networks

[opaque nymph]

Problem here was, that you used hard coded token, and you should use it from the /token function, so i was thinking it was that.

[pure furnace]

yeah i know, but token doesn't change regardless i think

what is the header name?

[opaque nymph]

Idk which you mean, but you should have everything here: https://api.mail.tm/

[pure furnace]

import requests
import json

payload = {
    "address": "email",
    "password": "pass"
}
making_account_thingy = {
    "address": "[e-mail]",
    "password": "helpmepls"
}
r_token = requests.post("https://api.mail.tm/token", json=payload)
things = r_token.text.split(":")
token = things[1]
headers = {
    "token": token
}
r = requests.get("https://api.mail.tm/me", headers=headers)
print(r)
print(r.text)

This just kinda.... doesn't work lol

idrc about it lol

but ty anyways haha

[opaque nymph]

Then idk. Sorry. I never used this one nor auth Token on API XD

[pure furnace]

np, thanks for trying to help haha

[opaque nymph]

You are welcome 😄

[fluid egret]

Hey. Is here anyone who knows web3.py

from web3 import Web3, WebsocketProvider
import json

def check():
web3 = Web3(Web3.WebsocketProvider('wss://mainnet.infura.io/ws/v3/'))
web3.isConnected()
if web3.isConnected() == True:
print('connected')
else:
print('check your infura address')
new_transaction_filter = web3.eth.filter('pending')
new_transaction_filter.get_new_entries()

I have to get list of pending transactions using python and infura but now infura doesn't support web3.eth.filter and I on't know how do to it

[late spindle]

I've got a question

Why does 20.120.47.225/13 has a netID of 20.120.0.0/13 and not 20.0.0.0/13?

[clear bobcat]

/13 means that you have mask 255.248.0.0 so 20.120.47.255 & 255.248.0.0 = 20.120.0.0

[late spindle]

But why 120 and not 0?

[earnest roost]

Hello, I want to mesure the delay between two machines communicating on my local network with ROS. I was wondering if I could send the current time with the time module and then mesure the difference between the real time on the receiving machine. Is the time module precise enough? I want an accuracy in the millisecond range

[clear bobcat]

Your mask is not 255.0.0.0 but it's 255.248.0.0 - then id is IP address & mask

[late spindle]

I see

Thanks

[clear bobcat]

I think that the key is to synchronize time on both machines

[earnest roost]

Is there a proper way to do that? What's behind a ping function

[clear bobcat]

Speaking honestly I have never do that. You can take a look at this article https://en.wikipedia.org/wiki/Network_Time_Protocol

I think that there are existing solutions in this area but you need to find some articles or documents

[rustic crane]

[Q] requests lib:
website has in html:

<form id="formLogin">
    <div class="login">
    <input id="inputName" placeholder="Enter your name" type="text"/>
    <button type="submit">
... etc...

It's under url lets say abc.gg, I want to log in so I can access next page, I do:

url = 'http://abc.gg'
payload = {'inputName' : 'JohnDoe'}
r = requests.post(url, data=payload) 

It says cannot post 404 error, so I do get:

url = 'http://abc.gg'
payload = {'inputName' : 'JohnDoe'}
r = requests.get(url, data=payload) 

Still doesn't work. How do I access payload of inputName this html tag:
<input id="inputName" placeholder="Enter your name" type="text"/>
How to acces that inputName to set my value and send to website?

[wintry drift]

@charred mesa I've removed your message as it's not on topic to this channel. Please ensure you stay on topic in future.

[charred mesa]

ok, do you know what channel is of this topic?

[wintry drift]

as per the channel name, networking. channel descriptions also goes into detail over allowed topics.

[prisma cobalt]

i think he meant what channel was best suited to his particular question Scragly

[charred mesa]

yes but i already had an answer on it, thank you

[prisma cobalt]

👍

[crimson oxide]

Does anyone work with raw sockets?

[clear bobcat]

Me a little

[clear rock]

i do

[ember ledge]

Is there any steps to securing a server socket allowing connections from anyone aside from making a bash script to block IP's that don't follow the sockets protocal/have an ID at the start? I'm planning on making a app, but I don't feel like getting hacked due to bad socket practices.

[analog zenith]

Hey guys, do I need any sort of prerequisite knowledge to start learning networking? or is basic programming knowledge good enough?

[light zealot]

what's that?

[prisma cobalt]

yeah

[prisma cobalt]

the socket library

[prisma cobalt]

how can make something that only accepts connections from certain IP's sure, just a python dictionary lookup table, or even maybe a set idk 🤷‍♂️

[atomic plinth]

does anyone know how to find ip address on Vsphere all vms are showing same iP

{'value': [{'name': 'vmnet4', 'type': 'STANDARD_PORTGROUP', 'network': 'network-3291'} what does network represent here??

[trim moth]

I did gave that a thought fir a brief amount of time, and all i could come up with was to first let any client connect to teh server and the authenticate it based on a password or smthng, and if authentication fails, close that connected socket. The that'd require having a database of clients registered on your app, makes it similar to allowing only some specific client IPs or sockets pre defined in a data struct to connect to the server as evorage suggested above. For an app, I'd suggest making a separate registration section where users firat have to register themselves so that their ip, and passwords get stored for later authentication, and then come back and login to use the actual app

[trim moth]

Ye lol i do

[trim moth]

Yeah lol basic to intermediate knowledge is good enough to start with something like sockets

[light zealot]

ah, so there's no difference between sockets and raw sockets, I'm so dumb

[trim moth]

!e

import sockets

[errant bay]

@trim moth :x: Your eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "<string>", line 1, in <module>
003 | ModuleNotFoundError: No module named 'sockets'

[trim moth]

There's no module called "sockets" while what he meant by "raw sockets" was the "socket" libarary.
mind the "s"

!e

import socket

[light zealot]

Yeah I got it, just can't believe how dumb I am

[trim moth]

lmao happens

[ruby radish]

Hello everyone

So I just got
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833)
error when trying to get my client to connect with the server.

My code is the following(written in Python)

Server:

#!/usr/bin/env python3
#server

import socket, ssl

HOST = '192.168.116.132'  # host IP
PORT = 56789      # Port to listen on (non-privileged ports are > 1023)


context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.load_cert_chain(certfile="./server.crt", keyfile="./server.key")
bindsocket = socket.socket()
bindsocket.bind((HOST, PORT))
bindsocket.listen(5)
print("Connected.")
while True:
        conn, addr = bindsocket.accept()
        connstream = context.wrap_socket(conn, server_side =True)
        data = conn.recv(1024).decode()
        if not data:
            break
        print("out: " + str(data))
        conn.send(data.encode())
        try:
            deal_with_client(connstream)
        finally:
            connstream.shutdown(socket.SHUT_RDWR)
            connstream.close()
def deal_with_client(connstream):
    data = connstream.read()
    #null data == client finished with us
    while data:
        if not do_something(connstream,data):
            #if return false, done with client
            break
        data = connstream.read()
        #done with client

And client:

#!/usr/bin/env python3
#client 

import socket,ssl
HOST = '192.168.116.132'

PORT = 56789        # The port used by the server

context = ssl.SSLContext(ssl.PROTOCOL_TLS)
context.verify_mode = ssl.CERT_REQUIRED
context.check_hostname = True
context.load_verify_locations('./rootCA.crt')
conn = context.wrap_socket(socket.socket(socket.AF_INET), server_hostname = HOST)
conn.connect((HOST, PORT))
cert = conn.getpeercert()


with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    while True:
        message = ("hello world!") 
        s.sendall(message.encode())
        data = s.recv(1024).decode()
        print("In: " + data)
        ```

I was given these as references: https://docs.python.org/2/library/ssl.html#client-side-operation
https://docs.python.org/2/library/ssl.html#server-side-operation
However I am unsure if I implemented it correctly.

For context, am following these instructions: https://pastecord.com/yjafoqobag.sql

Otherwise...things have been working so far so good..but the certification to work is frustrating.

And I am using two separate VM machines, one for client, and one for server in doing this

[flat rain]

</div>
<div class="trn-defstat">
<div class="trn-defstat__name">Total XP</div>
<div class="trn-defstat__value" data-stat="PVPTotalXp">
15,935
</div>

How can i use urllib.request & BeautifulSoup to pull data number inside PVPTotalXp ??
i want it get data and print out 15,935 only

[ember ledge]

can anyone give me an idea how to make a chat program that will connect two particular computer and enable to chat. No GUI is required. A begining project. Keep it simple

[prisma cobalt]

CHECK THE PINS

third time now

[ember ledge]

where

[ember ledge]

where

[prisma cobalt]

what device are you on sorry?

[ember ledge]

chair

[ember ledge]

I am sitting on chair

[prisma cobalt]

🤦 do you want to know how to do this or not

[ember ledge]

what to pin or the code

[prisma cobalt]

no, you dont know how to access pins, are you on a computer or a mobile device?

[ember ledge]

yeah I know

[ember ledge]

yes I know

[prisma cobalt]

you know how to access pins?

theres an example chat on there

[ember ledge]

I don't want to know anything but please help me with the chat application

[prisma cobalt]

https://realpython.com/python-sockets/ use this

[ember ledge]

Thnx a lot

[ember ledge]

thnx

[light zealot]

lol ,m dead

[zinc crag]

lmao

[leaden dagger]

💀

[trim moth]

lol

[crimson oxide]

So the ethernet frame on a wireless nic, the source and destination are a local reference correct?

The mac address is typically the local "ethernet" mac on the wireless card

[ivory rampart]

Ethernet frame on WiFi

[crimson oxide]

?

[rustic crane]

[Q] Requests lib - POST payload:
Hi, Im trying to post payload to website. From the Dev Console (network tab) I found it needs "request payload" like this:
123:42["userData",{"name":"Doe","code":"","avatar":[9,31,13,-1],"join":"bz1nPvY09I1A","language":"English","createPrivate":false}]

I think I sent data properly, even 2 different ways, but I get 404 error:
#1 First way

url = "..."
payload = {"name":"John", "code":"", "avatar":[6,6,9,-1],
"join":"bz1nPvY09I1As", "language":"English", "createPrivate": "false"}

r = requests.post(url, data=payload) #NOTICE DATA=...
print(r.status_code)

#2 Sceond way

url = "..."
payload = {"name":"John", "code":"", "avatar":[6,6,9,-1],
"join":"bz1nPvY09I1As", "language":"English", "createPrivate": "false"}
data = json.dump(payload)

r = requests.post(url, json=data) #NOTICE JSON=
print(r.status_code)

Why 404, is payload constructed wrong?

[whole prawn]

Not sure if it's the problem but your example from the dev console has a JSON boolean true whereas your payloads have a string "false"

Oh and you don't need to serialise to JSOn twice....

(in the second one)

requests json= will correctly serialise python booleans to JSON booleans so you can just put it in as ```py
{"name":"John", "code":"", "avatar":[6,6,9,-1],
"join":"bz1nPvY09I1As", "language":"English", "createPrivate": False}

[whole prawn]

Tag ^^^

[sly gust]

Hey can someone please help me with the shoppy API pleasee, ive been struggling for quite some time now

[thin sun]

https://images-ext-1.discordapp.net/external/QAlDt53rT3APOqR4Zo0tTrBl2JQ_osGQFm7YqxCJEY8/https/http.cat/404.jpg?width=484&height=387

[trim moth]

lol

[bright summit]

Hey guys, I am new to development. Though I have been solving comptetive programming questions but i kinda wanted to create a Facebook bot.

The thing is i have to moderate a live session on Facebook in which people ask questions and i have to copy these questions and paste them onto Google docs so that the host can read the questions.

Can this be automated by a Facebook bot made in Python? If so, could you guys please provide me an outline to how should i start studying in order to create this bot.

[rustic crane]

Requests lib - POST payload help needed

[ember ledge]

Anyone prefer me any pdf networking tutorial?
and also networking modules(except socket) pls

[trim moth]

check out the requests module, i think there's a http module too

[ember ledge]

hmm

[trim moth]

lol

sockets are cool tho lol

[ruby radish]

anyone know how to fix

this is code

[iron fjord]

im trying to get any incoming data then send it to all the clients. I'm a beginner. What am i doing wrong?

  
        try:
            msg = s.recv(BUFFER)
            for client in clients:
                client.send(msg.encode(FORMAT))
            print(f"recieved message: {msg}")
        except:
            continue

[prisma cobalt]

your encoding an already encoded msg since you never decoded it

also is clients a list of sockets?

[iron fjord]

ye

[prisma cobalt]

okay remove the .encode(FORMAT) then

[iron fjord]

oh its meant to be decode

or do i need to put anything?

[prisma cobalt]

no its not, its just not supposed to be there

msg = s.recv(BUFFER)
for client in clients:
    client.send(msg)
print(f"recieved message: {msg}")

[iron fjord]

but this still doesnt seem to fix it

[iron fjord]

also are you sure? if i dont encode it then it throws an error

[prisma cobalt]

okay you recv it in its encoded form yes? so its already encoded and you dont need to encode it again

show me what clients is if your getting an error

[iron fjord]

oh your right

i didn't think of it like that

def sendMessage():
    while True:
        msg = str(input())
        try:
            s.send(f"{name}: {msg}".encode(FORMAT))
            print("Sent message!")
        except:
            continue```

this is client

if i remove the try

i get this ```

Exception in thread Thread-2:
Traceback (most recent call last):
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.1264.0_x64__qbz5n2kfra8p0\lib\threading.py", line 954, in _bootstrap_inner
self.run()
File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.1264.0_x64__qbz5n2kfra8p0\lib\threading.py", line 892, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\RawrI\Desktop\python projects\Chatapp\server.py", line 23, in listenForMessages
msg = s.recv(BUFFER)
OSError: [WinError 10057] A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied```

if i do s.recv does it get it from a specific client?

[iron fjord]

I was able to solve it

i realized i was doing s.recv() as in i was trying to get info from itself lol

i just put the clients in a class then constantly listen for data that way

thanks @prisma cobalt

[prisma cobalt]

👍

[ruby radish]

i dont get whats going on

[prisma cobalt]

looks like your recving a character not in the utf-8 character set

[trim moth]

Whats the kind of data you're receiving?

If it's text data encoded with encode(), the decode method should be able to decod it into a string, apparently, the data is from a file lll

[sterile kindle]

hey everyone,

I own a host on digitalocean, and i have a apache web server running on it. i own a domain name on namecheap.com, how do i point my namecheap domain to my webserver host on digital ocean?

[whole prawn]

Define an A Record on namecheap that points to your webserver's public IP is prob the easiest

[tawdry finch]

is there any library for controlling bluetooth

or recieving bluetooth signals

i have a microcontroller and a bluetooth i want to capture its data in my laptop

using laptops Bluetooth using python

i want to display data in my gui

i just want to know how to collect bluetooth data using python

[trim moth]

i think the socket library can help you

no it can't

[ember ledge]

does a proxy hide ipv4?

when packets are sent to a server?

[clear bobcat]

When you send packets via proxy server will see your proxy IP as a client IP

[ember ledge]

ahhh k

ty

[tawdry moss]

new to this channel

[trim moth]

Welcome

[tawdry finch]

thankyou man

[trim moth]

lol

[tough dagger]

Ummmm keep track on which sequence or message it happens. It is probably due to the fact that utf-8 has 1 to 4 bytes encoded characters, so if you're unlucky with that 1024 random split it will go ka-boom

[ruby radish]

Oh I have it working now

Thank you

[wide path]

I have a hard time confirming my thoughts, from what I understand. It is two Pi that are connected wireless and using UDP to send a temp sensor package. I am trying to understand the time/event trigger solution and the pros and cons

Time-triggered solution is good because they have a set of specific intervals where the system expects a package every x min, which then makes it so that the allocation of CPU can be calculated beforehand. Are negatives maybe too expensive/redundancy?

Event-driven solution is suitable for small systems where you are only expecting very few events? Negatives hard to know when to expect an event/package loss.

Mixed solution will have both solutions, positives, and negatives.

I am sure that there are more and better examples of these solutions, and I would love it if anyone could elaborate more on this topic.

[bright tendon]

Hello, does anyone know how to fix a broken string in Python the problem is with the \ character, I get the whole string from API?
Here is the screenshot:

This is from my VS Code.

I have to fix this programatically.

[timber pond]

Is this homework 😂

[west mountain]

Is there any practical difference between using urllib.parse.quote() and urllib.parse.quote_plus(), and why may you choose to use one over the other? As far as I understand, the only difference is that quote_plus() encodes spaces into + instead of %20, but does it make a difference? Thanks in advance.

[wide path]

can anyone tell me if I am correct or incorrect

[ember ledge]

print("[+] Http Request >> " + packet[http.HTTPRequest].Host + packet[http.HTTPRequest].Path)
TypeError: can only concatenate str (not "bytes") to str

anyt ideas on how to fix?

[whole prawn]

"[+] Http Request >> " is a string, packet[http.HTTPRequest].Host is bytes which you can't concatenate (as the error says)

Try packet[http.HTTPRequest].Host.decode()

[whole prawn]

Swishy

[hallow vine]

@west mountain muli-line and not?

[west mountain]

Sorry, what do you mean?

[hallow vine]

quote and quote plus , i wondered if the + was a multi line read ?

so no one answered and i just look it up

 urllib.parse.quote_plus(string, safe='', encoding=None, errors=None)

    Like quote(), but also replace spaces with plus signs, as required for quoting HTML form values when building up a query string to go into a URL. Plus signs in the original string are escaped unless they are included in safe. It also does not have safe default to '/'.

[west mountain]

I don't understand if there's any important difference between using %20 and +

[ember ledge]

Can selenium be used to send packages through a websocket opened by the javascript of the website and monitor the traffic going through said websocket?

[wide path]

could anyone look at my question ?

[gloomy root]

Not really, you'd just be using selenium to run a ks script

[gloomy root]

Your question doesn't massively make alot of sense e.g. Using TCP when this seems to require reliable transport of data??

Overall interval based sending would make the load more predictable yes

[ember ledge]

Hmm, what are the alternatives for doing it? I figure a proxy would work, but perhaps there is an easier way

[gloomy root]

Well if its a TLS socket e. G. Wss:// then their isnt really anyway to monitor what's actually being send

Activity wise though a reverse proxy / proxy might work ig

[ember ledge]

Okay, thanks 🙂

[ruby radish]

Does our Internet runs on TCP/IP still? I know tcp was designed with security in mind so it already has a lot of security mechanism built-in.

[tough dagger]

You're you, perfect expression of yourself.
As for your question I don't get what you want to ask exactly. If it's about detection of errors then yeah time based seem to be working, but if you only have message every few minutes minutes why not just send it over TCP ? And if you have many receivers then hmm maybe some protocol like gossip might help you.

[gloomy root]

TCP wasnt really designed for security, it's just a protocol used for reliable data transmission, your internet can run on either TCP or UDP packets depending on what it is

[ruby radish]

Ooooh

Got it

[gloomy root]

things like FPS video games etc... are udp based because you need speed but not reliability of data

[tough dagger]

Well with UDP basically you get port, and TCP adds sequencing and confirmation of receivement and pretty much that's it

[gloomy root]

UDP just doesnt have those round trips

meanwhile tcp:

[tough dagger]

Well as a protocol UDP by itself is pretty useless. It almost always need some machinery to either detect message, or reconstruct message or get it later, or ignore it. But basically content matters so if it's just say a video stream uplink to many you don't give a damn given that the stream itself has some sequence points from which one can recover plus if it's a stream then one would need to sequence messages probably. But say it's just temp sensor, do you care about loss of one sample ? In the simples form yes timed events are easier to track if one message got lost but still some sequence might be needed.

[clear bobcat]

You can just don't care about missing parts

[tough dagger]

In PS3 I used logger over UDP to a router and from there via built-in access router to my laptop over WiFi and well small messages in not so rainy day had quite good received to send ratio, but as one gets messages larger or more frequent the buffers might just overflow and messages can well go down the drain frequently

[tough dagger]

You can not

[clear bobcat]

Nope?

[tough dagger]

Nope

[clear bobcat]

When you have video conversation for example

[tough dagger]

If you want to receive and you never receive it is pointless

[clear bobcat]

When you lost some packets you don't care

You don't need to record whole conversation

[tough dagger]

I got your point but still you imply you get something at least

Which is why UDP alone plainly is often not enough

[gloomy root]

Hmm it has the same socket behavior as TCP sockets do

just without the garentee of data being ordered and correct

although you often can set a checksum for the checking data correctness

[tough dagger]

Well in theory reordering shouldn't happen that often

[gloomy root]

things like QUIC implement reliable transport on top of UDP but that takes alot of it's speed away

if your network is good generally it's not a big issue

If its an app between two local host apps you likely wont experience any issues

[ruby radish]

Anyone know this

[prisma cobalt]

maybe 1000 * 999

[ruby radish]

uhhh

is there work proof

@prisma cobalt

this??/

idk

[prisma cobalt]

lets say there are 5 people
eacch number represents a person

1 2
1 3
1 4
1 5

2 3
2 4
2 5

3 4
3 5

4 5

2000 i guess then

[ruby radish]

2000?

oh

wait its 1000

i think

???

how u get 2000

nvm

i get it

ty

[static prawn]

does anybody know any ports for NA-WEST server in Fortnite

If possible pls gimme port for NA-WEST in California

🙏

[light zealot]

how can this be so accurate

[sacred raptor]

@ruby radish
data = conn.recv(1024).decode("UTF-8")
conn.send(data.encode("UTF-8"))

[ruby radish]

im good now haha ty

[hexed glen]

import socket

HOST = 'localhost'  # The server's hostname or IP address
PORT = "8000"        # The port used by the server

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    s.sendall(b'Hello, world')
    data = s.recv(1024)

print('Received', repr(data))

can someone help me

[brisk basalt]

hi,does anyone know about x-crsf-token?

[hexed glen]

im a beginner and i cant run this code

[storm saffron]

Can't run it?

[hexed glen]

i find whats problem thank you anyway

[civic bay]

from requests.structures import CaseInsensitiveDict
import requests

url = "http://127.0.0.1:4384/api/"

headers = CaseInsensitiveDict()
headers["Content-Type"] = "application/json"

data = '{"command": "update"}'

try:
    res = requests.post(url, headers=headers, data=data)
    print(res.status_code)
except:
    print('Server closed')

How do I go about disconnecting after it sends a post?

[stone dirge]

anyone know the reason for a '403 error'

[gleaming ivy]

import socket

MASK = "255.255.255.0"

MASK_B = [int(b) for b in MASK.split('.')]

LOCAL_IP = str(socket.gethostbyname(socket.gethostname()))

LOCAL_IP_B =  [int(b) for b in LOCAL_IP.split('.')]

NET_b  = [ str(LOCAL_IP_B[i] & MASK_B[i]) for i in range(4)]

NET = '.'.join([b if int(b) > 0 else "255" for b in NET_b])
``` Sorry for the repost from [#help-honey](/guild/267624335836053506/channel/776184243570475048/), i just need a confirm for this algorithm, that must be translated in C, is this the correct way for finding the "broadcast address" for an udp client inside that should be inside any potential local network, assuming `MASK` is retrieved at runtime? If you're wondering, the goal is to broadcast the local IP of an IoT device ( only inside is local network ), so that an app in the same network can connect to the TCP server running for configuration.

Thanks in advance for all the suggestions/clarifications... I'd really appreciate them! 🙂

[storm saffron]

uh well it's pretty messy

looks like it would get the job done

but most of the code is converting back and forth between data types

[neon kiln]

how i can use threding ?

and i want login ssh port

[raw field]

@stone dirge 403 is a HTTP status Code, to indicate that you are trying to use restricted files from the server. Restricted in the sense , You are not allowed to read that file.

[thin sun]

.status cat 403

https://images-ext-1.discordapp.net/external/RbcPWmFhlc184klk1K6HwNu43xZiUYWqokOmGManfyY/https/http.cat/403.jpg?width=515&height=412

[ember ledge]

How can I log my VPS errors to a Discord channel? Or at least a better method than using journalctl

@gleaming ivy from scapy.all import * solves all things

[ember ledge]

Anyone here play with scapy? I'd hoped ^ would spark chatter

[slim umbra]

I am doing a little blockchain project and I am opening up sockets to get instructions from nodes.. is this recommended? What is the best form for me to get instructions from nodes on my PC outside of my network by providing an IP and Port?

[burnt hearth]

anyone dm me if you want me to tell you any exploitable vulnerabilities in your network

[earnest lava]

How can I reopen a websocket connection when it closes?

[clear rock]

any projects to make which involve networking?

[pulsar bay]

Hey folks! I'm trying to detect motion and people with opencv and deploy it with fastapi, but I'm having some trouble integrating the two. Details are in #help-potato. Could someone pop in and help out?

[tough dagger]

You can't, new connection has to be established and while the data stream is bidirectional, connecting itself isn't so if it was issued by them unless app somehow allows it to have some open port for client to connect back you can't. Alternative is to server to connect to you but it's less popular as you would need open for listening port and public IP or even use thirparty/buddy system.
The easiest seem to reconnect beck to server and using some session Id or from scratch rework the expected state

[still yarrow]

Some interesting things might be making your own HTTP client or making your own chat client and server and what-not

I myself learned quite a bit by making my own HTTP client

[clear rock]

oh, what does a HTTP client mean exactly? i only know about raw sockets for now

[still yarrow]

Alright, so you know the requests library, right?

[clear rock]

yes

so basically a program which can send and receive data?

like get and post requests

[still yarrow]

Yes

[clear rock]

oh

and what should i use to make it?

websockets?

[still yarrow]

and so basically it's sending a payload formatted like

GET / HTTP/1.1
Host: www.google.com

[still yarrow]

No, sockets

[clear rock]

epic, ill try

[zinc cove]

nm = nmap.PortScanner()
while True:

ip = input("\nInput IP address to scan: ")
if not ip:
    break
print(f"\n--- beginning scan of {ip}")
output = nm.scan(ip, '22-1024')
print(f"--- --- command: {nm.command_line()}")

print("----- nmap scan output -------------------")
pprint(output)

ERROR: nm = nmap.PortScanner()
AttributeError: module 'nmap' has no attribute 'PortScanner'

anyone could help to solve this, I installed NMAP but still its not working on Pycharm

[static fable]

#help-lemon socket help needed at the mentioned channel

[ember ledge]

How can i update Exe files directly from visual studio code

[prisma cobalt]

thats not networking?

[idle portal]

https://httpstatuses.com/403 is a good site for looking up HTTP status codes

[ember ledge]

#discord-bots teleport

[slim umbra]

I am trying to connect to Bitcoin nodes via sockets, is this safe? I just got a malware warning from my antivirus just from sending a GET request from the socket module in python

[trim moth]

Firewall and anti-viruses are known to block sockets stuff and thats fine and pretty normal, just disable your antivirus/firewall and you'll be fine

[split idol]

hello
i would like to setup my server on an external network, so that someone from a different network can connect to it. how does one go about doing this?

[slim umbra]

utilizing sockets and listening through them?

[split idol]

yea thats what im doing but it only works on the internal networks, only on devices connected to the same network the server is hosted on

i want to go beyond that

[zinc cove]

import nmap
nm = nmap.PortScanner()
while True:

ip = input("\nInput IP address to scan: ")
if not ip:
    break
print(f"\n--- beginning scan of {ip}")
output = nm.scan(ip, '22-1024')
print(f"--- --- command: {nm.command_line()}")

print("----- nmap scan output -------------------")
pprint(output)

ERROR: nm = nmap.PortScanner()
AttributeError: module 'nmap' has no attribute 'PortScanner'

anyone can help to solve this, please. I am using PyCharm IDE, Python3, Installed all necessary pkg to run it as I searched first from StackOverflow to solve it, but it is still now working for me.

[slim umbra]

Well when you are binding your socket to listen are you inputting your Public IP?

[clear bobcat]

!code

[errant bay]

Here's how to format Python code on Discord:

```py
print('Hello world!')
```

These are backticks, not quotes. Check this out if you can't find the backtick key.

[clear bobcat]

!pypi nmap

[errant bay]

nmap v0.0.1

Map numbers from one range to another

[clear bobcat]

!pypi python-nmap

[errant bay]

python-nmap v0.6.4

This is a python class to use nmap and access scan results from python3

[clear bobcat]

Which nmap do you have?

[lone edge]

I want to learn python socket programming pls help

[trim moth]

check pinned messages of this channel lol

[lone edge]

pls help

[lone edge]

ok

[trim moth]

see this, this is for fire transferr, figure out how to transfer text data instead and make a chat app, and look at articles from "sockets in python" on google lol

https://www.thepythoncode.com/article/send-receive-files-using-sockets-python

[lone edge]

ok

[trim moth]

this too
https://realpython.com/python-sockets/

[lone edge]

can we make a global socket meaning can we transfer ip to website for getting realtime chat website or app than rather on lan or pan

[trim moth]

oh, websites, it could be a django website or something and take the text data and transfer to the clients using underlying sockets

[deep nova]

not sure if this is the correct channel, mind me if not 😄

so i have a raspberry pi and i want to host a website on it with my own website adress. Do you know a good tutorial that teaches how to do so?

[ember ledge]

multiple websocket connections?

[ember ledge]

So basically i got a question. When sending requests, it's waiting for a response. Is there a way of speeding up the response time alot?

Currently using asyncio + sockets.

Sockets for request, and asyncio for running the requests.

[gloomy root]

I would recommend using the asyncio streams setup you're given by asyncio

there's alot of behavior you need to get down correctly to use the normal sockets and asyncio together correctly

[slim umbra]

Guys just how secure is communication through sockets with untrusted users?

[gloomy root]

err by default, about as trustworthy as turning up at another families home claiming to be the father (its not)

By default sockets are pretty much entirely plain text, and viewable by just about anyone who can see the data / packet of data

and there are plenty of attacks like man-in-the-middle attacks that leverage that fact and can alter the requests between the person you think you're contacting etc...

[slim umbra]

and malware wise?

Can I be infected just by sending a message through a socket?

[gloomy root]

well thats about the same as any other data transfer in the sense that if you download it or have that data into your system then sure

sockets arent very complicated things

they just in lames terms shuffle data from one computer to another over the network

it does pretty much nothing to protect or secure you

[slim umbra]

where can I learn to protect myself?

I mean then how can I make sure the data is what I want

[gloomy root]

well the only way you can really truly be sure is several security layers and sandboxing environments

The real question is what you're doing with raw sockets with no abstraction like this really

[slim umbra]

Well I am just looking at the P2P system that bitcoin implements and how these guys are just openly communicating with random peers

[gloomy root]

well thats sorta an entirely diffrent system and setup

[slim umbra]

I mean I am recreating the communication myself in Python and my code is pretty bare

[gloomy root]

was TL;DR bitcoin and other crypto currencies work on the basis of trust no one

it works off the basis of there are no friends and everyone is trying to get you

alot of the design around it extends and its built upon a thing called blockchain

https://www.ibm.com/topics/what-is-blockchain

[slim umbra]

No yeah I know I mean I messed around with Bitcoin back in 2012 haha I mean I have a couple of million I lost by throwing my keys away back then.

I am trying to mess with the Nodes side of it

I am connecting with peers through a script I wrote but my worries are that I am not securing my socket connection?

I am just sending and receiving I have no security protocol in place and want to know if I should have one in place

[gloomy root]

well... it would probably be a good idea

there are a fairly large amount of attacks, data leaks etc... recorded in history just from http issues alone

because of the lack of encryption between server and client

you get essentially all those issues and more

but again, the whole crypto setup is built off blockchain and thats what makes it secure

[slim umbra]

the whole crypto setup is built off blockchain? or blockchain is built off crypto ? and I mean I don't even know how attacks can be sent through sockets, I am trying to find a read on this do you know of one?

I figure this Message Structure is how Bitcoin defends againts malicous attacks such as Malware?

Checking the first 8 bytes and making sure it's the magic value that is needed to communicate right? by breaking the message down? I imagine the len of a malware would be pretty long and a 8 bytes is pretty short for a malware?

but then it goes onto checking the len of the payload and then checking the checksum of the first 4 to verify that the payload is actually the payload that was destined to be sent

but I mean then the payload has an unrequired len so could reading this payload invoke a malware onto the machine?

Why am I not finding any reads on this through a simple search..

[slim umbra]

Or is this now how things work? if I open a socket its only sent to python? it can't run any code outside of it?

[unreal depot]

Hey all, I have a quick question regarding networking from within a docker container. If I'm using a python socket server and I do something like this:
server.bind(('localhost', 7634))
When I run this inside of a container with that port exposed, I can't seem to hit it. But if I make that into:
server.bind(('0.0.0.0', 7634))
I can connect to it. Could someone explain the difference and how I might be able to get the first method to work? I understand that 0.0.0.0 is more of a wildcard interface, but where is my connection going if not to localhost? Thanks!

[harsh osprey]

hey python community, im trying to build a cryptocurrency (full nodes written in python, with clients made with Flutter/Dart)

anyone here know how to make the p2p network (needed to transmit transcations)

[ember ledge]

I need urgent help
I have made this python code (from raspberrypi.org)

from requests import get
import json
from pprint import pprint
from haversine import haversine

stations = 'https://apex.oracle.com/pls/apex/raspberrypi/weatherstation/getallstations'
weather = 'https://apex.oracle.com/pls/apex/raspberrypi/weatherstation/getlatestmeasurements/2387750'

my_lat = 28.541511
my_lon = 77.373089

all_stations = get(stations).json()['items']

def find_closest():
    smallest = 20036
    for station in all_stations:
        station_lon = station['weather_stn_long']
        station_lat = station['weather_stn_lat']
        distance = haversine(my_lon, my_lat, station_lon, station_lat)
        if distance < smallest:
            smallest = distance
            closest_station = station['weather_stn_id']
    return closest_station

closest_stn = find_closest()

weather = weather + str(closest_stn)

my_weather = get(weather).json()['items']
pprint(my_weather)

Whenever I run this program and type my_weather, I get []
Is the problem with my program or the server?

[whole prawn]

Well, if I open those URLs in a browser I get what looks like sensible data so probably not the server's problem

[ember ledge]

its weather info so why theres problem

[whole prawn]

Your code won't run for me at all due to haversine being called with the wrong number of arguments

That might be a version thing I guess maybe

Oh

Have a close look at this line and what it's doing ```py
weather = weather + str(closest_stn)

And what the state of weather is before this line

I had to change the haversine call to be like ```py
distance = haversine((my_lon, my_lat), (station_lon, station_lat))

[whole mural]

Hi, im looking for some websites to help me to learn the tcp/ip and internet process and have a very good knowledge about that. I would like to start to learn without python, then when i'll have a good knowledge i could use python.

[terse hill]

Anyone able to help with the folowing:
import json
from ripe.atlas.sagan import (
TracerouteResult,
PingResult,
DnsResult,
SslResult,
HttpResult,

)
from ripe.atlas.cousteau import (
Ping,
Traceroute,
AtlasSource,
AtlasCreateRequest,
AtlasLatestRequest
)
is_sucess, result = AtlasLatestRequest(msm_id=29920648).create()

if is_sucess:
for x in result :y=json.dumps(x)
print ("{} {}".format("Source address",x['src_addr']))
print ("{} {}".format("Destination address",x['dst_addr']))
#print ("{} {}".format("Packet Sent",x['.packet_sent']))#
print ("Returns",x['.rtt_median'])

result = TracerouteResult(
json.loads(y)
)

print("{}{}".format("Address Family IPv4 ",result))

Error print ("Returns",x['.rtt_median'])
KeyError: '.rtt_median'

[clear bobcat]

!code

[errant bay]

Here's how to format Python code on Discord:

```py
print('Hello world!')
```

These are backticks, not quotes. Check this out if you can't find the backtick key.

[clear bobcat]

Are you sure that there is a key .rtt_median? Maybe without dot?

[west mountain]

https://paste.pydis.com/wodahegoso
Could someone please help me with this aiohttp error I'm getting? I don't understand what it means.
Attempt to decode JSON with unexpected mimetype: text/html; charset=utf-8

[clear bobcat]

Mimetype should be application/json

[west mountain]

What does that mean? Is it an issue on my end or the server's end?

[clear bobcat]

If you expect JSON output from API it looks like issue on the server's end

[west mountain]

Ah, I understand the issue now, thanks. I've been changing host address per query, and forgetting to append /api, meaning I was fetching the wrong data 😅

Thanks for your help!

[clear bobcat]

Your welcome!

[terse hill]

Thanks for the reply according to https://ripe-atlas-sagan.readthedocs.io/en/latest/types.html#common-attributes there is but i cant work out why its not working I've tried both with and without

[clear bobcat]

As far as I see there is rtt_median attribute, not .rtt_median
Try this

print("Returns", x['rtt_median'])

[terse hill]

print("Returns", x['rtt_median'])
KeyError: 'rtt_median'

[clear bobcat]

Hmm, how about x.keys()?

Let see which keys are available

[terse hill]

Returns dict_keys(['fw', 'mver', 'lts', 'dst_name', 'af', 'dst_addr', 'src_addr', 'proto', 'ttl', 'size', 'result', 'dup', 'rcvd', 'sent', 'min', 'max', 'avg', 'msm_id', 'prb_id', 'timestamp', 'msm_name', 'from', 'type', 'group_id', 'step', 'stored_timestamp'])
Address Family IPv4 Measurement #29920648, Probe #53347

[clear bobcat]

Okay, there is no rtt_median 😦

[terse hill]

Thanks for that its been racking my brains for the last 2 hours. Just seems strange how it states it can be done yet the command dosent work

[pale ledge]

async with session.get(
        url, 
        params=params, 
        headers=headers, 
        raise_for_status=True, 
        proxy=proxy, 
        timeout=timeout, 
        ssl=False) as response:
    j = await response.json()

Is it possible for await response.json() to raise a asyncio.TimeoutError exception?

(getting json takes too long, etc.)

[ember ledge]

Is twisted still the way to go if i want to learn to make a game server?

[placid fractal]

asyncio.wait_for(response.json(), time-to-wait)

[ember ledge]

import socket
import os
server= socket.socket()
server.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
server.bind(("0.0.0.0",8000))
server.listen()
while True:
    cl,addr = server.accept()
    print("Povezao se Klijent",addr)
    zahtev =  cl.recv(5000).decode()
    metod,fajl,verzija = zahtev.splitlines()[0].split(" ")
    fajl=fajl.lstrip("/")
    print(metod,fajl,verzija)
    
    if os.path.exists(fajl):
        cl.send(b"HTTP/1.1 200 OK\r\nConnection: close \r\n\r\n")
        cl.send(open(f"python web\it academy\{fajl}","rb").read())
    else:
        cl.send(b"HTTP/1.1 404 Not Found\r\nConnection: close \r\n\r\n")
    cl.close()

why wont this work ?

when i type the file name /filename1 the website crashes

[prisma cobalt]

where are you typing the file name @ember ledge ?

[ember ledge]

i type this

localhost:8000/file1.html

file1.html is the file name

[ember ledge]

i type the file name on google search bar

this is http socketing

[prisma cobalt]

thats because its not a web thing
cl.send() is gonna crash it cause you havent told it to display html or anything

i think at least

[ember ledge]

thats not true

btw i fixed it

[prisma cobalt]

What was the problem

[ember ledge]

I changed half the code and directed the files directly

[hushed dock]

anyone have experience with Flask and SocketIO

[trim moth]

what do you want help with?

[molten carbon]

So I wanna do a SSH port forwarding from localhost:8888 to 103.215.221.141:22 and the database on port 5432
How do I do that?

I did this but I got this error

https://paste.ofcode.org/iV9x9HbpW4HXnRatPp7L3J

[pulsar axle]

proxies are for losers

use a vpn

[prisma cobalt]

thanks you for your valuable contribution

[peak moon]

guys

can i get help

[azure lily]

for what

[peak moon]

error:error **Traceback (most recent call last): File "c:/Users/moon/Desktop/wifiwindowscracker.py", line 7, in <module> result = subprocess.check_output(['netsh', 'wlan', 'show', 'profiles', i, 'key=clear']).decode("utf-8").split("\n") File "C:\Users\moon\AppData\Local\Programs\Python\Python37-32\lib\subprocess.py", line 411, in check_output **kwargs).stdout File "C:\Users\moon\AppData\Local\Programs\Python\Python37-32\lib\subprocess.py", line 512, in run output=stdout, stderr=stderr) subprocess.CalledProcessError: Command '['netsh', 'wlan', 'show', 'profiles', 'NET=NET', 'key=clear']' returned non-zero exit status 1.**

[peak moon]

hacking the passwords

of the routers

near

code

code:```py
import subprocess

data = subprocess.check_output(['netsh', 'wlan', 'show', 'profiles']).decode("utf-8").split("\n")
profiles = [i.split(":")[1][1:-1] for i in data if "All User Profile" in i]

for i in profiles:
result = subprocess.check_output(['netsh', 'wlan', 'show', 'profiles', i, 'key=clear']).decode("utf-8").split("\n")
result = [b.split(":")[1][1:-1] for b in result if "Key Content" in b]
try:
print("{:<30} | {:<}".format(i, result[0]))
except IndexError:
print("{:<30}".format(i, ""))

can i get your help pls

[peak moon]

anyone?

[molten carbon]

Any idea?

[clear bobcat]

!rule 5

[errant bay]

Rules

5. Do not provide or request help on projects that may break laws, breach terms of services, be considered malicious or inappropriate. Do not help with ongoing exams. Do not provide or request solutions for graded assignments, although general guidance is okay.

[clear bobcat]

Is this your case?
https://www.ssh.com/academy/ssh/tunneling/example#local-forwarding

[molten carbon]

I wanna connect to my postgresql database that is on my vps using my local PC

[clear bobcat]

Have you tried something like this?

ssh -L 5432:localhost:5432 103.215.221.141

[molten carbon]

I'm on a windows

[clear bobcat]

As far as I remember there was ssh command on Windows too

ssh.exe maybe

I am not using Windows for development purposes so I cannot do more

[molten carbon]

Thank you kindly

[iron fjord]

How can i close a connection to the server when i close my application? also when i want to restart my server socket it says theres already something listening on this ip and port. How can i close this aswell?

i thought about with py with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: but that didn't work

[hollow musk]

can some one help me in #help-bagel pls?

[ember ledge]

i'm not sure but s.close() should work

[iron fjord]

but how would i know to close it when the user exists the app? like if i alt f4 it doesnt disconnect

[royal lance]

Hi all, I have a weird problem since a Windows updated yesterday. I run a python script as part of a Jenkins build. This python script is executed on a windows 10 machine and does a build and then tries to copy the executable to a Linux server using scp. I first try to create the directory on the linux side using ssh + mkdir.
I use
cmd = ssh user@server mkdir/path/to/copy/to
in
subprocess.run(cmd.split(' '),shell=True,cwd='.',timeout=300)

Till yesterday this worked just fine.

But since yesterday (Windows restarted after an update) the process just hangs here.

Before the issue and even now I see some weird characters in STDERR:
STDERR: mkdir: cannot create directory ‘ca_os_binaries/191247’: File exists

This in itself had not caused any real issues in the past.

Any help in figuring out what is happening is greatly appreciated. How do I even start debugging this?

I tried paramiko and hit a wall because of some other issues... (would not load module). I can go back to that if it is very highly recommended. But I am curious if there is any way to see why the process hangs in this subprocess.run() command when executing ssh.

[slow pumice]

Did anyone work with Websockets before?

[light zealot]

try:
  #[...]
  data = s.recv(1024)
  #[...]
except ConnectionAbortedError:
  s.close()
except OSError:
  s.close()

[slender steeple]

@light zealot nah that wont work if the contexmanager doesn't work

[trim moth]

try os.system() instead of subprocess.run()?

the fact that the error says File exists is supposed to mean that the directory (or file or smthng) already does exist on the server side

and is thats the same mkdir command youre using?
coz as i know theres supposed to a space between mkdir and the path
like in mkdir path/to/copy/to

while you've typed mkdir/path/to/copy
not sure if thats really the wrong command or smthng, but i'm dumb so try the first command too lol

[silk shuttle]

I am trying to create a game with python and socket. Does anyone know how to create private lobbies?

i am thinking of something similar to skribbl.io

where you can enter a code and join a room

[trim moth]

Yeah lol you can do it, i did pretty much the same thing as what you want just a few days ago, can explain in breif if you want me to

just tell me and I'd go off explaining everything, just dont want to do it unnecessarily

[wild ferry]

hi i need to bypass acces denied on this server using python is that possible+

[narrow oak]

Probably, but not sure if anyone can assist you on that here (rule 5)

[trim moth]

lol

[silk shuttle]

yeah that would be nice

thx so much

[trim moth]

ye lmao my pleasure

so do you want to be able to have multiple lobbies running at the same time?

[silk shuttle]

yeah

[royal lance]

Oops. That was my typo on discord. I have the proper space in my subprocess command.

[trim moth]

oh

[trim moth]

and do you want to have a code to join the lobby?

[silk shuttle]

yeah

[royal lance]

Thought subprocess module superceded the os.system().. So I was sticking to subprocess module. I can try os.system().

[silk shuttle]

so when it creates, it gives you a code, or you can join an existing if one of your friends tells you the code

lol @trim moth you're too popular around here

[trim moth]

yeah, tryin would'nt hurt right?

[trim moth]

lmao it's not like that lol

[silk shuttle]

hmm

what does your code do

[trim moth]

and how would your lobby begin start the game?

[trim moth]

it's a video streaming service lol

[silk shuttle]

as soon as you enter the room, it'll be a game in process

idk if that would work

[royal lance]

Last night, I got the paramiko and scp modules to work for what I needed to get done. So, I have my setup working. I will try os.system() also, but that is not necessary right now.
I now want to figure out how to debug such an issue.. in case same thing happens in the future.

[trim moth]

so as soon as a player enters the lobby the game should begin? it's not a multiplayer?

[silk shuttle]

it's supposed to be a trading game, where like 5-10 players can buy and sell something.

[trim moth]

the error, it says tile exists, does such a file already exist in there?

[silk shuttle]

i thought it would be cool if the price was determined entirely by a small group of people

[trim moth]

ooooh

[silk shuttle]

i can implement a start button or something, but i don't think its too important

[trim moth]

yeah, but there needs to be a trigger of sorts to start the game once a satisfactory number of players have joined

[silk shuttle]

ok

i can do that

[trim moth]

like i had the connection of the host in my streaming to start the stream once all the viewers joined

[silk shuttle]

oh i see

[trim moth]

lmao

[royal lance]

Right. The file already exists. But that is not a fatal error. My problem is that my python script running on windows gets stuck at this point.
Before the windows update yesterday, I also got this error (File exists). But the python script on windows did not get stuck.
I don't think it has to do with the file exists error. Because I deleted the file and ran the script. It does not give the error, but gets stuck in the ssh command anyways..

[silk shuttle]

if i had a start button, how would i do it?

[trim moth]

yeyah, maybe the windows update has rest your firewall settings

[trim moth]

what do you use for the fornt end of the game?

[silk shuttle]

pygame

[royal lance]

That's a helpful insight. I will check. Thanks @trim moth

[trim moth]

lol my pleasure

[silk shuttle]

lmao talking to two people at once is difficult

[trim moth]

lol it's fine

so i have something in mind

as you accept client connections, add all those client sockets in a list to make things easier

each player would have a start button on his screen right?

so if there are 6 players in the game, and 1 of them clicks the start button, a flag should be sent to the server notifying it that this particular player has pressed the start button

and the game won't start till all the players click the start button

[silk shuttle]

ohhh thats a good design

[trim moth]

lol thanks

[silk shuttle]

but how do you know which player is clicking the button

do you use a dictionary with their address?

[trim moth]

form the socket you're receiving the flag

[trim moth]

yeah, like keep a record of which cllient socket has sent the start flag

once all of them send, start the game

[silk shuttle]

ok thanks

i got to go now for online school lol

[trim moth]

lol

cya

[silk shuttle]

bai

[trim moth]

boye lol 😂

[prisma cobalt]

thats sounding familiar 😂

[trim moth]

lmao

i'm a sockets chad at this point lol

[lofty bough]

!warn @zealous ruin Stop spamming. I just told you that we don't allow requests for paid work.

[errant bay]

:incoming_envelope: :ok_hand: applied warning to @zealous ruin.

[zealous ruin]

!warn @lofty bough

[zealous ruin]

haha, is there any place you would recommend to ask?

[lofty bough]

You can use any freelance searching service.

Fiverr, upwork, or something specific to your location.

[zealous ruin]

ah okay

pretty weird that this server doesn't allow it

I feel like there are a lot of devs that would love some freelance work

[lofty bough]

@zealous ruin It's a giant moderation burden. We'll have to deal with malicious projects, scams etc.

[zealous ruin]

ah

[prisma cobalt]

id love some lol, fiverr never worked for me

[ember ledge]

    resp = sock.receive()
AttributeError: 'str' object has no attribute 'receive'

Anyone got a solution?

[sturdy notch]

sock is a str? should be something else?

[formal oyster]

Is there any other way of building a server other than socket

[hoary sorrel]

Not really. A TCP server needs to use sockets, and that's the normal kind of server. You can make other kinds that listen to pipes or shared memory instead of sockets, but that's unusual

[pearl rampart]

whats the best way to start with networking ?

[thorn stratus]

Make a basic chat program

[lone edge]

which is best python network library

[trim moth]

it's sock.recv() lol

that too considering sock is a socket object, since the error says that sock is a string

[trim moth]

there's nothing like "the best" ig, just use whatever fits your purpose, there's the sockekt, urllib and http modules i know of

[lone edge]

is there any good one for beginners u found easy

[trim moth]

@lone edge sockets

try making a simple chat app using sockets to understand how to transfer data with them

once you know how to transfer data, you can trasfer any kind of data, video audio or any file the only thing that varies is the mechanics

check out the pins of this channel there's a bunch of cool stuff the person who made it must be cool as well

lol

[lapis venture]

Is the link local identifier in IPV6 (the part including and after % at the end) a solid part of the spec, or an informal thing that people use to disambiguate the possibility for same address being assigned on multiple interfaces?

[frozen drum]

yes, it's a scoped ipv6 address, but it doesn't have to be an interface

google ipv6 zone index

@lapis venture

[lapis venture]

looks like the issue I ran into was address for 3.9, but hasn't been in other versions https://bugs.python.org/issue34788

[harsh osprey]

hi, i asked a question here a while back, and it kind of got swamped, would anyone care to have a look at it, please? 🙂

[storm saffron]

that's a massive question

a bit like bill gates saying he wants to start a software company and asking if anyone knows how to write an operating system

your best bet is probably to read up in detail on how other cryptocurrencies manage the p2p nature of the implementation

but it's not that complicated, basically you need some way for nodes to communicate with each other, and a discovery system

the Chia cryptocurrency client is mostly written in Python I believe

https://github.com/Chia-Network/chia-blockchain @harsh osprey

[harsh osprey]

thankyou sir!

having somewhere to start is a huge help!

[magic phoenix]

What are the limitations of making a game or an app to use the "user as a server" technique/structure or the way you call it?

[crystal trellis]

guys i have question

guys i have question

guys i have question

guys i have question

[narrow oak]

ok

[magic phoenix]

Chill

[crystal trellis]

is it possible to make a firewall with python for windows 10

[narrow oak]

It's called peer to peer and generally you dont want too much load on the client. Usually one client only keeps a connection with exactly only one other client.

[magic phoenix]

So that means that I shouldn't have a p2p connection on for example, an online room of 4 ppl?

[narrow oak]

You obvisouly could if you want too, but the client that acts as a server needs to be aware of that there can be a lot of potential drain on the computer if he wants many people in the room. It depends on the architechture of your app after all

[narrow oak]

Kind of, but if you want to get the best out of your firewall you should maybe consider some low level language. You can also use some system commands to create sort of a firewall, in unix you can mess with the iptables for example.

[crystal trellis]

@narrow oakhow to make it on windows

some module

[magic phoenix]

How like architecture?

My app is a speedcubing timer, the only things i will only be sending is wether a client is inspecting the cube, solving it or any new message on the chat

[narrow oak]

If you dont want to rely on a central server then going with a p2p solution should be just fine.e. Note that in a p2p application you will need someway for the other clients to connect to the one client which acts as a server, that by passing their IP-address +/ port. Shouldnt really be much of a problem, once again - depends on what you want your application to be like

[magic phoenix]

Do they have to open ports or is it enough by sharing the IP?

[narrow oak]

The clients need to have open ports in order to allow TCP / UDP connections through, which can be done by the firewall

[magic phoenix]

I mean, i could use a server, but I want to have so everybody can make their own room with the people they want, not everybody using the app on the same room, and I don't have that much experience with servers yet

[magic phoenix]

Ohhh so that's what happens when you allow an app through the firewall?

[narrow oak]

Then the OS allows data to get through the firewall and then to your program so you can deal with the data they way you want, this can sometimes lead to security issues

p2p is definitely the less user friendly solution, if you care about that

[magic phoenix]

So is less user friendly because you have to share your IP with people and involves lots of security issues

Definitely gotta learn server things

[gloomy root]

everything on the network works with IPs

[magic phoenix]

I know

[narrow oak]

You will have to share the IP with server, but other clients shouldnt know each other's

anyways, if you want to go with a client-server architecture you can start by looking into sockets perhaps, or websockets if you're writing some modern web application

You can sort each room as a key in a dictionary, and the value can be some data for that room, so you can wait to implement a database and keep everything in memory if thats easier

[magic phoenix]

I just went straight to a text chat app on python tutorial 😅

Where can i start?

[magic phoenix]

So for example: {roomid: 00001, clients: 5, usernames: ['Ricky, Lizard, AwesomeDude']} and so on

[narrow oak]

I suggest you finish that chat app tutorial you stumbled upon, learn some basic networking / socket api stuff, then create some design of your core server

[narrow oak]

yeah, and maybe a value which keeps all client's socket objects

note that a dictionary is key:value

[magic phoenix]

https://www.youtube.com/watch?v=sopNW98CRag&t=1938s

This is the tutorial

[narrow oak]

{room_id: {'clients': [], ...} }

[magic phoenix]

The only "problem" is that I'm building my app (gui) with a class, and he's not

[magic phoenix]

Yeah and also gotta finish to learn some stuff i forgoy

[narrow oak]

you dont need to follow exactly like the tutorial, the important is to learn the key concepts so u can implement stuff yourself

[magic phoenix]

Ok ok

That tip does help

[mighty iron]

Can someone tell me how do they give "IP ADDRESS" as an input when using the subprocess module. I'm trying to do it with str(ip) but the ip isn't float.

[light zealot]

https://github.com/SATAN01/DogeChat You can have a look at this chat app I made recently, it might help

it follows [[room id,room passw],[clients]]]

Although ik understanding other's people's code can be tricky XD

[trim moth]

doge chat 😂

[magic phoenix]

Indeed, its tricky

Another thing, when you allow an app through the firewall, you open the ports only for that app or anything can use that port now?

[narrow oak]

Anyone can attempt to connect through that port, it's up to your app to validate the request. If your app is listening on that port then all requests from that port should go only to your app.

[magic phoenix]

Ok, so say that to play Minecraft on servers i have to open my ports, so if somebody attempts to connect on that port, Minecraft is the one who would reject or accept the connection?

[narrow oak]

Yeah, in some cases the OS can also do some work (the firewall) but mainly it's up to the app who is listening on that port

[trim moth]

yeah, if your app expects some data to be received through a port, but and your port is closed, your app will never receive the data since the os will block the flow of any kind of data

[trim moth]

and yeah, about p2p networks, is there a way to get ports opened automatically?

like, the only obstacle for a p2p network being user-friendly is, them having to opening ports on their system, only if there was a way to automate that, one could use apps usingg p2p networks with ease

[narrow oak]

It's generally a rare use case where you make the client a server, but I think that if you create a socket server listening on some specific IP, at least on windows, then there might in some cases pop up a "windows alert dialog", and after a click, you allow the program to open the server.

[mossy dagger]

hello guys im doing my software development & programing for HSC and we have a assessment task and i need help if someone the knows about my task i have 2 tasks but this networking algorithm i need help. This is the Task Outline:

The assessment includes implementation of two algorithms, one to be re-implemented with GUI, and one case study. Each algorithm is to be represented in pseudocode, implemented with a program using a simple text-based interface, verified by a set of test data that includes evidence of the expected and actual test result. One of the implemented algorithms is then required to be rebuilt using a proper GUI user interface.

[light zealot]

XD

[trim moth]

i read it twice and still did'nt understand what the actual questions are lol

[trim moth]

yeah, i've seen that happening, but that's a huge dependancy for the app to rely on the os to open the ports for it

and still not sure if that happens everytime and will happen for every user

well still worth giving it a bunch of tries tho, i'll try running a server a bunch of times listening to different ports each time, that should verify it

[prisma cobalt]

Lol, nor i, they havent actually said the question, just the rules surrounding it lol

[trim moth]

oh

lol

i thought is was blind lmao

[hollow musk]

Is it possible to use a python object in c#? (I kinda know the answer already )

If not, what u suggest i use for sending data between server(python server) and client(c# client)?

[viral wasp]

HTTP Requests. Literally simple as that.

[hollow musk]

Im trying to build an object oriented chat application and im using socket, so i dont think http request would be any help in this case to be honest cause i need the connection to be kept alive. Im just searching for an easy way to send objects between python and c#, and if i dont find any,ill use json for it. Like web applications.

[viral wasp]

Ahh, my misunderstanding.
I would for sure go with JSON as it's something that's universal. You'll just need to stringify and parse it.

[inland rampart]

It might also be possible to create C-style structs on the Python side and send them

depends on what kind of objects you're sending

serialising to JSON and serialising would be the most extensible solution

[sullen breach]

is there a guide on how to use a docker container and a cloud provider to set up a basic infrastructure

[sacred plover]

I feel like that question might be better suited for the tools and devops channel, but I am also curious

[trim moth]

sockets?

[hollow musk]

yep

[trim moth]

i'm working with a friend on a streaming service whose gui is in unity/c# and the under the hood stuff is in python, so we plan to use the c# and python sockets to communicate some data around like, some data to shown on the gui which is fetched from the underlying python scripts

[prisma cobalt]

it’s probably gonna work as well lol

[hollow musk]

well your going to be streaming data like video data, but im going to be streaming objects, if i wanted to make a client with python, i could've used pickle to make a serialized binary out of it and send it over the network.

but im going to use c#

[trim moth]

oh

[broken steeple]

In networking, the End-To-End principle is basically insuring that data gets from computer 1 to computer 2 with minimal intermediaries, and without modification or changing of the data being sent.

An example of something that hinders the end-to-end principle would be something like a Nat-Box, which receives incoming and outgoing data as an intermediary, potentially rewriting payload data and normalizing ports or obscure values.

This is pretty much correct right? Is there anything I'm misunderstanding or not elaborating on?

@ me if anyone has some feedback ^^

[clear bobcat]

I don't think that data modification or reordering aren't allowed
There are also can be many intermediate nodes and nobody counts them (you don't have a counter of visited nodes in UDP or IP protocols for example)

According to Wikipedia:

In networks designed according to this principle, application-specific features reside in the communicating end nodes of the network, rather than in intermediary nodes, such as gateways and routers, that exist to establish the network.
For me it means that retransmission and other features are hold by end nodes, not by intermediate ones

[broken steeple]

This is for an open-book & open internet question on my exam,

Internet technologies believe that this was a good idea?
Give an example of a technology that threatens (or violates) the End-to-End principle.
Explain why this technology threatens (or violates) the End-to-End principle.

When I said payload data, I meant the packet headers, my bad! But I was thinking that would be a pretty good example of a technology that harms the End-to-End principle

Whereas the positives of the End-to-End principle would be, well, getting data from point a to point b exactly as-is

[whole prawn]

Seems like a pretty textbook use-case for gRPC tbh

[trim moth]

wdym textbook use-case and gRPG?

[whole prawn]

Streaming objects back and forth between clients and servers implemented in different languages/tech

https://grpc.io/

[trim moth]

ooh

didnt knew that theres a term for wjat were doing lmao

[whole prawn]

gRPC is a specific product. RPC is the general tech

[trim moth]

it was jist python sockets before, but then we decided to have a gui, and some specific gui elements needed realtime data like no of clients connected to the server, so we cam up with using what i just learnt to call, gRPC

thanks

[whole prawn]

welcome - g'luck

[trim moth]

Yeah thanks, we'll need it

[whole prawn]

It's not too stressful. I've got a few prod services running although I actually use twirp (https://blog.twitch.tv/en/2018/01/16/twirp-a-sweet-new-rpc-framework-for-go-5f2febbf35f/) but it doesn't support streaming so you'd need to stick with gRPC I think

[trim moth]

yeah lmao

well, we're not actually streaming the videos lol

it's just streaming file data and writing it to the host machine and play the same video off the data as the data is being recieved and written to the host

[whole prawn]

Yeah makes sense

[trim moth]

lmao

was there a better way to stream?

like opening each frame of a video with cv and send the frame and show it

[whole prawn]

So video streaming is a whole different thing and I've not built anything that does it tbh

[gloomy root]

Does it need to be low latency streaming?

or can it have a 30s buffer

[trim moth]

yeah, i do have a 30s buffer between starting the file transfer, just the method i'm using, transferring the video file and playing it while writing, and then deleting after it's played just creates the illusion of playing, while sending the indivisual frame seems more like actual streaming, and the part which is unclear to me is how to send the extracted frame to the clients through sockets

[gloomy root]

I would just use a HLS stream settup tbh

trying to do it via sockets adds all sorts of complexity rather than just something like Nginx + HLS

[trim moth]

hmmm

i have no idea about Nginx and HLS

gotta enlighten myself on that any help will be apprecialted ||help me plssss||

[hollow plover]

I keep getting this error when I try to host my bot please help

[plain basin]

im not sure if this is the right section, but I'm trying to find something that will allow me to play a video on tv's through either python or command line. i've only been able to play something using Kodi using UPnP/DLNA i guess. my end goal is a server hosted on a raspberry pi that plays videos over the network to multiple TV's.

i havent been able to find an elegant solution, nor actually play anything simply without Kodi so far.

any suggestions?

[rapid garnet]

sorry guys I have a (maybe dumb) question:
If I need to make an app which has to be offline, run offline, never connect to the internet, and prevent internet from accessing to any of it's output, what happens if the computer is online? Would I need to set any particular function to be sure that the app is running like if it was on a offline computer?

[hollow musk]

Cant you just not use any thing that needs Internet? Or block the internet access of the app with firewall?

[trim moth]

just make the app in such a way that it doesn't need internet to work lol, isn't it what a offline app is? "doesn't need internet to work", or to do what it's supposed to do

[trim moth]

an android tv app that uses socket to connect to your raspberry pi server and the the raspberry pi broadcasts the video to all the connected clients
if that makes sense, seems kinda viable tho

[trim moth]

I've overcome all the complexity there is to it by spending a lot of time on it lol

[gusty dawn]

import socket
HOST = '0.0.0.0'
PORT = 65431

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    while True:
        s.listen()
        conn, addr = s.accept()
        with conn:
            print('Connected by', addr)
            while True:
                data = conn.recv(1024)
                if not data:
                    break
                stringdata = data.decode()
                print(stringdata)
                print(len(stringdata))
                print(stringdata == "red")

red

5
False

I want to check if the socket client sent a specific text, but I always get false even though I type red

[trim moth]

The text we see is just red while the lenght of that strinf as it says is 5 and we know that the word "red" is 3 characters long

so i suspect there being some spaces or something around

[gusty dawn]

Yeah I also tried .replace(" ", "") but that didn't work either

[trim moth]

so try looking at the output of print(list(stringdata))

[gusty dawn]

Oh I also tried replacing \n but there is also a \r

[trim moth]

oh, why is there a newline after the word red in the output

[trim moth]

oh

try .strip()

[gusty dawn]

Ok now its working thanks a lot

[trim moth]

lol what was wrong lmao

[gusty dawn]

Yeah

[trim moth]

lol

[trim moth]

What was going wrong?

[gusty dawn]

['r', 'e', 'd', '\r', '\n']

[trim moth]

lol noice

[light zealot]

https://stackoverflow.com/questions/67596766/how-could-we-establish-connection-between-server-and-client-through-socket-progr/67597468#67597468

For people who want to establish connection between client and the server on different networks without setting up port forwarding

[trim moth]

noice

[radiant vortex]

Hi, I’m looking for some python code/library that can be used with a console cable

Could anyone help?

I need to get outputs such as a vlans list etc, from a layer 2 Cisco switch

[dry lotus]

sorry im not good enoff to help

um but how do you send a message to all clients online

im trying to create a terminal texting thing

#!/usr/bin/python

import socket
import threading
import json

def main():
    IPv4 = socket.gethostbyname(socket.gethostname())

    server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server.bind((IPv4, 5050))

    server.listen()

    print(f'Servers local ip: {IPv4}')

    while True: 
        connection, ip_address = server.accept()
        print(f"Connection was gotten from {ip_address}")

        connection.send("You are now connected to the server!".encode())

        user = connection.recv(1024).decode()

        while True:
            try:
                message = connection.recv(1024).decode()
                if message.lower() == "stop":
                    break
                else:
                    print(f"{user}: {message}")
                    # Here i want to add a thing where i can send messages to each client. 
            except:
                ...

        connection.send("Thank you for connecting!".encode())
        connection.close()

if __name__ == '__main__':
    main()

[light zealot]

You can create a list and append different clients to it and then you can simply use a for loop to broadcast the message

clients = []

#[....]
def broadcast(msg):
    for client in clients:
        client.send(msg)
while True:
    connection, ip_address = server.accept()
    clients.append(connection)

    if msg_recvied_from_client:
        broadcast(msg)

[dry lotus]

oh right that works

ty

[light zealot]

👍

🤦

[dry lotus]

lol

[restive tapir]

How do i stop windows service from answer to packets that comes into a specific port that the port is closed?

for example in linux i can use
"sudo iptables -A OUTPUT -p tcp --tcp-flags RST RST --sport 80 -j DROP"
to stop getting answer from the os

[naive dragon]

yo

[trim moth]

yo

[whole rapids]

I have a question on port forwarding

Can you chain the ports ?

Like listening on 5000 which will redirect you to 7907 which will redirect you to 5468 and so on

Just wondering if it was possible

[prisma cobalt]

its kinda possible

[dry lotus]

#!/usr/bin/python

import socket 
from threading import Thread

class main:
    def __init__(self):
        self.server = socket.socket()
        self.host = "192.168.86.62"

    def main(self):
        self.server.connect((self.host, 5050))
        print(self.server.recv(1024).decode())

        self.user = (input("Give your self a name: ")).replace(' ', '')

        (Thread(target = self.recive)).start()
        (Thread(target = self.announce)).start()

        self.server.close()

    def recive(self):
        while True:
            try:
                print(self.server.recv(1024).decode())
            except:
                ...

    def announce(self):       
        while True:
            message = input(f"{self.user}: ")
            self.server.send(f"{self.user}: {message}".encode())
            if message.lower == "stop":
                break



if __name__ == "__main__":
    main().main()

OSError: [WinError 10038] An operation was attempted on something that is not a socket```

im not sure what i did wrong here, it was working previously but now its not working at all

also for some reason my server is only able to handle one client when i really want multiple clients being able to talk to each other

sorry if its a dumb question. im kinda new to sockets lol

[simple geyser]

HI

pls I need a hand

selenium.common.exceptions.WebDriverException: Message: unknown error: cannot find Chrome binary

[sullen breach]

can someone help me in #help-cheese

[gloomy forum]

show some code

I have a question.

Suppose I have a Vuejs (frontend) and a Django (backend) application. I want to deploy them on a single server, such that when I send request to http://example.com, I can reach the Vuejs server and when I send request to http://api.example.com, I can see the django server. Is this possible via Nginx?

If yes, how would I go about doing it? Can someone please show the relevant docs, since I don't know what to look for.

[dusty blade]

i really dont know but as i understand it a single page application is one thing and the server is another and i think is like react which runs as a spa

i think vue*

[gloomy forum]

Actually I am using nuxtjs which is a server side framework. https://nuxtjs.org/

[dusty blade]

ohh

server side rendering

its like django and next.js?

[gloomy forum]

yes

nuxt is to vue what next is to react

[dusty blade]

nice

so why are u using django

or is it like built on top

of django

that framework

[gloomy forum]

no no

[dusty blade]

ohh its nodejs

lol

[gloomy forum]

nuxtjs is the frontend. It consumes the django api

they are completely decoupled and independent

[dusty blade]

the other day i was applying for a job and saw nuxt.js and i thought it was next.js haha

thought prob a typo its highly unlikely something is named nuxt

if next exists

[gloomy forum]

haha

[dusty blade]

but now i c

[gloomy forum]

it exists very much

and its really cool too

[dusty blade]

btw how is django vs nodejs

for pure backend

ive just used nodejs express

[gloomy forum]

i have used both. id say django is much better

[dusty blade]

really?

why

[gloomy forum]

but its personal opinion really

i for one like python much more than js

[dusty blade]

yea me 2

but i know js so well

[gloomy forum]

django comes with a lot of stuff out of the box. express doesnt

i will admit that I have not used backend js framework like adonis etc but i have never needed to

if i need a backend then django it is

no questions

[wide path]

Guys, is there a more active place to ask about networking-related questions. I have asked before without any luck, my question for anyone wondering. I have two raspberry pi's that are going to connected wireless using UDP. Pi A is connected to a temp sensor, and pi B has 2 LEDs connected. The requirement for this to work is that LED 1 has to turn on within 2 seconds after the measured temperature exceeds a pre-set threshold, LED 2 is turned on within 1s If temperature continues at the same level for more than 5s. My option is to choose a timed trigger or event trigger or lastly a mix solution. My first problem is to decide if I want the control system to be in A or B or have it in both, my explanation is that because it is a small system and pi A is constantly reading data from the temp, it should be the one controlling the pi B, but I might be wrong entirely, and it should be that both control the system to handle packet loss eventually. My second problem is I don't know what solution to pick from as I said before, it is a small system, and I don't see any benefit of going event over timed trigger and worse, why I should even consider a mixed solution at all. My reasoning for going a timed trigger solution is that it is easy to calculate and you know before hand when the data is going to be sent

[dusty blade]

i mean udp sound like the correct option

let me try to read again what u posted lol so long

need to parse that through

[wide path]

I dont know how to post text and make it look good. I could post in a code making it maybe more readable

[gloomy forum]

just split it up into paragraphs

[dusty blade]

an event trigger

i would use

there is a design pattern for that

gimme a sec

the observer pattern

: )

i think that is the solution

[dusty blade]

sounds fun that project btw

[wide path]

@dusty blade so you are saying an event trigger is a good choice in a system like this, but what are the upside of going event over timed ?

[dusty blade]

is adonis like more sophisticated?

[dusty blade]

https://www.youtube.com/watch?v=_BpmfnqjgzQ watch this video

here is concept

and the implementation

it is like the exact problem you have lol

[dusty blade]

and btw with that pattern you can implement it via tcp which reliable and the function will only get called when the threshold occurs

which is more reliable*

the approach you were onto was like a brute force approach

this is more elegant

[wide path]

@dusty blade sadly I cant use tcp, but lets say that I go with an event trigger where lets say that if the temp is over 40c it sends data, will it not be a problem if the temp stays at 40c?

[dusty blade]

the problem with udp is how are you going to be certain the data arrives

it does not come with a guarantee

[wide path]

yeah I know

[dusty blade]

like tcp

[wide path]

going to sue acknowledgment

[dusty blade]

and send until an ack arrives?

keep sending until an ack arrives?

that sounds good

[wide path]

yeah, but will the event trigger cause me a problem where it barrages the other system with data? I might be wrong but I did some testing in packet tracer and it just spammed the other pi, honestly that one of the reason to why I was thinking a timed trigger would work given that it is just pi A and B and ofc it would cause problems if there are many more Pi's connected as it would have to update all the other pi's even if the data is not relevant.

[gloomy forum]

Not sure never used it. I've only heard that Adonis is to Javascript what Django is to python.

[dusty blade]

nope it wont happen

it will stop calling the method once the ack arrives

let me put it this way: the pi which is connected to the sensor will call the method notify subscribers once the temperature gets to a certain level

[wide path]

@dusty blade yeah ok,.do you know any benefit for using a mix of both in my system because I cant come up with anything on my own

[dusty blade]

and the only subscriber is the other pi

i mean i can help

whats your code

do u have a repo

[wide path]

I just have concepts in packet tracer, and no code on the pi's get, because I feel like it I need to design and then implement and I want to be sure that I am not missing anything before starting

[dusty blade]

i rly think were good to go with that idea

why did u say we cant use tcp btw?

is it like a framework were attached to?

or something?

[wide path]

the LED's are for testing

[ember lance]

Can I hack nasa using html

🙁

[wide path]

yeah you have to delete that system folder ah I dont remember the name

@dusty blade the project is like a group thing and one of them said that mix is the better solution because we use the best of the two

[ember lance]

🇰 🇴

[dusty blade]

i mean to call the method every other time

its not a bad idea

bots methods will work

both

like keep the timer method as a safeguard

i guess it doesnt hurt

[wide path]

let me remember what he said: we read data from the sensor every time so the data is always updated and then there no reason to send that data if it is not relevant so we send first package and then every 1 min send the others or something like that

[dusty blade]

we read data from the sensor every time so the data is always updated and then there no reason to send that data if it is not relevant

this part i agree

but you only want to notify the other raspberry when a certain event occurs

so he can trigger whatever he wants

right?

in this case when the temperature reaches 40 degrees

the part that doesnt make sense to me is notifying raspberry b about something which is not relevant to the other raspberry

[wide path]

more like this if d>40 send package and then if above is true send the data every 1min

[dusty blade]

why every 1 min

cant u just do like

when data goes below 40

send the other event

like one event for 40 and up

and other event for 39 down

light on for 40 up

light off for 39 down

[wide path]

yeah, but the condition is that if the temp stays above 40c for more than 5s the other LED needs to be up within 1s of reading that data

[dusty blade]

remember we have a certainty the packages will arrive because rasp A will not stop calling the method until B acknowledges

and rasp a will call the method after the temp mantains at 40c for 5 seconds

[wide path]

and his reason for 1 min is that it takes around 1 min for change in the temp

[dusty blade]

it doesnt matter how much it take for the sensor to read the input

as soon as he gets the next read below 40 he will inform again

raspberry b

and if temp comes back up to 40 for 5 seconds he will inform again

raspberry b knows nothing except the last temperature

or in this case the last threshold

[wide path]

ok, so A sends the temp data to B, and then in A if the temp is still at 40c for more than 5s it sends another data to B to inform it right ?

[dusty blade]

it doesnt need to

because it is still at 40

if he has not received the other signal is because the temperature has not dropped below 40

as soon as A reads the output from the sensor below 40 it will inform B

[wide path]

oh like that

[dusty blade]

and will not stop informing until B ack

[wide path]

but how is it then a mix of the 2 solution to me this sounds more like a event trigger

[dusty blade]

so

we just came up with the optimal

we dont need the mix

we just need the event based

[wide path]

yeah, but I am with you

[dusty blade]

i mean it does not hurt

to implement the timer too

its 10 more lines of code

but its unnecesary

its like taking a shower twice

you only need to bath once to be clean

[wide path]

ok, so to sum it finally A have 2 mods when it is 40c send data and when it is below 40c send data. Using a mix where we first send data at 40c and then send data in intervals of 1 min if the trigger event is true is pointless because we achieve the same results without the timed trigger. correct ?

[dusty blade]

Rasp "A" reads the output from signal every x time and when event "z" occurs he will call the method to inform rasp "B" and if event "Y" occurs he will call the other method to inform rasp B

[dusty blade]

correct

it would not make sense to nag rasp b over and over if nothing has changed

before the last time

rasp b only wants to get notified when something new comes up

he does not care about old news

[wide path]

I dont know if this will be enough to convince him, because I said at first that timed trigger was a good solution and it turns out I wasnt right at all

but I will try

[dusty blade]

i mean the timed trigger works

but this is the pro solution

lol

if u go to a crypto platform and notice how the price change interactively

it is this exact implementation

literally

imagine if the website get barraged every x miliseconds

it would crash

and the user experience would be unpleasent

unpleasant

not to mention the data compsumption

consumption*

[wide path]

is timed trigger solutions only good if the data is changing every x min/sec constantly and is relevant or would you say that event is still better?

[dusty blade]

it does not matter how frequently the data changes

rasp b only cares about 2 events

above 39

and below 40

it is rasp a job to inform rasp b for those 2 events

it does not matter if rasp a is receiving output from the sensor every x time

the sensor's job is to emit signals every time the temperature changes
rasp a job is to inform rasp b on those 2 events
rasp b job is to emit light on event a and turn off on event b

[wide path]

yeah in my system this should be the proper way, now if we say in more general way event trigger takes more processing power on the local machine because it needs to do some calculation and determine if a change is made first and this is one of the drawbacks, but because the processing power is almost 0 it really doesn't matter. I am trying to as you see argue my point so that we can be on the same page and start working with the hardware ofc he can still disagree, but it is a lot easier to do the work if everyone agrees

[dusty blade]

there is no calculation whatsoever

the calculation is

2 if statements

besides you are on a raspberry pi those things are like modern computers

faster than the fastest 1990 computer in the world prob

[wide path]

yeah that my point

[dusty blade]

the drawbacks are null

both approaches will work and for that project the timer method works and will not break anything

but if u are doing it might as well do it the prooper way

[wide path]

yeah

[dusty blade]

it takes the same effort to do it one way or another

besides you guys will understand a design pattern

which is called the subscriber

it is literally everywhere

on products you use daily

will help you a ton to understand it

because this is only the concept

you will learn a lot by doing the actual implementation

super super clean and elegant way

if u guys decide to go down that approach and are in desperate need of help feel free to send me a dm

and i will gladly help

[wide path]

ty will do if we get stuck, but it shouldn't be a problem with the lengthy explanation you have provided ty again

[dusty blade]

yup np

the observer pattern

write it down if u get stuck you can google and see some code

to watch the implementation

the concept you already have it

[wide path]

that video was amazing that guy is super clear with everything ty for the channel

[dusty blade]

anytime glad to help

gnight!

[wide path]

good night

[fossil pivot]

what would the alternative way to port forwarding so I can view my camera even when i am outside the network?

[prisma cobalt]

what do youi have against port forwarding?

in this case make a server with a static ip in between which both devices can connect to to talk

[fossil pivot]

ah i was thinking of some sort of like automatically setup of port forwarding for others
If I go with port forwarding I need to teach how to setup it in their router and I don't even know if it will work well

[prisma cobalt]

ah right, yeah what you probably need to do is create a server, this is what big home camera companies work

so the camera connects to server
the device connects to server

the server manages them speaking

[fossil pivot]

so i still need to setup a cloud server

[prisma cobalt]

yeah i think thats the best way

[dry lotus]

    def check_message(self):
        while True:
            for client in self.clients:
                #add a time limit so it can iterate through the users faster and make sure there is no
                message = client.recv(1024).decode()
                if not message:
                    ...
                else:
                    print(message)
                    #Tools().announce(message)  

im not really sure how to iterate through the clients faster and make sure the messages are comming constantly

like it waits for the other person to send their message then your message sends

[trim moth]

eh?

[trim moth]

i did'nt get the second one

[dry lotus]

it sends the message after hte other person sends a message

[trim moth]

you're receiving from every client

why would you do that?

[dry lotus]

cause i kinda want to create like a terminal group chat kinda thing

[trim moth]

yeah, ik

[dry lotus]

and im not sure how to do it, so i thought that would work

[trim moth]

i read the chat above

[dry lotus]

ohh right im getting the messages but the problem is it you cant send two messages in a row without it clogging up

i sent ok ok twice

it sends the first one then waits for the other person to send something then says ok

[trim moth]

oh

[dry lotus]

yeah thats the problem

i kinda want to create a timeout but idk how to do that with the time module

[trim moth]

umm, i think it's not clear to me

[dry lotus]

ok

@trim moth im just trying to cehck if each client has sent a message or not. cause the delay of someone not sending a message is kinda annoying

and if they havent sent a message in like 0.5 seconds then it just skips over them in the iteration

[prisma cobalt]

@dry lotus you could start a thread for each client?

[trim moth]

but you dont need to do that

[dry lotus]

if that explains it better

ok ig so

[trim moth]

tell me how is the architecture of the chat system in your mind

normally i wont imagine receiving data from each client in a chat room

[dry lotus]

ok so what i have is a thread where is constantly checks if someone has logged in and it also grabs their ipv4

[trim moth]

yeah

[dry lotus]

and stores it and stuff

the connection

[trim moth]

yeah, the socket object

[dry lotus]

yes

then i iterate through that to check if messages were sent

i should probably try creating a thread for each client like evorage said

[trim moth]

bruh. by architecture i did'nt mean this

like, server client interaction

[dry lotus]

you want the kode?

oh ok