super-graph/serv/config.go

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package serv
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import (
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"fmt"
"os"
"regexp"
"strings"
"time"
"unicode"
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"github.com/gobuffalo/flect"
"github.com/spf13/viper"
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)
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type config struct {
*viper.Viper
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AppName string `mapstructure:"app_name"`
Env string
HostPort string `mapstructure:"host_port"`
Host string
Port string
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HTTPGZip bool `mapstructure:"http_compress"`
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WebUI bool `mapstructure:"web_ui"`
LogLevel string `mapstructure:"log_level"`
EnableTracing bool `mapstructure:"enable_tracing"`
UseAllowList bool `mapstructure:"use_allow_list"`
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Production bool
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WatchAndReload bool `mapstructure:"reload_on_config_change"`
AuthFailBlock bool `mapstructure:"auth_fail_block"`
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SeedFile string `mapstructure:"seed_file"`
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MigrationsPath string `mapstructure:"migrations_path"`
Inflections map[string]string
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Auth configAuth
Auths []configAuth
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DB struct {
Type string
Host string
Port uint16
DBName string
User string
Password string
Schema string
PoolSize int32 `mapstructure:"pool_size"`
MaxRetries int `mapstructure:"max_retries"`
SetUserID bool `mapstructure:"set_user_id"`
PingTimeout time.Duration `mapstructure:"ping_timeout"`
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Vars map[string]string `mapstructure:"variables"`
Blocklist []string
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Tables []configTable
} `mapstructure:"database"`
Actions []configAction
Tables []configTable
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RolesQuery string `mapstructure:"roles_query"`
Roles []configRole
roles map[string]*configRole
abacEnabled bool
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}
type configAuth struct {
Name string
Type string
Cookie string
CredsInHeader bool `mapstructure:"creds_in_header"`
Rails struct {
Version string
SecretKeyBase string `mapstructure:"secret_key_base"`
URL string
Password string
MaxIdle int `mapstructure:"max_idle"`
MaxActive int `mapstructure:"max_active"`
Salt string
SignSalt string `mapstructure:"sign_salt"`
AuthSalt string `mapstructure:"auth_salt"`
}
JWT struct {
Provider string
Secret string
PubKeyFile string `mapstructure:"public_key_file"`
PubKeyType string `mapstructure:"public_key_type"`
}
Header struct {
Name string
Value string
Exists bool
}
}
type configColumn struct {
Name string
Type string
ForeignKey string `mapstructure:"related_to"`
}
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type configTable struct {
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Name string
Table string
Blocklist []string
Remotes []configRemote
Columns []configColumn
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}
type configRemote struct {
Name string
ID string
Path string
URL string
Debug bool
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PassHeaders []string `mapstructure:"pass_headers"`
SetHeaders []struct {
Name string
Value string
} `mapstructure:"set_headers"`
}
type configQuery struct {
Limit int
Filters []string
Columns []string
DisableFunctions bool `mapstructure:"disable_functions"`
Block bool
}
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type configInsert struct {
Filters []string
Columns []string
Presets map[string]string
Block bool
}
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type configUpdate struct {
Filters []string
Columns []string
Presets map[string]string
Block bool
}
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type configDelete struct {
Filters []string
Columns []string
Block bool
}
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type configRoleTable struct {
Name string
Query configQuery
Insert configInsert
Update configUpdate
Delete configDelete
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}
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type configRole struct {
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Name string
Match string
Tables []configRoleTable
tablesMap map[string]*configRoleTable
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}
type configAction struct {
Name string
SQL string
AuthName string `mapstructure:"auth_name"`
}
func newConfig(name string) *viper.Viper {
vi := viper.New()
vi.SetEnvPrefix("SG")
vi.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
vi.AutomaticEnv()
vi.SetConfigName(name)
vi.AddConfigPath(confPath)
vi.AddConfigPath("./config")
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if dir, _ := os.Getwd(); strings.HasSuffix(dir, "/serv") {
vi.AddConfigPath("../config")
}
vi.SetDefault("host_port", "0.0.0.0:8080")
vi.SetDefault("web_ui", false)
vi.SetDefault("enable_tracing", false)
vi.SetDefault("auth_fail_block", "always")
vi.SetDefault("seed_file", "seed.js")
vi.SetDefault("database.type", "postgres")
vi.SetDefault("database.host", "localhost")
vi.SetDefault("database.port", 5432)
vi.SetDefault("database.user", "postgres")
vi.SetDefault("database.schema", "public")
vi.SetDefault("env", "development")
vi.BindEnv("env", "GO_ENV") //nolint: errcheck
vi.BindEnv("HOST", "HOST") //nolint: errcheck
vi.BindEnv("PORT", "PORT") //nolint: errcheck
vi.SetDefault("auth.rails.max_idle", 80)
vi.SetDefault("auth.rails.max_active", 12000)
return vi
}
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func (c *config) Init(vi *viper.Viper) error {
if err := vi.Unmarshal(c); err != nil {
return fmt.Errorf("unable to decode config, %v", err)
}
c.Viper = vi
if len(c.Tables) == 0 {
c.Tables = c.DB.Tables
}
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if c.UseAllowList {
c.Production = true
}
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for k, v := range c.Inflections {
flect.AddPlural(k, v)
}
for i := range c.Tables {
t := c.Tables[i]
t.Name = flect.Pluralize(strings.ToLower(t.Name))
t.Table = flect.Pluralize(strings.ToLower(t.Table))
}
for i := range c.Roles {
r := c.Roles[i]
r.Name = strings.ToLower(r.Name)
}
for k, v := range c.DB.Vars {
c.DB.Vars[k] = sanitize(v)
}
c.RolesQuery = sanitize(c.RolesQuery)
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c.roles = make(map[string]*configRole)
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for i := range c.Roles {
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role := &c.Roles[i]
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if _, ok := c.roles[role.Name]; ok {
errlog.Fatal().Msgf("duplicate role '%s' found", role.Name)
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}
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role.Name = strings.ToLower(role.Name)
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role.Match = sanitize(role.Match)
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role.tablesMap = make(map[string]*configRoleTable)
for n, table := range role.Tables {
role.tablesMap[table.Name] = &role.Tables[n]
}
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c.roles[role.Name] = role
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}
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if _, ok := c.roles["user"]; !ok {
u := configRole{Name: "user"}
c.Roles = append(c.Roles, u)
c.roles["user"] = &u
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}
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if _, ok := c.roles["anon"]; !ok {
logger.Warn().Msg("unauthenticated requests will be blocked. no role 'anon' defined")
c.AuthFailBlock = true
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}
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if len(c.RolesQuery) == 0 {
c.abacEnabled = false
} else {
switch len(c.Roles) {
case 0, 1:
c.abacEnabled = false
case 2:
_, ok1 := c.roles["anon"]
_, ok2 := c.roles["user"]
c.abacEnabled = !(ok1 && ok2)
default:
c.abacEnabled = true
}
}
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c.validate()
return nil
}
func (c *config) validate() {
rm := make(map[string]struct{})
for _, v := range c.Roles {
name := strings.ToLower(v.Name)
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if _, ok := rm[name]; ok {
errlog.Fatal().Msgf("duplicate config for role '%s'", v.Name)
}
rm[name] = struct{}{}
}
tm := make(map[string]struct{})
for _, v := range c.Tables {
name := strings.ToLower(v.Name)
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if _, ok := tm[name]; ok {
errlog.Fatal().Msgf("duplicate config for table '%s'", v.Name)
}
tm[name] = struct{}{}
}
am := make(map[string]struct{})
for _, v := range c.Auths {
name := strings.ToLower(v.Name)
if _, ok := am[name]; ok {
errlog.Fatal().Msgf("duplicate config for auth '%s'", v.Name)
}
am[name] = struct{}{}
}
for _, v := range c.Actions {
if len(v.AuthName) == 0 {
continue
}
authName := strings.ToLower(v.AuthName)
if _, ok := am[authName]; !ok {
errlog.Fatal().Msgf("invalid auth_name for action '%s'", v.Name)
}
}
if len(c.RolesQuery) == 0 {
logger.Warn().Msgf("no 'roles_query' defined.")
}
}
func (c *config) getAliasMap() map[string][]string {
m := make(map[string][]string, len(c.Tables))
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for i := range c.Tables {
t := c.Tables[i]
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if len(t.Table) == 0 || len(t.Columns) != 0 {
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continue
}
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m[t.Table] = append(m[t.Table], t.Name)
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}
return m
}
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func (c *config) isABACEnabled() bool {
return c.abacEnabled
}
func (c *config) isAnonRoleDefined() bool {
_, ok := c.roles["anon"]
return ok
}
var varRe1 = regexp.MustCompile(`(?mi)\$([a-zA-Z0-9_.]+)`)
var varRe2 = regexp.MustCompile(`\{\{([a-zA-Z0-9_.]+)\}\}`)
func sanitize(s string) string {
s0 := varRe1.ReplaceAllString(s, `{{$1}}`)
s1 := strings.Map(func(r rune) rune {
if unicode.IsSpace(r) {
return ' '
}
return r
}, s0)
return varRe2.ReplaceAllStringFunc(s1, func(m string) string {
return strings.ToLower(m)
})
}
func getConfigName() string {
if len(os.Getenv("GO_ENV")) == 0 {
return "dev"
}
ge := strings.ToLower(os.Getenv("GO_ENV"))
switch {
case strings.HasPrefix(ge, "pro"):
return "prod"
case strings.HasPrefix(ge, "sta"):
return "stage"
case strings.HasPrefix(ge, "tes"):
return "test"
case strings.HasPrefix(ge, "dev"):
return "dev"
}
return ge
}
func isDev() bool {
return strings.HasPrefix(os.Getenv("GO_ENV"), "dev")
}