prometheus/vendor/github.com/go-openapi/swag/loading.go

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2016-09-30 02:33:23 -07:00
// Copyright 2015 go-swagger maintainers
//
// 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.
package swag
import (
"fmt"
"io/ioutil"
"net/http"
"strings"
)
// LoadFromFileOrHTTP loads the bytes from a file or a remote http server based on the path passed in
func LoadFromFileOrHTTP(path string) ([]byte, error) {
return LoadStrategy(path, ioutil.ReadFile, loadHTTPBytes)(path)
}
// LoadStrategy returns a loader function for a given path or uri
func LoadStrategy(path string, local, remote func(string) ([]byte, error)) func(string) ([]byte, error) {
if strings.HasPrefix(path, "http") {
return remote
}
return local
}
func loadHTTPBytes(path string) ([]byte, error) {
resp, err := http.Get(path)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("could not access document at %q [%s] ", path, resp.Status)
}
return ioutil.ReadAll(resp.Body)
}