Detailed Http--uri and URL (ii) __http

the carding of knowledge points: The URL (uniform Resource Locator, Uniform Resource Locator) URL is exactly the Web page address that you need to enter when accessing a Web page using a Web browser.

Uniform Resource Identifier URI (Uniform Resource Identifier)Uniform: Specifies that a unified format facilitates the processing of a variety of different types of resources without identifying the access methods specified by the resource based on the context environment. Adding new protocol scenarios (such as http: or ftp:) is also much easier; Resource: A resource is defined as "anything identifiable." In addition to document files, images, or services that can be distinguished from other types, they are all available as resources. A resource is a single, or a majority, of a collection; Identifier: Represents an identifiable object. Also known as identifiers;conclusion: The URI is the location identifier of the resource represented by a protocol scheme. Protocol scheme is the type name of the protocol used to access the resource;When using the HTTP protocol, the Protocol scheme is HTTP. And such as: Ftp,mailto, etc.The URI identifies an Internet resource with a string, and the URL identifies the location of the resource (where the Internet is located). A URL is a subset of the URI; URI Format Basic Format:To specify a protocol type when accessing a resource by using the http: or HTPs: protocol scheme name. does not differentiate between uppercase and lowercase letters, with a colon (:) appended to the last name. You can also use data: or JavaScript: This class specifies the schema name of the data or script program, and the login information (authentication) specifies the username and password as the necessary login information (identity authentication) for obtaining resources from the server side. Optional; The server address must specify the server address to be accessed using an absolute URI. The address can be a DNS resolvable name, or an Ipv4,ipv6 address name, and a server port number that specifies the network port number on which the server is connected. Optional. If the user omits, the default port number is automatically used; A hierarchical file path specifies the file path on the server to locate the specified resource. This is similar to the file directory structure of the UNIX system; The query string can be passed into any parameter using the query string for resources within the specified file path. This option is optional; the fragment identifier is usually labeled as a child resource in the acquired resource (a location within the document). However, the use of the method is not specified in the RfC. Options available.RFC a document used to develop the technical standards of the HTTP protocol, referred to as an RFC (request for Comments, seek an amendment); the application is implemented in accordance with the standards determined by the RFC; RFC is the Web design document, if not complied with, may cause the situation which cannot communicate;