連接到FTP的Python套接字沒有收到我期望的內容

Question

我正在使用python套接字連接到ftp.rediris.es，並且在發送數據後我沒有收到我期望的答案。我用我的代碼和答案更好地解釋這一點： 這是我的代碼（test.py）

#!/usr/bin/env python 

import socket 

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 

print "Socket Created" 

port = 21 

host = "ftp.rediris.es" 

ip = socket.gethostbyname(host) 

print ip 

print "ip of " +host+ " is " +ip 

s.connect ((ip, port)) 

print "Socket Connected to "+host+" on ip "+ ip 

message = "HELP\r\n" 

s.sendall(message) 

reply = s.recv(65565) 

print reply 

這是答案，當我運行代碼：

python test.py 
Socket Created 
130.206.1.5 
ip of ftp.rediris.es is 130.206.1.5 
Socket Connected to ftp.rediris.es on ip 130.206.1.5 
220- Bienvenido al FTP anónimo de RedIRIS. 
220-Welcome to the RedIRIS anonymous FTP server. 
220 Only anonymous FTP is allowed here 

這是我所期望：

telnet 
telnet> open ftp.rediris.es 21 
Trying 130.206.1.5... 
Connected to zeppo.rediris.es. 
Escape character is '^]'. 
220- Bienvenido al FTP anónimo de RedIRIS. 
220-Welcome to the RedIRIS anonymous FTP server. 
220 Only anonymous FTP is allowed here 
HELP 
214-The following SITE commands are recognized 
ALIAS 
CHMOD 
IDLE 
UTIME 

我試圖此端口80朝向www.google.com上，發送一個GET/HTTP/1.1 \ r \ n \ r \ n和完全看到的報頭。 會發生什麼？我是不是將命令發送給服務器？謝謝你在前進

Answer 1

您可以檢查的220 Only anonymous FTP is allowed here最後一行已在telnetlib發送HELP消息，像read_until之前收到。

這個樣子，這對我的作品：

import socket 

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
print "Socket Created" 
port = 21 
host = "ftp.rediris.es" 
ip = socket.gethostbyname(host) 

print ip 
print "ip of " +host+ " is " +ip 

s.connect ((ip, port)) 
print "Socket Connected to "+host+" on ip "+ ip 

reply = '' 
while True: 
    message = "HELP\r\n" 
    reply += s.recv(1024) 
    if not reply: 
     break 
    if '220 Only anonymous FTP is allowed here' in reply: 
     s.sendall(message) 
     break  
reply += s.recv(65535) 
print reply 

打印輸出：

Socket Created 
130.206.1.5 
ip of ftp.rediris.es is 130.206.1.5 
Socket Connected to ftp.rediris.es on ip 130.206.1.5 
220- Bienvenido al FTP anónimo de RedIRIS. 
220-Welcome to the RedIRIS anonymous FTP server. 
220 Only anonymous FTP is allowed here 
214-The following SITE commands are recognized 
ALIAS 
CHMOD 
IDLE 
UTIME 
214 Pure-FTPd - http://pureftpd.org/ 

這就是說，雖然，不能完全肯定，爲什麼你沒有選擇更適合的模塊，如ftplib或telnetlib到首先。