traefik/vendor/github.com/OpenDNS/vegadns2client/tokens.go

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2018-07-03 10:44:04 +00:00
package vegadns2client
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"strings"
"time"
)
// Token - struct to hold token information
type Token struct {
Token string `json:"access_token"`
TokenType string `json:"token_type"`
ExpiresIn int `json:"expires_in"`
ExpiresAt time.Time
}
func (t Token) valid() error {
if time.Now().UTC().After(t.ExpiresAt) {
return errors.New("Token Expired")
}
return nil
}
func (vega *VegaDNSClient) getBearer() string {
if vega.token.valid() != nil {
vega.getAuthToken()
}
return vega.token.formatBearer()
}
func (t Token) formatBearer() string {
return fmt.Sprintf("Bearer %s", t.Token)
}
func (vega *VegaDNSClient) getAuthToken() {
tokenEndpoint := vega.getURL("token")
v := url.Values{}
v.Set("grant_type", "client_credentials")
req, err := http.NewRequest("POST", tokenEndpoint, strings.NewReader(v.Encode()))
if err != nil {
log.Fatalf("Error forming POST to getAuthToken: %s", err)
}
req.SetBasicAuth(vega.APIKey, vega.APISecret)
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
issueTime := time.Now().UTC()
resp, err := vega.client.Do(req)
if err != nil {
log.Fatalf("Error sending POST to getAuthToken: %s", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatalf("Error reading response from POST to getAuthToken: %s", err)
}
if resp.StatusCode != http.StatusOK {
log.Fatalf("Got bad answer from VegaDNS on getAuthToken. Code: %d. Message: %s", resp.StatusCode, string(body))
}
if err := json.Unmarshal(body, &vega.token); err != nil {
log.Fatalf("Error unmarshalling body of POST to getAuthToken: %s", err)
}
if vega.token.TokenType != "bearer" {
log.Fatal("We don't support anything except bearer tokens")
}
vega.token.ExpiresAt = issueTime.Add(time.Duration(vega.token.ExpiresIn) * time.Second)
}