Need to upload an image from a SharePoint folder to a 3rd Party App through their REST API

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Posted on by KO-10101805-0

I need help on how to configure/syntax of the body parm of the HTTP Request

Below is the example of the CURL from the 3rd Party testing tool

Based on the results from the below, I tried creating the HTTP POST but getting invalid JSON error. JSON below.. the base64 variable is "base64(outputs('Get_file_content')?['body'])" The file is an image in a Sharepoint Folder that I used the Get_file_Content call for.

CURL EXAMPLE:

curl
-X POST "https://**redacted****/libraryItems/uploadFile"
-H "accept: application/json"
-H "Content-Type: multipart/form-data"
-F "command={
"parentFolderId": 1121,
"fileType": "Single Brand Package Product File",
"fileStatus": "Active",
"customFields": [
{"fieldId": "BusinessPillar","value": ["Snacks"]},
{"fieldId": "Owner","value": ["US"],"fieldLabel": "Owner"},
{"fieldId": "PIMDate","value": ["2025-09-23 00:00:00.000-0500"],"fieldLabel": "PIM Date"},
{"fieldId": "Description","value": ["Product Benefit 1-No Package in Image-Z1NH"],"fieldLabel": "Description"}
]
}" -F "file=@00014500009821_C1C1_10117176.png;type=image/png"

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stampcoin 5,153 Super User 2026 Season 1 on at

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@KO-10101805-0 Hi,

You can have a try this:( with AI assistance), Please read the reference link to adjust the code accordingly.

{ "$content-type": "multipart/form-data", "$multipart": [ { "headers": { "Content-Disposition": "form-data; name=command", "Content-Type": "application/json" }, "body": { "parentFolderId": 1121, "fileType": "Single Brand Package Product File", "fileStatus": "Active", "customFields": [ { "fieldId": "BusinessPillar", "value": ["Snacks"] }, { "fieldId": "Owner", "value": ["US"], "fieldLabel": "Owner" }, { "fieldId": "PIMDate", "value": ["2025-09-23 00:00:00.000-0500"], "fieldLabel": "PIM Date" }, { "fieldId": "Description", "value": ["Product Benefit 1-No Package in Image-Z1NH"], "fieldLabel": "Description" } ] } }, { "headers": { "Content-Disposition": "form-data; name=file; filename=00014500009821_C1C1_10117176.png", "Content-Type": "image/png" }, "body": "@{body('Get_file_content')}" } ] }

reference link:

https://clavinfernandes.wordpress.com/2022/04/18/use-multipart-form-data-in-power-automate-or-logic-apps-http-action/

https://learn.microsoft.com/en-us/azure/connectors/connectors-native-http?tabs=standard#content-with-multipartform-data-type

https://nishantrana.me/2024/01/31/how-to-submit-multipart-form-data-using-http-action-in-power-automate-dataverse/

Hope this can help.

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KO-10101805-0 5 on at

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Fan-Freakin-Tastic!!! That was EXACTLY what I needed. I was so close, just needed the Content-Disposition addition of name=commend and the header for the file.

Thanks so much for the reply and example!!

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