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// Package influxdata implements the OAuth2 protocol for authenticating users through InfluxCloud.
// It is based off of the github implementation.
package influxcloud
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strconv"
"github.com/markbates/goth"
"golang.org/x/oauth2"
)
const (
// The hard coded domain is difficult here because influx cloud has an acceptance
// domain that is different and we will need that for enterprise development.
defaultDomain string = "cloud.influxdata.com"
userAPIPath string = "/api/v1/user"
domainEnvKey string = "INFLUXCLOUD_OAUTH_DOMAIN"
authPath string = "/oauth/authorize"
tokenPath string = "/oauth/token"
)
// New creates a new influx provider, and sets up important connection details.
// You should always call `influxcloud.New` to get a new Provider. Never try to create
// one manually.
func New(clientKey, secret, callbackURL string, scopes ...string) *Provider {
domain := os.Getenv(domainEnvKey)
if domain == "" {
domain = defaultDomain
}
tokenURL := fmt.Sprintf("https://%s%s", domain, tokenPath)
authURL := fmt.Sprintf("https://%s%s", domain, authPath)
userAPIEndpoint := fmt.Sprintf("https://%s%s", domain, userAPIPath)
return NewCustomisedURL(clientKey, secret, callbackURL, authURL, tokenURL, userAPIEndpoint, scopes...)
}
// NewCustomisedURL is similar to New(...) but can be used to set custom URLs to connect to
func NewCustomisedURL(clientKey, secret, callbackURL, authURL, tokenURL, userAPIEndpoint string, scopes ...string) *Provider {
p := &Provider{
ClientKey: clientKey,
Secret: secret,
CallbackURL: callbackURL,
UserAPIEndpoint: userAPIEndpoint,
Config: &oauth2.Config{
ClientID: clientKey,
ClientSecret: secret,
RedirectURL: callbackURL,
Endpoint: oauth2.Endpoint{
AuthURL: authURL,
TokenURL: tokenURL,
},
Scopes: scopes,
},
providerName: "influxcloud",
}
return p
}
// Provider is the implementation of `goth.Provider` for accessing Influx.
type Provider struct {
ClientKey string
Secret string
CallbackURL string
UserAPIEndpoint string
HTTPClient *http.Client
Config *oauth2.Config
providerName string
}
// Name is the name used to retrieve this provider later.
func (p *Provider) Name() string {
return p.providerName
}
// SetName is to update the name of the provider (needed in case of multiple providers of 1 type)
func (p *Provider) SetName(name string) {
p.providerName = name
}
func (p *Provider) Client() *http.Client {
return goth.HTTPClientWithFallBack(p.HTTPClient)
}
// Debug is a no-op for the influxcloud package.
func (p *Provider) Debug(debug bool) {}
// BeginAuth asks Influx for an authentication end-point.
func (p *Provider) BeginAuth(state string) (goth.Session, error) {
url := p.Config.AuthCodeURL(state)
session := &Session{
AuthURL: url,
}
return session, nil
}
// FetchUser will go to Influx and access basic information about the user.
func (p *Provider) FetchUser(session goth.Session) (goth.User, error) {
sess := session.(*Session)
user := goth.User{
AccessToken: sess.AccessToken,
Provider: p.Name(),
}
if user.AccessToken == "" {
// data is not yet retrieved since accessToken is still empty
return user, fmt.Errorf("%s cannot get user information without accessToken", p.providerName)
}
response, err := p.Client().Get(p.UserAPIEndpoint + "?access_token=" + url.QueryEscape(sess.AccessToken))
if err != nil {
if response != nil {
response.Body.Close()
}
return user, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return user, fmt.Errorf("%s responded with a %d trying to fetch user information", p.providerName, response.StatusCode)
}
bits, err := ioutil.ReadAll(response.Body)
if err != nil {
return user, err
}
err = json.NewDecoder(bytes.NewReader(bits)).Decode(&user.RawData)
if err != nil {
return user, err
}
err = userFromReader(bytes.NewReader(bits), &user)
return user, err
}
func userFromReader(reader io.Reader, user *goth.User) error {
u := struct {
ID int `json:"id"`
Email string `json:"email"`
Bio string `json:"bio"`
Name string `json:"name"`
Login string `json:"login"`
Picture string `json:"avatar_url"`
Location string `json:"location"`
}{}
err := json.NewDecoder(reader).Decode(&u)
if err != nil {
return err
}
user.Name = u.Name
user.NickName = u.Login
user.Email = u.Email
user.Description = u.Bio
user.AvatarURL = u.Picture
user.UserID = strconv.Itoa(u.ID)
user.Location = u.Location
return err
}
//RefreshToken refresh token is not provided by influxcloud
func (p *Provider) RefreshToken(refreshToken string) (*oauth2.Token, error) {
return nil, errors.New("Refresh token is not provided by influxcloud")
}
//RefreshTokenAvailable refresh token is not provided by influxcloud
func (p *Provider) RefreshTokenAvailable() bool {
return false
}
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