classic asp calling an api using addheader for authorization

问题

I have a page that calls an api that in test mode has not required any authorization.
We are now moving to a live environment where a username and password will be required.

The api provider has sent the following message:

To access these services please send the requests by adding following HTTP header. Authorization: Basic Base64Encode(“username: password”)

I'm not sure of the correct syntax and wondered if someone could help me out.

The original call (and working perfectly) is:

Dim xmlobj, username, password
username="myusername"
password="mypassword"
Set xmlobj = server.CreateObject("MSXML2.DOMDocument.3.0")
xmlobj.async = false
xmlobj.setProperty "ServerHTTPRequest", True
xmlObj.AddHeader "Authorization", "Basic", Base64Encode(username & ":" & password)
xmlobj.load(sUrl)

The above code throws an error

/api-test.asp |20|800a000d|Type_mismatch:_'Base64Encode'

Any help would be greatly appreciated.

回答1:

Like I've mentioned in the comments, the syntax for the Authorization header is incorrect.

The API example doesn't expect "Base64Encode('username','password')" this is an example supplied by the API to show you how to take the string "username:password" and Base64 encode it which is what the Authorization header is expecting.

But you still need to have the Base64Encode() function definition for the code to work.

Base64Encode() and MyASC() functions are taken from Base64 encode VBS function (vb encoder algorithm), source code

Something like this should work;

<%
Function Base64Encode(inData)
  'rfc1521
  '2001 Antonin Foller, Motobit Software, http://Motobit.cz
  Const Base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
  Dim cOut, sOut, I

  'For each group of 3 bytes
  For I = 1 To Len(inData) Step 3
    Dim nGroup, pOut, sGroup

    'Create one long from this 3 bytes.
    nGroup = &H10000 * Asc(Mid(inData, I, 1)) + _
      &H100 * MyASC(Mid(inData, I + 1, 1)) + MyASC(Mid(inData, I + 2, 1))

    'Oct splits the long To 8 groups with 3 bits
    nGroup = Oct(nGroup)

    'Add leading zeros
    nGroup = String(8 - Len(nGroup), "0") & nGroup

    'Convert To base64
    pOut = Mid(Base64, CLng("&o" & Mid(nGroup, 1, 2)) + 1, 1) + _
      Mid(Base64, CLng("&o" & Mid(nGroup, 3, 2)) + 1, 1) + _
      Mid(Base64, CLng("&o" & Mid(nGroup, 5, 2)) + 1, 1) + _
      Mid(Base64, CLng("&o" & Mid(nGroup, 7, 2)) + 1, 1)

    'Add the part To OutPut string
    sOut = sOut + pOut

    'Add a new line For Each 76 chars In dest (76*3/4 = 57)
    'If (I + 2) Mod 57 = 0 Then sOut = sOut + vbCrLf
  Next
  Select Case Len(inData) Mod 3
    Case 1: '8 bit final
      sOut = Left(sOut, Len(sOut) - 2) + "=="
    Case 2: '16 bit final
      sOut = Left(sOut, Len(sOut) - 1) + "="
  End Select
  Base64Encode = sOut
End Function

Function MyASC(OneChar)
  If OneChar = "" Then MyASC = 0 Else MyASC = Asc(OneChar)
End Function

Dim xmlobj, username, password
username="myusername"
password="mypassword"
Set xmlobj = server.CreateObject("MSXML2.XMLHTTP.3.0")
xmlobj.Open "GET", sUrl, False
xmlobj.setRequestHeader "Authorization", "Basic " & Base64Encode(username & ":" & password)
xmlobj.Send

Dim xmldoc
If xmlobj.status = 200 Then
  Set xmldoc = Server.CreateObject("MSXML2.DOMDocument.3.0")
  xmldoc.Load xmlobj.ResponseXML
Else
  Response.Write "An error occurred!"
End If
%>

来源：https://stackoverflow.com/questions/28188457/classic-asp-calling-an-api-using-addheader-for-authorization

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asp-classic