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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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