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Web services: calling a Web service technical principles

Learn the technical principles necessary to create VIs that can call Web services which return information in the form of JSON strings.

Globe and telephone handset icons

Note: You may wish to begin with this overview of Web services.

Technical principles

Fundamental concepts

LabVIEW implementation of a Web service client

Study this video to learn about important LabVIEW VIs to call Web services; you may obtain the LabVIEW project files here:

https://youtu.be/xpVLENDliPI (5:07)

These VIs are described below; locate these elements with “Quick Drop” by pressing Ctrl + Space:

For more information

  1. JSON Basics: What You Need to Know (http://www.elated.com/articles/json-basics)
    Describes JSON syntax and how to form and parse JSON strings.
  2. The JavaScript Object Notation (JSON) Data Interchange Format (https://tools.ietf.org/html/rfc7159)
    Produced by the Internet Engineering Task Force (IETF), this document summarizes JSON syntax specifications and provides some examples.