
URL encoding converts non-ASCII characters into a format that can be transmitted over the Internet. URL encoding replaces non-ASCII characters with a "%" followed by hexadecimal digits. (飞ASCII字符需要转化以十六进制数前加%标记)
URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign, or %20.(没有空格用+或%20代替)
Hello Günter被解析成text=Hello+G%C3%BCnter
For a complete reference of all URL encodings, visit our URL Encoding Reference.