B4J Question Read the real time from any web service

[desof]

Hello,

as I can read from the actual date B4j from some web service?
me or is this line returns the system date

 DateActual = DateTime.Date(DateTime.Now)

But the same could be impaired and need the real time ...

DateActual = date from www ...... ?

It is possible ?

 

[Erel]

You will need to find a web service that returns the time. You can then use HttpUtils2 to call it.

 

[desof]

You will need to find a web service that returns the time. You can then use HttpUtils2 to call it.

Erel Sorry friend but I do not understand your answer.

Some example?

 

[dilettante]

If the jNet library was extended to supported Apache Commons Net NTP classes then something like this would be possible:

How do I query the NIST Internet Time Service using the Network Time Protocol?

Or perhaps it would be possible for somebody to create a separate NTP wrapper based on that Java library. I'm too new at Java and B4J to undertake this myself at this time.

The result would be far lighter in weight than an HTTP web service. NIST doesn't like the high cost of supporting any TCP-based protocol, let alone something as expensive as a web service.

http://tf.nist.gov/tf-cgi/servers.cgi/en-en/

We will continue to support the "TIME" protocol that uses tcp port 37 for the forseeable future. However, this protocol is very expensive in terms of network bandwidth, since it uses the complete tcp machinery to transmit only 32 bits of data. Users are *strongly* encouraged to upgrade to the network time protocol (NTP), which is both more accurate and more robust.

 

[Erel]

See the B4A example here: http://www.b4x.com/android/forum/threads/android-network-tutorial.7001/#content

It should be simple to convert it to B4J. Note that this is an old example. It is better to use AsyncStreams to read the response.

 

[desof]

Actually it's a bit complex.
And if I add a record to my database just before .. and then there is a way to check from the BD to the same time I add?

 

[desof]

ENJOY!!!!


Finally I solved myself looking a little here and a little there

We must create a php being called from code by Job.

Excuse my bad English since I use google translator

ExecuteRemoteQuery(" ",List)

Sub ExecuteRemoteQuery1(Query As String, JobName As String)
    Dim job As HttpJob

    job.Initialize(JobName, Me)
    job.PostString("http://www.xxxxxx.com/date.php", "")
End Sub

Sub JobDone(Job As HttpJob)
    If Job.Success Then
    Dim res As String
    Dim tmpNum As String
    Dim TMP As String
   
        res = Job.GetString 'GetGetString'("UTF8")
        Dim parser As JSONParser
        parser.Initialize(res)
   
        Select Job.JobName

                Case List
                    lbDateActual.Text = Job.GetString
'   
        End Select
   
    Else
        'ToastMessageShow("Error: " & Job.ErrorMessage, True) 
    End If
    Job.Release
End Sub

<?php

// Hora en Buenos Aires (Argentina)
putenv('TZ=America/Argentina/Buenos_Aires');
$hora_argentina = date("H:i:s");

// Segundos transcurridos desde el 01-01-1970
$utc = time();

// Una forma de expresar la fecha
$fecha1 = date("d-m-Y H:i");


echo "
$fecha1
";
?>

Fuentes de aqui >>> http://www.uterra.com/codigo_php/codigo_php.php?ref=fecha_y_hora_con_php

un ejemplo >>> http://www.uterra.com/archcodfuente/demos/id78/fecha_hora.php

 

[dilettante]

Or you can use this. No PHP, ASP, ASP.Net, etc. custom server required:

SNTPClient Class

 

[Sytek]

Here. Hope This helps
Select current_timestamp
Best Regards!