lanyuanxiaoyao
cfb0edf802
引入 Viper 配置管理框架，支持 CLI 参数、环境变量、配置文件和默认值四种配置方式。 主要变更： - 引入 Viper、pflag、validator、mapstructure 依赖 - 实现配置优先级：CLI > ENV > File > Default - 所有 13 个配置项支持 CLI 参数和环境变量 - 规范化命名：server.port → NEX_SERVER_PORT → --server-port - 使用结构体验证器进行配置验证 - 添加配置摘要输出功能 新增能力： - cli-config: 命令行参数配置支持 - env-config: 环境变量配置支持（符合 12-Factor App） - config-priority: 配置优先级管理 修改能力： - config-management: 扩展为多层配置源支持 使用示例： ./server --server-port 9000 --log-level debug export NEX_SERVER_PORT=9000 && ./server ./server --config /path/to/custom.yaml
297 lines
9.4 KiB
Go
297 lines
9.4 KiB
Go
package config
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/go-playground/validator/v10"
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"github.com/mitchellh/mapstructure"
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"github.com/spf13/pflag"
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"github.com/spf13/viper"
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"gopkg.in/yaml.v3"
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appErrors "nex/backend/pkg/errors"
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)
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// Config 应用配置
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type Config struct {
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Server ServerConfig `yaml:"server" mapstructure:"server" validate:"required"`
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Database DatabaseConfig `yaml:"database" mapstructure:"database" validate:"required"`
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Log LogConfig `yaml:"log" mapstructure:"log" validate:"required"`
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}
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// ServerConfig 服务器配置
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type ServerConfig struct {
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Port int `yaml:"port" mapstructure:"port" validate:"required,min=1,max=65535"`
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ReadTimeout time.Duration `yaml:"read_timeout" mapstructure:"read_timeout" validate:"required"`
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WriteTimeout time.Duration `yaml:"write_timeout" mapstructure:"write_timeout" validate:"required"`
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}
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// DatabaseConfig 数据库配置
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type DatabaseConfig struct {
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Path string `yaml:"path" mapstructure:"path" validate:"required"`
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MaxIdleConns int `yaml:"max_idle_conns" mapstructure:"max_idle_conns" validate:"required,min=1"`
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MaxOpenConns int `yaml:"max_open_conns" mapstructure:"max_open_conns" validate:"required,min=1"`
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ConnMaxLifetime time.Duration `yaml:"conn_max_lifetime" mapstructure:"conn_max_lifetime" validate:"required"`
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}
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// LogConfig 日志配置
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type LogConfig struct {
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Level string `yaml:"level" mapstructure:"level" validate:"required,oneof=debug info warn error"`
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Path string `yaml:"path" mapstructure:"path" validate:"required"`
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MaxSize int `yaml:"max_size" mapstructure:"max_size" validate:"required,min=1"`
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MaxBackups int `yaml:"max_backups" mapstructure:"max_backups" validate:"required,min=0"`
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MaxAge int `yaml:"max_age" mapstructure:"max_age" validate:"required,min=0"`
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Compress bool `yaml:"compress" mapstructure:"compress"`
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}
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// DefaultConfig returns default config values
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func DefaultConfig() *Config {
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// Use home dir for default paths
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homeDir, _ := os.UserHomeDir()
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nexDir := filepath.Join(homeDir, ".nex")
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return &Config{
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Server: ServerConfig{
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Port: 9826,
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ReadTimeout: 30 * time.Second,
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WriteTimeout: 30 * time.Second,
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},
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Database: DatabaseConfig{
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Path: filepath.Join(nexDir, "config.db"),
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MaxIdleConns: 10,
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MaxOpenConns: 100,
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ConnMaxLifetime: 1 * time.Hour,
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},
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Log: LogConfig{
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Level: "info",
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Path: filepath.Join(nexDir, "log"),
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MaxSize: 100,
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MaxBackups: 10,
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MaxAge: 30,
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Compress: true,
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},
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}
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}
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// GetConfigDir 获取配置目录路径（~/.nex/）
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func GetConfigDir() (string, error) {
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homeDir, err := os.UserHomeDir()
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if err != nil {
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return "", err
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}
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configDir := filepath.Join(homeDir, ".nex")
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if err := os.MkdirAll(configDir, 0755); err != nil {
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return "", err
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}
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return configDir, nil
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}
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// GetDBPath 获取数据库文件路径
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func GetDBPath() (string, error) {
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configDir, err := GetConfigDir()
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if err != nil {
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return "", err
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}
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return filepath.Join(configDir, "config.db"), nil
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}
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// GetConfigPath 获取配置文件路径
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func GetConfigPath() (string, error) {
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configDir, err := GetConfigDir()
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if err != nil {
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return "", err
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}
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return filepath.Join(configDir, "config.yaml"), nil
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}
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// setupDefaults 设置默认配置值
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func setupDefaults(v *viper.Viper) {
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homeDir, _ := os.UserHomeDir()
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nexDir := filepath.Join(homeDir, ".nex")
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v.SetDefault("server.port", 9826)
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v.SetDefault("server.read_timeout", "30s")
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v.SetDefault("server.write_timeout", "30s")
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v.SetDefault("database.path", filepath.Join(nexDir, "config.db"))
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v.SetDefault("database.max_idle_conns", 10)
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v.SetDefault("database.max_open_conns", 100)
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v.SetDefault("database.conn_max_lifetime", "1h")
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v.SetDefault("log.level", "info")
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v.SetDefault("log.path", filepath.Join(nexDir, "log"))
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v.SetDefault("log.max_size", 100)
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v.SetDefault("log.max_backups", 10)
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v.SetDefault("log.max_age", 30)
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v.SetDefault("log.compress", true)
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}
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// setupFlags 定义和绑定 CLI 参数
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func setupFlags(v *viper.Viper, flagSet *pflag.FlagSet) {
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// 定义所有配置项的 CLI 参数
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// 注意：这里不设置默认值，让 viper 的默认值生效
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flagSet.Int("server-port", 0, "服务器端口")
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flagSet.Duration("server-read-timeout", 0, "读超时")
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flagSet.Duration("server-write-timeout", 0, "写超时")
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flagSet.String("database-path", "", "数据库文件路径")
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flagSet.Int("database-max-idle-conns", 0, "最大空闲连接数")
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flagSet.Int("database-max-open-conns", 0, "最大打开连接数")
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flagSet.Duration("database-conn-max-lifetime", 0, "连接最大生命周期")
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flagSet.String("log-level", "", "日志级别：debug/info/warn/error")
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flagSet.String("log-path", "", "日志文件目录")
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flagSet.Int("log-max-size", 0, "单个日志文件最大大小 MB")
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flagSet.Int("log-max-backups", 0, "保留的旧日志文件最大数量")
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flagSet.Int("log-max-age", 0, "保留旧日志文件的最大天数")
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flagSet.Bool("log-compress", false, "是否压缩旧日志文件")
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// 绑定所有 flag 到 viper
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// 注意：必须在设置默认值之后绑定
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v.BindPFlag("server.port", flagSet.Lookup("server-port"))
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v.BindPFlag("server.read_timeout", flagSet.Lookup("server-read-timeout"))
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v.BindPFlag("server.write_timeout", flagSet.Lookup("server-write-timeout"))
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v.BindPFlag("database.path", flagSet.Lookup("database-path"))
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v.BindPFlag("database.max_idle_conns", flagSet.Lookup("database-max-idle-conns"))
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v.BindPFlag("database.max_open_conns", flagSet.Lookup("database-max-open-conns"))
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v.BindPFlag("database.conn_max_lifetime", flagSet.Lookup("database-conn-max-lifetime"))
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v.BindPFlag("log.level", flagSet.Lookup("log-level"))
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v.BindPFlag("log.path", flagSet.Lookup("log-path"))
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v.BindPFlag("log.max_size", flagSet.Lookup("log-max-size"))
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v.BindPFlag("log.max_backups", flagSet.Lookup("log-max-backups"))
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v.BindPFlag("log.max_age", flagSet.Lookup("log-max-age"))
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v.BindPFlag("log.compress", flagSet.Lookup("log-compress"))
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}
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// setupEnv 绑定环境变量
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func setupEnv(v *viper.Viper) {
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v.SetEnvPrefix("NEX")
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v.AutomaticEnv()
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v.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
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}
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// setupConfigFile 读取配置文件
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func setupConfigFile(v *viper.Viper, configPath string) error {
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v.SetConfigFile(configPath)
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v.SetConfigType("yaml")
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// 尝试读取配置文件，如果不存在则忽略
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if err := v.ReadInConfig(); err != nil {
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if !os.IsNotExist(err) {
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return appErrors.Wrap(appErrors.ErrInternal, err)
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}
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// 配置文件不存在，创建默认配置文件
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if err := v.SafeWriteConfig(); err != nil {
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// 忽略写入错误（可能目录已存在等）
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return nil
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}
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}
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return nil
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}
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// LoadConfig loads config from YAML file, creates default if not exists
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func LoadConfig() (*Config, error) {
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configPath, err := GetConfigPath()
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if err != nil {
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return nil, appErrors.Wrap(appErrors.ErrInternal, err)
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}
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return LoadConfigFromPath(configPath)
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}
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// LoadConfigFromPath 从指定路径加载配置
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func LoadConfigFromPath(configPath string) (*Config, error) {
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// 1. 创建 Viper 实例
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v := viper.New()
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// 2. 定义 CLI 参数
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flagSet := pflag.NewFlagSet("config", pflag.ContinueOnError)
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flagSet.String("config", configPath, "配置文件路径")
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setupFlags(v, flagSet)
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// 3. 解析 CLI 参数（忽略错误，因为可能没有参数）
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flagSet.Parse(os.Args[1:])
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// 4. 获取配置文件路径（可能被 --config 参数覆盖）
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if configPathFlag, err := flagSet.GetString("config"); err == nil && configPathFlag != "" {
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configPath = configPathFlag
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}
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// 5. 设置默认值
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setupDefaults(v)
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// 6. 绑定环境变量
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setupEnv(v)
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// 7. 读取配置文件
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if err := setupConfigFile(v, configPath); err != nil {
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return nil, err
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}
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// 8. 反序列化到结构体
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cfg := &Config{}
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if err := v.Unmarshal(cfg, viper.DecodeHook(mapstructure.ComposeDecodeHookFunc(
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mapstructure.StringToTimeDurationHookFunc(),
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mapstructure.StringToSliceHookFunc(","),
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))); err != nil {
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return nil, appErrors.Wrap(appErrors.ErrInternal, err)
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}
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// 9. 验证配置
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if err := cfg.Validate(); err != nil {
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return nil, err
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}
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return cfg, nil
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}
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// SaveConfig saves config to YAML file
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func SaveConfig(cfg *Config) error {
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configPath, err := GetConfigPath()
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if err != nil {
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return appErrors.Wrap(appErrors.ErrInternal, err)
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}
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data, err := yaml.Marshal(cfg)
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if err != nil {
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return appErrors.Wrap(appErrors.ErrInternal, err)
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}
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// Ensure directory exists
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dir := filepath.Dir(configPath)
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if err := os.MkdirAll(dir, 0755); err != nil {
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return appErrors.Wrap(appErrors.ErrInternal, err)
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}
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return os.WriteFile(configPath, data, 0644)
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}
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// Validate validates the config
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func (c *Config) Validate() error {
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validate := validator.New()
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if err := validate.Struct(c); err != nil {
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return appErrors.WithMessage(appErrors.ErrInvalidRequest, fmt.Sprintf("配置验证失败: %v", err))
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}
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return nil
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}
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// PrintSummary 打印配置摘要
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func (c *Config) PrintSummary() {
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fmt.Println("\nAI Gateway 启动配置")
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fmt.Println("==================")
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fmt.Printf("服务器端口: %d\n", c.Server.Port)
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fmt.Printf("数据库路径: %s\n", c.Database.Path)
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fmt.Printf("日志级别: %s\n", c.Log.Level)
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fmt.Println("\n配置来源:")
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configPath, _ := GetConfigPath()
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fmt.Printf(" 配置文件: %s\n", configPath)
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fmt.Println(" 环境变量: 待统计")
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fmt.Println(" CLI 参数: 待统计")
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fmt.Println()
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}
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