RTC Forums

Danijel,

Trying to understand an array concept on the server side and was hoping you could point me in the right direction.

Let's say I have a javascript function that returns, amongst other things, a JSON array of values using a POST (not a GET), so values will be in the body not the header.

Ex: CompanyName = ACME    <--- Simple/single value followed by
     Employees[ "Mike", "Suzan", "Danijel", "Richard" ]    <--- array

Body example/source form data:
CompanyName=ACME&Employees%5B%5D=Mike&Employees%5B%5D=Suzan&Employees%5B%5D=Danijel&Employees%5B%5D=Richard

How do I get it back on the server side using a TrtcDataProvider.OnDataReceived event? How can I iterate though the elements of the employees array?

procedure TCompanyDM.RtcDataProvider_GetEmployeesOnDataReceived( Sender: TRtcConnection );
var
  Srv:TRtcDataServer absolute Sender;
  EmployeeIndex: Integer;
  CompanyName: String;
begin
  if Srv.Request.Complete then
  begin
      Srv.Request.Params.AddText( Srv.Read );

     CompanyName := Srv.Request.Params[ 'CompanyName ' ] ;  // This I get Ok, I get this value

     Srv.Request.Params[ 'Employees' ] ; // <--- However, this I don't, how do I get this array, how do I read it's properties/elements? Seems to be empty.

     for EmployeeIndex := 0 to ??? do
     begin
        ???     
     end;

      // Do something with it

      Srv.Response.Status( 200, 'Successfull' );
      Srv.Response.ContentType := 'application/javascript';
  end;
end;

Perhaps I am going about it the wrong way, please include sample code if possible.

Thanks in advance,
Richard

The format of your data seem a little odd.  You essentially have an array in the post body named Employees[], with the values Mike, Suzan, Danijel, and Richard.

Nonetheless, you could try using the .Element and .ElementCount methods.

Count := Request.Params.ElementCount['ElementName']
value := Request.Params.Element['ElementName', ndx];

Thanks for the tip Kevin, however, using your sample code, the elementcount is always zero.

As for the array looking a bit odd, isn't it the recommended way of posting array as described here?
http://api.jquery.com/jquery.post/

See:
Example: Pass arrays of data to the server (while still ignoring the return results).
$.post("test.php", { 'choices[]': ["Jon", "Susan"] });

In your original post you show the contents of the POST body.  Where did you get that?  Is that from Request.Params.Text?  If not, please post the values from Request.Params.Text

Kevin would you be king enough to have a look at this example I have prepared:

http://jsfiddle.net/Yx6N7/1/

Follow the instruction at the top, you'll see how I came up with this structure.

Kind Regards,
Richard

I still think you should post exactly what is received by RTC.  Please post results of Request.Params.Text so that you can see exactly with what you are dealing.

Here is my Srv.Request.Params.Text:
(The reference to "Employees" was just as an example, I am actually dealing with a "Taxes" array:


AccountID=12&Amount=100&Date=2013-05-28&Taxes%5B%5D=18&Taxes%5B%5D=19&Desc=asdaad&SessionID=2602CC5A9E894DFEA92B13601627DEEA

Perhaps the issue is that the data is still URL Encoded.  The %5B and %5D are brackets "[]".  Have you tried the URL_Decode() function on the data prior to processing?

To expand on my original code, including the URL_Decode() function;

Kevin, you hit the nail on the head!

That's what's going on, I have tried adding URL_Decode and now it all works.

In summary, your 2 part answer solved it:

1. Needed a URL_Decode and
2. Needed the loop mentioned above to iterate through the elements.

Can't thank you enough for taking the time to help me with this.

Kind Regards,
Richard

Good news.  Glad I could help.

Cheers,

Kevin