/
bearer.go
65 lines (52 loc) · 1.27 KB
/
bearer.go
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package bearer
import (
"encoding/json"
"errors"
"io"
"net/http"
)
// Token implementation for Bearer authentication
type Token struct {
T string `json:"token"`
E int `json:"expires_in"`
}
// Method is set to "Bearer"
func (tk Token) Method() string {
return "Bearer"
}
// String form of Bearer token
func (tk Token) String() string {
return tk.T
}
// ExpiresIn token lifetime in seconds
func (tk Token) ExpiresIn() int {
return tk.E
}
func decodeTokenResponse(data io.ReadCloser) (*Token, error) {
tk := Token{}
err := json.NewDecoder(data).Decode(&tk)
if err != nil {
return nil, err
}
return &tk, nil
}
// RequestToken requests Bearer token from authentication service
func RequestToken(username, password string, params map[string]string) (*Token, error) {
url := params["realm"] + "?service=" + params["service"] + "&scope=" + params["scope"]
hc := &http.Client{}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
if username != "" && password != "" {
req.SetBasicAuth(username, password)
}
resp, err := hc.Do(req)
if err != nil {
return nil, err
}
if resp.StatusCode != 200 {
return nil, errors.New("[AUTH::BEARER] Bad response status: " + resp.Status + " >> " + url)
}
return decodeTokenResponse(resp.Body)
}