Active Server Page（ASP）
ASP is the abbreviation of Active Server Page, meaning 'Active Server pages'. ASP is Microsoft company developed the CGI scripts to replace a applications, it can and database and other procedures interaction, is a simple and convenient programming tools. ASP page file format is. ASP, now often used in all kinds of dynamic web site. Another aspirin, aspartic acid ali software sales partners, the United States armed system and procedures of the company and all abbreviations for ASP.
The history of ASP
From 1996 to now past ASP was born for 15 years. In the short of 15 years, ASP there are major changes, until now the ASP.
The first edition of asp is 0.9 beta, since 1996 ASP1.0 was born, it to Web development industry brought good news. The Web application development early is very tedious, so that to make a simple dynamic pages need to write a lot of C code to complete this for ordinary programmer is a bit too hard. But allows the use of ASP and VBScript this simple scripting language, writing, embedded in the HTML web page code. In the program design of the time can use its internal components to achieve some advanced functions such as Cookie). It#39;s the biggest contribution is its ADO (ActiveX Data Object), the component of the operation of the database makes the program is very simple, so the dynamic web design also become a picnic. So overnight, Web design program is no longer difficult task of imagination, as if a lot of people can be tried his power.
In 1998, Microsoft released ASP 2.0. It is part of the Windows NT4 Option Pack, as IIS 4.0 wide type accessories. It with ASP 1.0 the main difference between its external components can be initialized, such, in the ASP program of all internal components have the independent memory space, and available for the transaction.
By 2000, with the success of Windows 2000 release, the operating system IIS 5.0 with ASP 3.0 also begins popularity. Compared with ASP 2.0, ASP 3.0 the advantage is that it USES the COM , so its efficiency than it is at the front of the versions, and more stable.
In 2001, ASP appeared. In the first of the development, it is the name of the ASP , but, in order to and Microsoft.net plan match, and to show that the ASP version and not to ASP3.0 complement, Microsoft named it ASP. ASP in structure to the front is the version, it almost completely is based on component and modular, Web applications developers to use the development environment can realize more modular, more powerful application.
ASP Page Features
ASP is a server-side scripting lt; http://baike.baidu.com/view/54.htm gt; writing environment, can be used to create and run dynamic Web lt; http://baike.baidu.com/view/828
.htm gt; or Web applications lt; http://baike.baidu.com/view/330120.htm gt;. ASP page can contain HTML lt; http://baike.baidu.com/view/692.htm gt; mark, plain text, script commands and COM components lt; http://baike.baidu.com/view/185316.htm gt;, etc. Using ASP can add interactive content to the web (such as online forms lt; http://baike.baidu.com/view/678520
.htm gt;), can also create use HTML web as a user interface web application lt; http://baike.
baidu.com/view/138452.htm gt;. Compared with HTML, ASP page has the following features:
(1) using ASP can realize breakthrough static page lt; http://baike.baidu.com/view/348763.
htm gt; of some functions restrictions, realize the dynamic web technology;
(2) the ASP file is included in the HTML code lt; http://baike.baidu.com/view/41.htm gt; of files, easy to modify and testing;
(3) the ASP server lt; http://baike.baidu.com/view/17674.htm gt; will explain program are executed on the server ASP program, and will result in HTML format transmitted to the client browser, so using various browsers can browse ASP produced a web page,
(4) ASP provided some built-in object, use these objects can make the server script function more strong. For instance can obtain users from the web browser in through an HTML form lt; http://baike.baidu.com/view/3488030.htm gt; information submitted, and in the script for the information processing it, and send information to the web browser;
(5) ASP can use the server lt; http://baike.baidu.com/view/7251.htm gt; ActiveX component to the implementation of the various tasks, such as access database lt; http://baike.baidu.com/
view/1088.htm gt;, send Email or access the file system, etc.
(6) as the server will ASP program execution is the result in HTML back to the client browser lt; http://baike.baidu.com/view/7718.htm gt;, therefore users won#39;t see ASP written original program code, can prevent the ASP code being stolen.
(7) convenient connection ACCESS and SQL database.
(8) development need to have rich experience, otherwise, it will set aside holes, let the hacker (cracker) utilization injection attack.
ASP are not limited to the HTML WEB site with with production, but with the XHTML and WML language combined with production WAP lt; http://baike.baidu.com/view/7319.htm gt; mobile WEB sites. But the principle is the same.
ASP principle of work
When in the Web site in ASP function, will take place the following things:
1, the user input to the browser address bar web site, the default page extension is. Asp.
2, the browser to server is requested.
3, server engine lt; http://baike.baidu.com/view/53607.htm gt; running ASP program.
4, ASP file from top to bottom in accordance with the order of the handling began, execute the command, executive HTML pag
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