Posting Document via VBA in Excel

Question

I have attempted to post a document in VBA by mimicking the syntax in the six programming languages listed in docusign documentation but no luck. I can successfully GET login information but using this information to POST a document proves fatal: here is the error I receive:

INVALID_MULTI_PART_REQUEST An error was found while parsing the multipart request. Boundary terminator '--BOUNDARY--' was not found in the request.

Any assistance would be appreciated. Here is the code I have so far:

Private Sub APILoginCallTest()

' Step 1 - get initial login information

' defined request and result variables
Set httpRequest = New XMLHTTP60
Set httpResult = New DOMDocument60

' clear out login information response fields
With ThisWorkbook.Sheets("Dashboard")
    .Range("rngResponseLoginStatus").Value = vbNullString
    .Range("rngResponseLoginFull").Value = vbNullString
End With

'open login information url
httpRequest.Open "GET", "https://demo.docusign.net/restapi/v2/login_information", False

' set headers (listed below)
With ThisWorkbook.Sheets("Dashboard")
    For h = 1 To 3
        httpRequest.setRequestHeader .Range("rngAPIHeaderLI0" & CStr(h)).Offset(0, -1).Value, _
            .Range("rngAPIHeaderLI0" & CStr(h)).Value
    Next h
End With
' currently headers are defined as follows (there are three) filling in the method above :
'   X-DocuSign-Authentication : <DocuSignCredentials>
'                                    <Username>[username]</Username>
'                                    <Password>[password]</Password>
'                                    <IntegratorKey>[ikey]</IntegratorKey>
'                                </DocuSignCredentials>
'   Accept : application/xml
'   Content-Type : application/xml

' send login information request
httpRequest.send

' record response in Dashboard worksheet for later review
With ThisWorkbook.Sheets("Dashboard")
    .Range("rngResponseLoginStatus").Value = httpRequest.Status & "-" & httpRequest.statusText
    .Range("rngResponseLoginFull").Value = httpRequest.responseText
End With

' display response in immediate window
Debug.Print "Login Status and Text=" & httpRequest.Status, httpRequest.statusText
Debug.Print "Login Response=" & httpRequest.responseText

' Step 2 signature request

' clear out sig request responses
With ThisWorkbook.Sheets("Dashboard")
    .Range("rngResponseSigRequestStatus").Value = vbNullString
    .Range("rngResponseSigRequestFull").Value = vbNullString
End With


' define the new URL for the signature request using the Base URL returned aboved appended with '/envelopes'
Dim sigURL As String
    sigURL = ThisWorkbook.Sheets("Dashboard").Range("rngResponseLoginBaseUrl").Value & "/envelopes"
' currently sig URL is 'https://demo.docusign.net/restapi/v2/accounts/[account number]'

Dim sigBody As String
    ' start the body of the request
    sigBody = "<envelopeDefinition xmlns=\" & Chr(34) & "http://www.docusign.com/restapi\" & Chr(34) & ">"

    ' add email info to the body
    sigBody = sigBody & "<emailSubject>API Call for adding signature request to document and sending</emailSubject>" & _
                        "<status>sent</status>"

    ' add documents to the body
    sigBody = sigBody & "<documents>" & _
                            "<document>" & _
                                "<documentId>1</documentId>" & _
                                "<name>" & ThisWorkbook.Sheets("Dashboard").Range("rngDocumentName").Value & "</name>" & _
                            "</document>" & _
                        "</documents>"

    ' add email recipients
    sigBody = sigBody & "<recipients>" & _
                            "<signers>" & _
                                "<signer>" & _
                                    "<recipientId>1</recipientId>" & _
                                    "<name>" & ThisWorkbook.Sheets("Dashboard").Range("rngRecipientName").Value & "</name>" & _
                                    "<email>" & ThisWorkbook.Sheets("Dashboard").Range("rngRecipientEmail").Value & "</email>" & _
                                    "<tabs>" & _
                                        "<signHereTabs>" & _
                                            "<signHere>" & _
                                                "<xPosition>100</xPosition>" & _
                                                "<yPosition>100</yPosition>" & _
                                                "<documentId>1</documentId>" & _
                                                "<pageNumber>1</pageNumber>" & _
                                            "</signHere>" & _
                                        "</signHereTabs>" & _
                                    "</tabs>" & _
                                "</signer>" & _
                            "</signers>" & _
                        "</recipients>"

    ' close the envelope definition
    sigBody = sigBody & "</envelopeDefinition>"


' read in document in byte array
Dim intFileNum%, bytTemp As Byte, intCellRow%
Dim bytTempAll As String
intFileNum = FreeFile
intCellRow = 0
Open (ThisWorkbook.Path & "\" & ThisWorkbook.Sheets("Dashboard").Range("rngDocumentName").Value) For Binary Access Read As intFileNum
Do While Not EOF(intFileNum)
   ' intCellRow = intCellRow + 1
    Get intFileNum, , bytTemp
    'Cells(intCellRow, 1) = bytTemp
    bytTempAll = bytTempAll & bytTemp
Loop
Close intFileNum
Dim lenFile As Long
    lenFile = Len(bytTempAll)   ' just curious

Set AdobeStream = CreateObject("ADODB.STREAM")
With AdobeStream
    .Type = 1 ' binary
    .Open   ' open the file
    .LoadFromFile (ThisWorkbook.Path & "\" & ThisWorkbook.Sheets("Dashboard").Range("rngDocumentName").Value)
End With

' create multipart/form-data request into a 'Pre' and a 'Post' with the document bytes eventually going in between
Dim requestBodyPre As String
    requestBodyPre = "\r\n\r\n--BOUNDARY\r\n" & _
            "Content-Type: multipart/form-data, boundary =BOUNDARY" & vbCrLf & _
            "Content-Length: " & lenFile & "\r\n" & _
            sigBody & _
            "\r\n\r\n--BOUNDARY\r\n" & _
            "Content-Type: " & ThisWorkbook.Sheets("Dashboard").Range("rngContentType").Value & "\r\n" & _
            "Content-Disposition: file; filename:\" & Chr(34) & ThisWorkbook.Sheets("Dashboard").Range("rngDocumentName").Value & Chr(34) & "\; " & _
            "documentid=1\r\n\r\n"

' break up the requestBody into 'Pre' and 'Post' because document bytes need to be passed in the middle

Dim requestBodyPost As String
    requestBodyPost = "\r\n" & "--BOUNDARY--\r\n\r\n"


' reset response variables for use in signature response
Set httpRequest = Nothing
Set httpResult = Nothing

Set httpRequest = New XMLHTTP60
Set httpResult = New DOMDocument60

' open url for signature POST
 Debug.Print "POST to url " & sigURL
httpRequest.Open "POST", sigURL, False

' attach headers
For h = 1 To 3
    httpRequest.setRequestHeader ThisWorkbook.Sheets("Dashboard").Range("rngAPIHeaderSR0" & CStr(h)).Offset(0, -1).Value, _
        ThisWorkbook.Sheets("Dashboard").Range("rngAPIHeaderSR0" & CStr(h)).Value
Next h
' currently headers are defined as follows (there are three) filling in the method above :
'   X-DocuSign-Authentication : <DocuSignCredentials>
'                                    <Username>[username]</Username>
'                                    <Password>[password]</Password>
'                                    <IntegratorKey>[ikey]</IntegratorKey>
'                                </DocuSignCredentials>
'   Accept : application/xml
'   Content-Type    multipart/form-data;  boundary=BOUNDARY

' send request
Dim streamAll As String
    'streamAll = StrConv(requestBodyPre, vbUnicode) & StrConv(requestBodyPost, vbUnicode)
    'streamAll = AdobeStream.readtext
 '
 Debug.Print "sending " & requestBodyPre
 Debug.Print "sending " & requestBodyPost

' post request
httpRequest.send requestBodyPre & AdobeStream.read & requestBodyPost

' record sig request response in worksheet
With ThisWorkbook.Sheets("Dashboard")
    .Range("rngResponseSigRequestStatus").Value = httpRequest.Status & "-" & httpRequest.statusText
    .Range("rngResponseSigRequestFull").Value = httpRequest.responseText
End With


Set httpRequest = Nothing
Set httpResult = Nothing
Set AdobeStream = Nothing

MsgBox "Done!"

End Sub

Answer 1

Really more of a question/comment, but this looks wrong:

sigBody = "<envelopeDefinition xmlns=\" & Chr(34) & _
          "http://www.docusign.com/restapi\" & Chr(34) & ">"

You don't escape " in VBA with \ , but by doubling them up:

sigBody = "<envelopeDefinition xmlns=""http://www.docusign.com/restapi"">"