auth.go

package twitterscraper

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/cookiejar"
)

const (
	loginURL     = "https://api.twitter.com/1.1/onboarding/task.json"
	bearerToken2 = "AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA"
)

type (
	flow struct {
		Errors []struct {
			Code    int    `json:"code"`
			Message string `json:"message"`
		} `json:"errors"`
		FlowToken string `json:"flow_token"`
		Status    string `json:"status"`
	}

	verifyCredentials struct {
		Errors []struct {
			Code    int    `json:"code"`
			Message string `json:"message"`
		} `json:"errors"`
	}
)

func (s *Scraper) getFlowToken(data map[string]interface{}) (string, error) {
	headers := http.Header{
		"Authorization":             []string{"Bearer " + s.bearerToken},
		"Content-Type":              []string{"application/json"},
		"User-Agent":                []string{"Mozilla/5.0 (Linux; Android 11; Nokia G20) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.88 Mobile Safari/537.36"},
		"X-Guest-Token":             []string{s.guestToken},
		"X-Twitter-Auth-Type":       []string{"OAuth2Client"},
		"X-Twitter-Active-User":     []string{"yes"},
		"X-Twitter-Client-Language": []string{"en"},
	}

	jsonData, err := json.Marshal(data)
	if err != nil {
		return "", err
	}
	req, err := http.NewRequest("POST", loginURL, bytes.NewReader(jsonData))
	if err != nil {
		return "", err
	}
	req.Header = headers

	resp, err := s.client.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

	var info flow
	err = json.NewDecoder(resp.Body).Decode(&info)
	if err != nil {
		return "", err
	}

	if len(info.Errors) > 0 {
		return "", fmt.Errorf("auth error (%d): %v", info.Errors[0].Code, info.Errors[0].Message)
	}

	return info.FlowToken, nil
}

// IsLoggedIn check if scraper logged in
func (s *Scraper) IsLoggedIn() bool {
	req, err := http.NewRequest("GET", "https://api.twitter.com/1.1/account/verify_credentials.json", nil)
	if err != nil {
		return false
	}
	var verify verifyCredentials
	_, err = s.RequestAPI(req, &verify)
	if err != nil || verify.Errors != nil {
		s.isLogged = false
	} else {
		s.isLogged = true
	}
	return s.isLogged
}

// Login to Twitter
func (s *Scraper) Login(username string, password string) error {
	s.setBearerToken(bearerToken2)

	err := s.GetGuestToken()
	if err != nil {
		return err
	}

	// flow start
	data := map[string]interface{}{
		"flow_name": "login",
		"input_flow_data": map[string]interface{}{
			"flow_context": map[string]interface{}{
				"debug_overrides": map[string]interface{}{},
				"start_location":  map[string]interface{}{"location": "splash_screen"},
			},
		},
	}
	flowToken, err := s.getFlowToken(data)
	if err != nil {
		return err
	}

	// flow instrumentation step
	data = map[string]interface{}{
		"flow_token": flowToken,
		"subtask_inputs": []map[string]interface{}{
			{
				"subtask_id":         "LoginJsInstrumentationSubtask",
				"js_instrumentation": map[string]interface{}{"response": "{}", "link": "next_link"},
			},
		},
	}
	flowToken, err = s.getFlowToken(data)
	if err != nil {
		return err
	}

	// flow username step
	data = map[string]interface{}{
		"flow_token": flowToken,
		"subtask_inputs": []map[string]interface{}{
			{
				"subtask_id": "LoginEnterUserIdentifierSSO",
				"settings_list": map[string]interface{}{
					"setting_responses": []map[string]interface{}{
						{
							"key":           "user_identifier",
							"response_data": map[string]interface{}{"text_data": map[string]interface{}{"result": username}},
						},
					},
					"link": "next_link",
				},
			},
		},
	}
	flowToken, err = s.getFlowToken(data)
	if err != nil {
		return err
	}

	// flow password step
	data = map[string]interface{}{
		"flow_token": flowToken,
		"subtask_inputs": []map[string]interface{}{
			{
				"subtask_id":     "LoginEnterPassword",
				"enter_password": map[string]interface{}{"password": password, "link": "next_link"},
			},
		},
	}
	flowToken, err = s.getFlowToken(data)
	if err != nil {
		return err
	}

	// flow duplication check
	data = map[string]interface{}{
		"flow_token": flowToken,
		"subtask_inputs": []map[string]interface{}{
			{
				"subtask_id":              "AccountDuplicationCheck",
				"check_logged_in_account": map[string]interface{}{"link": "AccountDuplicationCheck_false"},
			},
		},
	}
	_, err = s.getFlowToken(data)
	if err != nil {
		return err
	}

	s.isLogged = true
	return nil
}

// Logout is reset session
func (s *Scraper) Logout() {
	s.isLogged = false
	s.guestToken = ""
	s.client.Jar, _ = cookiejar.New(nil)
	s.setBearerToken(bearerToken)
}