What does this error mean: HPE_INVALID_CONSTANT?

[Hightower444]

I was receiving HPE_INVALID_CONSTANT when making HTTP requests with NodeJS the other day. They mysteriously stopped occurring recently, but I'm still baffled and curious what exactly HPE_INVALID_CONSTANT is trying to tell me.

My google search results are a bit slanted towards NodeJS, so I'm not picking up anything that describes more generally what this means. It looks like a system level error since it's all caps.

[Suman_1978]

Hi,

HPE_INVALID_CONSTANT
In this error HPE means (Http Parse Error), and not the HPE company.

This error comes from Node.js, and usually indicates Node.js couldn't parse an HTTP response when making a request to a server.

Thanks