pyparsing: how to negate a grammar

[knguyen]

Hi,

I want to define a rule for a line that does NOT start with a given
Literal. How do I do that? I try the following and my program just hang
there:

BodyLine = ~Literal("HTTP/1.1") + restOfLine

Thanks,
Khoa

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Re: pyparsing: how to negate a grammar

[knguyen]

Hi Paul,

I am trying to extract HTTP response codes  from a HTTP page send from
a web server.  Below is my test program. The program just hangs.

Thanks,
Khoa
##

#!/usr/bin/python

from pyparsing import   ParseException, Dict, CharsNotIn,
Group,Literal,Word,ZeroOrMore,OneOrMore,
Suppress,nums,alphas,alphanums,printables,restOfLine


data = """HTTP/1.1 200 OK
body line some text here
body line some text here
HTTP/1.1 400 Bad request
body line some text here
body line some text here

HTTP/1.1 500 Bad request
body line some text here
body line some text here
"""

print "="
print data
print "="

HTTPVersion = (Literal("HTTP/1.1")).setResultsName("HTTPVersion")
StatusCode = (Word(nums)).setResultsName("StatusCode")
ReasonPhrase = restOfLine.setResultsName("ReasonPhrase")
StatusLine = Group(HTTPVersion + StatusCode + ReasonPhrase)

nonHTTP = ~Literal("HTTP/1.1")
BodyLine = Group(nonHTTP + restOfLine)
Response = OneOrMore(StatusLine + ZeroOrMore(BodyLine))
respFields = Response.parseString(data)
print respFields

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Sending hex number as is

[knguyen]

This question may be ased before, but I couldn't find the answer
searching the archive.

Basically, I just want to send a hex number from one machine to the
next:

for example

msg = "Length is "
n = '\x81'
msg += n
sock.send(msg)

The problem is n's value is not fixed. For example,

msg = "Length is "
n = len(somestring)
msg += n  # This won't work of course, since n is int

How do I send this msg + n?

Thanks,
Khoa

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Httplib request method

[knguyen]

Hi,

For some reason, httplib request() method splits the request packet
into two packets, the first packet contains only HTTP headers, the body
in the second packet. The first packet size is way below the MTU size.
Is there a way I can send everything in one packet? Below is a piece of
my code:

self.conn.request(method, url, msg, headers)
response = self.conn.getresponse()
data = response.read()

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