Xbase++

Search for Files in Google Drive

See more Google Drive Examples

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. Xbase++

LOCAL nSuccess
LOCAL oGAuth
LOCAL oRest
LOCAL nBAutoReconnect
LOCAL oJson
LOCAL i
LOCAL nNumFiles
LOCAL cJsonResponse
LOCAL nPageNumber
LOCAL cPageToken
LOCAL nBContinueLoop
LOCAL nBHasMorePages

nSuccess := 0

nSuccess := 1

//  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.

oGAuth := CreateObject("Chilkat.AuthGoogle")
oGAuth:AccessToken := "GOOGLE-DRIVE-ACCESS-TOKEN"

oRest := CreateObject("Chilkat.Rest")

//  Connect using TLS.
nBAutoReconnect := 1
nSuccess := oRest:Connect("www.googleapis.com", 443, 1, nBAutoReconnect)

//  Provide the authentication credentials (i.e. the access token)
oRest:SetAuthGoogle(oGAuth)

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

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

oJson := CreateObject("Chilkat.JsonObject")

//  Send the request for the 1st page.
cJsonResponse := oRest:FullRequestNoBody("GET", "/drive/v3/files")

nPageNumber := 1

nBContinueLoop := oRest:LastMethodSuccess .AND. (oRest:ResponseStatusCode == 200)

DO WHILE nBContinueLoop == 1

    ? "---- Page " + Str(nPageNumber) + " ----"

    //  Iterate over each file in the response and show the name, id, and mimeType.
    oJson:Load(cJsonResponse)

    nNumFiles := oJson:SizeOfArray("files")
    i := 0
    DO WHILE i < nNumFiles
        oJson:I := i
        ? "name: " + oJson:StringOf("files[i].name")
        ? "id: " + oJson:StringOf("files[i].id")
        ? "mimeType: " + oJson:StringOf("files[i].mimeType")
        ? "-"
        i := i + 1
    ENDDO

    //  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.
    cPageToken := oJson:StringOf("nextPageToken")
    nBContinueLoop := 0
    nBHasMorePages := oJson:LastMethodSuccess
    IF (nBHasMorePages == 1)
        oRest:ClearAllQueryParams()
        oRest:AddQueryParam("pageSize", "5")
        oRest:AddQueryParam("pageToken", cPageToken)
        oRest:AddQueryParam("q", "name contains '.jpg'")

        cJsonResponse := oRest:FullRequestNoBody("GET", "/drive/v3/files")
        nBContinueLoop := oRest:LastMethodSuccess .AND. (oRest:ResponseStatusCode == 200)
        nPageNumber := nPageNumber + 1
    ENDIF

ENDDO

IF (oRest:LastMethodSuccess != 1)
    ? oRest:LastErrorText
    oGAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    RETURN
ENDIF

//  A successful response will have a status code equal to 200.
IF (oRest:ResponseStatusCode != 200)
    ? "response status code = " + Str(oRest:ResponseStatusCode)
    ? "response status text = " + oRest:ResponseStatusText
    ? "response header: " + oRest:ResponseHeader
    ? "response JSON: " + cJsonResponse
    oGAuth:destroy()
    oRest:destroy()
    oJson:destroy()
    RETURN
ENDIF

oGAuth:destroy()
oRest:destroy()
oJson:destroy()