Logic app http request failed to parse payload

Question

Logic app http request failed to parse payload

yang sun 26

Hi,

I wonder if anyone has the similar issue.
I am using HTTP request on Logic App to receive a web service Post call.
This message has a large payload including a document data in Base64 string format. When I used parse json for the HTTP request body, it just came back empty.
When I clicked on 'download' for the input and output, I can see the pay load of the HTTP request.

I am not sure how to get the HTTP request body data.
Thanks in advance.

Cheers,
Yang

Accepted answer

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Answer 1

Kamlesh Kumar 3,866

Hi @yang sun ,

I tried to create a dummy LogicApp with large input and process it through. It's working fine for me. Please refer the below screenshot for a reference.

Regards,
Kamlesh Kumar

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Kamlesh Kumar 3,866 Reputation points

2022-07-30T14:44:15.877+00:00

Hi @yang sun ,

Welcome to Microsoft Q&A Platform. Thank you for the question.

We would need more information here to help you out,

When I used parse json for the HTTP request body, it just came back empty. When I clicked on 'download' for the input and output, I can see the pay load of the HTTP request.

What do mean by it's came empty and then when you clicked on 'download' then payload of HTTP request is coming. Could you please share the payload and workflow screenshot of HTTP trigger.

Regards,
Kamlesh Kumar

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yang sun 26 Reputation points

2022-08-01T03:12:26.407+00:00

226574-payload.txt

Hi Kamlesh,
I have attached the payload.
Thanks so much.
Cheers,
Yang
Kamlesh Kumar 3,866 Reputation points

2022-08-01T03:57:46.797+00:00

Thanks for the sharing the payload. Size of payload is not big and it should work without enabling the chucking as well.

I tried to process the same file in below workflow and it's working fine.

You can pass the sample payload to generate the schema then in next step use the Body.
yang sun 26 Reputation points

2022-08-01T04:08:27.133+00:00

Hi Kamlesh,
That's exactly what I did. However when I use the fields from the parsed content, it didn't come back with any content. Can you set get the value of any of the field into an variable using the payload? Thanks in advance.
]2
Kamlesh Kumar 3,866 Reputation points

2022-08-01T04:17:09.273+00:00

After Initialize variable please use Set variable like below,
yang sun 26 Reputation points

2022-08-01T04:58:22.857+00:00

Hi Kamlesh,

Thanks so much for your help.
Yes, after I used 'set variable', it showed the value properly. I thought it was parsing issue, actually it was just me didn't use the 'set variable' properly.
Really appreciate your help.

Cheers,
Yang
yang sun 26 Reputation points

2022-08-01T05:04:47.047+00:00

Hi Kamlesh,

Thanks so much for your help.
Yes, after I used 'set variable', it showed the value properly. I thought it was parsing issue, actually it was just me didn't use the 'set variable' properly.
Really appreciate your help.

Cheers,
Yang

Answer 2

David Broggy 6,291 MVP Volunteer Moderator

Hi Yang,

There are definitely limitations on how much logic apps will process at a time, however there should be workarounds - see link below.

You might try the 'allow chunking' switch in your options or there may be another solution that the Q&A community can suggest.
logic-apps-handle-large-messages

yang sun 26 Reputation points

2022-08-01T03:13:36.217+00:00

Thanks David, I will check the allow chuncking switch.

Cheers,
Yang

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Logic app http request failed to parse payload

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