Vfrdtyky

Yesterday everything was worked as expected in my Go application. I didn't change anything related to firewalls/configurations. Today when I'm trying to send a request to "https://fcm.googleapis.com/fcm/send" I got the next errors:

Post https://fcm.googleapis.com/fcm/send: dial tcp: lookup
fcm.googleapis.com on IP:53: read udp IP:37987->IP:53: i/o timeout

I don't know how this error happen. Firewall configuration still the same. The weird is that If I test locally then it works fine but when I upload to my server I got that error.

NGINX Configuration under Plesk:

server_name mydomain.com;



location /api/v1 {



    proxy_set_header        Host $host;

    proxy_set_header        X-Real-IP $remote_addr;

    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_set_header        X-Forwarded-Proto $scheme;



    fastcgi_read_timeout 2500;

    proxy_connect_timeout      2500;

    proxy_send_timeout         2500;

    proxy_read_timeout         2500;

    send_timeout               2500;

    proxy_pass          http://localhost:8082/api/v1;

}

UPDATE
Checking the logs I got this from NGINX

499 POST /api/v1/notifications HTTP/1.1

My domain doesnt have a SSL Certificate, can this be the cause of timeout?

UPDATE Code:

client, err := fcm.NewClient("KEY")

    if err != nil {

        fmt.Println(err)

    }



    handler.FirebaseClient = client

firebaseNotification := &fcm.Message{

        Notification: &fcm.Notification{

            Title: notificationData.Title,

            Body:  notificationData.Body,

        },

    }

firebaseNotification.RegistrationIDs = notificationData.Tokens



        fmt.Println(firebaseNotification)

        _, err := FirebaseClient.Send(firebaseNotification)

if err != nil {

            fmt.Println(err)

            return

        }

Send function from the library github.com/appleboy/go-fcm

func (c *Client) send(data byte) (*Response, error) {

    // create request

    req, err := http.NewRequest("POST", c.endpoint, bytes.NewBuffer(data))

    if err != nil {

        return nil, err

    }



    // add headers

    req.Header.Add("Authorization", fmt.Sprintf("key=%s", c.apiKey))

    req.Header.Add("Content-Type", "application/json")



    // execute request

    resp, err := c.client.Do(req)

    if err != nil {

        return nil, connectionError(err.Error())

    }

    defer resp.Body.Close()



    // check response status

    if resp.StatusCode != http.StatusOK {

        if resp.StatusCode >= http.StatusInternalServerError {

            return nil, serverError(fmt.Sprintf("%d error: %s", resp.StatusCode, resp.Status))

        }

        return nil, fmt.Errorf("%d error: %s", resp.StatusCode, resp.Status)

    }



    // build return

    response := new(Response)

    if err := json.NewDecoder(resp.Body).Decode(response); err != nil {

        return nil, err

    }



    return response, nil

}