to produce
start the ./functional-test-server
then
curl -X GET --header "content-type: application/json" -v http://127.0.0.1:8080/echo --next --header "content-type: application/json" -v http://127.0.0.1:8080/headers
the expected behavior is the receive on client side
Host: 127.0.0.1:8080
User-Agent: curl/8.1.2
Accept: */*
content-type: application/json
the acutul behavior is no response on server side, for the server the url is not valid parsed, added the screenshot for information

to produce
start the ./functional-test-server
then
the expected behavior is the receive on client side
the acutul behavior is no response on server side, for the server the url is not valid parsed, added the screenshot for information