(VB.NET) Search for Files in Google Drive

This example follows the same methodology for listing all files in Google Drive in pages, but applies a search filter. It shows how to apply a query parameter for filtering the file results. See the Google Drive Files list for more optional HTTP parameters.

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Dim success As Boolean = True

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

' This example uses a previously obtained access token having permission for the 
' Google Drive scope.

Dim gAuth As New Chilkat.AuthGoogle
gAuth.AccessToken = "GOOGLE-DRIVE-ACCESS-TOKEN"

Dim rest As New Chilkat.Rest

' Connect using TLS.
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.googleapis.com",443,True,bAutoReconnect)

' Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth)

' Get 5 results per page for testing.  (The default page size is 100, with a max of 1000.
rest.AddQueryParam("pageSize","5")

' Our search filter is to list all files containing ".jpg" (i.e. all JPG image files)
rest.AddQueryParam("q","name contains '.jpg'")

Dim json As New Chilkat.JsonObject
Dim i As Integer
Dim numFiles As Integer

' Send the request for the 1st page.
Dim jsonResponse As String = rest.FullRequestNoBody("GET","/drive/v3/files")

Dim pageNumber As Integer = 1
Dim pageToken As String
Dim bContinueLoop As Boolean = rest.LastMethodSuccess And (rest.ResponseStatusCode = 200)

While bContinueLoop = True

    Debug.WriteLine("---- Page " & pageNumber & " ----")

    ' Iterate over each file in the response and show the name, id, and mimeType.
    json.Load(jsonResponse)

    numFiles = json.SizeOfArray("files")
    i = 0
    While i < numFiles
        json.I = i
        Debug.WriteLine("name: " & json.StringOf("files[i].name"))
        Debug.WriteLine("id: " & json.StringOf("files[i].id"))
        Debug.WriteLine("mimeType: " & json.StringOf("files[i].mimeType"))
        Debug.WriteLine("-")
        i = i + 1
    End While

    ' Get the next page of files.
    ' If the "nextPageToken" is present in the JSON response, then use it in the "pageToken" parameter
    ' for the next request.   If no "nextPageToken" was present, then this was the last page of files.
    pageToken = json.StringOf("nextPageToken")
    bContinueLoop = False
    Dim bHasMorePages As Boolean = json.LastMethodSuccess
    If (bHasMorePages = True) Then
        rest.ClearAllQueryParams()
        rest.AddQueryParam("pageSize","5")
        rest.AddQueryParam("pageToken",pageToken)
        rest.AddQueryParam("q","name contains '.jpg'")

        jsonResponse = rest.FullRequestNoBody("GET","/drive/v3/files")
        bContinueLoop = rest.LastMethodSuccess And (rest.ResponseStatusCode = 200)
        pageNumber = pageNumber + 1
    End If


End While

If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response JSON: " & jsonResponse)
    Exit Sub
End If