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auth_schema.go
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auth_schema.go
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package auth
import (
"errors"
"fmt"
"github.com/evgeniums/go-backend-helpers/pkg/config"
"github.com/evgeniums/go-backend-helpers/pkg/config/object_config"
"github.com/evgeniums/go-backend-helpers/pkg/logger"
"github.com/evgeniums/go-backend-helpers/pkg/utils"
"github.com/evgeniums/go-backend-helpers/pkg/validator"
)
type Aggregation = string
const AggregationProtocol = "aggregation"
const (
And Aggregation = "and"
Or Aggregation = "or"
)
type AuthSchemaConfig struct {
NAME string `validate:"required"`
AGGREGATION string `default:"and" validate:"omitempty,oneof=and or"`
}
type AuthSchema struct {
AuthHandlerBase
config *AuthSchemaConfig
handlers []AuthHandler
}
func NewAuthSchema() *AuthSchema {
s := &AuthSchema{}
s.Construct()
return s
}
func (s *AuthSchema) Construct() {
s.config = &AuthSchemaConfig{}
s.handlers = make([]AuthHandler, 0)
}
func (a *AuthSchema) Config() interface{} {
return a.config
}
func (a *AuthSchema) Aggregation() Aggregation {
return a.config.AGGREGATION
}
func (a *AuthSchema) SetAggregation(aggregation Aggregation) {
a.config.AGGREGATION = aggregation
}
func (a *AuthSchema) Handlers() []AuthHandler {
return a.handlers
}
func (a *AuthSchema) AppendHandlers(handler ...AuthHandler) {
a.handlers = append(a.handlers, handler...)
}
func (a *AuthSchema) Init(cfg config.Config, log logger.Logger, vld validator.Validator, configPath ...string) error {
return errors.New("use AuthSchema.InitSchema for initialization")
}
func (a *AuthSchema) InitSchema(log logger.Logger, cfg config.Config, vld validator.Validator, handlerStore HandlerStore, configPath ...string) error {
path := utils.OptionalArg("auth_schema", configPath...)
fields := logger.Fields{"path": path}
// load plain configuration
err := object_config.LoadLogValidate(cfg, log, vld, a, path)
if err != nil {
return log.PushFatalStack("failed to load configuration of authorization schema", err, fields)
}
a.SetName(a.config.NAME)
// load handlers
key := object_config.Key(path, "handlers")
handlersSection := cfg.Get(key)
handlers, ok := handlersSection.([]interface{})
if !ok {
err = errors.New("invalid handlers section")
return log.PushFatalStack("failed to load configuration of authorization schema", err, fields)
}
for i := range handlers {
handlerPath := object_config.Key(key, fmt.Sprintf("%d", i))
fields := logger.Fields{"path": handlerPath}
handlerName := cfg.GetString(object_config.Key(handlerPath, "name"))
if handlerName != "" {
fields["handler"] = handlerName
handler, err := handlerStore.Handler(handlerName)
if err != nil {
return log.PushFatalStack("failed to find authorization handler in handlers store", err, fields)
}
a.handlers = append(a.handlers, handler)
} else {
childSchema := &AuthSchema{}
err = childSchema.InitSchema(log, cfg, vld, handlerStore, handlerPath)
if err != nil {
return err
}
a.handlers = append(a.handlers, childSchema)
if childSchema.Name() != "" {
handlerStore.AddHandler(childSchema)
}
}
}
// done
return nil
}
func (a *AuthSchema) Handle(ctx AuthContext) (bool, error) {
// setup
c := ctx.TraceInMethod("AuthSchema.Handle", logger.Fields{"path": ctx.GetRequestPath()})
var err error
onExit := func() {
if err != nil {
c.SetError(err)
}
ctx.TraceOutMethod()
}
defer onExit()
authMethodFound := false
for _, handler := range a.handlers {
c.SetLoggerField("auth_method", handler.Name())
authMethodFound, err = handler.Handle(ctx)
if !authMethodFound {
if a.config.AGGREGATION == Or {
continue
}
ctx.SetGenericErrorCode(ErrorCodeUnauthorized)
if err == nil {
err = errors.New("auth method not found in request")
}
return false, err
}
if err != nil {
ctx.SetGenericErrorCode(ErrorCodeUnauthorized)
return true, err
}
if a.config.AGGREGATION == Or {
return true, nil
}
}
return len(a.handlers) == 0, nil
}
func (a *AuthSchema) Protocol() string {
return AggregationProtocol
}