Move host and port to environment variables

config.example.yml

@@ -1,5 +1,3 @@
-host: 0.0.0.0
-port: 3001
 redis:
   uri: 127.0.0.1:6379
   database: 0

go.mod

@@ -5,6 +5,7 @@ go 1.17
 require (
 	github.com/buaazp/fasthttprouter v0.1.1
 	github.com/go-redis/redis/v8 v8.11.4
+	github.com/joho/godotenv v1.4.0
 	github.com/valyala/fasthttp v1.34.0
 	golang.org/x/image v0.0.0-20220302094943-723b81ca9867
 	gopkg.in/yaml.v2 v2.4.0

go.sum

@@ -29,6 +29,8 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
+github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/klauspost/compress v1.15.0 h1:xqfchp4whNFxn5A4XFyyYtitiWI8Hy5EW59jEwcyL6U=
 github.com/klauspost/compress v1.15.0/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=

src/config.go

@@ -7,8 +7,6 @@ import (
 )
 
 type Configuration struct {
-	Host  string `yaml:"host"`
-	Port  uint16 `yaml:"port"`
 	Redis struct {
 		URI      string `yaml:"uri"`
 		Database int    `yaml:"database"`

src/main.go

@@ -5,13 +5,18 @@ import (
 	"log"
 	"main/src/redis"
 	"main/src/routes"
+	"os"
+	"strconv"
 	"time"
 
 	"github.com/buaazp/fasthttprouter"
+	"github.com/joho/godotenv"
 	"github.com/valyala/fasthttp"
 )
 
 var (
+	host   string         = "127.0.0.1"
+	port   uint16         = 3000
 	config *Configuration = &Configuration{}
 	r      *redis.Redis   = &redis.Redis{}
 )
@@ -19,6 +24,8 @@ var (
 func init() {
 	var err error
 
+	godotenv.Load()
+
 	if err = config.ReadFile("config.yml"); err != nil {
 		log.Fatal(err)
 	}
@@ -31,6 +38,20 @@ func init() {
 
 	log.Printf("Successfully connected to Redis (%s)\n", time.Since(start))
 
+	if value, ok := os.LookupEnv("HOST"); ok {
+		host = value
+	}
+
+	if value, ok := os.LookupEnv("PORT"); ok {
+		parsedValue, err := strconv.ParseUint(value, 10, 16)
+
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		port = uint16(parsedValue)
+	}
+
 	routes.InitRoutes(r)
 }
 
@@ -50,7 +71,7 @@ func main() {
 	router.GET("/body/left/:user", routes.LeftBodyHandler)
 	router.GET("/body/right/:user", routes.RightBodyHandler)
 
-	log.Printf("Listening on %s:%d\n", config.Host, config.Port)
+	log.Printf("Listening on %s:%d\n", host, port)
 
-	log.Fatal(fasthttp.ListenAndServe(fmt.Sprintf("%s:%d", config.Host, config.Port), router.Handler))
+	log.Fatal(fasthttp.ListenAndServe(fmt.Sprintf("%s:%d", host, port), router.Handler))
 }