Styjun

The problem I'm running into is as follows:

I've built a multi-threaded TCP server using the socket module in Python (or at least, I've tried to). The server worked just fine in its single-threaded implementation, and seems to send the file just fine through the CLI when I'm using it with a client script that I've written, but when I use it with a browser, the files simply don't show up - the HTTP status message will come through (HTTP/1.0 200 OK or HTTP/1.0 404 File Not Found), but the file itself will not... or if it does, it doesn't show up in the browser.

If someone could take a look at my code and help me figure out what's going on, I would be very appreciative. Here is the main part of my code (I've omitted the import statements and the if dunder-name equals dunder-main part of the code...):

#Thread function:

def threaded(connectionSocket):

 while True:

 try:
 #Request received from client
 message = connectionSocket.recv(1024)

 #Create received time stamp
 recv_time = time.time()

 #If the request is coming from the CLI, do this:
 filename = message

 #If the request is coming from a browser, do this:
 if len(message.decode('utf-8')) > 20:
 #Parse message from client
 filename = message.split()[1]

 filename = filename.decode('utf-8')
 f = open('.' + filename, 'r')
 outputdata = f.read(1024)

 #Send HTTP 200 OK Response message
 connectionSocket.sendall(bytes("HTTP/1.0 200 OKn", "utf-8"))

 #Send data to client
 connectionSocket.sendall(outputdata.encode('utf-8'))

 #Display response to console
 print("HTTP/1.0 200 OK")

 #Create sent time stamp
 sent_time = time.time()
 break

 except:

 #Send response message for file not found
 connectionSocket.send(bytes('HTTP/1.0 404 File Not Found n', 'utf-8'))

 #Display to console
 print("HTTP/1.0 404 File Not Found")

 #Create time stamp
 sent_time = time.time()
 break

 #Calculate RTT
 rtt = round((sent_time - recv_time), 3)

 #Display RTT
 print("RTT: " + str(rtt) + "ms")

 #Close connection and release lock
 connectionSocket.close()
 data_lock.release()
 print("Lock Releasedn")

#The serve function which generates the server socket and initiates the thread

def serve():
 #Create a server socket
 serverSocket = socket(AF_INET, SOCK_STREAM)

 #Prepare a server socket
 HOST = '127.0.0.1'
 PORT = 50007
 serverSocket.bind((HOST, PORT))
 serverSocket.listen(5)

 while True:

 #Acquire lock
 data_lock.acquire()
 print("Lock acquired")
 print('Ready to serve...')

 #Establish the connection
 connectionSocket, addr = serverSocket.accept()
 print('Connected by ' + str(addr))

 #Start new thread
 start_new_thread(threaded, (connectionSocket,))
 break

 #Close this socket
 serverSocket.close()

#The main function:
def Main():
 while True:
 serve()

I feel like I'm probably missing something rather obvious, but I'm rather new to socket programming and multi-threading and all such as that. Any advice would be very helpful.

Thank you!