Azure function: System.InvalidOperationException: Storage account connection string 'does not exist

Question

I have written an azure function, currently the azure function is acting as Webhook Consumer. The job of the function is to read Webhook events and save into azure storage. I am using an HTTP trigger template to get the job done. I am able to receive the events from the Webhook, but when I try to write to azure storage it is giving me below error.

I tried the option mentioned in this post, but no luck still getting the same error.

System.InvalidOperationException: Storage account connection string 'AzureWebJobs<AzureStorageAccountName>' does not exist. Make sure that it is a defined App Setting.

Below is my function.json file

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get",
        "post"
      ]
    },
    {
      "type": "blob",
      "name": "outputblob",
      "path": "test/demo",
      "direction": "out",
      "connection": "<AzureStorageAccountName>"
    }    
  ]
}

init.py

import logging

import azure.functions as func

def main(req: func.HttpRequest,outputblob: func.Out[str]) -> func.HttpResponse:
    logging.info('Python HTTP trigger function processed a request.')

    name = 'some_name'
    if not name:
        try:
            req_body = 'req_body_test'#req.get_json()
        except ValueError:
            pass
    else:
        name = 'name'#req_body.get('name')
    
    print(str(req.get_json()))

    outputblob.set(str(req.get_json()))

Answer 1

Please make sure you have already add the connection string to the local.settings.json on local or configuration settings on azure.

Please test below code and settings files:

__init__.py

import logging

import azure.functions as func


def main(req: func.HttpRequest,outputblob: func.Out[func.InputStream]) -> func.HttpResponse:
    outputblob.set("this is a test.")
    return func.HttpResponse(
            "Test.",
            status_code=200
    )

function.json

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get",
        "post"
      ]
    },
    {
      "type": "http",
      "direction": "out",
      "name": "$return"
    },
    {
      "name": "outputblob",
      "type": "blob",
      "path": "test/demo",
      "connection": "MyStorageConnectionAppSetting",
      "direction": "out"
    }
  ]
}

local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "",
    "FUNCTIONS_WORKER_RUNTIME": "python",
    "MyStorageConnectionAppSetting":"DefaultEndpointsProtocol=https;AccountName=0730bowmanwindow;AccountKey=xxxxxx;EndpointSuffix=core.windows.net"
  }
}

On azure: