From 9013abc73d0f2a7e944deb84ccfce9c1ef736289 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A4=D0=B0=D1=81=D0=B8=D1=85=D0=BE=D0=B2=20=D0=98=D1=80?=
 =?UTF-8?q?=D0=B5=D0=BA=20=D0=9D=D1=83=D1=80=D0=B3=D0=B0=D1=8F=D0=B7=D0=BE?=
 =?UTF-8?q?=D0=B2=D0=B8=D1=87?= <infas@bank-hlynov.ru>
Date: Wed, 18 Apr 2018 10:32:48 +0300
Subject: [PATCH] added support for socks5

---
 bot.go | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/bot.go b/bot.go
index 8fb6200..da02a10 100644
--- a/bot.go
+++ b/bot.go
@@ -18,6 +18,7 @@ import (
 	"time"
 
 	"github.com/technoweenie/multipartstreamer"
+	"golang.org/x/net/proxy"
 )
 
 // BotAPI allows you to interact with the Telegram Bot API.
@@ -34,7 +35,24 @@ type BotAPI struct {
 //
 // It requires a token, provided by @BotFather on Telegram.
 func NewBotAPI(token string) (*BotAPI, error) {
-	return NewBotAPIWithClient(token, &http.Client{})
+	socks5 := os.Getenv("SOCKS5_PROXY")
+	client := &http.Client{}
+	if len(socks5) > 0 {
+		tgProxyURL, err := url.Parse(socks5)
+		if err != nil {
+			log.Printf("Failed to parse proxy URL:%s\n", err)
+			return nil, err
+		}
+		tgDialer, err := proxy.FromURL(tgProxyURL, proxy.Direct)
+		if err != nil {
+			log.Printf("Failed to obtain proxy dialer: %s\n", err)
+		}
+		tgTransport := &http.Transport{
+			Dial: tgDialer.Dial,
+		}
+		client.Transport = tgTransport
+	}
+	return NewBotAPIWithClient(token, client)
 }
 
 // NewBotAPIWithClient creates a new BotAPI instance