Enable experimental feature http2

Hello,

I’ve got this error when i want to use superagent to send an API request :

superagent: Enable experimental feature http2
(node:20298) ExperimentalWarning: The http2 module is an experimental API.
(node:20298) UnhandledPromiseRejectionWarning: Error: Unauthorized
    at Request.callback (/home/admin/www/imf-nodeapps/node_modules/superagent/lib/node/index.js:783:15)
    at IncomingMessage.parser (/home/admin/www/imf-nodeapps/node_modules/superagent/lib/node/index.js:1015:18)
    at emitNone (events.js:106:13)
    at Stream.emit (events.js:208:7)
    at Unzip.unzip.on (/home/admin/www/imf-nodeapps/node_modules/superagent/lib/node/unzip.js:55:12)
    at emitNone (events.js:111:20)
    at Unzip.emit (events.js:208:7)
    at endReadableNT (_stream_readable.js:1064:12)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)
(node:20298) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:20298) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code

do you have any ideas what i have to do?

thanks

[kornelski]

OK, I’ve checked the code:

Ignore the HTTP2 line. It’s always printed on Node 10 and later. It’s not an error, and it doesn’t mean anything.

The error is about lack of .catch() in your code.

Your problem is only later “UnhandledPromiseRejectionWarning: Error: Unauthorized”. That means you have made HTTP request to a server, but the server returned status 403, and you’ve ignored that error by not having .catch() in your code.

Every time you use .then(), you must also catch Promise errors (i.e. have .catch() somewhere later, or 2-argument version of .then(), or use async/await syntax instead of then()).

When you launch node, add --trace-warnings, e.g.

node --trace-warnings index.js

and it will show you where you must add .catch() calls.

[kornelski]

It’s disabled on master