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https://github.com/danieleteti/delphimvcframework.git
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67 lines
1.8 KiB
ObjectPascal
67 lines
1.8 KiB
ObjectPascal
program topic_messaging_consumer;
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{$APPTYPE CONSOLE}
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{$R *.res}
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uses
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System.SysUtils, MVCFramework.RESTClient, System.JSON,
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Winapi.Windows, MVCFramework.Commons;
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procedure Main;
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var
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LCli: TRESTClient;
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LRes: IRESTResponse;
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LMsg: string;
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LMyClientID: string;
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begin
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{
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USAGE PATTERN
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POST /messages/clients/<myuniqueid>
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POST /messages/subscriptions/topic/<topicname1>
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POST /messages/subscriptions/topic/<topicname2>
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...
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POST /messages/subscriptions/topic/<topicnameN>
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GET /messages (this line can return 200 OK or 408 REQUEST TIMEOUT, however there is always a message body)
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to unsubscribe
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DELETE /messages/subscriptions/topic/<topicname1>
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DELETE /messages/subscriptions/topic/<topicname2>
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...
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DELETE /messages/subscriptions/topic/<topicnameN>
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}
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LMyClientID := 'my-unique-client-id' + GetTickCount.ToString;
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LCli := TRESTClient.Create('localhost', 9999);
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try
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LCli.ReadTimeout(-1);
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LRes := LCli.doPOST('/messages', ['clients', LMyClientID]);
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if LRes.ResponseCode <> HTTP_STATUS.OK then
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WriteLn('Cannot set client id. ' + LRes.ResponseText);
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LRes := LCli.doPOST('/messages/subscriptions/topic', ['topic1']);
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if LRes.ResponseCode <> HTTP_STATUS.OK then
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WriteLn('Cannot subscribe. ' + LRes.ResponseText);
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while True do
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begin
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WriteLn('Waiting on GET /messages');
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LRes := LCli.doGET('/messages', []);
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if LRes.ResponseCode = HTTP_STATUS.RequestTimeout then
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WriteLn('TIMEOUT: ' + LRes.BodyAsString)
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else
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WriteLn(LRes.BodyAsString);
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end;
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finally
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LCli.Free;
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end;
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end;
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begin
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try
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Main;
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except
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on E: Exception do
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WriteLn(E.ClassName, ': ', E.Message);
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end;
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readln;
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end.
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