(Chilkat2-Python) PayPal - Cancel Sent Invoice

Cancels a sent invoice, by ID, and, optionally, sends a notification about the cancellation to the payer, merchant, and Cc: emails.

Note: This example requires Chilkat v9.5.0.65 or greater.

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

import sys
import chilkat2

# Note: Requires Chilkat v9.5.0.65 or greater.

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

# Load our previously obtained access token. (see PayPal OAuth2 Access Token)
jsonToken = chilkat2.JsonObject()
jsonToken.LoadFile("qa_data/tokens/paypal.json")

# Build the Authorization request header field value.
sbAuth = chilkat2.StringBuilder()
# token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf("token_type"))
sbAuth.Append(" ")
sbAuth.Append(jsonToken.StringOf("access_token"))

# Make the initial connection.
# A single REST object, once connected, can be used for many PayPal REST API calls.
# The auto-reconnect indicates that if the already-established HTTPS connection is closed,
# then it will be automatically re-established as needed.
rest = chilkat2.Rest()
bAutoReconnect = True
success = rest.Connect("api.sandbox.paypal.com",443,True,bAutoReconnect)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

# ----------------------------------------------------------------------------------------------
# The code above this comment could be placed inside a function/subroutine within the application
# because the connection does not need to be made for every request.  Once the connection is made
# the app may send many requests..
# ----------------------------------------------------------------------------------------------

# Build the JSON request body containing the reminder information:
json = chilkat2.JsonObject()
json.EmitCompact = False
json.UpdateString("subject","Past due")
json.UpdateString("note","Canceling invoice")
json.UpdateBool("send_to_merchant",True)
json.UpdateBool("send_to_payer",True)
print(json.Emit())

# The JSON created by the above code:

# 	{ 
# 	  "subject": "Past due",
# 	  "note": "Canceling invoice",
# 	  "send_to_merchant": true,
# 	  "send_to_payer": true
# 	}

# Build a path using a previously-sent invoice ID.
sbPath = chilkat2.StringBuilder()
sbPath.Append("/v1/invoicing/invoices/invoice_id/cancel")
numReplacements = sbPath.Replace("invoice_id","INV2-XPWZ-NUTQ-LNWB-P8NC")

json.EmitCompact = True
sbRequestBody = chilkat2.StringBuilder()
sbResponseBody = chilkat2.StringBuilder()

rest.AddHeader("Content-Type","application/json")
rest.AddHeader("Authorization",sbAuth.GetAsString())
json.EmitSb(sbRequestBody)

success = rest.FullRequestSb("POST",sbPath.GetAsString(),sbRequestBody,sbResponseBody)
if (success != True):
    print(rest.LastErrorText)
    sys.exit()

print("Response Status Code = " + str(rest.ResponseStatusCode))

# In our testing, we received a 204 response, which is a success HTTP response code, but 
# differs from the PayPal REST API reference documentation, which states that a 202 response
# is expected.  I suspect an error in the PayPal documentation, or in the PayPal responder.
# Check for either 202 or 204..
# Did we get a 202 accepted response?
if ((rest.ResponseStatusCode != 202) and (rest.ResponseStatusCode != 204)):
    print(sbResponseBody.GetAsString())
    print("Failed.")
    sys.exit()

# The 202/204 response should be empty.  (Again, our experience differs from the online PayPal documentation..)
print("Success.")