Using Web Services

[Pages:57]Using Web Services

Chapter 13

Python for Informatics: Exploring Information



Unless otherwise noted, the content of this course material is licensed under a Creative Commons Attribution 3.0 License. .

Copyright 2009- Charles Severance.

Data on the Web

? With the HTTP Request/Response well understood and well

supported there was a natural move toward exchanging data between programs using these protocols

? We needed to come up with an agreed way to represent data going

between applications and across networks

? There are two commonly used formats: XML and JSON

Sending Data across the lNetz

Python

Dictionary

Java

HashMap

a.k.a. lWire Protocolz - What we send on the lwirez

Agreeing on a lWire Formatz

Python

Dictionary

Chuck

De-Serialize

Serialize

303 4456

Java

HashMap

XML

Agreeing on a lWire Formatz

Python

Dictionary

{

"name" :

De-Serialize

"Chuck",

"phone" :

Serialize

"303-4456"

}

Java

HashMap

JSON

XML lElementsz (or Nodes)

? Simple Element

? Complex Element

Chuck

303 4456

Noah

622 7421

XML

Marking up data to send across the network...



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