limit max login attempts

    username=input('Username: ')

    passwd=input('Password: ')

    f=open('config.json','w')

    config={"username": username, "password": passwd, "testUrl": "http://www.v2ex.com/generate_204", "interval_retry_connection": "20", "interval_retry_login": "10", "interval_check_status": "300"}

    config={"username": username, "password": passwd, "testUrl": "http://www.v2ex.com/generate_204", "interval_retry_connection": "20", "interval_retry_login": "10", "interval_check_status": "300", "max_times_retry_login": "5"}

    f.write(json.dumps(config))

    f.close()

    printWithTimeStamp('Configurations successfully saved.')    

    try:

        f=open('config.json')

        try:

            config=json.loads(f.readline())

            config and config['interval_retry_login'] and config['interval_check_status'] and config['username'] and config['password'] and config['interval_retry_connection'] and config['testUrl']

            #Check if the parameters all exist

        except KeyError as err:

            printWithTimeStamp('Parameter '+str(err)+' not found.')

            initconfig=json.loads(f.readline())

            config={"username": initconfig['username'], "password": initconfig['password'], "testUrl": initconfig['testUrl'], "interval_retry_connection": int(initconfig['interval_retry_connection']), "interval_retry_login": int(initconfig['interval_retry_login']), "interval_check_status": int(initconfig['interval_check_status']), "max_times_retry_login": int(initconfig['max_times_retry_login'])}

            #Check if the parameters all exist and transform format

        except KeyError as kerr:

            printWithTimeStamp('Parameter '+str(kerr)+' not found.')

            printWithTimeStamp('Configuration file is broken. Create a new one.')

            f.close()

            os.remove('config.json')

            newConfig()

        except ValueError as verr:

            printWithTimeStamp('Parameter '+str(verr)+' is invalid.')

            printWithTimeStamp('Configuration file is broken. Create a new one.')

            f.close()

            os.remove('config.json')

            newConfig()

    except PermissionError as err:

        sys.exit(err)

    return config

    os.chdir(os.path.dirname(sys.argv[0])) # To read config in the same directory

    printWithTimeStamp('Reading configurations...')

    config=loadConfig()

    times_retry_login=config['max_times_retry_login']

    printWithTimeStamp('Configurations successfully imported.')

    while True:

        printWithTimeStamp('Checking network status...')

        try:

            test=requests.get(config['testUrl'])

        except:

            printWithTimeStamp('Connection FAILED. Try again in '+config['interval_retry_connection']+' sec.')

            sleep(int(config['interval_retry_connection']))

            printWithTimeStamp('Connection FAILED. Try again in '+str(config['interval_retry_connection'])+' sec.')

            sleep(config['interval_retry_connection'])

            continue

        while not ifLoggedIn(test):

            printWithTimeStamp('You are offline. Starting login...')

            printWithTimeStamp('Login information posted to the CAS server.')

            test=requests.get(config['testUrl'])

            if not ifLoggedIn(test) :

                printWithTimeStamp('Login FAILED. Try again in '+config['interval_retry_login']+' sec. ')

                sleep(int(config['interval_retry_login']))

                times_retry_login-=1

                if times_retry_login>0: # If keep trying to login too many times, it may trigger security alarm on the CAS server

                    printWithTimeStamp('Login FAILED. Try again in '+str(config['interval_retry_login'])+' sec. '+str(times_retry_login)+r' attempt(s) remaining.')

                else:

                    printWithTimeStamp('Login FAILED.' +r'Attempts used up. The program will quit.')

                    sys.exit('Login FAILED')

                sleep(config['interval_retry_login'])

            if ifLoggedIn(test):

                printWithTimeStamp('Login successful. Current user: '+username)

                times_retry_login=config['max_times_retry_login']

                printWithTimeStamp('Login attempts reseted.')

        printWithTimeStamp('Online. Re-check status in '+config['interval_check_status']+' sec.')    

        printWithTimeStamp('Online. Re-check status in '+str(config['interval_check_status'])+' sec.')    

        sleep(int(config['interval_check_status']))

        sleep(config['interval_check_status'])

if __name__ == '__main__':

    main()   

 No newline at end of file

# CAS_Auto_Login

SUSTC network account auto login

SUSTC network account auto login. Coded in Python. Java version with GUI is coming soon.      

[caslogin-gui](https://github.com/NorrisHua/caslogin-gui)

## Requirements

requests 2.10.0

### Installation

'interval_retry_connection': In second. If the status check failed (e.g. the server was down or there is no Internet connection), how long the program will wait before next attempt. Default value is 20.  

'interval_check_status':  In second. Determine how long the program will wait before next status check. Default value is 300.  

'interval_retry_login':  In second. If the login failed (e.g. wrong username & password combination, or the CAS server was down), how long the program will wait before next attempt. Default value is 10.  

'max_times_retry_login': Maximum time the program will try to login to the server. Default value is 5.

## Contacts

If there are any questions, please reach me on Telegram.   

[@NorrisHua](https://www.telegram.me/NorrisHua)