9cc0f3157c
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Add a comprehensive guide for developers transitioning from Node/PHP and implement a new middleware to handle IP-based rate limiting with temporary banning functionality. Also refactors configuration loading to use a singleton pattern for better resource management.
90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
package config
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import (
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"os"
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"strconv"
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"strings"
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"sync"
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)
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type Config struct {
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Port string
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DSN string
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Database string
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APIKey string
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AdminKey string
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MaxOpenConns int
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MaxIdleConns int
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ConnMaxLifetime int
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}
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var (
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instance *Config
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once sync.Once
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)
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func Load() *Config {
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once.Do(func() { instance = load() })
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return instance
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}
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func load() *Config {
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port := os.Getenv("PORT")
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if port == "" {
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port = "8080"
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}
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raw := os.Getenv("API_KEY")
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var apiKey string
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for _, k := range strings.Split(raw, ",") {
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k = strings.TrimSpace(k)
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if k != "" {
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apiKey = k
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break
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}
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}
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raw = os.Getenv("ADMIN_KEY")
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var adminKey string
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for _, k := range strings.Split(raw, ",") {
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k = strings.TrimSpace(k)
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if k != "" {
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adminKey = k
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break
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}
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}
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maxOpenConns, err := strconv.Atoi(os.Getenv("DB_MAX_OPEN_CONNS"))
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if err != nil {
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maxOpenConns = 30
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}
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maxIdleConns, err := strconv.Atoi(os.Getenv("DB_MAX_IDLE_CONNS"))
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if err != nil {
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maxIdleConns = 5
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}
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connMaxLifetime, err := strconv.Atoi(os.Getenv("DB_CONN_MAX_LIFETIME"))
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if err != nil {
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connMaxLifetime = 5
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}
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dbName := os.Getenv("DATABASE_NAME")
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if dbName == "" {
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panic("DATABASE_NAME environment variable is required")
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}
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if os.Getenv("DB_DSN") == "" {
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panic("DB_DSN environment variable is required")
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}
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return &Config{
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Port: port,
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DSN: os.Getenv("DB_DSN"),
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Database: dbName,
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APIKey: apiKey,
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AdminKey: adminKey,
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MaxOpenConns: maxOpenConns,
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MaxIdleConns: maxIdleConns,
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ConnMaxLifetime: connMaxLifetime,
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}
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}
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