convert CURL request into VBA xml Object in MS-Access - vba

Question

I am trying to handle moodle data from our schools MS-Access database using VBA-code to post xml.objects.
I implemented the following code from an example for using the RESTful-API into my VBA-code (source https://moodle.org/plugins/webservice_restful):
json code:
curl -X POST \
-H "Content-Type: application/json" \
-H "Accept: application/json" \
-H 'Authorization: {token}' \
-d'{"options": {"ids":[6]}}' \
"https://localhost/webservice/restful/server.php/core_course_get_courses"
This is my conversion in VBA in a ms-access db module so far:
Option Compare Database
Option Explicit
Private Sub btnTestMoodleApi_Click()
Dim objRequest As Object
Dim strResult As String
Dim strPostData As String
Dim strToken as String
Dim strURL as String
strToken = xxx
strURL = xxx
Set objRequest = CreateObject("MSXML2.XMLHTTP")
strPostData = "'options[ids][0]=8'"
With objRequest
.Open "POST", strURL & "/webservice/restful/server.php/core_course_get_courses"
.setRequestHeader "Authorization", strToken
' .setRequestHeader Chr(34) & "Authorization" & Chr(34), Chr(34) & EncodeBase64(strToken) & Chr(34) ' is any of this necessary? I also tried single quotes chr(39)
.setRequestHeader "Content-Type", " application/x-www-form-urlencoded"
.setRequestHeader "Accept", "application/json"
.Send (strPostData)
While .ReadyState <> 4
DoEvents
Wend
strResult = .responseText
Debug.Print strResult
End With
End Sub
I am not sure if the following function that I found is necessary:
Function EncodeBase64(text As String) As String
Dim arrData() As Byte
arrData = StrConv(text, vbFromUnicode)
Dim objXML As MSXML2.DOMDocument60
Dim objNode As MSXML2.IXMLDOMElement
Set objXML = New MSXML2.DOMDocument60
Set objNode = objXML.createElement("b64")
objNode.DataType = "bin.base64"
objNode.nodeTypedValue = arrData
EncodeBase64 = objNode.text
Set objNode = Nothing
Set objXML = Nothing
End Function
Either way the return is an error that there was no authorization header in the request {"exception":"moodle_exception","errorcode":"noauthheader","message":"No Authorization header found in request sent to Moodle"}. I guessed it is a formatting problem, so I tried various sorts of quotes around what I guess is the header type declaration ("Authorization") and the token, nothing worked. Also I found this remark by another person under the CURL source:
"The authorization header was stripped by my version of Apache 2, resulting in a noauthheader error. It worked when added this directive:
SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1"
However I would not know if that error source applies to my case and how I would implement the directive in my VBA code. Any help would be very much appreciated! By the way this is the corresponding php code in a locallib.php file where I believe the curl request to be directed to:
* Get the webservice authorization token from the request.
* Throws error and notifies caller on failure.
*
* #param array $headers The extracted HTTP headers.
* #return string $wstoken The extracted webservice authorization token.
*/
private function get_wstoken($headers) {
$wstoken = '';
if (isset($headers['HTTP_AUTHORIZATION'])) {
$wstoken = $headers['HTTP_AUTHORIZATION'];
} else {
// Raise an error if auth header not supplied.
$ex = new \moodle_exception('noauthheader', 'webservice_restful', '');
$this->send_error($ex, 401);
}
return $wstoken;
}