January 2019
Intermediate to advanced
490 pages
15h 37m
English
Content preview from Serverless Programming Cookbook
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Mapping templates and variables
You can map the requests and responses in API Gateway by using API Gateway's body mapping templates, based on the Apache VTL and JSONPath expressions.
The $input variable provided by the API Gateway represents the input payload (a request payload or response payload, based on the case) and the parameters available to the template. The function $input.json() retrieves part of the JSON, as specified by a JSONPath expression. In JSONPath, $ represents the outer-level JSON object. $input.json('$.user.name') returns the value of the field name within the user object, and $input.json('$.greeting.time') returns the value of the field time within the greeting object. Similarly, $input.json('$.message') returns the ...
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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.