Calling SOAP and REST API's from PL/SQL

Oct 2, 2017Download as PPTX, PDF1 like3,681 views

This document discusses SOAP and REST APIs. It defines an API as an interface that allows applications to communicate with each other by defining operations, inputs, outputs, and data types. APIs can be traditional server-to-server or web APIs, which are the focus. Web APIs exist in formats like SOAP, JSON-RPC, XML-RPC, and REST. SOAP APIs can communicate over different protocols but require SOAP libraries and rely on XML. REST APIs typically use HTTP and support various content types while being stateless and easier for developers. References are provided for sample SOAP and REST APIs that can be called from PL/SQL.

API Definition:
Is an interface to allow applications to
talk each other.

WHAT I SHOULD KNOW BEFORE
CALLING AN API ?
IT PROVIDES INFORMATION FOR HOW TO COMMUNICATE WITH A
SOFTWARE COMPONENT, DEFINING THE
– OPERATIONS (WHAT TO CALL)
– INPUTS (WHAT TO SEND WITH A CALL)
– OUTPUTS (WHAT YOU GET BACK FROM A CALL)
– UNDERLYING DATA TYPES

CATEGORIES OF APIS
APIS BELONG TO TWO CATEGORIES
– TRADITIONAL SERVER TO SERVER, LIBRARIES IN SOURCE
CODE
– WEB APIS (FOCUS WILL BE ON THIS THROUGHOUT THE
CLASS)
4

WEB APIS
OVER TENS OF THOUSANDS OF PUBLIC WEB APIS THAT HELP
CONNECT APPLICATIONS VIA THE INTERNET EXISTS
• WEB APIS ARE CREATED IN A WIDE RANGE OF WEB FORMATS AND
STANDARDS
– SOAP (SIMPLE OBJECT ACCESS PROTOCOL) APIS
– RPC (REMOTE PROCEDURE CALL) APIS
• JSON-RPC APIS
• XML-RPC APIS
– REST (REPRESENTATIONAL STATE TRANSFER) APIS
5

SOAP API
CAN BE USED ACROSS DIFFERENT COMMUNICATION PROTOCOLS
(HTTP, SMTP, UDP)
• REQUIRE SOAP LIBRARY IN THE CLIENT TO BUILD AND RECEIVE
REQUESTS
• CAN BE STATEFUL OR STATELESS
• REQUIRES EXTENSIVE PROGRAMMING KNOWLEDGE
• RELY HEAVILY ON XML FORMAT FOR DEFINING A WEB SERVICE
(WSDL) – XML FORMAT RESULTS IN MORE LINES OF CODE WHICH
RESULTS IN BIGGER MESSAGE SIZES MAKING THEM UNWIELD 6

SOAP REFERENCES
Sample SOAP
http://webservicex.net/new/home
Take any soap wsdl file from the above link, validate the wsdl and follow the
instructions given in below link.
Calling soap services in pl/sql
https://martin-mares.com/2010/08/oracle-db-consume-wsdl-
webservice-in-plsql/
7

REST (REPRESENTATIONAL
STATE TRANSFER)
• Typically used over http
• supports any content type (xml, json, yaml…)
• requires single command for multiple actions
• stateless
• are less difficult for new developers to use compared to soap apis
8

REST REFERENCE
Sample REST
http://training-american-ws.cloudhub.io/api/flights
Follow the instruction given in below link.
Calling rest apis from pl/sql
Https://technology.Amis.Nl/2015/05/11/invoke-a-rest-service-
from-plsql-make-an-http-post-request-using-utl_http-in-oracle-
database-11g-xe/
9

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Calling SOAP and REST API's from PL/SQL

1. SOAP AND REST APIS

2. API Definition: Is an interface to allow applications to talk each other.

3. WHAT I SHOULD KNOW BEFORE CALLING AN API ? IT PROVIDES INFORMATION FOR HOW TO COMMUNICATE WITH A SOFTWARE COMPONENT, DEFINING THE – OPERATIONS (WHAT TO CALL) – INPUTS (WHAT TO SEND WITH A CALL) – OUTPUTS (WHAT YOU GET BACK FROM A CALL) – UNDERLYING DATA TYPES

4. CATEGORIES OF APIS APIS BELONG TO TWO CATEGORIES – TRADITIONAL SERVER TO SERVER, LIBRARIES IN SOURCE CODE – WEB APIS (FOCUS WILL BE ON THIS THROUGHOUT THE CLASS) 4

5. WEB APIS OVER TENS OF THOUSANDS OF PUBLIC WEB APIS THAT HELP CONNECT APPLICATIONS VIA THE INTERNET EXISTS • WEB APIS ARE CREATED IN A WIDE RANGE OF WEB FORMATS AND STANDARDS – SOAP (SIMPLE OBJECT ACCESS PROTOCOL) APIS – RPC (REMOTE PROCEDURE CALL) APIS • JSON-RPC APIS • XML-RPC APIS – REST (REPRESENTATIONAL STATE TRANSFER) APIS 5

6. SOAP API CAN BE USED ACROSS DIFFERENT COMMUNICATION PROTOCOLS (HTTP, SMTP, UDP) • REQUIRE SOAP LIBRARY IN THE CLIENT TO BUILD AND RECEIVE REQUESTS • CAN BE STATEFUL OR STATELESS • REQUIRES EXTENSIVE PROGRAMMING KNOWLEDGE • RELY HEAVILY ON XML FORMAT FOR DEFINING A WEB SERVICE (WSDL) – XML FORMAT RESULTS IN MORE LINES OF CODE WHICH RESULTS IN BIGGER MESSAGE SIZES MAKING THEM UNWIELD 6

7. SOAP REFERENCES Sample SOAP http://webservicex.net/new/home Take any soap wsdl file from the above link, validate the wsdl and follow the instructions given in below link. Calling soap services in pl/sql https://martin-mares.com/2010/08/oracle-db-consume-wsdl- webservice-in-plsql/ 7

8. REST (REPRESENTATIONAL STATE TRANSFER) • Typically used over http • supports any content type (xml, json, yaml…) • requires single command for multiple actions • stateless • are less difficult for new developers to use compared to soap apis 8

9. REST REFERENCE Sample REST http://training-american-ws.cloudhub.io/api/flights Follow the instruction given in below link. Calling rest apis from pl/sql Https://technology.Amis.Nl/2015/05/11/invoke-a-rest-service- from-plsql-make-an-http-post-request-using-utl_http-in-oracle- database-11g-xe/ 9

10. 10 Thank You

Calling SOAP and REST API's from PL/SQL

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