Meteor loads incorrect HTTP handler, ignores object form of the "browser" field in package.json (Manifests as XMLHttpRequest unable to load on the client)

[raphaelarias]

Hi, I'm getting this error when I try to do a simple query in the client.

I tried to add the protocol parameter, and few other things, but I can't find the solution for this. Obviously in the server-side, everything works just fine.

XMLHttpRequest cannot load https://api.keen.io/3.0/projects/.../queries/count. Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. Origin 'http://localhost:3000' is therefore not allowed access. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

Thank you very much!

[dustinlarimer]

@raphaelarias thanks for reporting! We've seen this happen on occasion when an ad-blocker is breaking the request to our API. Do you have one enabled on your browser, and would you mind testing with it disabled?

[raphaelarias]

I'm not using any adblocker.

[raphaelarias]

Any insight into this? For normal queries I'm routing the requests to Keen through my server (which is good because I intercept and cache the queries), but what about the data explorer tool?

[dustinlarimer]

We haven't heard anything else of this issue, or know of anyone else specifically affected, so I would suspect an environmental issue at play. Are you wrapping the XMLHttpRequest object in any way? I'm not sure where to dig into this one.. these utilities of the SDK have been pretty heavily used for several years now.

[raphaelarias]

Intersting, I'm using Meteor, but I'm not wrapping the XMLHttpRequest in any way (maybe Meteor is?).

I'll try to create a repo where we can reproduce the error.

Quick question, is keen-js the recommended NPM package to use? I may have received an information that I should use the other standalone packages (dataviz and others).

[dustinlarimer]

Ah, ok- in that case, yes these standalone packages should help. There are some issues with superagent in meteor, which keen-js uses under the hood for HTTP requests.

Here are the new modules:

• keen-tracking.js
• keen-analysis.js
• keen-dataviz.js

We're in the process of rolling these into keen-js as a major version bump.

[dustinlarimer]

@raphaelarias we just rolled out v4 today, which bundles all of those modules together: https://github.com/keen/keen-js/releases/tag/v4.0.0

Looks like this issue is still present in Meteor: meteor/meteor#6890

[raphaelarias]

Awesome! Thanks!

[dustinlarimer]

Cross-posting and adding context, this issue seems to be related to Meteor's disregard for the object form of the "browser" field in package.json: keen/keen-analysis.js#15

[adamkasprowicz]

meteor/meteor#9311