On Mon, 7 Nov 2022, duilio foschi wrote:
I fixed the code in Lazarus and got a client based on BufDataClient that successfully talks with a restbridge server. As a next step, I'd like to connect to the same server from a TWebForm of TMS Web Core library.
Normally, TMS Web Core contains a dataset component that handles SQLDBRest connections?. I wrote it myself for them.
I started with a slow step. There is only a TWebHttpRequest in the form (which has the same functions of a TFPHTTPClient) and it issues a GET to URL http://localhost:3000/metadata/?fmt=json&humanreadable=0 This command works ok in the windows client. Here, I get the errors shown in pic https://i.ibb.co/dpsjfQQ/1.jpg The message (a CORS error) is attached below.
Aaaahhh... Welcome to CORS hell... :/
Weird enough, the message is there even after changing the server code in this way: original code: FDisp.DispatchOptions:=FDisp.DispatchOptions+[rdoCustomView,rdoHandleCORS]; new code FDisp.DispatchOptions:=FDisp.DispatchOptions+[rdoCustomView];
This is the exact opposite of what you should do. The rdoHandleCORS option must be there, or CORS will not be handled at all.
Is there a way to tell the server to ignore CORS errors?
The CORS errors are from the browser, not from the server.
Or there a way to sweet-talk the server to accept the requests from a TMS Web form? :)
Yes, you must add localhost as an allowed origin in CORSAllowedOrigins. FDisp.CORSAllowedOrigins:='localhost:3000' If you are not using authentication, as an alternative, you can try FDisp.CORSAllowedOrigins:='*' Michael. -- _______________________________________________ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
