#!/usr/bin/env python
# -*- coding: utf-8 mode: python -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8

u"""Ce script est prévu pour être utilisé dans un script CGI.

Il permet de lister les paramètres du formulaire et d'y accéder depuis un script bash
"""

import re, cgi

RE_NAME_VALUE = re.compile(r'([a-zA-Z0-9_-]+)(?:=(.*))?$')

def quote(value, q=False):
    if value or q:
        value = "'%s'" % value.replace("'", "'\\''")
        value = re.sub(r"(?<!\\)''", "", value)
        return value
    else: return ""
    
def print_scalar(name, value):
    print "%s=%s" % (name, quote(value))

def print_array(name, values):
    print "%s=(" % name
    for value in values:
        print quote(value, True)
    print ")"

def run_cgiparams():
    from optparse import OptionParser
    OP = OptionParser(usage=u"\n\t%prog [options] params...", description=__doc__)
    o, args = OP.parse_args()

    form = cgi.FieldStorage(keep_blank_values=True)
    if args:
        for nv in args:
            mo = RE_NAME_VALUE.match(nv)
            if mo is None: continue
            fname, defvalue = mo.group(1), mo.group(2)
            if defvalue is None: defvalue = ''
            vname = fname.replace('-', '_')
            values = form.getlist(fname)
            if len(values) == 0: print_scalar(vname, defvalue)
            elif len(values) == 1: print_scalar(vname, values[0])
            else: print_array(vname, values)
    else:
        for fname in form.keys():
            vname = fname.replace('-', '_')
            values = form.getlist(fname)
            if len(values) == 1: print_scalar(vname, values[0])
            else: print_array(vname, values)

if __name__ == '__main__':
    run_cgiparams()