Eloqua Upload Image API Error In Powershell

User_00P7C Posts: 2 Green Ribbon

Hi I'm trying to upload an image to Eloqua using the upload image API endpoint: /api/REST/1.0/assets/image/content .

When building this request in postman everything works fine and I'm able to upload the Image without problems. However when I use the Powershell script that Postman provides I cannot get the post to work and continue to run into this error:


Here is my code with the removal of a valid bearer token:

$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"

$headers.Add("Accept", "application/json")

$headers.Add("Authorization", "Bearer -------")

$multipartContent = [System.Net.Http.MultipartFormDataContent]::new()

$multipartFile = 'D:\KC_Events\KC_Integration\Eloqua\Images\TestImage.png'

$FileStream = [System.IO.FileStream]::new($multipartFile, [System.IO.FileMode]::Open)

$fileHeader = [System.Net.Http.Headers.ContentDispositionHeaderValue]::new("form-data")

$fileHeader.Name = "file"

$fileHeader.FileName = ""

$fileContent = [System.Net.Http.StreamContent]::new($FileStream)

$fileContent.Headers.ContentDisposition = $fileHeader


$body = $multipartContent

$response = Invoke-RestMethod 'https://secure.p04.eloqua.com/api/REST/1.0/assets/image/content' -Method 'POST' -ContentType "multipart/form-data; boundary=`"$boundary`"" -Headers $headers -Body $body

$response | ConvertTo-Json

Am I missing something?

Thanks to anyone who can provide information.


  • User_00P7C
    User_00P7C Posts: 2 Green Ribbon

    Turned out to be a very simple solution. The Postman provided powershell doesn't populate the $fileHeader.FileName = "". All I had to do is include the file name here $fileHeader.FileName = "TestImage.png" and the powershell post request worked.