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ProxyKit–Bad gateway error

We are using ProxyKit as an API proxy for our Geo services. But although it worked perfectly on our development environment and when talking to our GeoServer, it failed with the following exception when we tried to access an ASP.NET Core API through the same proxy:

502 Bad Gateway

This turned out to be a bug in ProxyKit version 2.2.1. ProxyKit sets an empty content when executing a GET request. ASP.NET Core doesn’t like this as it expects that GET requests doesn’t have a body.

As a work around I explicitly set the content to null when executing a GET request:

Remark: A new version 2.2.2 was released last week to fix the issue: https://github.com/damianh/ProxyKit/releases/tag/v2.2.2.

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