Golang Config.Client方法代碼示例

// facebookHandler is a ContextHandler that gets the OAuth2 Token from the ctx
// to get the corresponding Facebook User. If successful, the user is added to
// the ctx and the success handler is called. Otherwise, the failure handler
// is called.
func facebookHandler(config *oauth2.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
	if failure == nil {
		failure = gologin.DefaultFailureHandler
	}
	fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
		token, err := oauth2Login.TokenFromContext(ctx)
		if err != nil {
			ctx = gologin.WithError(ctx, err)
			failure.ServeHTTP(ctx, w, req)
			return
		}
		httpClient := config.Client(ctx, token)
		facebookService := newClient(httpClient)
		user, resp, err := facebookService.Me()
		err = validateResponse(user, resp, err)
		if err != nil {
			ctx = gologin.WithError(ctx, err)
			failure.ServeHTTP(ctx, w, req)
			return
		}
		ctx = WithUser(ctx, user)
		success.ServeHTTP(ctx, w, req)
	}
	return ctxh.ContextHandlerFunc(fn)
}

func (p *Engine) _google(code string) (*User, error) {
	var cfg oauth2.Config
	if err := p.Dao.Get("google.oauth", &cfg); err != nil {
		return nil, err
	}

	tok, err := cfg.Exchange(oauth2.NoContext, code)
	if err != nil {
		return nil, err
	}

	cli := cfg.Client(oauth2.NoContext, tok)
	res, err := cli.Get("https://www.googleapis.com/oauth2/v1/userinfo?alt=json")
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	var gu GoogleUser
	dec := json.NewDecoder(res.Body)
	if err := dec.Decode(&gu); err != nil {
		return nil, err
	}
	return p.Dao.AddUser(gu.ID, "google", gu.Email, gu.Name, gu.Link, gu.Picture)
}

func handleCallback(w http.ResponseWriter, r *http.Request, config *oauth2.Config, profilesURL, code string) {
	token, err := config.Exchange(oauth2.NoContext, code)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	client := config.Client(oauth2.NoContext, token)
	response, err := client.Get(profilesURL)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	defer response.Body.Close()
	rawBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	s, _ := session.Manager.SessionStart(w, r)
	defer s.SessionRelease(w)

	s.Set("id_token", token.Extra("id_token"))
	s.Set("access_token", token.AccessToken)
	s.Set("profile", string(rawBody))

	http.Redirect(w, r, "/user", http.StatusMovedPermanently)
}

func Client(ctx context.Context, config *oauth2.Config, options ...Option) (*http.Client, *oauth2.Token, error) {
	o := processOpts(options)
	if o.filecache != nil {
		tok, err := o.filecache.Token()
		if err == nil {
			o.tok = tok
		}
	}

	if o.tok != nil {
		tok, err := config.TokenSource(ctx, o.tok).Token()
		if err == nil {
			return config.Client(ctx, tok), tok, nil
		}
	}

	tok, err := ExecuteFlow(ctx, config, options...)
	if err != nil {
		return nil, nil, err
	}
	if o.filecache != nil {
		_ = o.filecache.Write(tok)
	}
	return config.Client(ctx, tok), tok, nil
}

// googleHandler is a ContextHandler that gets the OAuth2 Token from the ctx
// to get the corresponding Google Userinfoplus. If successful, the user info
// is added to the ctx and the success handler is called. Otherwise, the
// failure handler is called.
func googleHandler(config *oauth2.Config, success, failure ctxh.ContextHandler) ctxh.ContextHandler {
	if failure == nil {
		failure = gologin.DefaultFailureHandler
	}
	fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
		token, err := oauth2Login.TokenFromContext(ctx)
		if err != nil {
			ctx = gologin.WithError(ctx, err)
			failure.ServeHTTP(ctx, w, req)
			return
		}
		httpClient := config.Client(ctx, token)
		googleService, err := google.New(httpClient)
		if err != nil {
			ctx = gologin.WithError(ctx, err)
			failure.ServeHTTP(ctx, w, req)
			return
		}
		userInfoPlus, err := googleService.Userinfo.Get().Do()
		err = validateResponse(userInfoPlus, err)
		if err != nil {
			ctx = gologin.WithError(ctx, err)
			failure.ServeHTTP(ctx, w, req)
			return
		}
		ctx = WithUser(ctx, userInfoPlus)
		success.ServeHTTP(ctx, w, req)
	}
	return ctxh.ContextHandlerFunc(fn)
}

func getClient(config *oauth2.Config, code string) (*drive.Service, error) {
	if config == nil {
		return nil, errors.New("Google Drive is not configured")
	}

	token := &oauth2.Token{AccessToken: code}
	return drive.New(config.Client(context.Background(), token))
}

// TokenOAuthClient returns an oauth2 client for a specific token
func (c *client) TokenOAuthClient(ctx context.Context, config *oauth2.Config, userToken *oauth2.Token) (client *http.Client, err error) {

	if !userToken.Valid() { // if user token is expired
		userToken = &oauth2.Token{RefreshToken: userToken.RefreshToken}
	}

	return config.Client(ctx, userToken), err
}

// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getSheetClient(ctx context.Context, authConfig *oauth2.Config) *http.Client {
	tok, err := tokenFromFile(config.SheetCredentials)
	if err != nil {
		tok = getTokenFromWeb(authConfig)
		saveToken(config.SheetCredentials, tok)
	}
	return authConfig.Client(ctx, tok)
}

func createClient(cfg *oauth2.Config) (*http.Client, error) {
	tok, err := getToken(cfg)

	if err != nil {
		return nil, err
	}
	return cfg.Client(context.Background(), tok), nil
}

// NewClientTokenTLS returns a client at the specified url that
// authenticates all outbound requests with the given token and
// tls.Config if provided.
func NewClientTokenTLS(uri, token string, c *tls.Config) Client {
	config := new(oauth2.Config)
	auther := config.Client(oauth2.NoContext, &oauth2.Token{AccessToken: token})
	if c != nil {
		auther.Transport.(*oauth2.Transport).Base = &http.Transport{TLSClientConfig: c}
	}
	return &client{auther, uri}
}

// GetClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func GetClient(ctx context.Context, config *oauth2.Config) *http.Client {
	cacheFile := tokenCacheFile()
	tok, err := tokenFromFile(cacheFile)
	if err != nil {
		tok = getTokenFromWeb(config)
		saveToken(cacheFile, tok)
	}
	return config.Client(ctx, tok)
}

// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
	cacheFile := filepath.Join("./.credentials", url.QueryEscape("gmail_token.json"))

	token, err := tokenFromFile(cacheFile)
	if err != nil {
		log.Fatalf("Unable to retrieve token from cached credential file. %v", err)
	}
	return config.Client(ctx, token)
}

// TODO: cache the twitter api call
// TODO: implement OPTIONS
func (l LinkerssHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	log.Printf("%+v\n", req)

	// TODO: has to be a cleaner pattern than this to get an int from query params
	numTweets := l.DefaultNumTweets
	numTweetsStr := req.URL.Query().Get("numTweets")
	if numTweetsStr != "" {
		var err error
		numTweets, err = strconv.Atoi(numTweetsStr)
		if err != nil {
			w.WriteHeader(http.StatusBadRequest)
			w.Write([]byte(fmt.Sprintf("invalid numTweets %s", numTweetsStr)))
			return
		}
	}
	if numTweets > l.MaxNumTweets {
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte(fmt.Sprintf("invalid numTweets %d, must be less than %d",
			numTweets, l.MaxNumTweets)))
		return
	}

	// set up the twitter client
	config := oauth2.Config{}
	token := oauth2.Token{AccessToken: l.AccessToken}
	httpClient := config.Client(oauth2.NoContext, &token)
	client := twitter.NewClient(httpClient)

	// fetch the timeline
	screenName := req.URL.Query().Get("screenName")
	userTimelineParams := &twitter.UserTimelineParams{
		ScreenName: screenName, Count: numTweets}
	tweets, _, err := client.Timelines.UserTimeline(userTimelineParams)
	if err != nil {
		log.Fatal("error getting user timeline: %v", err)
	}

	// filter down to just tweets with urls
	urlTweets := make([]twitter.Tweet, 0)
	for _, t := range tweets {
		if t.Entities.Urls != nil {
			urlTweets = append(urlTweets, t)
		}
	}

	// turn them into feed entries
	feed := tweetsToFeed(urlTweets, screenName, l.Pool)

	// write back to client as rss
	err = feed.WriteRss(w)
	if err != nil {
		log.Fatal("error outputting as rss: %v", err)
	}
}

func newOAuthClient(ctx context.Context, config *oauth2.Config) *http.Client {
	cacheFile := tokenCacheFile(config)
	token, err := tokenFromFile(cacheFile)
	if err != nil {
		token = tokenFromWeb(ctx, config)
		saveToken(cacheFile, token)
	} else {
		log.Printf("Using cached token %#v from %q", token, cacheFile)
	}

	return config.Client(ctx, token)
}

// getClient uses a Context and Config to retrieve a Token
// then generate a Client. It returns the generated Client.
func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
	cacheFile, err := tokenCacheFile()
	if err != nil {
		log.Fatalf("Unable to get path to cached credential file. %v", err)
	}
	tok, err := tokenFromFile(cacheFile)
	if err != nil {
		tok = getTokenFromWeb(config)
		saveToken(cacheFile, tok)
	}
	return config.Client(ctx, tok)
}