Where is the documentation on res.on('end'

Just cant find it! looking for documentation on the following on error, data, and end

return new Promise((resolve, reject) =>
https.get(setUrl(substr), (res) =>
let data = ''
res.on('data', (d) =>
data += d
);
res.on('end', () => resolve(data));
).on('error', reject);
);


https.get()

https

https

1 Answer
1

In the doc for https.get(), it says to go look at the doc for http.get() for the callback parameters.

https.get()

http.get()

There it says:

The callback is invoked with a single argument that is an instance of http.IncomingMessage.

http.IncomingMessage

And, if you then go look at the doc for http.IncomingMessage, you find that:

http.IncomingMessage

It implements the Readable Stream interface, as well as the following additional events, methods, and properties.

In that doc, you will find a description of the data and end events.

data

end

The https.get() itself returns an http.ClientRequest object and in the doc for http.request() which https.get() is derived from, it explains:

https.get()

http.ClientRequest

http.request()

https.get()

If any error is encountered during the request (be that with DNS resolution, TCP level errors, or actual HTTP parse errors) an 'error' event is emitted on the returned request object. As with all 'error' events, if no listeners are registered the error will be thrown.

Yes, it is work to follow all this. This is one of the aspects of object oriented design with lots of derived and common objects. You have to find the object being used or perhaps even the base object and then go look in its doc for find out how to use it.

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