fake-smtp/internal/config/config.go

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package config
import (
"io"
"io/ioutil"
"time"
"github.com/caarlos0/env/v6"
"github.com/pkg/errors"
"gopkg.in/yaml.v2"
)
type Config struct {
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HTTP HTTPConfig `yaml:"http"`
SMTP SMTPConfig `yaml:"smtp"`
Data DataConfig `yaml:"data"`
Relay RelayConfig `yaml:"relay"`
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}
type HTTPConfig struct {
Address string `yaml:"address" env:"FAKESMTP_HTTP_ADDRESS"`
TemplateDir string `yaml:"templateDir" env:"FAKESMTP_HTTP_TEMPLATEDIR"`
PublicDir string `yaml:"publicDir" env:"FAKESMTP_HTTP_PUBLICDIR"`
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BaseURL string `yaml:"baseUrl" env:"FAKESMTP_HTTP_BASEURL"`
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}
type SMTPConfig struct {
Address string `yaml:"address" env:"FAKESMTP_SMTP_ADDRESS"`
Username string `yaml:"username" env:"FAKESMTP_SMTP_USERNAME"`
Password string `yaml:"password" env:"FAKESMTP_SMTP_PASSWORD"`
Domain string `yaml:"domain" env:"FAKESMTP_SMTP_DOMAIN"`
ReadTimeout time.Duration `yaml:"readTimeout" env:"FAKESMTP_SMTP_READTIMEOUT"`
WriteTimeout time.Duration `yaml:"writeTimeout" env:"FAKESMTP_SMTP_WRITETIMEOUT"`
MaxMessageBytes int `yaml:"maxMessageBytes" env:"FAKESMTP_SMTP_MAXMESSAGEBYTES"`
MaxRecipients int `yaml:"maxRecipients" env:"FAKESMTP_SMTP_MAXRECIPIENTS"`
AllowInsecureAuth bool `yaml:"allowInsecureAuth" env:"FAKESMTP_SMTP_ALLOWINSECUREAUTH"`
Debug bool `yaml:"debug" env:"FAKESMTP_SMTP_DEBUG"`
}
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type RelayConfig struct {
Enabled bool `yaml:"enabled" env:"FAKESMTP_RELAY_ENABLED"`
Address string `yaml:"address" env:"FAKESMTP_RELAY_ADDRESS"`
Identity string `yaml:"identity" env:"FAKESMTP_RELAY_IDENTITY"`
Username string `yaml:"username" env:"FAKESMTP_RELAY_USERNAME"`
Password string `yaml:"password" env:"FAKESMTP_RELAY_PASSWORD"`
Anonymous bool `yaml:"anonymous" env:"FAKESMTP_RELAY_ANONYMOUS"`
UseTLS bool `yaml:"useTLS" env:"FAKESMTP_RELAY_USE_TLS"`
InsecureSkipVerify bool `yaml:"insecureSkipVerify" env:"FAKESMTP_RELAY_INSECURE_SKIP_VERIFY"`
FromOverride string `yaml:"fromOverride" env:"FAKESMTP_RELAY_FROM_OVERRIDE"`
}
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type DataConfig struct {
Path string `yaml:"path" env:"FAKESMTP_DATA_PATH"`
}
// NewFromFile retrieves the configuration from the given file
func NewFromFile(filepath string) (*Config, error) {
config := NewDefault()
data, err := ioutil.ReadFile(filepath)
if err != nil {
return nil, errors.Wrapf(err, "could not read file '%s'", filepath)
}
if err := yaml.Unmarshal(data, config); err != nil {
return nil, errors.Wrapf(err, "could not unmarshal configuration")
}
return config, nil
}
func WithEnvironment(conf *Config) error {
if err := env.Parse(conf); err != nil {
return err
}
return nil
}
func NewDumpDefault() *Config {
config := NewDefault()
return config
}
func NewDefault() *Config {
return &Config{
HTTP: HTTPConfig{
Address: ":8080",
TemplateDir: "template",
PublicDir: "public",
},
SMTP: SMTPConfig{
Address: ":2525",
Username: "",
Password: "",
Domain: "localhost",
ReadTimeout: 30 * time.Second,
WriteTimeout: 30 * time.Second,
MaxMessageBytes: 1024 * 1024,
MaxRecipients: 50,
AllowInsecureAuth: true,
Debug: true,
},
Data: DataConfig{
Path: "fakesmtp.db",
},
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Relay: RelayConfig{
Enabled: false,
},
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}
}
func Dump(config *Config, w io.Writer) error {
data, err := yaml.Marshal(config)
if err != nil {
return errors.Wrap(err, "could not dump config")
}
if _, err := w.Write(data); err != nil {
return err
}
return nil
}