folkert klemme, data access corporation. agenda. 1. business aspects 2. overview internet...

Folkert Klemme, Data Access Corporation

Agenda. 1. Business Aspects 2. Overview Internet Technology 3. MS Internet Information Server with ASP 4. The DataFlex WebApp Server 5. Development of WebApps

Business Aspects. Internet Applications A Technology Shift ? Like DOS to Windows Delay with Y2000 / Euro

Internet is the strategic Goal !

Imagine the Possibilities.Commercial Applications

Business Information Applications

Dynamic Content Publishing

E-Commerce. Any type of commercial applications

or just Online Shopping

Less Business-to-Consumer More Business-to-Business

Business Information Systems.

Information Distribution Communities Portal Application Internet Relationship Management One-to-One Marketing

Your Ideas in the Internet

Dynamic Content Publishing.

Authoring Server More than 90% of the Web Sites contain

pure HTML Web Functionality

Forum FAQ Dealer List Download Area

Base Technology. TCP/IP HTTP, FTP, SMTP, POP3 HTTP-Server Clients:

Netscape Navigator Internet Explorer

Transfering HTML Pages Header Body

HTTP Communication.

Communication II.

Dynamic WebApps. CGI, ISAPI Java Applets JavaScript, JScript, VBScript Client- or Server-side Scripts Active Server Pages (ASP)

WebApp Architecture I. Approach CGI / ISAPI

Develope WebApp from the scratch Languages: C, Pearl ? DBMS Access via ? Standards ? Extremly high Resources Two-Tier Architecture ? Session starts a process Dont reinvent the wheel

WebApp Architecture II. Approach Java

Two or Three-Tier Architecture DBMS, Java/Server, Java/Client Standards ? Extremly high Resources

Server: NetDynamics, Silverstream

WebApp Architecture III. Approach Server-side Scripting

proprietary Script- or Markup Language Limited to Two-Tier Architecture very often ODBC Interface (Unix ?)

Server: Tango, Cold Fusion

WebApp Architecture IV. DataFlex WebApp Server

Server-side Scripting via ASP Web Business Process Objects Three-Tier Architecture Direct Database Driver Unlimited Database Supporting all Standards

WebApp Architecture I.

DataFlex WBPO. Subclass of Business Process Contains DD-Structure Functions, Procedures Methods

RequestSave, RequestDelete, RequestFind, RequestClear, DoProcess, DFFunc

Property DDValue

WebApp in Details.

The DataFlex WebApp Server. Advantages

Standard Internet Technology for Internet Functionality ...

... extended by DataFlex for Database & Business Functionality

No “Not possible” Transparent and portable access to the

Database Unlimited Database included Offline Applications with the same Tool

DataFlex WebApp Server. Windows NT 4 MS Internet Information Server 4 Visual DataFlex 5.1 or higher DataFlex Web App Server

Development License

Internet Information Server. FTP Server HTTP Server

CGI Interface ISAPI Interface

Active Server Pages

Active Server Pages. The meaning of <% and %> Script Languages Objects, Methods, Functions Objekte Response & Request HTML Forms

Tuesday 10:50 am

Web Application. 1. Develope a WBPO as VDF WebView (WVW) 2. Compile VDF Web Project 3. Start VDF Web Project 4. Create a virtual Directory (AppHTML) 5. Define WBPO as COMWBPO in GLOBAL.ASA 6. ASP can access COMWBPO

DataFlex WebApp Server.

No special demand to the Client Real Thin-Client Technology Supports classic and Internet Applications Supports all major Databases (native Driver) Works as Add-On for every DB-Application

Samples