adding quickfix library

quickfix/dialer.go

@@ -0,0 +1,95 @@
+// Copyright (c) quickfixengine.org  All rights reserved.
+//
+// This file may be distributed under the terms of the quickfixengine.org
+// license as defined by quickfixengine.org and appearing in the file
+// LICENSE included in the packaging of this file.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING
+// THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// See http://www.quickfixengine.org/LICENSE for licensing information.
+//
+// Contact ask@quickfixengine.org if any conditions of this licensing
+// are not clear to you.
+
+package quickfix
+
+import (
+	"fmt"
+	"net"
+	"time"
+
+	"golang.org/x/net/proxy"
+
+	"github.com/quickfixgo/quickfix/config"
+)
+
+func loadDialerConfig(settings *SessionSettings) (dialer proxy.ContextDialer, err error) {
+	stdDialer := &net.Dialer{}
+	if settings.HasSetting(config.SocketTimeout) {
+		timeout, err := settings.DurationSetting(config.SocketTimeout)
+		if err != nil {
+			timeoutInt, err := settings.IntSetting(config.SocketTimeout)
+			if err != nil {
+				return stdDialer, err
+			}
+
+			stdDialer.Timeout = time.Duration(timeoutInt) * time.Second
+		} else {
+			stdDialer.Timeout = timeout
+		}
+	}
+	dialer = stdDialer
+
+	if !settings.HasSetting(config.ProxyType) {
+		return
+	}
+
+	var proxyType string
+	if proxyType, err = settings.Setting(config.ProxyType); err != nil {
+		return
+	}
+
+	switch proxyType {
+	case "socks":
+		var proxyHost string
+		var proxyPort int
+		if proxyHost, err = settings.Setting(config.ProxyHost); err != nil {
+			return
+		} else if proxyPort, err = settings.IntSetting(config.ProxyPort); err != nil {
+			return
+		}
+
+		proxyAuth := new(proxy.Auth)
+		if settings.HasSetting(config.ProxyUser) {
+			if proxyAuth.User, err = settings.Setting(config.ProxyUser); err != nil {
+				return
+			}
+		}
+		if settings.HasSetting(config.ProxyPassword) {
+			if proxyAuth.Password, err = settings.Setting(config.ProxyPassword); err != nil {
+				return
+			}
+		}
+
+		var proxyDialer proxy.Dialer
+
+		proxyDialer, err = proxy.SOCKS5("tcp", fmt.Sprintf("%s:%d", proxyHost, proxyPort), proxyAuth, stdDialer)
+		if err != nil {
+			return
+		}
+
+		if contextDialer, ok := proxyDialer.(proxy.ContextDialer); ok {
+			dialer = contextDialer
+		} else {
+			err = fmt.Errorf("proxy does not support context dialer")
+			return
+		}
+
+	default:
+		err = fmt.Errorf("unsupported proxy type %s", proxyType)
+	}
+
+	return
+}