/
ep_apilist.go
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/
ep_apilist.go
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// Copyright 2023 Cisco Systems, Inc. and its affiliates
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0
package apilist
import (
"context"
"encoding/json"
"fmt"
"github.com/cisco-open/go-lanai/pkg/actuator"
"github.com/cisco-open/go-lanai/pkg/web"
"io/fs"
"net/http"
)
const (
ID = "apilist"
EnableByDefault = false
)
// ApiListEndpoint implements actuator.Endpoint, actuator.WebEndpoint
//goland:noinspection GoNameStartsWithPackageName
type ApiListEndpoint struct {
actuator.WebEndpointBase
staticPath string
}
func newEndpoint(di regDI) *ApiListEndpoint {
if !fs.ValidPath(di.Properties.StaticPath) {
panic("invalid static-path for apilist endpoint")
}
ep := ApiListEndpoint{
staticPath: di.Properties.StaticPath,
}
ep.WebEndpointBase = actuator.MakeWebEndpointBase(func(opt *actuator.EndpointOption) {
opt.Id = ID
opt.Ops = []actuator.Operation{
actuator.NewReadOperation(ep.Read),
}
opt.Properties = &di.MgtProperties.Endpoints
opt.EnabledByDefault = EnableByDefault
})
return &ep
}
// Read never returns error
func (ep *ApiListEndpoint) Read(ctx context.Context, _ *struct{}) (interface{}, error) {
resp, e := parseFromStaticFile(ep.staticPath)
if e != nil {
// Note we don't expose error. Instead, we return 404 like nothing is there
logger.WithContext(ctx).Warnf(`unable to load static API list file "%s": %v`, ep.staticPath, e)
return nil, web.NewHttpError(http.StatusNotFound, fmt.Errorf("APIList is not available"))
}
return resp, nil
}
func parseFromStaticFile(path string) (ret interface{}, err error) {
// open
var file fs.File
var e error
for _, fsys := range staticFS {
if file, e = fsys.Open(path); e == nil {
break
}
}
if e != nil {
return nil, e
}
// read
defer func(){ _ = file.Close() }()
decoder := json.NewDecoder(file)
if e := decoder.Decode(&ret); e != nil {
return nil, e
}
return
}