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所属分类:Python
bad:
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.settimeout(2)
s.connect((ip_address,80))
byte = str.encode("Server:\r\n")
s.send(byte)
banner = s.recv(1024)
print(banner)
OK:
import socketdef http_banner_grabber(ip, port=80, method="HEAD",
timeout=60, http_type="HTTP/1.1"):
assert method in ['GET', 'HEAD']
# @see: http://stackoverflow.com/q/246859/538284
assert http_type in ['HTTP/0.9', "HTTP/1.0", 'HTTP/1.1']
cr_lf = '\r\n'
lf_lf = '\n\n'
crlf_crlf = cr_lf + cr_lf
res_sep = ''
# how much read from buffer socket in every read
rec_chunk = 4096
s = socket.socket()
s.settimeout(timeout)
s.connect((ip, port))
# the req_data is like 'HEAD HTTP/1.1 \r\n'
req_data = "{} / {}{}".format(method, http_type, cr_lf)
# if is a HTTP 1.1 protocol request,
if http_type == "HTTP/1.1":
# then we need to send Host header (we send ip instead of host here!)
# adding host header to req_data like 'Host: google.com:80\r\n'
req_data += 'Host: {}:{}{}'.format(ip, port, cr_lf)
# set connection header to close for HTTP 1.1
# adding connection header to req_data like 'Connection: close\r\n'
req_data += "Connection: close{}".format(cr_lf)
# headers join together with `\r\n` and ends with `\r\n\r\n`
# adding '\r\n' to end of req_data
req_data += cr_lf # the s.send() method may send only partial content.
# so we used s.sendall()
s.sendall(req_data.encode())
res_data = b''
# default maximum header response is different in web servers: 4k, 8k, 16k
# @see: http://stackoverflow.com/a/8623061/538284
# the s.recv(n) method may receive less than n bytes,
# so we used it in while.
while 1:
try:
chunk = s.recv(rec_chunk)
res_data += chunk except socket.error:
break
if not chunk:
break
if res_data:
# decode `res_data` after reading all content of data buffer
res_data = res_data.decode()
else:
return '', ''
# detect header and body separated that is '\r\n\r\n' or '\n\n'
if crlf_crlf in res_data:
res_sep = crlf_crlf elif lf_lf in res_data:
res_sep = lf_lf # for under HTTP/1.0 request type for servers doesn't support it
# and servers send just send body without header !
if res_sep not in [crlf_crlf, lf_lf] or res_data.startswith('<'):
return '', res_data # split header and data section from
# `HEADER\r\n\r\nBODY` response or `HEADER\n\nBODY` response
content = res_data.split(res_sep)
banner, body = "".join(content[:1]), "".join(content[1:])
return banner, body
Demo:
addresses = {'google.com': '216.239.32.20',
'msdn.microsoft.com': '157.56.148.19',}for domain, ip in addresses.items():
banner, body = http_banner_grabber(ip)
print('*' * 24)
print(domain, ip, 'HEAD HTTP/1.1')
print(banner)
Also you can try it with GET method and also other options:
for domain, ip in addresses.items():
banner, body = http_banner_grabber(ip, method="GET", http_type='HTTP/0.9')
print('*' * 24)
print(domain, ip, 'GET HTTP/0.9')
print(banner)
Output (first example):
************************google.com 216.239.32.20 HEAD HTTP/1.1HTTP/1.1 200 OKDate: Mon, 31 Mar 2014 01:25:53 GMTExpires: -1Cache-Control: private, max-age=0Content-Type: text/html; charset=ISO-8859-1Set-Cookie: **** it was to long line and removed ****P3P: **** it was to long line and removed ****Server: gws X-XSS-Protection: 1; mode=block X-Frame-Options: SAMEORIGINConnection: close************************msdn.microsoft.com 157.56.148.19 HEAD HTTP/1.1HTTP/1.1 301 Moved PermanentlyContent-Length: 0Location: http://157.56.148.19/en-us/default.aspxServer: Microsoft-IIS/8.0P3P: **** it was to long line and removed ****X-Powered-By: ASP.NET X-Instance: CH104Date: Mon, 31 Mar 2014 01:25:53 GMTConnection: close
Output (second example):
msdn.microsoft.com 157.56.148.19 GET HTTP/0.9HTTP/1.1 400 Bad RequestContent-Type: text/html; charset=us-asciiServer: Microsoft-HTTPAPI/2.0Date: Mon, 31 Mar 2014 01:27:13 GMTConnection: closeContent-Length: 311************************google.com 216.239.32.20 GET HTTP/0.9HTTP/1.0 400 Bad RequestContent-Type: text/html; charset=UTF-8Content-Length: 1419Date: Mon, 31 Mar 2014 01:27:14 GMTServer: GFE/2.0
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