Load Local Environment

src/api/go.mod

@@ -0,0 +1,8 @@
+module api
+
+go 1.19
+
+require (
+	github.com/go-sql-driver/mysql v1.6.0
+	github.com/joho/godotenv v1.4.0
+)

src/api/go.sum

@@ -0,0 +1,4 @@
+github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
+github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
+github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=

src/api/helper/10_ConnectDB.go

@@ -0,0 +1,18 @@
+package helper
+
+import (
+	"database/sql"
+	"fmt"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+// docker run --name mysqldb -e MYSQL_ROOT_PASSWORD=rootpw -p 3307:3306 -d mysql:latest
+func ConnectDB() {
+	db_string := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s", Db_User, Db_Pass, Db_Host, Db_Port, Db_Default_Db)
+	Db, err := sql.Open("mysql", db_string)
+	if err != nil {
+		LogErrorFatal(err)
+	}
+	defer Db.Close()
+}

src/api/helper/10_LoadEnv.go

@@ -0,0 +1,42 @@
+package helper
+
+import (
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+)
+
+func Loadenv() {
+	GetConfigFile()
+	err := godotenv.Load()
+	LogErrorWarning(err)
+}
+
+func GetConfigFile() {
+	dotenv_exists := FileExists(".env")
+	if dotenv_exists {
+		godotenv.Load(".env")
+		LogInfo(".env file found, using prefered values")
+	} else {
+		LogInfo("No .env file found, using default values")
+	}
+	GetDefaults()
+}
+
+func Set_logfile() {
+	f, err := os.OpenFile(Log_file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatalf("error opening file: %v", err)
+	}
+	defer f.Close()
+	log.SetOutput(f)
+}
+
+func FileExists(filename string) bool {
+	info, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return false
+	}
+	return !info.IsDir()
+}

src/api/helper/20_CheckError.go

@@ -0,0 +1,21 @@
+package helper
+
+import "log"
+
+func LogErrorWarning(err error) {
+	if err != nil {
+		log.Printf("WARNING: %v \n", err)
+	}
+}
+
+func LogErrorFatal(err error) {
+	if err != nil {
+		log.Fatalf("ERROR: %v \n", err)
+	}
+}
+
+func LogInfo(info string) {
+	if info != "" {
+		log.Printf("INFO: %v \n", info)
+	}
+}

src/api/helper/20_GetDefaults.go

@@ -0,0 +1,72 @@
+package helper
+
+import "os"
+
+func GetDefaults() {
+	// Gin Variables
+	// Set IP
+	env_ip, present := os.LookupEnv("LISTEN_IP")
+	if present {
+		Ip = env_ip
+	} else {
+		Ip = default_ip
+	}
+	// Set Port
+	env_port, present := os.LookupEnv("LISTEN_PORT")
+	if present {
+		Http_port = env_port
+	} else {
+		Http_port = default_port
+	}
+	// Log Variables
+	// Set Logfile
+	env_log_file, present := os.LookupEnv("LOG_FILE")
+	if present {
+		Log_file = env_log_file
+	} else {
+		Log_file = default_log_file
+	}
+	// Set Gin log file
+	env_gin_log_file, present := os.LookupEnv("GIN_LOG_FILE")
+	if present {
+		Gin_log_file = env_gin_log_file
+	} else {
+		Gin_log_file = default_gin_log_file
+	}
+	// DB Variables
+	// Set DB User
+	env_db_user, present := os.LookupEnv("DB_USER")
+	if present {
+		Db_User = env_db_user
+	} else {
+		Db_User = default_DB_User
+	}
+	// Set DB Password
+	env_db_pass, present := os.LookupEnv("DB_PASSWORD")
+	if present {
+		Db_Pass = env_db_pass
+	} else {
+		Db_Pass = default_DB_Pass
+	}
+	// Set DB Port
+	env_db_port, present := os.LookupEnv("DB_PORT")
+	if present {
+		Db_Port = env_db_port
+	} else {
+		Db_Port = default_DB_Port
+	}
+	// Set DB Host
+	env_db_host, present := os.LookupEnv("DB_HOST")
+	if present {
+		Db_Host = env_db_host
+	} else {
+		Db_Host = default_DB_Host
+	}
+	// Set DB Default Database
+	env_db_default_db, present := os.LookupEnv("DB_DEFAULT_DATABASE")
+	if present {
+		Db_Default_Db = env_db_default_db
+	} else {
+		Db_Default_Db = default_DB_Default_db
+	}
+}

src/api/helper/90_vars.go

@@ -0,0 +1,5 @@
+package helper
+
+import "database/sql"
+
+var Db *sql.DB

src/api/helper/91_default_vars.go

@@ -0,0 +1,33 @@
+package helper
+
+// Default Vars
+// --- Default Gin Vars ---
+var default_port string = "8081"
+var default_ip string = "0.0.0.0"
+
+// --- Default Log Vars ---
+var default_log_file string = "/var/log/gonodeinfo.log"
+var default_gin_log_file string = "/var/log/gonodeinfo.gin.log"
+
+// --- Default DB Vars ---
+var default_DB_User string = "root"
+var default_DB_Pass string = "rootpw"
+var default_DB_Host string = "127.0.0.1"
+var default_DB_Port string = "3307"
+var default_DB_Default_db string = "sys"
+
+// Vars
+// --- Gin Vars ---
+var Http_port string
+var Ip string
+
+// --- Log Vars ---
+var Log_file string
+var Gin_log_file string
+
+// --- DB Vars ---
+var Db_User string
+var Db_Pass string
+var Db_Host string
+var Db_Port string
+var Db_Default_Db string

src/api/main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	helper "api/helper"
+)
+
+func main() {
+	helper.Loadenv()
+}

src/api/test/main.go

@@ -0,0 +1,5 @@
+package main
+
+func main() {
+	Test()
+}

src/api/test/test.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func Test() {
+	fmt.Println("test")
+}