(Chilkat2-Python) Debug REST HTTP Request

Demonstrates how to generate the HTTP Request (with all headers intact) without actually sending the request.

Note: This example requires Chilkat v9.5.0.77 or later.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# This example will connect to the web server, but does not actually send a request.
# When in DebugMode, the request is composed in memory and can be retrieved by calling
# GetLastDebugRequest.

rest = chilkat2.Rest()

# Connect Code...
# URL: https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/returns
bTls = True
port = 443
bAutoReconnect = True
success = rest.Connect("test-api.service.hmrc.gov.uk",port,bTls,bAutoReconnect)
if (success != True):
    print("ConnectFailReason: " + str(rest.ConnectFailReason))
    print(rest.LastErrorText)
    sys.exit()

# Build the request body...
json = chilkat2.JsonObject()
json.UpdateString("periodKey","A001")
json.UpdateNumber("vatDueSales","105.50")
json.UpdateNumber("vatDueAcquisitions","-100.45")
json.UpdateNumber("totalVatDue","5.05")
json.UpdateNumber("vatReclaimedCurrPeriod","105.15")
json.UpdateNumber("netVatDue","100.10")
json.UpdateInt("totalValueSalesExVAT",300)
json.UpdateInt("totalValuePurchasesExVAT",300)
json.UpdateInt("totalValueGoodsSuppliedExVAT",3000)
json.UpdateInt("totalAcquisitionsExVAT",3000)
json.UpdateBool("finalised",True)

# Add Headers...
rest.AddHeader("Accept","application/vnd.hmrc.1.0+json")
rest.AddHeader("Authorization","Bearer HMRC_ACCESS_TOKEN")
rest.AddHeader("Content-Type","application/json")

sbRequestBody = chilkat2.StringBuilder()
json.EmitSb(sbRequestBody)

# Set DebugMode so that no request is actually sent.
rest.DebugMode = True

sbResponseBody = chilkat2.StringBuilder()
success = rest.FullRequestSb("POST","/organisations/vat/MY_HMRC_VRN/returns",sbRequestBody,sbResponseBody)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

# Get the exact contents of what would've been sent.
# This includes the HTTP start line, the HTTP request headers, and the request body.
# Given that it's possible for the request body to contain binary data,
# the GetLastDebugRequest fetches into a BinData object.
# In this case, however, our request body contained JSON, so we can
# examine it as a string..
bdRequest = chilkat2.BinData()
success = rest.GetLastDebugRequest(bdRequest)

print("----")
print(bdRequest.GetString("utf-8"))
print("----")

# The output for the above case:

# POST /organisations/vat/MY_HMRC_VRN/returns HTTP/1.1
# Accept: application/vnd.hmrc.1.0+json
# Host: test-api.service.hmrc.gov.uk
# Authorization: Bearer HMRC_ACCESS_TOKEN
# Content-Type: application/json
# Content-Length: 281
# 
# {"periodKey":"A001","vatDueSales":105.50, ... ,"finalised":true}
# 
#