Re: Hashcash

[Aaron Toponce]

On Sun, Mar 27, 2011 at 02:59:12PM -0600, Aaron Toponce wrote:
> original = sys.stdin.readlines()
> email = StringIO.StringIO(''.join(original))
> message = rfc822.Message(email)
>
> # ... snip several lines of code ...
>
> for line in original:
> if len(line) == 1 and len(token_status) > 0:
> print
> for status in token_status:
> print status
> token_status = []
> else:
> print line,

Somehow, the code lost its formatting, and I forgot to attach the Python
script. Let's try this again:

    # converting a list to a file-type object for parsing rfc822 headers
    original = sys.stdin.readlines()
    email = StringIO.StringIO(''.join(original))
    message = rfc822.Message(email)

    # ... snip ...

    # reprint the original mail, as well as the status of the hashcash check
    for line in original:
        if len(line) == 1 and len(token_status) > 0:
            print
            for status in token_status:
                print status
            token_status = []
        else:
            print line,

Thanks again.

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#!/usr/bin/env python

import rfc822
import StringIO
import subprocess
import sys

tokens = []
token_status = []

# converting a list to a file-type object for parsing rfc822 headers
original = sys.stdin.readlines()
email = StringIO.StringIO(''.join(original))
message = rfc822.Message(email)

# check for the presence of "X-Hashcash" and "Hashcash" headers
if message.has_key("X-Hashcash"):
    for list in message.getheaders("X-Hashcash"):
        tokens.append(list)
if message.has_key("Hashcash"):
    for list in message.getheaders("Hashcash"):
        tokens.append(list)

# check each token
if len(tokens) > 0:
    for token in tokens:
        bits = token.split(":")[1]
        resource = token.split(":")[3]
        token_status.append(subprocess.call("hashcash -cdb %s -r %s -f /home/aaron/.mutt/hashcash.db %s" % (bits,resource,token), shell=True, stdout=subprocess.PIPE))

# reprint the original mail, as well as the status of the hashcash check
for line in original:
    if len(line) == 1 and len(token_status) > 0:
        print
        for status in token_status:
            print status
        token_status = []
    else:
        print line,

#subprocess.Popen("less", shell=True)

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