411 Length Required .Net Core Api hosted on IIS and ESP8266

Asked Mar 07 '20 at 19:35

Active Mar 07 '20 at 19:35

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I'm building .net core Api for my ESP8266 sensors. Sensors sending update in JSON. I'm getting 411 HTTP Error, but Content-Length is provided in request.

I think problem is in multiple Hypertext Transfer Protocol - see in wireshark screenshot - but how to solve this?

Api SourceCode

ESP8266 HTTP library adding Content-Length header here: SourceCode #L673

Request in Wireshark:

asked Mar 07 '20 at 19:35

PiotrK

1

you added extra CRLF(\r\n) after Authorization field. there should be single pair of them ( \r\n ). When you use some library you should not add CRLF yourself - library does this for you – Maxim Sagaydachny Mar 08 '20 at 06:19
This fixed my issue. Thank you! – PiotrK Mar 08 '20 at 14:07

411 Length Required .Net Core Api hosted on IIS and ESP8266

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