(Xojo Plugin) 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 Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim http As New Chilkat.Http

http.AuthToken = "ACCESS_TOKEN"

http.Accept = "application/json"

Dim resp As Chilkat.HttpResponse
resp = http.QuickRequest("GET","https://www.googleapis.com/gmail/v1/users/userId/messages")
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("Response Status Code: " + Str(resp.StatusCode))

Dim jsonResponse As New Chilkat.JsonObject
Dim success As Boolean
success = jsonResponse.Load(resp.BodyStr)
jsonResponse.EmitCompact = False
System.DebugLog(jsonResponse.Emit())

If (resp.StatusCode <> 200) Then
    System.DebugLog("Failed.")

    Return
End If

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

Dim id As String
Dim threadId As String

Dim resultSizeEstimate As Int32
resultSizeEstimate = jsonResponse.IntOf("resultSizeEstimate")
Dim i As Int32
i = 0
Dim count_i As Int32
count_i = jsonResponse.SizeOfArray("messages")
While i < count_i
    jsonResponse.I = i
    id = jsonResponse.StringOf("messages[i].id")
    threadId = jsonResponse.StringOf("messages[i].threadId")
    i = i + 1
Wend