Download conferences.embarcadero.com

www.arcanatech.com
Web Application Development
in IntraWeb
Session #2006
Presented by
Jason Southwell
Arcana Technologies
www.arcanatech.com
Who am I?
●
Delphi Developer since 1995
●
President of Arcana
●
Consultant
●
Freelance Author
●
Member of
●
A-Team, TeamZed
●
Indy Core
●
FreeCLX, CrossFPC
www.arcanatech.com
Who are You???
www.arcanatech.com
IntraWeb
●
Radically simple web development
●
Application Based Framework
●
Process Identical to VCL Development
●
●
●
Cross-platform / Cross-environment
Included in Delphi 7 (IW 5.1) and Delphi
2005 (IW 7.2)
No need for HTML / JS / CSS
●
But the knowledge will help you...
www.arcanatech.com
Component Usage
●
●
All non-visual thread-safe components
IntraWeb forms are a special type of
form and require custom IW specific
visual components
●
●
Most standard VCL visual components have IW
replacements
Powerful 3rd Party IW Components
●
TMS - www.tmssoftware.com
●
Arcana - www.arcanatech.com
www.arcanatech.com
Structure of a Project
●
DPR
●
●
ServerController
●
●
Global server settings
UserSession
●
●
Varies depending on whether you are building
a Service, Standalone, ISAPI or DSO
Session based data module
Unit1
●
Your first visual IW form
www.arcanatech.com
Deployment
●
ISAPI
●
●
Standalone
●
●
Custom Indy based web server
Service
●
●
IIS, Omni, Apache, others
Custom Indy based web server
DSO
●
Apache (not supported in D2005/2006)
www.arcanatech.com
Deployment Requirements
●
Standalone / Service
●
●
ISAPI
●
●
Upload exe and execute (or install service).
Upload to scripts folder on web server or
configure script application on IIS
DSO
●
Upload to web server & edit Apache config file
May require additional files:
●
●
●
●
Images
Flash Animation, Movies
StyleSheets/Script
The “Files” & “Cache” subdirectories
www.arcanatech.com
Layout Options
●
Delphi Form Designer
●
Most like VCL development
●
Anchors & Alignment
●
Compatible with Delphi Frames
●
Form Inheritance
●
Regions (panels)
●
Visual changes require recompile
www.arcanatech.com
Layout Options
●
●
Runtime HTML Templates
●
Requires HTML/JS/CSS knowledge
●
Design HTML files and “embed” IW controls
●
HTML files with {% %} tags
●
Visual changes do not require recompile
●
Hand off visual design to web designers.
Design-time HTML Designer
●
Design-time Template editor
●
Embeds Templates in dfm file
●
Visual changes require recompile
www.arcanatech.com
Database Connectivity
●
●
Nearly any Database components
●
ADO
●
dbExpress
●
IBX / IBO / FreeIB
●
Zeos
●
DBISAM / NexusDB
●
BDE (but not recommended)
UserSession based DataModule
www.arcanatech.com
Design Considerations
●
No Global Variables
●
Thread-safety
●
Report Delivery
●
Resource Management
●
Custom Components
●
Missing Events
www.arcanatech.com
Maximizing Scalability
●
Reduce Page Response Time
●
Decrease Memory Footprint
●
●
Release forms when not in use
●
Don't overuse UserSession for storage
Improve Code Efficiency
●
●
http://arcanatech.com/optimalcode.html
Use a replacement Memory Manager
●
NexusDB Memory Manager 3
●
FastMM4 (free)
www.arcanatech.com
Maximizing Scalability
●
Beware Synchronization Objects
●
Reduce Bandwidth Requirements
●
●
Increase Server Specs
●
●
Partial Updates
Memory/CPU/Bandwidth
Add Additional Server Machines
●
Software Switch – Octagate
●
Hardware Switch – Layer 5-7
●
DNS Round Robin
www.arcanatech.com
Database Pooling
●
Built-in pooling support
●
DataModule Based Pool
●
Positives
●
Improves Responsiveness
●
Reduces Memory Usage
●
Improves Scalability
●
●
Simplifies DB access from Threads &
ServerController
Negatives
●
Makes Working with data-aware components
more difficult, though not impossible.
www.arcanatech.com
Reducing Session Count
●
●
●
Termination
●
User must initiate termination
●
Or wait for session timeout
Re-entry
●
Limits duplicate sessions
●
Returns user to last viewed form & state
Single Instance Sessions
●
Limits duplicate sessions
●
Limits user's multi-tasking capabilities
www.arcanatech.com
Page Based Modes
●
●
Page Mode
●
Based on WebBroker
●
Can Integrate WebSnap / WebServices
●
No Session/State Management
●
Series of “disconnected” pages
●
Like a compiled ASP, PHP or ASP.NET
●
PageMode included with D7 / D2005 Pro
IWP Mode
●
Page Mode with static page delivery.
●
Static Page
www.arcanatech.com
Render Modes
●
●
3.2 Mode
●
Works in all HTML browsers
●
Does not require Javascript
●
Requires use of Templates
WAP Mode
●
Renders to WML
●
Works in cellphone browsers
●
Can use WML Templates, but not required
www.arcanatech.com
JavaScript Integration
●
Javascript Resources
●
www.dynamicdrive.com
●
www.javascriptcity.com
●
www.codelifter.com
●
IWTop()
●
FindElem()
●
SubmitClick(), SubmitClickConfirm()
www.arcanatech.com
User Authentication
●
●
HTTP Authentication
●
Web Standard
●
Plain Text Passwords
●
Simple to Implement
Custom Login Forms
●
More Flexible
●
Plain Text Passwords
●
Have Secured and Unsecured Pages
●
Variable Session Timeouts
www.arcanatech.com
Secure Applications
●
●
●
HTTPS
●
Authenticates Server
●
Encrypts Web Traffic
●
Cert.pem & Key.pem
●
Indy Specific OpenSSL Libraries
SSL Certificates
●
Verisign / GEOTrust / RapidSSL
●
Self-signed Certs
SSL Buddy
www.arcanatech.com
Custom Components
●
●
Base Objects
●
TComponent – Non-visual
●
TIWControl – Visual
Interfaces
●
IIWBaseComponent, IIWBaseControl,
IIWBaseContainer
●
IIWInputControl, IIWSubmitControl
●
IIWTabOrder
●
IIWSubmitInvisible
●
IIWUpdateNotified
www.arcanatech.com
Custom Components
●
●
Important Method Overrides
●
InitControl()
●
SupportsInput()
●
RenderHTML()
●
Submit()
●
SetValue()
●
IWPaint()
Important Helper Objects
●
RenderContext, PageContext
●
TIWHTMLTag
www.arcanatech.com
Custom Components
●
Default Paint Handlers
●
File Upload, RadioButton, RadioGroup
●
Rectangle, Label, Button, Edit
●
Checkbox, ComboBox, ListBox
●
Memo, Link, Text, Image, HRule
●
List, DBNavigator, ProgressBar, Region
●
TabControl, TabPage
www.arcanatech.com
Any Questions?