(SQL Server) 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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @http int
    -- Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @http, 'AuthToken', 'ACCESS_TOKEN'

    EXEC sp_OASetProperty @http, 'Accept', 'application/json'

    DECLARE @resp int
    EXEC sp_OAMethod @http, 'QuickRequest', @resp OUT, 'GET', 'https://www.googleapis.com/gmail/v1/users/userId/messages'
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @http
        RETURN
      END


    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    PRINT 'Response Status Code: ' + @iTmp0

    DECLARE @jsonResponse int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @jsonResponse OUT

    DECLARE @success int
    EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
    EXEC sp_OAMethod @jsonResponse, 'Load', @success OUT, @sTmp0
    EXEC sp_OASetProperty @jsonResponse, 'EmitCompact', 0
    EXEC sp_OAMethod @jsonResponse, 'Emit', @sTmp0 OUT
    PRINT @sTmp0

    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @resp

        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @jsonResponse
        RETURN
      END

    EXEC @hr = sp_OADestroy @resp

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

    DECLARE @id nvarchar(4000)

    DECLARE @threadId nvarchar(4000)

    DECLARE @resultSizeEstimate int
    EXEC sp_OAMethod @jsonResponse, 'IntOf', @resultSizeEstimate OUT, 'resultSizeEstimate'
    DECLARE @i int
    SELECT @i = 0
    DECLARE @count_i int
    EXEC sp_OAMethod @jsonResponse, 'SizeOfArray', @count_i OUT, 'messages'
    WHILE @i < @count_i
      BEGIN
        EXEC sp_OASetProperty @jsonResponse, 'I', @i
        EXEC sp_OAMethod @jsonResponse, 'StringOf', @id OUT, 'messages[i].id'
        EXEC sp_OAMethod @jsonResponse, 'StringOf', @threadId OUT, 'messages[i].threadId'
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @jsonResponse


END
GO