Posting Image to Personal Profile Invalid Request Parameters - linkedin

Question

Unable to share image content through share endpoint, image asset is uploaded through assets API but my request to share API which is copied directly from the example here https://learn.microsoft.com/en-us/linkedin/marketing/integrations/community-management/shares/share-api?context=linkedin/compliance/context#share-content returns an error, invalid parameters in the request body [/Headers] see below details.
Request Headers:
{Authorization: Bearer ***
X-Restli-Protocol-Version: 2.0.0
}
Request Body
{"content":{"contentEntities":[{"entity":"urn:li:digitalmediaAsset:C5622AQEEn3mmqzCb5w"}],"title":"Great Result","landingPageUrl":"https://google.com.au","shareMediaCategory":"IMAGE"},"distribution":{"linkedInDistributionTarget":{}},"owner":"urn:li:person:zzR_UbXjsG","subject":"Great Result","text":{"text":"Great result, couldn't have gone better #realestate"}}
Scopes:
scope=r_emailaddress w_member_social w_organization_social r_basicprofile rw_company_admin rw_organization_admin
Error:
{"serviceErrorCode":100,"message":"Unpermitted fields present in REQUEST_BODY: Data Processing Exception while processing fields [/Headers]","status":403}

Answer 1

It looks like the error message has to do with the headers. Your request body is JSON, but you don't have a Content-Type header set, so this could be the problem:
Content-Type: application/json
Generally, you need a Content-Length header to be sent along with that, but most of the time the client you are using to send the request handles setting that one.
I'm not sure how you're making the request, but here is a fetch() example in JavaScript (make sure you put the correct auth token in the Authorization header):
const url = 'https://api.linkedin.com/v2/shares';
const requestBody = {
"content": {
"contentEntities": [
{
"entity": "urn:li:digitalmediaAsset:C5622AQEEn3mmqzCb5w"
}
],
"title": "Great Result",
"landingPageUrl": "https://google.com.au",
"shareMediaCategory": "IMAGE"
},
"distribution": {
"linkedInDistributionTarget": {}
},
"owner": "urn:li:person:zzR_UbXjsG",
"subject": "Great Result",
"text": {
"text": "Great result, couldn't have gone better #realestate"
}
};
async function makeRequest(url, requestBody) {
const response = await fetch(url, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer ***',
'X-Restli-Protocol-Version': '2.0.0'
},
body: JSON.stringify(requestBody) // body data type must match "Content-Type" header
});
return await response.json(); // parses JSON response into native JavaScript objects
}
// make the actual request
makeRequest(url, requestBody);