Refactor network to a top-level module

network/init.go

@@ -0,0 +1,32 @@
+package network
+
+import (
+	"context"
+	"errors"
+	"net"
+	"time"
+)
+
+const (
+	DefaultTimeout     = 10 * time.Second
+	DefaultIdleTimeout = time.Minute
+	DefaultHTTPTimeout = 10 * time.Second
+	DefaultBufferSize  = 4096
+
+	ProxyDialerOpenThreshold        = 5
+	ProxyDialerHalfOpenTimeout      = time.Minute
+	ProxyDialerResetFailuresTimeout = 10 * time.Second
+
+	DefaultDOHHostname = "9.9.9.9"
+	DNSTimeout         = 5 * time.Second
+)
+
+var (
+	ErrCircuitBreakerOpened     = errors.New("circuit breaker is opened")
+	ErrCannotDialWithAllProxies = errors.New("cannot dial with all proxies")
+)
+
+type Dialer interface {
+	Dial(network, address string) (net.Conn, error)
+	DialContext(ctx context.Context, network, address string) (net.Conn, error)
+}