TCP套接字编程（nltk语句分割）

实现了一个使用TCP相互通信的服务器和客户端程序。

该服务器提供了分配服务部分的语音标签，从客户端接收的句子，并将结果返回给客户端。

该客户端读取存储在一个文本文件，然后发送句子到服务器的英语句子。收到结果后，应打印到标准输出。

代码如下：

server.py

import socket
import sys
import nltk
import ssl
import json

ssl._create_default_https_context = ssl._create_unverified_context

nltk.download('punkt')
nltk.download('averaged_perceptron_tagger')

# get port numer from command line arguments
portNum = int(sys.argv[1])# should be 55703
# create an INET socket
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# bind the socket to the host and a port
server_socket.bind(("localhost", portNum))

# Listen for incoming connections from clients
server_socket.listen(10)

# A indefinite loop
while True:
    # accept connections from outside
    (client_socket, address) = server_socket.accept()
    print(("Listening for incoming connections on port ")+str(server_socket.getsockname()[1]))
    all_data = ""
    while True:
        # Read data from client and send it back
        data = client_socket.recv(2048)
        data = data.decode("utf-8")
        #if receive something,continue
        if(data != ""):
            print(("Client {0!s} is connected.").format(address[0]))
            #if receive [END],break
            if("[END]" in data):
                all_data = all_data + data
                break
            else:
                all_data = all_data + data      
        else:
            print("Connection failed.")

    if(len(all_data)):
        all_data = all_data.rstrip("[END]")
        print(all_data)
        tokens = nltk.word_tokenize(all_data)
        tagged = nltk.pos_tag(tokens)
        json_array = json.dumps(tagged)
        sendData = json_array.encode("utf-8")
        client_socket.sendall(sendData)
    else:
        print("No data received.")

    # Close the socket
    client_socket.close()
    print("Client disconnected.")

client.py

import socket
import ssl
import sys
import json

#import os
#size = os.path.getsize('sentence2.txt')
#print(size)

# get arguments from command line
hostName = sys.argv[1]
portNum = int(sys.argv[2])# should be 55703

filePath = sys.argv[3]

# create an INET TCP socket
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# connect to the server (change localhost to an IP address if necessary)
try:
    soc.connect(("localhost", portNum))
    print("Connected to server.")
    # Send messages to the server
    with open(filePath) as file:
        msg = file.read()
        msg = msg+"[END]"
        msg = msg.encode("utf-8")
        soc.send(msg)
    file.close()

except:
    print(("Cannot connect to server at {0!s},{0!s}").format(address,portNum))
    #raise Exception("Cannot connect to server at {0!s},{0!s}").format(address,portNum)

all_data = ""
while True:
    # Receive data from the server
    tagged = soc.recv(2048)
    string = tagged.decode("utf-8")
    if(string == ""):
        break
    else:
        all_data = all_data + string


json_array = json.loads(all_data)

item_str1 = ""
item_str2 = ""
for item in json_array:
    if(json_array.index(item) != len(json_array)-1):
        item_str1 = item_str1 + item[0] + " "+ ";" + " " 
    if(json_array.index(item) == len(json_array)-1):
        item_str1 = item_str1 + item[0]

for item in json_array:
    if(json_array.index(item) != len(json_array)-1):
        item_str2 = item_str2 + item[1] + " " + ";" + " "
    if(json_array.index(item) == len(json_array)-1):
        item_str2 = item_str2 + item[1]

print(item_str1)     
print(item_str2)


# Always close the socket after use
soc.close()