package main
|
|
|
|
import (
|
|
"compress/gzip"
|
|
"encoding/json"
|
|
"errors"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
)
|
|
|
|
func get(client *http.Client, url string, output interface{}) error {
|
|
req, err := http.NewRequest("GET", url, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
req.Header.Add("Content-Type", "application/json; charset=utf-8")
|
|
req.Header.Add("Accept-Encoding", "gzip")
|
|
|
|
response, err := client.Do(req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer response.Body.Close()
|
|
|
|
err = checkErrors(response)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
body, err := decompress(response)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return decodeJSON(body, &output)
|
|
}
|
|
|
|
func checkErrors(response *http.Response) error {
|
|
if response.StatusCode != 200 {
|
|
body, _ := ioutil.ReadAll(response.Body)
|
|
return errors.New("Bad response: " + string(body))
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func decompress(response *http.Response) (io.Reader, error) {
|
|
header := response.Header.Get("Content-Encoding")
|
|
|
|
if len(header) < 1 {
|
|
return response.Body, nil
|
|
}
|
|
|
|
reader, err := gzip.NewReader(response.Body)
|
|
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return reader, nil
|
|
}
|
|
|
|
func decodeJSON(body io.Reader, into interface{}) error {
|
|
jsonDecoder := json.NewDecoder(body)
|
|
|
|
return jsonDecoder.Decode(&into)
|
|
}
|