Keep socket open until client terminates

I am passing a user input license key (client) to a validation (server) that maps the user input to the valid licenses in my licensing API. I need the server connection to stay open until the client sends the correct license - maybe close the connection after 3 attempts. When I open the server socket it closes upon receiving the first input from the client - whether it is a good request or bad. How do I close the connection only on successful validation?

I tried wrapping the validation check in a loop but this becomes recursive as we need the user to initiate the validation check when they click submit from tkinter button on client.

import requests

from xml.etree import ElementTree as ET

import socket



key = '***'

secret = '***'

request_type = {'Content-type': 'text/xml', 'Accept': 'text/xml'}

productURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/products'

orderURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1_3/orders'



order_id = 

lic_key = 



def Main():

    data = ""

    host = "127.0.0.1"

    port = 5000



    mySocket = socket.socket()

    mySocket.bind((host,port))



    mySocket.listen(5)

    conn, addr = mySocket.accept()

    print ("Connection from: " + str(addr))

    user_key = conn.recv(1024).decode()            



    order_response = requests.get(orderURL, headers=request_type)



    order_root = ET.fromstring(order_response.content)



    for child in order_root.iter('*'):

        if child.tag == 'id':

            order_id.append(child.text)



    i = 0

    while i < len(order_id):

        licenseURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/orders/'+order_id[i]+'/licenses'

        lic_response = requests.get(licenseURL, headers=request_type)

        lic_root = ET.fromstring(lic_response.content)



        for child in lic_root.iter('*'):

            if child.tag == 'key':

                lic_key.append(child.text)

        i += 1



    print("validating...........")

    if data != "SUCCESS":

        if user_key in lic_key:

            message = "Success"

        else:

            message = "Failure"    

        data = str(message).upper()

        print ("sending: " + str(data))

        conn.send(data.encode())



if __name__ == '__main__':

    Main()

asked Dec 28 '18 at 19:18

Chris Beck

Read how to create a Minimal, Complete, and Verifiable example. Your server in this example never closes the connection directly, but only reads one blob and sends one blob. When Main() returns, mySocket is out of scope closing the connection. Note that TCP is a streaming protocol, so recv(1024) can receive any amount of data from 0 (client closed connection) to 1024 bytes of data. You'll need to define a protocol and ensure you read until you have a complete message, and send complete messages. After accepting the connection, loop on receiving messages and sending good/bad responses until you have a good message.

– Mark Tolonen
Dec 28 '18 at 23:44

This answer I recently gave has an example of a message protocol.

– Mark Tolonen
Dec 28 '18 at 23:49

add a comment |

I tried wrapping the validation check in a loop but this becomes recursive as we need the user to initiate the validation check when they click submit from tkinter button on client.

import requests

from xml.etree import ElementTree as ET

import socket



key = '***'

secret = '***'

request_type = {'Content-type': 'text/xml', 'Accept': 'text/xml'}

productURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/products'

orderURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1_3/orders'



order_id = 

lic_key = 



def Main():

    data = ""

    host = "127.0.0.1"

    port = 5000



    mySocket = socket.socket()

    mySocket.bind((host,port))



    mySocket.listen(5)

    conn, addr = mySocket.accept()

    print ("Connection from: " + str(addr))

    user_key = conn.recv(1024).decode()            



    order_response = requests.get(orderURL, headers=request_type)



    order_root = ET.fromstring(order_response.content)



    for child in order_root.iter('*'):

        if child.tag == 'id':

            order_id.append(child.text)



    i = 0

    while i < len(order_id):

        licenseURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/orders/'+order_id[i]+'/licenses'

        lic_response = requests.get(licenseURL, headers=request_type)

        lic_root = ET.fromstring(lic_response.content)



        for child in lic_root.iter('*'):

            if child.tag == 'key':

                lic_key.append(child.text)

        i += 1



    print("validating...........")

    if data != "SUCCESS":

        if user_key in lic_key:

            message = "Success"

        else:

            message = "Failure"    

        data = str(message).upper()

        print ("sending: " + str(data))

        conn.send(data.encode())



if __name__ == '__main__':

    Main()

asked Dec 28 '18 at 19:18

Chris Beck

Read how to create a Minimal, Complete, and Verifiable example. Your server in this example never closes the connection directly, but only reads one blob and sends one blob. When Main() returns, mySocket is out of scope closing the connection. Note that TCP is a streaming protocol, so recv(1024) can receive any amount of data from 0 (client closed connection) to 1024 bytes of data. You'll need to define a protocol and ensure you read until you have a complete message, and send complete messages. After accepting the connection, loop on receiving messages and sending good/bad responses until you have a good message.

– Mark Tolonen
Dec 28 '18 at 23:44

This answer I recently gave has an example of a message protocol.

– Mark Tolonen
Dec 28 '18 at 23:49

add a comment |

I tried wrapping the validation check in a loop but this becomes recursive as we need the user to initiate the validation check when they click submit from tkinter button on client.

import requests

from xml.etree import ElementTree as ET

import socket



key = '***'

secret = '***'

request_type = {'Content-type': 'text/xml', 'Accept': 'text/xml'}

productURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/products'

orderURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1_3/orders'



order_id = 

lic_key = 



def Main():

    data = ""

    host = "127.0.0.1"

    port = 5000



    mySocket = socket.socket()

    mySocket.bind((host,port))



    mySocket.listen(5)

    conn, addr = mySocket.accept()

    print ("Connection from: " + str(addr))

    user_key = conn.recv(1024).decode()            



    order_response = requests.get(orderURL, headers=request_type)



    order_root = ET.fromstring(order_response.content)



    for child in order_root.iter('*'):

        if child.tag == 'id':

            order_id.append(child.text)



    i = 0

    while i < len(order_id):

        licenseURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/orders/'+order_id[i]+'/licenses'

        lic_response = requests.get(licenseURL, headers=request_type)

        lic_root = ET.fromstring(lic_response.content)



        for child in lic_root.iter('*'):

            if child.tag == 'key':

                lic_key.append(child.text)

        i += 1



    print("validating...........")

    if data != "SUCCESS":

        if user_key in lic_key:

            message = "Success"

        else:

            message = "Failure"    

        data = str(message).upper()

        print ("sending: " + str(data))

        conn.send(data.encode())



if __name__ == '__main__':

    Main()

asked Dec 28 '18 at 19:18

Chris Beck

I tried wrapping the validation check in a loop but this becomes recursive as we need the user to initiate the validation check when they click submit from tkinter button on client.

import requests

from xml.etree import ElementTree as ET

import socket



key = '***'

secret = '***'

request_type = {'Content-type': 'text/xml', 'Accept': 'text/xml'}

productURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/products'

orderURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1_3/orders'



order_id = 

lic_key = 



def Main():

    data = ""

    host = "127.0.0.1"

    port = 5000



    mySocket = socket.socket()

    mySocket.bind((host,port))



    mySocket.listen(5)

    conn, addr = mySocket.accept()

    print ("Connection from: " + str(addr))

    user_key = conn.recv(1024).decode()            



    order_response = requests.get(orderURL, headers=request_type)



    order_root = ET.fromstring(order_response.content)



    for child in order_root.iter('*'):

        if child.tag == 'id':

            order_id.append(child.text)



    i = 0

    while i < len(order_id):

        licenseURL = 'https://'+key+':'+secret+'@www.sendowl.com/api/v1/orders/'+order_id[i]+'/licenses'

        lic_response = requests.get(licenseURL, headers=request_type)

        lic_root = ET.fromstring(lic_response.content)



        for child in lic_root.iter('*'):

            if child.tag == 'key':

                lic_key.append(child.text)

        i += 1



    print("validating...........")

    if data != "SUCCESS":

        if user_key in lic_key:

            message = "Success"

        else:

            message = "Failure"    

        data = str(message).upper()

        print ("sending: " + str(data))

        conn.send(data.encode())



if __name__ == '__main__':

    Main()

python sockets

asked Dec 28 '18 at 19:18

Chris Beck

asked Dec 28 '18 at 19:18

Chris Beck

asked Dec 28 '18 at 19:18

Chris Beck

asked Dec 28 '18 at 19:18

Chris Beck

asked Dec 28 '18 at 19:18

Chris Beck

Read how to create a Minimal, Complete, and Verifiable example. Your server in this example never closes the connection directly, but only reads one blob and sends one blob. When Main() returns, mySocket is out of scope closing the connection. Note that TCP is a streaming protocol, so recv(1024) can receive any amount of data from 0 (client closed connection) to 1024 bytes of data. You'll need to define a protocol and ensure you read until you have a complete message, and send complete messages. After accepting the connection, loop on receiving messages and sending good/bad responses until you have a good message.

– Mark Tolonen
Dec 28 '18 at 23:44

This answer I recently gave has an example of a message protocol.

– Mark Tolonen
Dec 28 '18 at 23:49

add a comment |

Read how to create a Minimal, Complete, and Verifiable example. Your server in this example never closes the connection directly, but only reads one blob and sends one blob. When Main() returns, mySocket is out of scope closing the connection. Note that TCP is a streaming protocol, so recv(1024) can receive any amount of data from 0 (client closed connection) to 1024 bytes of data. You'll need to define a protocol and ensure you read until you have a complete message, and send complete messages. After accepting the connection, loop on receiving messages and sending good/bad responses until you have a good message.

– Mark Tolonen
Dec 28 '18 at 23:44

This answer I recently gave has an example of a message protocol.

– Mark Tolonen
Dec 28 '18 at 23:49

Read how to create a Minimal, Complete, and Verifiable example. Your server in this example never closes the connection directly, but only reads one blob and sends one blob. When Main() returns, mySocket is out of scope closing the connection. Note that TCP is a streaming protocol, so recv(1024) can receive any amount of data from 0 (client closed connection) to 1024 bytes of data. You'll need to define a protocol and ensure you read until you have a complete message, and send complete messages. After accepting the connection, loop on receiving messages and sending good/bad responses until you have a good message.

– Mark Tolonen
Dec 28 '18 at 23:44

This answer I recently gave has an example of a message protocol.

– Mark Tolonen
Dec 28 '18 at 23:49

add a comment |

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