server: make the listen port configurable through environment

Deploying to App Engine require the port to be initialized through
environment variable PORT.

3 files changed, 18 insertions, 4 deletions

diff --git a/kbbi.go b/kbbi.go
index c289722..dfc08c8 100644
--- a/kbbi.go
+++ b/kbbi.go
@@ -16,7 +16,8 @@ const (
 	loginURL  = baseURL + "/Account/Login"
 	entriPath = "/entri/"
 
-	defServerAPI    = "https://kilabit.info/project/kbbi"
+	defServerAPI    = "https://kamuskubot.df.r.appspot.com"
+	envPort         = "PORT"
 	pathAPIDefinisi = "/api/definisi"
 
 	attrNameClass = "class"
diff --git a/server.go b/server.go
index e3ed460..ef7f930 100644
--- a/server.go
+++ b/server.go
@@ -49,9 +49,15 @@ type Server struct {
 // storage.
 //
 func NewServer(kamusStorage string) (server *Server, err error) {
+	address := defListen
+	port := os.Getenv(envPort)
+	if len(port) > 0 {
+		address = ":" + port
+	}
+
 	opts := &http.ServerOptions{
-		Root:    defRootDir,
-		Address: defListen,
+		Root:    "",
+		Address: address,
 	}
 
 	if debug.Value > 0 {
diff --git a/telegram_bot.go b/telegram_bot.go
index e88b123..71adb94 100644
--- a/telegram_bot.go
+++ b/telegram_bot.go
@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"fmt"
 	"log"
+	"os"
 	"strings"
 
 	"github.com/shuLhan/share/api/telegram/bot"
@@ -47,12 +48,18 @@ func NewTelegramBot(token, webhookURL string) (tgbot *TelegramBot, err error) {
 		Handler:     tgbot.handleCommandStart,
 	}}
 
+	address := defAddress
+	port := os.Getenv(envPort)
+	if len(port) > 0 {
+		address = ":" + port
+	}
+
 	opts := bot.Options{
 		Token:        token,
 		HandleUpdate: tgbot.handleUpdate,
 		Webhook: &bot.Webhook{
 			URL:           webhookURL,
-			ListenAddress: defAddress,
+			ListenAddress: address,
 		},
 	}