November 2018
Beginner
132 pages
2h 57m
English
Content preview from Server Side development with Node.js and Koa.js Quick Start Guide
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Context object API
The context object exposes various methods and properties to help with HTTP application development and middleware creation. In this way, Koa varies from its predecessor, Express, in that the many functions needed for development can be accessed simply via the context object instead of needing to access the request (req) and response (res) objects separately.
Some of the methods and properties exposed on the Context object include the following:
- ctx.req: This serves as a reference to the request object in Node. Note that this differs from the Koa request object.
For example, you can access an object containing the request headers by using the req.headers property, as seen here:
console.log(ctx.req.headers);// => { host: ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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