web application

web application

1. client/ server

   • provide / store information
     • respond to request for data or files such a s web pages
   • Request information
     • also called as web browser
   • Client-Server Model
     • Database ——》Server side——》Web Server——》Web Client——》HTTP PROTOCOL

2. WEB application

   • message board , guest sign in book on a website, spreadsheetRuns WEB Browser
     • GMAIL (login, create and organize filters, read messages, reply, forward, send, and delete, and logout）
       • TO CLIENT / SERVER
         • The client side of a web application=front end. The server side=back end.
   • relieve developer responsibilities from running the Web browser
     • Mac, PC, Windows or Linux, Firefox or Google Chrome
       • *NO NEED package up software *Updating the software is easier. For mobile web application, developers easier to go through the approval

3. web services

   • Establishing a communication between two software / calling function inside a software
     • *Internet *Format of input and output messages (SOAP and REST)
       • SOAP – Simple Object Access Protocol
         • ACCESS the functions in the server 1) Location of the web service’s server (address) - what kind of functions are they offering - signature of each function - standard & protocols used by the web service ///ALL CAPTURE IN WSDL FILE
           • WSDL (Web Services Description Language) -web services. Is written in XML (eXtensible Markup Language) The client need the WSDL file so that they can use the web services.
             • How to retrieve the WSDL file?
       • REST – REpresentational State Transfer protocol
         • Seeks to fix the problems with SOAP
           • Sends a request to access the resource residing in server using its URI
             • Response HTML, XML, plain text, PDF, JPEG, etc

Images and files in the map