## Running on Startup { #running-on-startup }

In most cases, when you create a web API, you want it to be **always running**, uninterrupted, so that your clients can always access it. This is of course, unless you have a specific reason why you want it to run only in certain situations, but most of the time you want it constantly running and **available**.

### In a Remote Server { #in-a-remote-server }

		Enable      bool
		NSQDAddress xnet.Host
		Topic       string
		TLS         struct {
			Enable     bool
			SkipVerify bool
		}
	}
	tests := []struct {
		name    string
		fields  fields
		wantErr bool
	}{
		{
			name: "test1_missing_topic",
			fields: fields{
				Enable: true,
				NSQDAddress: xnet.Host{
					Name:      "127.0.0.1",
					Port:      4150,
					IsPortSet: true,
				},

    }

    /**
     * Get the proxy port.
     *
     * @return proxy server port
     */
    public int getPort() {
        return port;
    }

    /**
     * Set the proxy port.
     *
     * @param port proxy server port
     */
    public void setPort(int port) {
        this.port = port;
    }

    /**
     * Get the proxy username.
     *

			}
			if port < 1 || port > 65535 {
				logger.Fatal(fmt.Errorf("invalid arguments passed to --ftp=%s, (port number must be between 1 to 65535)", arg), "unable to start FTP server")
			}
			publicIP = host
		case "passive-port-range":
			portRange = tokens[1]
		case "tls-private-key":
			tlsPrivateKey = tokens[1]
		case "tls-public-cert":
			tlsPublicCert = tokens[1]
		case "force-tls":

			}
		}

		// Add missing port in all endpoints.
		for i := range endpoints {
			if endpoints[i].Host != "" {
				_, port, err := net.SplitHostPort(endpoints[i].Host)
				if err != nil {
					endpoints[i].Host = net.JoinHostPort(endpoints[i].Host, serverAddrPort)
				} else if endpoints[i].IsLocal && serverAddrPort != port {
					// If endpoint is local, but port is different than serverAddrPort, then make it as remote.

If you installed an ASGI server manually, you would normally need to pass an import string in a special format for it to import your FastAPI application:

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 80

<span style="color: green;">INFO</span>:     Uvicorn running on http://0.0.0.0:80 (Press CTRL+C to quit)
```

</div>

/// note

The command `uvicorn main:app` refers to:

const etcdPathSeparator = "/"

// create a new coredns service record for the bucket.
func newCoreDNSMsg(ip string, port string, ttl uint32, t time.Time) ([]byte, error) {
	return json.Marshal(&SrvRecord{
		Host:         ip,
		Port:         json.Number(port),
		TTL:          ttl,
		CreationDate: t,
	})
}

// Close closes the internal etcd client and cannot be used further

package http

import (
	"context"
	"net"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{}

	params := []string{args.ConnectionString}
	if args.ConnectionString == "" {
		params = []string{}
		if !args.Host.IsEmpty() {
			params = append(params, "host="+args.Host.String())
		}
		if args.Port != "" {
			params = append(params, "port="+args.Port)
		}
		if args.Username != "" {
			params = append(params, "username="+args.Username)
		}
		if args.Password != "" {

		{"http://:8080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: empty host name")},
		{"http://server:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},
		{"https://93.184.216.34:808080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: port number must be between 1 to 65535")},