Hey, I'm making a custom http handler. The idea is, the user connects to this handler, and this handler connect to another server to fetch some information. Therefore the handler itself can't return the http response. The code framework is as below:

ngx_http_my_custom_handler (ngx_http_request * r) {
//create a peer connection to another peer
...
ngx_event_peer_connect(peer);
peer.connection->write->handler = ngx_http_my_send;
peer.connection->read->handler = ngx_http_my_recv;
...
return ????;
}

ngx_http_my_send {
//send the request to another peer
}

ngx_http_my_recv {
//read the response to buffer
//create response to client
ngx_http_finalize_request(r, NGX_HTTP_OK);
}

The question is what should I return in "ngx_http_my_custom_handler" to avoid the request and the connection being disposed? And how to send back the final response in "ngx_http_my_recv? (is directly using ngx_http_finalize_request correct?) I check the code of ngx_http_proxy_module, and it returns NGX_DONE. But it seems not work in my project. The request is always disposed when NGX_DONE is returned.

Thanks.