Sample code for 30+ languages & platforms
Xbase++

Inspect HTTP Request Header

Demonstrates the LastHeader property.

Chilkat Xbase++ Downloads

Xbase++
LOCAL nSuccess
LOCAL oHttp
LOCAL cUrl
LOCAL cJson
LOCAL oResp

nSuccess := 0

oHttp := CreateObject("Chilkat.Http")

cUrl := "https://chilkatsoft.com/echo_request_body.asp"
cJson := '{"greeting":"Hello World"}'

//  Send a POST with the JSON in the HTTP request body.
oResp := CreateObject("Chilkat.HttpResponse")
nSuccess := oHttp:HttpStr("POST", cUrl, cJson, "utf-8", "application/json", oResp)
IF (nSuccess == 0)
    ? oHttp:LastErrorText
    oHttp:destroy()
    oResp:destroy()
    RETURN
ENDIF

//  Examine the HTTP request header we just sent.
? oHttp:LastHeader

//  Output:

//  POST /echo_request_body.asp HTTP/1.1
//  Host: chilkatsoft.com
//  Accept: */*
//  Accept-Encoding: gzip
//  Content-Type: application/json
//  Content-Length: 26

oHttp:destroy()
oResp:destroy()