POST Request node does not send headers to web service

Hi!

When I send POST request from Postman, I recieve successful response from web service. But when I send exactly the same POST request from KNIME, the status I recieve is 401 unauthorized (authorization header with token included).

I checked my outgoing requests with Wireshark and saw that the length of KNIME request is shorter than the Postman’s one (77 bytes vs 416 bytes). KNIME request does not contain headers (authorization header with token). The confirmation of this issue is that web service log file doesn’t contain any headers sent by me from KNIME.

KNIME request

Postman request

The difference between two requests above is in “User-Agent” header. I tried to change the value of “User-Agent” header in KNIME POST Request node but I still face the same

authorization issue.

I also tried different options in POST Request node (“Trust all certificates”, “Follow redirects” etc.) but it does not fix the issue.

As for test I sent several requests from KNIME to different web services and everything worked successfull.

Thank you!