/
config.go
115 lines (90 loc) · 1.98 KB
/
config.go
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package application
import (
"fmt"
"net"
)
type Config struct {
DataPath string
GRPC GRPCConfig
HTTP HTTPConfig
}
type GRPCConfig struct {
Enable bool
Port uint16
ListenOnAllInterfaces bool
}
type HTTPConfig struct {
Enable bool
Port uint16
PublicPath string
ListenOnAllInterfaces bool
}
type ServerListeners struct {
GRPC struct {
Listeners []net.Listener
}
HTTP struct {
Listeners []net.Listener
}
}
func (c Config) Listen() (ServerListeners, error) {
listeners := &ServerListeners{}
if c.HTTP.Enable {
lis, err := openListeners(c.HTTP.ListenOnAllInterfaces, c.HTTP.Port)
if err != nil {
return *listeners, fmt.Errorf("open HTTP listeners: %w", err)
}
listeners.HTTP.Listeners = lis
}
if c.GRPC.Enable {
lis, err := openListeners(c.GRPC.ListenOnAllInterfaces, c.GRPC.Port)
if err != nil {
return *listeners, fmt.Errorf("open GRPC listeners: %w", err)
}
listeners.GRPC.Listeners = lis
}
return *listeners, nil
}
func openListeners(listenOnAllInterfaces bool, port uint16) ([]net.Listener, error) {
var addrs []string
if listenOnAllInterfaces {
ipAddrs, err := getAddrs()
if err != nil {
return nil, fmt.Errorf("get addresses of machine interfaces: %w", err)
}
for _, ip := range ipAddrs {
addrs = append(addrs, fmt.Sprintf("%s:%d", ip.String(), port))
}
} else {
addrs = []string{fmt.Sprintf(":%d", port)}
}
var listeners []net.Listener
for _, addr := range addrs {
ln, err := net.Listen("tcp", addr)
if err != nil {
return nil, fmt.Errorf("listen on %s: %w", addr, err)
}
listeners = append(listeners, ln)
}
return listeners, nil
}
func getAddrs() ([]net.IP, error) {
allAddrs, err := net.InterfaceAddrs()
if err != nil {
return nil, err
}
var addrs []net.IP
for _, addr := range allAddrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
if ipv4 := ip.To4(); ipv4 != nil {
addrs = append(addrs, ipv4)
}
}
return addrs, nil
}