How to fix broken API responses with Apache proxy

I've been stuck on this for a while and I have difficulties looking for a solution.

I have an application that calls an api and it was hosted in a docker and a reverse proxy in apache.

I noticed that every time I request to any of my apis, I always get weird behaviour like the actual error message (which is in json format) are not being displayed.

After a long investigation, I noticed that the api that returns an error (e.g.: 400, 401, etc..) always returns html error message/page.

If you are like me, hope you find this 😀

Just add this line:

<If "%{HTTP_ACCEPT} =~ /json/">
     ProxyErrorOverride Off
</If>

In your apache vhost config.

 

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