#1 2014-12-04 18:52:38

restneophyte
Member
Registered: 2014-11-18
Posts: 26

Need help accessing a 'mORMot' ReST server hosted externally

On my local machine, I have created a ReST Server and Client (code bewlow). When I run the Server locally, I am able via the Client to retrieve a list of products stored in a mySQL database hosted externally. My end goal is to run (at first as a console) my ReSt Server on a Windows instance hosted by Amazon.

I am able to 'install' and run my 'console' server on the Windows instance. However, for the life of me, I am unable to figure out how to modify the client so that it might access my 'mORMot' server. Any pointers and/or advices would be greatly appreciated.


My ReST Server is defined as follow:

uses
  ...,
  OurReST_Model;

var
  iModel: TSQLModel;
  iHttpServer: TSQLHttpServer;
  iRestServer: TSQLRestServerDB;
  iConnection: TSQLDBConnectionProperties;
begin
  SQLite3Log.Family.Level        := LOG_VERBOSE;
  SQLite3Log.Family.PerThreadLog := ptIdentifiedInOnFile;
  iConnection := TSQLDBZEOSConnectionProperties.Create(TSQLDBZEOSConnectionProperties.URI(dMySQL, c_mySQLDBServer + ':3306'), c_mySQLDB, c_mySQLDBUsername, c_mySQlDBPassword);
  try
    iModel := OurDataModel;
    VirtualTableExternalRegister(iModel, TCustomersProducts, iConnection, 'TableCustomersProducts');
    try
      iRestServer := TSQLRestServerDB.Create(iModel, ':memory:', false);
      try
        iRestServer.CreateMissingTables;
        iHttpServer := TSQLHttpServer.Create(SERVER_PORT, [iRestServer], '+', useHttpApiRegisteringURI);
        try
          writeln('Background server is running.'#10);
          write('Press [Enter] to close the server.');
          readln;
        finally
          iHttpServer.Free;
        end;
      finally
        iRestServer.Free;
      end;
    finally
      iModel.Free;
    end;
  finally
    iConnection.Free;
  end;
end.

'OurReST_Model' is defined as follow:

unit OurReST_Model;

interface

uses
  SynCommons,
  mORMot;

type
  TCustomersProducts = class(TSQLRecord)      // TSQLRecord has a built-in ID: integer primary key
    private
      fProductName: RawUTF8;
      fProductAddedOn: TDateTime;
    published
      /// ORM will create the table columns
      property ProductName: RawUTF8 index 12 read fProductName write fProductName;
      property ProductAddedOn: TDateTime read fProductAddedOn write fProductAddedOn;
  end;

function OurDataModel: TSQLModel;

const
  SERVER_ROOT = 'root';
  SERVER_PORT = '888';

implementation

function OurDataModel: TSQLModel;
begin
  Result := TSQLModel.Create([TCustomersProducts], SERVER_ROOT);
end;

end.

Within my 'client' VCL application, if I want to retrieve a list of products that belongs to a specific customer, I do the following:

function get_UserProducts(aUserID: Integer; var aClientDataSet: TClientDataSet): Boolean;
var
  iModel: TSQLModel;
  iClient: TSQLRestClientHTTP;
  iUserRecord: TCustomersProducts;
begin
  iModel  := GetModel;
  iClient := GetClient('localhost');
  try
    iUserRecord := TCustomersProducts.CreateAndFillPrepare(iClient, '', 'ID = ?', [aUserID]);
    try
      aClientDataSet.Close;
      aClientDataSet.Open;
      while iUserRecord.FillOne do begin
        aClientDataSet.Append;
        aClientDataSet.FieldByName('ProductName').AsString      := iUserRecord.ProductName;
        aClientDataSet.FieldByName('ProductAddedOn').AsDateTime := iUserRecord.ProductAddedOn;
        aClientDataSet.Post;
      end;
      Result := True;
    finally
      iUserRecord.Free;
    end;
  finally
    iClient.Free;
    iModel.Free;
  end;
end;

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#2 2014-12-04 18:59:31

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,713
Website

Re: Need help accessing a 'mORMot' ReST server hosted externally

For a vcl app, just use the same model as the server.
It is not mandatory nor advised to use the cross platform clients here.
Start from one of the supplied samples.

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#3 2014-12-04 21:29:01

restneophyte
Member
Registered: 2014-11-18
Posts: 26

Re: Need help accessing a 'mORMot' ReST server hosted externally

@ab
I am running my 'client' as a VCL application for testing purposes only (it is faster than deploying to my mobile device each time I made a change). At the end, it will be running on a mobile device. That is why I am developing a cross platform client. For my own curiosity, why is not advised to use a cross platform client within a VCL app?

I am not sure if I understand your response in terms of use the same model as the server.

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