How to post json to Durable Azure Functions (Python)? - azure-durable-functions

Question

I have working Durable Function based on following tutorial. I have not modified code yet.
https://learn.microsoft.com/en-us/azure/azure-functions/durable/quickstart-python-vscode
How to send json file to Activity Function.
For debugging purposes how to do logging.info for json in Activity Function.
This function an HTTP starter function for Durable Functions.
import logging
import azure.functions as func
import azure.durable_functions as df
async def main(req: func.HttpRequest, starter: str) -> func.HttpResponse:
client = df.DurableOrchestrationClient(starter)
instance_id = await client.start_new(req.route_params["functionName"], None, None)
logging.info(f"Started orchestration (Ken) with ID = '{instance_id}'.")
return client.create_check_status_response(req, instance_id)
This function is an Orchestration Function
import logging
import json
import azure.functions as func
import azure.durable_functions as df
def orchestrator_function(context: df.DurableOrchestrationContext):
logging.info(f"CalcOrc")
result1 = yield context.call_activity('CalculateActivity', "Tokyo")
result2 = yield context.call_activity('CalculateActivity', "Seattle")
result3 = yield context.call_activity('CalculateActivity', "London")
return [result1, result2, result3]
main = df.Orchestrator.create(orchestrator_function)
This function is an Activity function
import logging
def main(name: str) -> str:
logging.info(f"CalcAct") # Could log contents of json sent by HTTP Post
return f"Hello {name}!"
This modified version an HTTP starter function. It works with Get but not with Post.
import logging
import json
import azure.functions as func
import azure.durable_functions as df
async def main(req: func.HttpRequest, starter: str) ->
func.HttpResponse:
#Added for testing
jsoninput = req.params.get('jsoninput')
client = df.DurableOrchestrationClient(starter)
#instance_id = await
client.start_new(req.route_params["functionName"], None, None)
instance_id = await
client.start_new(req.route_params["functionName"], jsoninput, None)
logging.info(f"Started orchestration with ID = '{instance_id}'.")
logging.info(f"jsonInput = '{jsoninput}'.")
return client.create_check_status_response(req, instance_id)

Answer 1

Below code will helps you to pass the json object data to the activity function:
Activity function:
def main(req: func.HttpRequest) -> func.HttpResponse:
req_body = req.get_json()
return func.HttpResponse(f"description is {req_body.get('description')}")