哈尔滨工业大学：《网络应用开发》英文版 NAD-chapter6

Use of client-Server paradigm Response from server begins with aSCII header Status code (200 handled request) Http/1.0 200 ok DaEe:Mon,30e200001:22:22 Server: Apache/1.2.5 Last-Modified: Sat 28 oct 2000 01:03:37 GMT EIag:"130:e-81-3883bbe9 Cantent-tanath: 125 Accept-Rangos: bytes Connect lon: close Content-Type: text/plain 哈工大计算机学院李全龙 Network Application Development Server Software Desi

哈工大计算机学院 李全龙 Network Application Development Server Software Design 6 Use of Client-Server Paradigm „ Response from server begins with ASCII header „ Status code (200 = handled request)

Web Components Browser Web server Hypermedia links a Document representation Transfer protocol 哈工大计算机学院李全龙 Network Application Development Server Software Desi

哈工大计算机学院 李全龙 Network Application Development Server Software Design 7 Web Components „ Browser „ Web server „ Hypermedia links „ Document representation „ Transfer protocol

Browser application program User' s interface to web Becomes Web client to fetch information from Web server Displays information for user 哈工大计算机学院李全龙 Network Application Development Server Software Desi

哈工大计算机学院 李全龙 Network Application Development Server Software Design 8 Browser „ Application program „ User’s interface to Web „ Becomes Web client to fetch information from Web server „ Displays information for user

Inside a browser Main controller Receives input from user Invokes client and interpreter Clients One or more built into browser Uses network to fetch items iNterpreter One or more built in Displays items 哈工大计算机学院李全龙 Network Application Development Server Software Desi 9

哈工大计算机学院 李全龙 Network Application Development Server Software Design 9 Inside a Browser „Main controller „ Receives input from user „ Invokes client and interpreter „ Clients „One or more built into browser „ Uses network to fetch items „ Interpreter „One or more built in „ Displays items

Illustration of a Browser Input fronn LHTML mouse and controller interpreter keyboard outpur sent to optional displa interpreter optional client client network interface communication with remote server a Browser contains many components 哈工大计算机学院李全龙 Network Application Development Server Software Design 10

哈工大计算机学院 李全龙 Network Application Development Server Software Design 10 Illustration of a Browser „ Browser contains many components