DEV5: Introduction to WebSpeed

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DEV-5 Introduction to WebSpeed
Stephen Ferguson
Sr. Training Program Manager
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Agenda

• What is WebSpeed?
• A Web Request Round-trip
• WebSpeed Workshop
• Programming Considerations
• Security

This presentation includes annotations with
additional complementary information
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OpenEdge Application Deployment Options
Any client
OpenEdge Application Server
WebSpeed Transaction Server
Application Code
AppServer
Data
Web service Client
OpenEdge Advanced Business Language
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UI Choices Today

• Desktop Application
• versus
• Web Application

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What is WebSpeed?
Components

• WebSpeed is the ultimate thin client
• The client uses a browser to run applications
• WebSpeed components
• Web browser
• Web Server (3rd party product)
• Messenger
• WebSpeed broker
• WebSpeed agent

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WebSpeed Components
Messenger
Web Server
HTTP
Name Server
Database
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WebSpeed Messenger
Components

• Listens for WebSpeed requests coming in to a Web
  server
• Handles data transfer between Web server and
  agent
• Messenger types
• CGI messenger
• Independent process started by the web server
• Dies when its request is complete
• DLL messengers (ISAPI and NSAPI)
• Loaded into the web servers memory and reside
  there
• WSASP
• Works with Microsoft Active Server Pages

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What is WebSpeed?
Additional Components

• WebSpeed Workshop
• WebSpeed development environment
• Name Server
• Directs client connections to a broker
• Load balancing
• Fault tolerance

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What is WebSpeed?
Non-OpenEdge Components

• Web browser
• Resides on client machine
• Handles the display
• Communicates with web servers
• Web server
• Resides on a server machine
• Waits for browser requests
• Serves web pages
• Can run programs and scripts

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Browser Support

WebSpeed 3.1

• Netscape Navigator/Communicator
• Version 4.5 or higher
• Internet Explorer
• Version 4.x or higher
• Considerations / differences
• Browser behavior
• Back / refresh buttons
• Frame handling

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Agenda

• What is WebSpeed?
• A Web Request Round-trip
• WebSpeed Workshop
• Programming Considerations
• Security

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A Web Request Round-trip

• Connection
• Browser and the web server
• Request
• From browser to web server
• Process
• By the requested resources
• Response
• Web server to the browser
• Termination
• Of the connection

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A Web Request Round-trip (1)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (2)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (3)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (4)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (5)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (6)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (7)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (8)
Messenger
Web Server
HTTP
Name Server
Database
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A Web Request Round-trip (9)
Messenger
Web Server
HTTP
Name Server
Database
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Agenda

• What is WebSpeed?
• A Web Request Round-trip
• WebSpeed Workshop
• Programming Considerations
• Security

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WebSpeed Workshop
Messenger
Web Server
HTTP
Name Server
Database
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WebSpeed Workshop - WebTools
Developing WebSpeed Applications
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WebTools
Advantages

• Complete development tools
• OpenEdge Architect or Studio
• Browser based tools
• Wizards
• Sample applications

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Agenda

• What is WebSpeed?
• A Web Request Round-trip
• WebSpeed Workshop
• Programming Considerations
• Security

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Programming Considerations
WebSpeed File Types

• HTML with embedded SpeedScript
• CGI wrappers
• Mapped web objects

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HTML with Embedded SpeedScript

• HTML containing ABL code
• Script language enclosed in tags
• ltscript languageSpeedScriptgt
• Resolved on the server
• SpeedScript never seen on client
• Can use standard HTML editors

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Sample HTML with Embedded SpeedScript
ltscript language"SpeedScript"gt DEFINE VARIABLE
vcCustName AS CHARACTER NO-UNDO. DEFINE VARIABLE
vcToday AS CHARACTER NO-UNDO. FIND FIRST
CUSTOMER NO-LOCK NO-ERROR. ASSIGN vcCustName
Customer.Name vcToday STRING(today). lt/sc
riptgt The first customer
in Sports2000 is ltBgt vcCustName
lt/Bgt.ltBRgt Todays Date is ltBgt vcToday
.lt/Bgtlt/BRgt
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CGI Wrapper

• There is no associated HTML file
• The ABL procedure renders the HTML required
• Embedded within character strings
• Can reference variables and table field names

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Sample CGI Wrapper
src/web2/wrap-cgi.i output-content-type
("text/html"U). OUT "ltHTMLgt"U SKIP
"ltHEADgt"U SKIP "ltTITLEgt FILE-NAME
lt/TITLEgt"U SKIP "lt/HEADgt"U SKIP
"ltBODYgt"U SKIP. / Custom HTML / OUT
"Sample CGI Wrapper". OUT "lt/BODYgt"U SKIP
"lt/HTMLgt"U SKIP .
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Development Methodology
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Programming Considerations

• Separate UI from business logic
• HTML mapping
• HTML authored separately
• Match HTML tags with database fields

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Mapped Web Objects
Mapping HTML elements

• Separates HTML from ABL
• Can use HTML editor for HTML file
• Structured ABL files
• HTML can be maintained independently of the ABL
  code
• ABL fields mapped to HTML form elements
• ABL output rendered as values of form elements

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Mapped Web Objects HTML Form
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Mapped Web Objects Write Code
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Mapped Web Objects Generate Offset file
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Mapped Web Objects Run The App
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Programming Considerations
The state you are in

• Stateless typical web mode
• No limit on number of users
• Context management required
• Record locking / transaction management

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Agenda

• What is WebSpeed?
• A Web Request Round-trip
• WebSpeed Workshop
• Programming Considerations
• Security

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WebSpeed Security

• Disable WSMAdmin
• Set Application Mode to Production
• Disable debug mode
• Change all default ports
• Hide / rename your messengers
• Do not give execute permission to upload
  directory
• Applies to WebSpeed only still need to secure
  the rest of your environment

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WebSpeed Benefits

• Zero footprint
• Update UI without impacting business logic
• Supports intra-, extra- and internet
• Flexible programming model
• Choice of
• Authoring tools
• ISAPI, NSAPI, CGI
• HTML, JavaScript, Java, ActiveX, DHTML, ASP, etc

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In Summary

• Ultimate thin client
• Browser based access to business applications
• Scalable
• Flexible programming model

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For More Information, go to

• PSDN
• WebSpeed Product Information page
• Relevant Exchange Sessions
• ARCH-7 Multiple "Views" with WebSpeed
• INNOV-6 Rich User Interface for the Web? AJAX to
  the Rescue

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Education / Documentation References

• WebSpeed Application Development

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Questions?
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Thank you foryour time
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