CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Creating Fluent REST Client Interface

using Delphi REST Client

Components

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Speaker

• Cesar Romero• Delphi Developer for 20 years• Embarcadero MVP• Delphi Developer at Trier Sistemas, Brazil

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

AGENDA

•Delphi REST Client Components

• Json Data Objects

• Fluent Interface API

•Delphi REST Client Fluent Interface API

•Examples

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Delphi REST Client Components

• Introduced in Delphi and C++Builder XE5• Since XE8 it is based on System.Net.HttpClient - WinHTTP

• HTTPS without OpenSSL • no more libeay32.dll and ssleay32.dll deploy

• System.Threading based• REST Debugger

• Sources available • C:\Program Files\Embarcadero\Studio\18.0\source\data\rest\restdebugger

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Json Data Objects

• JSON parser • Supports

• Delphi 2009-10.1 Berlin• Platforms Win32, Win64 and ARM Android (MacOS and iOS may work)

• MIT License (MIT)• Author: Andreas Hausladen• https://github.com/ahausladen/JsonDataObjects

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Json Data Objects - Features

• Fast dual JSON parser for parsing UTF8 and UTF16 without conversion

• Automatic creation of arrays and objects• Easy access mode with implicit operators• Compact and formatted output modes• Variants support• Null can be auto-typecasted to a value type • Progress callback support for loading large JSON strings

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Fluent Interface API, what is it?

“...fluent interface is an implementation of an object oriented API that aims to provide more readable code.”

https://en.wikipedia.org/wiki/Fluent_interface

• normally implemented using a method cascading/method chaining• define through the return value of a called method• self-referential, where the new context is equivalent to the last context• terminated through the result of a void context

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Delphi REST Client Fluent Interface

• Interface Based• Uses Delphi REST Components • Uses Json Data Objects• Flexible and extensible• Very easy to use• MIT License (MIT)• https://bitbucket.org/cesarliws/delphi-fluent-rest-client

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Delphi REST Client Fluent Interface - Example

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Delphi REST Client Fluent Interface - Demos

• https://bitbucket.org/cesarliws/delphi-fluent-rest-client

CodeRage XI – Productivity, Platforms and Performance – embt.co/CodeRageXI

Thank you!cesarliws@gmail.com