cloudflared-mirror/tunnelrpc/pogs/json.go

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2019-08-05 22:40:22 +00:00
package pogs
import (
"encoding/json"
"fmt"
"github.com/mitchellh/mapstructure"
2019-08-05 22:40:22 +00:00
"github.com/pkg/errors"
)
// ScopeUnmarshaler can marshal a Scope pog from JSON.
type ScopeUnmarshaler struct {
Scope Scope
}
// UnmarshalJSON takes in a JSON string, and attempts to marshal it into a Scope.
// If successful, the Scope member of this ScopeUnmarshaler is set and nil is returned.
// If unsuccessful, returns an error.
func (su *ScopeUnmarshaler) UnmarshalJSON(b []byte) error {
var scopeJSON map[string]interface{}
if err := json.Unmarshal(b, &scopeJSON); err != nil {
return errors.Wrapf(err, "cannot unmarshal %s into scopeJSON", string(b))
}
if group, ok := scopeJSON["group"]; ok {
if val, ok := group.(string); ok {
su.Scope = NewGroup(val)
return nil
}
return fmt.Errorf("JSON should have been a Scope, but the 'group' key contained %v", group)
}
if systemName, ok := scopeJSON["system_name"]; ok {
if val, ok := systemName.(string); ok {
su.Scope = NewSystemName(val)
return nil
}
return fmt.Errorf("JSON should have been a Scope, but the 'system_name' key contained %v", systemName)
}
return fmt.Errorf("JSON should have been an object with one root key, either 'system_name' or 'group'")
}
// OriginConfigJSONHandler is a wrapper to serialize OriginConfig with type information, and deserialize JSON
// into an OriginConfig.
type OriginConfigJSONHandler struct {
OriginConfig OriginConfig
}
func (ocjh *OriginConfigJSONHandler) MarshalJSON() ([]byte, error) {
marshaler := make(map[string]OriginConfig, 1)
marshaler[ocjh.OriginConfig.jsonType()] = ocjh.OriginConfig
return json.Marshal(marshaler)
}
func (ocjh *OriginConfigJSONHandler) UnmarshalJSON(b []byte) error {
var originJSON map[string]interface{}
if err := json.Unmarshal(b, &originJSON); err != nil {
return errors.Wrapf(err, "cannot unmarshal %s into originJSON", string(b))
}
if originConfig, ok := originJSON[httpType.String()]; ok {
httpOriginConfig := &HTTPOriginConfig{}
if err := mapstructure.Decode(originConfig, httpOriginConfig); err != nil {
return errors.Wrapf(err, "cannot decode %+v into HTTPOriginConfig", originConfig)
}
ocjh.OriginConfig = httpOriginConfig
return nil
}
if originConfig, ok := originJSON[wsType.String()]; ok {
wsOriginConfig := &WebSocketOriginConfig{}
if err := mapstructure.Decode(originConfig, wsOriginConfig); err != nil {
return errors.Wrapf(err, "cannot decode %+v into WebSocketOriginConfig", originConfig)
}
ocjh.OriginConfig = wsOriginConfig
return nil
}
if originConfig, ok := originJSON[helloWorldType.String()]; ok {
helloWorldOriginConfig := &HelloWorldOriginConfig{}
if err := mapstructure.Decode(originConfig, helloWorldOriginConfig); err != nil {
return errors.Wrapf(err, "cannot decode %+v into HelloWorldOriginConfig", originConfig)
}
ocjh.OriginConfig = helloWorldOriginConfig
return nil
}
return fmt.Errorf("cannot unmarshal %s into OriginConfig", string(b))
}
// FallibleConfigMarshaler is a wrapper for FallibleConfig to implement custom marshal logic
type FallibleConfigMarshaler struct {
FallibleConfig FallibleConfig
}
func (fcm *FallibleConfigMarshaler) MarshalJSON() ([]byte, error) {
marshaler := make(map[string]FallibleConfig, 1)
marshaler[fcm.FallibleConfig.jsonType()] = fcm.FallibleConfig
return json.Marshal(marshaler)
}