(VBScript) Get a List of Message IDs in GMail User's Mailbox

Demonstrates how to get a list of message IDs in a GMail mailbox. The "userId" can be either the user's email address or the special value "me" to indicate the authenticated user.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/list

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http")
set http = CreateObject("Chilkat.Http")

http.AuthToken = "ACCESS_TOKEN"

http.Accept = "application/json"

' resp is a Chilkat.HttpResponse
Set resp = http.QuickRequest("GET","https://www.googleapis.com/gmail/v1/users/userId/messages")
If (http.LastMethodSuccess <> 1) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Response Status Code: " & resp.StatusCode)

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set jsonResponse = CreateObject("Chilkat.JsonObject")
success = jsonResponse.Load(resp.BodyStr)
jsonResponse.EmitCompact = 0
outFile.WriteLine(jsonResponse.Emit())

If (resp.StatusCode <> 200) Then
    outFile.WriteLine("Failed.")

    WScript.Quit
End If

' {
'   "messages": [
'     users.messages Resource
'   ],
'   "nextPageToken": string,
'   "resultSizeEstimate": unsigned integer
' }

resultSizeEstimate = jsonResponse.IntOf("resultSizeEstimate")
i = 0
count_i = jsonResponse.SizeOfArray("messages")
Do While i < count_i
    jsonResponse.I = i
    id = jsonResponse.StringOf("messages[i].id")
    threadId = jsonResponse.StringOf("messages[i].threadId")
    i = i + 1
Loop

outFile.Close