May 2019
Intermediate to advanced
546 pages
12h 41m
English
Content preview from Salesforce Platform Developer I Certification Guide
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Web service callouts
The last part of our Apex journey is a callout to a web service. You know that Twitter and Facebook, and even Salesforce, have a web service that you can connect with and grab the information you need. Some APIs are free to use, but for some information, you need to pay if you want to use or store that information.
For each secure web service, you need to authenticate to the service. This can be done in different ways and is dependent on the web service itself. Some easy APIs use only an API key, while other services use OAuth2.0 to authenticate.
The type of authentication should be found in the documentation of the API. Most of the time, you can find this documentation online, or contact the API vendor to receive this ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.