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import socket
def isascii(s):
try:
s.decode("ascii")
except ValueError:
return False
return True
def cleanBin(s, fixspacing=False):
"""
Cleans binary data to make it safe to display. If fixspacing is True,
tabs, newlines and so forth will be maintained, if not, they will be
replaced with a placeholder.
"""
parts = []
for i in s:
o = ord(i)
if (o > 31 and o < 127):
parts.append(i)
elif i in "\n\t" and not fixspacing:
parts.append(i)
else:
parts.append(".")
return "".join(parts)
def hexdump(s):
"""
Returns a set of tuples:
(offset, hex, str)
"""
parts = []
for i in range(0, len(s), 16):
o = "%.10x" % i
part = s[i:i + 16]
x = " ".join("%.2x" % ord(i) for i in part)
if len(part) < 16:
x += " "
x += " ".join(" " for i in range(16 - len(part)))
parts.append(
(o, x, cleanBin(part, True))
)
return parts
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