Invoke-RestMethod to Post API Error

Question

Tearing my hair out with this, i'm trying to use the kanboard API (kanboard.org) from powershell, essentially using curl which from investigation is exactly what Invoke-RestMethod is.

I'm getting the following error;

Invoke-RestMethod : Cannot bind parameter 'Headers'. Cannot convert the ""X-API-Auth",
"agBzAG8AbgByAHAAYwA6ADQAMgBjAGQANwAwADEAMgA3ADgAMgAyAGMAYwBiAGUANwA1ADcAMAA3AGYANQBmAGUAZQA2ADkANgBmADYAYQA1AGIAOQAwADIANABiADEAZQBhADAANwBjAGIAOQA1ADQAYQA5AGQAYQA5AGMAYQAwAGYAYgA0AA=="" value of type
"System.String" to type "System.Collections.IDictionary".
At line:1 char:77
+ ... RestMethod -Uri $kanboardserver -Method Post -Headers $header -Body $ ...
+                                                           ~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Invoke-RestMethod], ParameterBindingException
    + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

My API call code using powershell is this;

$kanboardserver = "http://mykanboardserver/jsonrpc.php"
$kanboardtoken = "jsonrpc:42cd70127822ccbe75707f5fee696f6a5b9024b1ea07cb954a9da9ca0fb4"
$converted = $kanboardtoken | ConvertTo-Base64

$headersKan = New-Object "System.Collections.Generic.Dictionary[[String],[String]]" -ErrorAction Stop
$headersKan.Add("X-API-Auth", $converted)

$payload = @{ jsonrpc = "2.0"; 
            method = "getAllProjects"; 
            id = 1;
            } | ConvertTo-Json

$responseKan = Invoke-RestMethod -Uri $kanboardserver -Method Post -Headers $header -Body $payload -ErrorAction Stop
Write-Host $responseKan

Just for reference this is the documentation example of how to invoke the API using CURL which is what i based my above code on. (https://docs.kanboard.org/en/latest/api/examples.html)

curl \
-u "jsonrpc:19ffd9709d03ce50675c3a43d1c49c1ac207f4bc45f06c5b2701fbdf8929" \
-d '{"jsonrpc": "2.0", "method": "getAllProjects", "id": 1}' \
http://localhost/kanboard/jsonrpc.php

Answer 1

Updated

You Should use an Hashtable for the headers IDictionary parameter, like this:

Regarding your base64 string, i don't know the ConvertTo-Base64 you are using, anyway this is how i do it:

$kanboardtoken = "jsonrpc:57c9d99c1f5629959d237822a000a20b22913c71688e6520e5638beec11b"
$Base64 = [System.Convert]::ToBase64String([System.Text.Encoding]::UTF8.GetBytes($kanboardtoken))


$headers = @{
'X-API-Auth' = $Base64
}

$payload = @{ jsonrpc = "2.0"; 
            method = "getAllProjects"; 
            id = 1;
            } | ConvertTo-Json

$responseKan = Invoke-RestMethod -Uri $kanboardserver -Method Post -Headers $headers -Body $payload -ErrorAction Stop

Answer 2

Thanks, So i'm back to an error I have come across before, which is an authorization problem.

Invoke-RestMethod : {"jsonrpc":"2.0","error":{"code":401,"message":"Unauthorized"},"id":null}

I know the token is correct as I have mocked up a php client and the API is working.

The latest code that gives me this error is below, it has to be with the way the header is formed, I can't think of anything else.

 $kanboardserver = "http://mykanboardserver/jsonrpc.php"
    $kanboardtoken = "jsonrpc:57c9d99c1f5629959d237822a000a20b22913c71688e6520e5638beec11b" | ConvertTo-Base64

    $headers = @{
        'X-API-Auth' = $kanboardtoken
        }

    $payload = @{ jsonrpc = "2.0"; 
                method = "getAllProjects"; 
                id = 1;
                } | ConvertTo-Json


        $responseKan = Invoke-RestMethod -Uri $kanboardserver -Method Post -Headers $headers -Body $payload -ErrorAction Stop
        Write-Host $responseKan