What Are the Different Types of Web Gadgets?

The original meaning of the Web is spider webs and webs, which are called web pages in web design. It is now widely translated into the technical fields of network and Internet, which are manifested in three forms, namely hypertext, hypermedia, and hypertext transfer protocol (HTTP). WEB technology refers to a general term for technologies for developing Internet applications, and generally includes WEB server technology and WEB client technology.

The Web is a typical distributed application structure. Every information exchange in a web application involves a client and a server. therefore,

Web development technologies can also be broadly divided into client technology and server technology. Here is a brief introduction to these technologies, so that the reader has a general understanding of Web technologies. ^[1]

Web

Similar to the evolution process of Web client technology from static to dynamic, the development technology of Web server is also gradually developed and improved from static to dynamic. Web server technologies include server, CGI, PHP, ASP, ASP.NET, Servlet, and JSP technologies.

1) Server technology. It mainly refers to the basic technology of Web server construction, including server strategy and structural design, server software and hardware selection, and other issues related to server construction.

2) CGI (Common Gateway Interface) technology, that is, the common gateway interface technology. The earliest web servers simply responded to HTTP requests from browsers and returned HTML files stored on the server to the browser. CGI is the first technology that enables a server to dynamically generate HTML pages based on specific conditions at runtime. In 1993, the NCSA (National Center Buddha Day Supercomputing Applications) proposed a draft standard for CGI 1.0, and in 1995 and 1997, respectively, formulated CGI 1.1 and 1.2 standards. CGI technology allows server-side applications to dynamically generate HTML pages based on client requests, which makes it possible for the client and server to exchange dynamic information. With the popularization of CGI technology, various web applications such as chat rooms, forums, e-commerce, information query, and full-text search are booming. People can enjoy more convenient information such as information retrieval, information exchange, and information processing Serve it.

3) PHP (Personal Home Page Tools) technology. In 1994, Rasmus Lerdorf invented the PHP language dedicated to Web server programming. Unlike previous CGI programs, PHP language combines HTML code and PHP instructions into a complete server-side dynamic page. Developers of Web applications can implement dynamic Web functions in a simpler and faster way.

4) ASP (Active Server Pages) technology, that is, Active Server Pages technology. In 1996, Microsoft borrowed the ideas of Php and introduced ASP technology in its Web server IIS 3.0. The scripting languages used by ASP are familiar VBScript and Javascript. With the success of development tools such as Microsoft Visual Studio in the market, ASP has quickly become the mainstream development technology of Web server under Windows.

5) ASP.NET technology. Because it uses the C # language instead of the JavaScripe scripting language of ASP technology, and compiles instead of step-by-step explanation, which improves the operating efficiency, ASP.NET is a programming framework built on the common language runtime of the .NET Framework and can be used to generate on the server Powerful web application, instead of adding ASP script code to the web page, separates the interface design and program design with different files, improves the reusability and maintainability, and has become the web for the next generation of enterprise-level network computing. The platform is a major upgrade and update of traditional ASP technology.

6) Servlet, JSP technology. The Java camp, led by Sun, introduced Servlet and JSP technologies in 1997 and 1998, respectively. The combination of JSPs allows Java developers to have both centralized processing functions similar to CGI programs and HTML-embedded functions similar to PHP. In addition, Java's runtime compilation technology also greatly improves the execution efficiency of Servlet and JSP. Servlet and JSP were absorbed as the core technology by the later JavaEE platform ^[3] .