Azure python function Exception while executing function: Functions.HttpExample. System.Private.CoreLib: Result: Failure

Question

I have a azure python function. I am trying to post data to an API endpoint through my function. Below is the code I have for the same,

import logging
import azure.functions as func
def main(req: func.HttpRequest) -> func.HttpResponse:
    logging.info('Python HTTP trigger function processed a request.')
    try:
        req_body = req.get_json()
        url = "https://example.com/msgs"
        payload= req.get_body()
        headers = {
        'Authorization': 'mytoken ',
        }
        response = func.HttpRequest(method="POST", url=url, headers=headers, body=payload,params=None,route_params=None) 
        return func.HttpResponse("", response)
    except :
        func.HttpResponse(
             "This HTTP triggered function executed successfully. Pass a name in the query string or in the request body for a personalized response.",
             status_code=200
        )

Every time I invoke my function, I get below error,

Executed 'Functions.HttpExample' (Failed, Id=bc8a184c-7b20-4946-a92c-ed2afad66e56, Duration=17ms)
[2021-10-15T20:14:11.494Z] System.Private.CoreLib: Exception while executing function: Functions.HttpExample. System.Private.CoreLib: Result: Failure
Exception: TypeError: unable to encode outgoing TypedData: unsupported type "<class 'azure.functions.http.HttpResponseConverter'>" for Python type "NoneType"
Stack:   File "C:\Program Files\Microsoft\Azure Functions Core Tools\workers\python\3.9\WINDOWS\X64\azure_functions_worker\dispatcher.py", line 427, in _handle__invocation_request
    return_value = bindings.to_outgoing_proto(
  File "C:\Program Files\Microsoft\Azure Functions Core Tools\workers\python\3.9\WINDOWS\X64\azure_functions_worker\bindings\meta.py", line 116, in to_outgoing_proto
    datum = get_datum(binding, obj, pytype)
  File "C:\Program Files\Microsoft\Azure Functions Core Tools\workers\python\3.9\WINDOWS\X64\azure_functions_worker\bindings\meta.py", line 107, in get_datum
    raise TypeError(

Can anyone help me to fix this issue? or tell me a way to make a POST call from azure python function?

Thanks, Tintu

You can refer to unable to encode outgoing TypedData. You can also open an issue on GitHub: Azure/azure-functions-python-worker — Ecstasy
– Ecstasy, Commented Oct 19, 2021 at 9:34
I have the same issue here. I can't quite make sense of the proposed "answers". Anyone have more details? — SeaDude
– SeaDude, Commented May 28, 2022 at 22:25

Irina · Accepted Answer · 2022-06-09 10:20:25Z

7

I had the same error, but my problem was different. I had commented out a block of code, which included the following line:

return func.HttpResponse(“Request processed successfully.”, status_code=200)

Commenting out this line meant that the function would end without an HTTP response, therefore returning None. That is where the “None” type in my error came from. I hope this helps somebody else!

answered Jun 9, 2022 at 10:20

Irina

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Rafael K. N. · Accepted Answer · 2022-02-01 00:31:42Z

0

I had the same problem!

I get this error:

Exception while executing function: Functions.DouMonitorHttpStart <--- Result: Failure Exception: TypeError: unable to encode outgoing TypedData: unsupported type "<class 'azure.functions.http.HttpResponseConverter'>" for Python type "dict" Stack: File "/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/dispatcher.py", line 427, in _handle__invocation_request return_value = bindings.to_outgoing_proto( File "/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/bindings/meta.py", line 116, in to_outgoing_proto datum = get_datum(binding, obj, pytype) File "/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/bindings/meta.py", line 107, in get_datum raise TypeError(

But after a re-run, it eventually succeeds.

answered Feb 1, 2022 at 0:31

Rafael K. N.

1

1 Comment

Kaz Over a year ago

This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. To get notified when this question gets new answers, you can follow this question. Once you have enough reputation, you can also add a bounty to draw more attention to this question. - From Review

Himanshu Punjabi · Accepted Answer · 2022-03-30 19:42:46Z

0

This happened with me with I had a try block and a finally block, without a except or a else block. I added an except and a else block and it worked fine.

answered Mar 30, 2022 at 19:42

Himanshu Punjabi

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1 Comment

Andres Mitre Over a year ago

Thanks for answering, I just had a loggin.info adding a try, except, else worked for me.

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