add header in AsyncWebServerRequest

[Bernd-git-V]

Hello everyone,

how can I send a header using the following request:
???Header(“Access-Control-Allow-Origin”, “*”);

server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request) {
*server.addMiddleware(setHeaders("Access-Control-Allow-Origin: "));

String json = "{"tempabg":" + String(celsius) + "}";
request->send(200, "application/json", json.c_str());
});

server.addMiddleware(setHeaders("Access-Control-Allow-Origin: *"));
doesn't work.

Who can help me find the mistake?
Thank you very much in advance
Bernd

[mathieucarbou]

HI,
Please take time to have a look in the project, there are many examples, and/or the website before asking questions ;-)

[Bernd-git-V]

Hi Mathieu,
I looked at your CORS examples, but unfortunately I didn't find the solution.