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This article mainly introduces what the url format refers to, the article is very detailed, has a certain reference value, interested friends must read it!

The English full name of url format is Uniform Resource Locator, which refers to the network address; on WWW, each information resource has a unified and unique address on the Internet, which is called URL, which is the unified resource location symbol of WWW.

The English full name of url format is Uniform Resource Locator.

On WWW, each information resource has a unified and unique address on the Internet, which is called URL (Uniform Resource Locator), which is the unified resource location symbol of WWW, which refers to the network address.

URL consists of three parts: the resource type, the host domain name in which the resource is stored, and the resource file name.

It can also be considered to be composed of four parts: protocol, host, port and path.

The general syntax format of URL is:

(optional with square brackets []):

Protocol: / / hostname [: port] / path / [; parameters] [? query] # fragment

Format description

Protocol (protocol)

Specify the transport protocol to use, and the following table lists the valid scheme names for the protocol property. The most commonly used is the HTTP protocol, which is also the most widely used protocol in WWW.

File resources are files on the local computer. Format file:///, note that there should be three slashes after it.

Ftp accesses resources through FTP. Format FTP://

Gopher accesses the resource through the Gopher protocol.

Http accesses the resource through HTTP. Format HTTP://

Https accesses the resource through a secure HTTPS. Format HTTPS://

The mailto resource is an email address and is accessed through SMTP. Format mailto:

MMS plays the resource by supporting the MMS (streaming media) protocol. (for software: Windows Media Player) format MMS://

Ed2k accesses the resource through P2P software that supports the ed2k (dedicated download Link) protocol. (represents software: electric donkey) format ed2k://

Flashget accesses the resource through P2P software that supports the Flashget: (dedicated download link) protocol. (for software: express) format Flashget://

Thunder accesses the resource through P2P software that supports the thunder (dedicated download Link) protocol. (for software: Thunderbolt) format thunder://

News accesses the resource through NNTP.

Hostname (hostname)

Refers to the domain name system (DNS) host name or IP address of the server where the resource is stored. Sometimes, the username and password required to connect to the server can be preceded by the hostname (format: username:password@hostname).

Port (port number)

Integer, optional, use the default port of the scheme when omitted. Various transport protocols have default port numbers, such as the default port of 80 for http. If omitted when entering, the default port number is used. Sometimes for security or other reasons, the port can be redefined on the server to use a non-standard port number, and the port number cannot be omitted from the URL.

Path (path)

A string separated by zero or more "/" symbols, usually used to represent a directory or file address on a host.

Parameters (parameter)

This is optional for specifying special parameters.

Query (query)

Optionally, it is used to pass parameters to dynamic web pages (such as pages made using CGI, ISAPI, PHP/JSP/ASP/ASP.NET, etc.). There can be multiple parameters, separated by "&" symbols, and the name and value of each parameter are separated by "=" symbols.

Fragment (piece of information)

A string that specifies a fragment in a network resource. For example, if there are multiple nouns in a web page, you can use fragment to locate a noun interpretation directly.

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