I'm having a problem with my code.
The connection should work but the server does not get anything, even though I'm sending data.
Could you check out my code and help me?
import socket
def inviare(ip,port):
file_name = raw_input("File name? ")
sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.connect((ip,port))
file_open = open(file_name,"r")
file_content = file_open.read()
print file_content
sock.send(file_content)
file_open.close()
sock.close()
def ricevere(ip,port):
sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
sock.bind((ip,port))
sock.listen(5)
while 1:
(connection, adress) = sock.accept()
try:
file_data = sock.recv(6000)
filewrite = open("Down.txt","w")
print file_data.read()
filewrite.write(file_data.readlines())
filewrite.close
except:
pass
def main():
command = raw_input("Send or receive? ");
if(command == "receive"):
ip = raw_input("Ip ")
port = input("Port ")
ricevere(ip,port)
elif(command == "send"):
ip = raw_input("Ip ?")
port = input("Port?")
inviare(ip,port)
if __name__ == '__main__':
main()
I have tried to run it in several machines and changed lots of things, but nothing happened. Same problem, but it does not output any error!
Inside ricevere you are trying to read from your server socket (sock) and not from the connected client connection.
Hence it raises: [Errno 107] Transport endpoint is not connected
(Which you can see if you don't pass the except-clause, but actually print the exception.)
You script runs as expected, when you change your try-block to:
file_data = connection.recv(6000)
filewrite = open("Down.txt","w")
print file_data
filewrite.write(file_data)
filewrite.close()
Related
So for some reason this code is not properly working for sending a zip folder from the client to server. on the server side if I use "f = zipfile.ZipFile("platformIO.zip")" I get the error "ValueError: stat: embedded null character in path", and if I use "f = open("platformIO.zip", "wb")" no error is thrown but the received file is corrupt and won't open.
I have read every similar to question to this and cannot find a solution.
Client:
import socket
import time
# Configure wireless connection with server (board on leg)
HOST = "192.168.4.1" # change to server ip address
PORT = 5005 # must be same as server
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
print("connected")
user_input = "startup"
while True:
if user_input == "startup":
# ask if user wants to send code
user_input = input("Do you want to send new code?: (y/n)")
if user_input == "y":
user_input = "send code"
elif user_input == "n":
user_input = input("Would you like to collect data?: (y/n)")
if user_input == "y":
user_input = "receive data"
else:
user_input = "startup"
else:
user_input == "startup"
elif user_input == "send code":
st = "sending code"
s.send(st.encode())
file = "platformIO.zip"
try:
with open(file, "rb") as f:
print("sending file...")
data = f.read()
s.sendall(data)
print("finished sending")
st = "finished"
s.send(st.encode())
user_input = "startup"
except:
print("Failed transfering <platformIO.zip>, make sure it exists")
st = "failed"
s.send(st.encode())
elif input =="receive data":
print("feature not yet implemented")
user_input == "startup"
# delay
time.sleep(0.1)
Server:
import socket
import time
import zipfile
import os
# create server
HOST = "192.168.4.1"
PORT = 5005
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print("socket created")
# managing error exception
try:
s.bind((HOST,PORT))
except socket.error:
print("bind Failed")
s.listen(1)
print("Socket awaiting mesesages")
(conn, addr) = s.accept()
print("connected")
# awaiting message
msg = "startup"
while True:
if msg == "startup":
# receive data from controller
msg = conn.recv(4096)
print(str(msg, 'utf-8'))
elif str(msg, 'utf-8') == "sending code":
f = zipfile.ZipFile("platformIO.zip", "w")
#f = open("platformIO.zip", "wb")
while True:
data = conn.recv(4096)
print(data)
if not data:
break
f.write(data)
print("file received")
msg = "startup"
time.sleep(.1)
conn.close()
edit: if I use f = open("platformIO.zip", "wb") and add s.close() inside the writing while loop of the server, I can receive the zip successfully, but then the connection closes and I can't open the zip file until I close the program
f = open("platformIO.zip", "wb")
while True:
data = conn.recv(4096)
print(data)
if not data:
break
f.write(data)
s.close()
I'm running a python script on a raspberry pi that reads keyboard input to a string and will be sending that string through TCP. I've made two script one that reads the input and one that can send the string if needed. How can i use one string and use it in both scripts for readings and writings?
I've used an text document. Only becaue of the sd card i wanne achieve an connecting between the two scripts
Reading part:
#loops for Barcode_Data
def Create_File():
file = open("Barcode_data.txt", "w")
file.write(" // ")
file.close()
empty = ''
def Barcode_Read():
Barcode_Data= input("Input: ",)
print(Barcode_Data)
file = open("Barcode_data.txt", "a")
file.write(Barcode_Data)
file.write(" // ")
file.close()
#Loop that will only run once
Create_File()
#Loop that will run continuesly
while True:
Barcode_Read()
TCP Server:
#TCP server
def TCP_Connect(socket):
socket.listen()
conn, addr = socket.accept()
with conn:
data = conn.recv(1024)
if data == b'Barcode_Data':
tcp_file = open("Barcode_data.txt", "r")
Barcode_Data = tcp_file.read()
tcp_file.close()
conn.sendall(Barcode_Data.encode('utf-8'))
elif data == b'Clear Barcode_Data':
tcp_file = open("Barcode_data.txt", "w")
tcp_file.write(" // ")
tcp_file.close()
#TCP Socket setup
HOST = '' # Standard loopback interface address (localhost)
PORT = 1025 # Port to listen on (non-privileged ports are > 1023)
import socket
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.bind((HOST, PORT))
#Loop that wil run continuesly
while True:
TCP_Connect(s)
You can use the code from this question as is: Interprocess communication in Python
Server process:
from multiprocessing.connection import Listener
address = ('localhost', 6000) # family is deduced to be 'AF_INET'
listener = Listener(address, authkey='secret password')
conn = listener.accept()
print 'connection accepted from', listener.last_accepted
while True:
msg = conn.recv()
# do something with msg
if msg == 'close':
conn.close()
break
listener.close()
Client process:
from multiprocessing.connection import Client
address = ('localhost', 6000)
conn = Client(address, authkey='secret password')
conn.send('close')
# can also send arbitrary objects:
# conn.send(['a', 2.5, None, int, sum])
conn.close()
Documentation is available here: https://docs.python.org/3.7/library/multiprocessing.html#multiprocessing-listeners-clients
Started to implement this project in C++, however I figured Python would be a better choice going forward for x-platform.
Goal here is to create a simple file server and then create a client. Client should be able to upload files to the server and download files from the server.
My code for the client is:
import socket
def Main():
host = '127.0.0.1'
port = 5000
s = socket.socket()
s.connect((host,port))
choice = raw_input("Upload or Download? (u/d):")
if choice == 'd':
filename = raw_input("File to Download? (q to quit): ")
if filename != 'q':
s.send(filename)
data = s.recv(1024)
if data[:6] == "EXISTS":
filesize = long(data[6:])
message = raw_input("File found on the server!," +str(filesize)+"bytes, continue with download? y/n:")
if message == "y":
s.send('OK')
f = open('new_'+filename, 'wb')
data = s.recv(1024)
totalRecv = len(data)
f.write(data)
while totalRecv < filesize:
data = s.recv(1024)
totalRecv += len(data)
f.write(data)
print ("Percentage Completed: "+"{0:.2f}".format((totalRecv/float(filesize))*100))
print ("File has been Downloaded!")
else:
print ("File doesnt exist!")
else:
filename = raw_input("File to Upload? (q to quit): ")
# if filename != 'q':
print ("Upload Function Coming Soon")
s.close()
if __name__ == '__main__':
Main()
The code for the server is:
import socket
import threading
import os
def RetrFile(name, sock):
filename = sock.recv(1024)
if os.path.isfile(filename):
sock.send("EXISTS" + str(os.path.getsize(filename)))
userResponse = sock.recv(1024)
if userResponse[:2] == 'OK':
with open(filename, 'rb') as f:
bytesToSend = f.read(1024)
sock.send(bytesToSend)
while bytesToSend != "":
bytesToSend = f.read(1024)
sock.send(bytesToSend)
else:
sock.send("ERR")
sock.close()
def Main():
host = "127.0.0.1"
port = 5000
s = socket.socket()
s.bind((host,port))
s.listen(5)
print ("Server Started")
while True:
c, addr = s.accept()
print ("Client Connected:") + str(addr) + ">"
t = threading.Thread(target=RetrFile, args=("retrThread", c))
t.start()
s.close()
if __name__ == '__main__':
Main()
I have it just fine for the download of the file, and thinking about it, I should be able to just reverse process for the upload portion of the client (instead of fetch the download, I basically copy the server part to perform the upload)...however I just cant seem to wrap my head around how to do so. I'm not worried at this point over the hard coded port etc---will fix that later, however does anyone have any suggestions going forward with this?
I need to emphasize that I am using python < v3 (I know--its old) however its a program limitation that I need to adhere to (hence the raw_input() v. input())
I'm trying to send and receive files through a TCP socket. When user types put abc.txt, abc.txt should be copied to the server.
When user types get def.txt, def.txt should be downloaded to the user computer. (Actually I have to implement 2 more methods - ls to list all files in the client directory and lls to list all files in the server, but I haven't done it yet.)
Here's the code
Server
import socket
import sys
HOST = 'localhost'
PORT = 3820
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.bind((HOST, PORT))
socket.listen(1)
while (1):
conn, addr = socket.accept()
print 'New client connected ..'
reqCommand = conn.recv(1024)
print 'Client> %s' %(reqCommand)
if (reqCommand == 'quit'):
break
#elif (reqCommand == lls):
#list file in server directory
else:
string = reqCommand.split(' ', 1) #in case of 'put' and 'get' method
reqFile = string[1]
if (string[0] == 'put'):
with open(reqFile, 'wb') as file_to_write:
while True:
data = conn.recv(1024)
if not data:
break
file_to_write.write(data)
file_to_write.close()
break
print 'Receive Successful'
elif (string[0] == 'get'):
with open(reqFile, 'rb') as file_to_send:
for data in file_to_send:
conn.sendall(data)
print 'Send Successful'
conn.close()
socket.close()
Client
import socket
import sys
HOST = 'localhost' #server name goes in here
PORT = 3820
def put(commandName):
socket.send(commandName)
string = commandName.split(' ', 1)
inputFile = string[1]
with open(inputFile, 'rb') as file_to_send:
for data in file_to_send:
socket.sendall(data)
print 'PUT Successful'
return
def get(commandName):
socket.send(commandName)
string = commandName.split(' ', 1)
inputFile = string[1]
with open(inputFile, 'wb') as file_to_write:
while True:
data = socket.recv(1024)
#print data
if not data:
break
print data
file_to_write.write(data)
file_to_write.close()
break
print 'GET Successful'
return
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.connect((HOST,PORT))
msg = raw_input('Enter your name: ')
while(1):
print 'Instruction'
print '"put [filename]" to send the file the server '
print '"get [filename]" to download the file from the server '
print '"ls" to list all files in this directory'
print '"lls" to list all files in the server'
print '"quit" to exit'
sys.stdout.write ('%s> ' %msg)
inputCommand = sys.stdin.readline().strip()
if (inputCommand == 'quit'):
socket.send('quit')
break
# elif (inputCommand == 'ls')
# elif (inputCommand == 'lls')
else:
string = inputCommand.split(' ', 1)
if (string[0] == 'put'):
put(inputCommand)
elif (string[0] == 'get'):
get(inputCommand)
socket.close()
There are several problems that I couldn't fix.
The program run correctly only on the first time (both 'put' and
'get' method). After that, All commands from the client can't be
sent to the server.
The 'get' method doesn't work for an image/photo file.
First problem is occurring because after handling one command, server is closing the connection.
conn.close()
Second problem is occurring because you are not reading all the data from the socket in client. At the end of while loop you have a "break" statement, due to which client is closing the socket just after reading 1024 bytes. And when server tries to send data on this close socket, its results in error on the server side.
while True:
data = socket1.recv(1024)
# print data
if not data:
break
# print data
file_to_write.write(data)
file_to_write.close()
break
There are two ways to fix this first issue.
Change the client so that for each command it creates a new connection & sends command to the server.
Change the server to handle multiple commands over the same connection.
Following code is the changed client to demonstrate the first way to fix the first issue. It also fixes the second issue.
import socket
import sys
HOST = 'localhost' # server name goes in here
PORT = 3820
def put(commandName):
socket1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket1.connect((HOST, PORT))
socket1.send(commandName)
string = commandName.split(' ', 1)
inputFile = string[1]
with open(inputFile, 'rb') as file_to_send:
for data in file_to_send:
socket1.sendall(data)
print 'PUT Successful'
socket1.close()
return
def get(commandName):
socket1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket1.connect((HOST, PORT))
socket1.send(commandName)
string = commandName.split(' ', 1)
inputFile = string[1]
with open(inputFile, 'wb') as file_to_write:
while True:
data = socket1.recv(1024)
# print data
if not data:
break
# print data
file_to_write.write(data)
file_to_write.close()
print 'GET Successful'
socket1.close()
return
msg = raw_input('Enter your name: ')
while(1):
print 'Instruction'
print '"put [filename]" to send the file the server '
print '"get [filename]" to download the file from the server '
print '"ls" to list all files in this directory'
print '"lls" to list all files in the server'
print '"quit" to exit'
sys.stdout.write('%s> ' % msg)
inputCommand = sys.stdin.readline().strip()
if (inputCommand == 'quit'):
socket.send('quit')
break
# elif (inputCommand == 'ls')
# elif (inputCommand == 'lls')
else:
string = inputCommand.split(' ', 1)
if (string[0] == 'put'):
put(inputCommand)
elif (string[0] == 'get'):
get(inputCommand)
I'd like to let more than one client connect to my server, and have the server send them different items. For example send "hi" to the first client and "goodbye" to the second . Here's my code:
Server
import socket
file_num = 0
inp = raw_input("Name of the wordlist file = ")
inp2 = input("Number of lines for every wordlist = ")
with open(inp) as in_file:
for line_num, line in enumerate(in_file):
print line_num
if not line_num % inp2:
file_num += 1
with open("out{0}.txt".format(file_num), "a") as out_file:
out_file.writelines(line)
def upload(host, port):
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind((host, port))
server_socket.listen(5)
filename = open("out1.txt", "rb")
print "Server Waiting for client on port ", port
while 1:
client_socket, address = server_socket.accept()
print "Connection from ", address
while 1:
for line in filename:
server_data = line
if server_data.lower() == 'q':
client_socket.send(server_data)
client_socket.close()
break
else:
client_socket.send(server_data)
client_data = client_socket.recv(1024)
if client_data.lower() == 'q':
print "Quit from client"
client_socket.close()
break
else:
print "<-- client: ", client_data
break
upload("localhost", 4000)
and then my client program
Client
import socket
port = 4000
host_server = "localhost"
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect((host_server, port))
z = 1
print "Type 'Q' or 'q' to QUIT"
f = open("pino.txt", "w")
while 1:
server_data = client_socket.recv(1024)
f.writelines(server_data)
if server_data.lower() == 'q':
print "Quit from server"
client_socket.close()
break
else:
print "<-- server: ", server_data
client_data = ("Sent "+str(z))
z = z+1
if client_data.lower() != 'q':
client_socket.send(client_data)
else:
client_socket.send(client_data)
client_socket.close()
break
f.close()
Hope you give me the solution cause this will be cool if it works, another thing I'd like for this program is if the filename under def upload would change for every client. For example the first client will get out1 and the 7th will get out7. Thanks in advance.
P.S. I'm new to python so if you could explain me what you changed it would be great, don't ask me to use Twisted cause Id like to do this with the normal python socket .
I've had this problem myself :-)
So what you're trying to do is have multiple connections, however usually socket uses the main thread, making it hard to have more than one connection.
To fix this we need to use something called Threading, it allows you to surpass operations onto other threads. So you need to create a new thread when every connection is made:
import socket
from _thread import *
file_num = 0
inp = raw_input("Name of the wordlist file = ")
inp2 = input("Number of lines for every wordlist = ")
with open(inp) as in_file:
for line_num, line in enumerate(in_file):
print line_num
if not line_num % inp2:
file_num += 1
with open("out{0}.txt".format(file_num), "a") as out_file:
out_file.writelines(line)
def upload(host, port):
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind((host, port))
server_socket.listen(5)
filename = open("out1.txt", "rb")
print "Server Waiting for client on port ", port
while 1:
client_socket, address = server_socket.accept()
print "Connection from ", address
while 1:
for line in filename:
server_data = line
if server_data.lower() == 'q':
client_socket.send(server_data)
client_socket.close()
break
else:
client_socket.send(server_data)
client_data = client_socket.recv(1024)
if client_data.lower() == 'q':
print "Quit from client"
client_socket.close()
break
else:
print "<-- client: ", client_data
break
start_new_thread(upload, ("localhost", 4000))
#NOTICE!!! If this line doesn't work ^^^
#Then replace it with:
#thread.start_new_thread(upload, ("localhost", 4000))
Hope this helps! :-)
Please tell me if it doesn't,
for I have not tested this, I've just done it before :)
Thanks,
~Coolq