program demoloadstreamfromurl; {$mode objfpc} uses browserconsole, Classes; Var SS,SS2,SS3 : TStringStream; begin Writeln('Loading synchronously'); SS:=TStringStream.Create(''); try SS.LoadFromFile('bytes.txt'); Writeln('Loaded : ',SS.DataString); finally SS.Free; end; Writeln('Loading asynchronously'); SS2:=TStringStream.Create(''); SS2.LoadFromURL('bytes.txt',True,procedure(Sender: tobject) begin Writeln('Loaded 2: ',SS2.DataString); end ); Writeln('Loading non-existing file'); SS3:=TStringStream.Create(''); SS3.LoadFromURL('bytesnonexist.txt',True,procedure(Sender: tobject) begin Writeln('Loaded 3: ',SS3.DataString); end , procedure(Sender: tobject; Const aError : string) begin Writeln('Load error: ',aError); end ); end.