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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 utils
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
)
// GetJSON makes an HTTP call to the specified URL and parses the returned JSON into `out`.
func GetJSON(url string, out interface{}) error {
resp, err := http.Get(url)
if err != nil {
return err
}
return ReadJSON(resp, out)
}
// ReadJSON reads JSON from http.Response and parses it into `out`
func ReadJSON(resp *http.Response, out interface{}) error {
defer resp.Body.Close()
if resp.StatusCode >= 400 {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return fmt.Errorf("StatusCode: %d, Body: %s", resp.StatusCode, body)
}
if out == nil {
io.Copy(ioutil.Discard, resp.Body)
return nil
}
decoder := json.NewDecoder(resp.Body)
return decoder.Decode(out)
}
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