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apiset.go
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apiset.go
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// Copyright (c) 2020 Moriyoshi Koizumi
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
package main
import (
"net/http"
"reflect"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/rs/zerolog/log"
)
type APISet struct {
Version string
Namespace string
handlers map[string]Handler
}
type HandlerFunc func(*aws.Request) (*aws.Response, error)
type UnmarshalParamsFunc func(interface{}, *http.Request) error
type Handler interface {
Name() string
UnmarshalParams(req *http.Request) (interface{}, error)
Handle(*aws.Request) (*aws.Response, error)
}
func (s *APISet) RegisterHandler(handler Handler) {
s.handlers[handler.Name()] = handler
}
func (s *APISet) QueryHandler(op string) (Handler, bool) {
h, ok := s.handlers[op]
return h, ok
}
func NewAPISet(version, namespace string) *APISet {
return &APISet{
Version: version,
Namespace: namespace,
handlers: make(map[string]Handler),
}
}
type QueryOperationHandler struct {
Name_ string
ParamsUnmarshaller UnmarshalParamsFunc
Proto interface{}
IsEC2 bool
Handler HandlerFunc
}
func (h *QueryOperationHandler) Name() string {
return h.Name_
}
func (h *QueryOperationHandler) UnmarshalParams(req *http.Request) (interface{}, error) {
v := reflect.New(reflect.TypeOf(h.Proto))
err := UnmarshalParams(v.Interface(), req.Form, h.IsEC2)
if err != nil {
log.Info().Err(err)
return nil, &SenderFault{
Code_: "InvalidParameterValue",
Message_: "invalid parameter",
}
}
return v.Interface(), nil
}
func (h *QueryOperationHandler) Handle(req *aws.Request) (*aws.Response, error) {
return h.Handler(req)
}