##############################################################################
# 
# Zope Public License (ZPL) Version 1.0
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# This software consists of contributions made by Digital Creations and
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##############################################################################
"""
FTP Request class for FTP server.

The FTP Request does the dirty work of turning an FTP request into something
that ZPublisher can understand.
"""

from ZPublisher.HTTPRequest import HTTPRequest

from cStringIO import StringIO
import os
from regsub import gsub
from base64 import encodestring
import string

class FTPRequest(HTTPRequest):

    def __init__(self, path, command, channel, response, stdin=None,
                 environ=None):
        if stdin is None: stdin=StringIO()
        if environ is None:
            environ=self._get_env(path, command, channel, stdin)
        self._orig_env=environ
        HTTPRequest.__init__(self, stdin, environ, response, clean=1)
        
        # support for cookies and cookie authentication
        self.cookies=channel.cookies
        if not self.cookies.has_key('__ac') and channel.userid != 'anonymous':
            self.other['__ac_name']=channel.userid
            self.other['__ac_password']=channel.password
        for k,v in self.cookies.items():
            if not self.other.has_key(k):
                self.other[k]=v
        
   
    def retry(self):
        self.retry_count=self.retry_count+1
        r=self.__class__(stdin=self.stdin,
                         environ=self._orig_env,
                         response=self.response.retry(),
                         channel=self, # For my cookies
                         )
        return r
    
    def _get_env(self, path, command, channel, stdin):
        "Returns a CGI style environment"
        env={}
        env['SCRIPT_NAME']='/%s' % channel.module
        env['REQUEST_METHOD']='GET' # XXX what should this be?
        env['SERVER_SOFTWARE']=channel.server.SERVER_IDENT
        if channel.userid != 'anonymous':
            env['HTTP_AUTHORIZATION']='Basic %s' % gsub('\012','',
                    encodestring('%s:%s' % (channel.userid, channel.password)))
        env['SERVER_NAME']=channel.server.hostname
        env['SERVER_PORT']=str(channel.server.port)
        env['REMOTE_ADDR']=channel.client_addr[0]
        env['GATEWAY_INTERFACE']='CGI/1.1' # that's stretching it ;-)
       
        # FTP commands
        #
        if type(command)==type(()):
            args=command[1:]
            command=command[0]
        if command in ('LST','CWD','PASS'):
            env['PATH_INFO']=self._join_paths(channel.path, 
                                              path, 'manage_FTPlist')
        elif command in ('MDTM','SIZE'):
            env['PATH_INFO']=self._join_paths(channel.path, 
                                              path, 'manage_FTPstat')
        elif command=='RETR':
            env['PATH_INFO']=self._join_paths(channel.path, 
                                              path, 'manage_FTPget')
        elif command in ('RMD','DELE'):
            env['PATH_INFO']=self._join_paths(channel.path, 
                                              path, 'manage_delObjects')
            env['QUERY_STRING']='ids=%s' % args[0]
        elif command=='MKD':
            env['PATH_INFO']=self._join_paths(channel.path, 
                                              path, 'manage_addFolder')
            env['QUERY_STRING']='id=%s' % args[0]
        elif command=='STOR':
            env['PATH_INFO']=self._join_paths(channel.path, path)
            env['REQUEST_METHOD']='PUT'
            env['CONTENT_LENGTH']=len(stdin.getvalue())
        else:
            env['PATH_INFO']=self._join_paths(channel.path, path, command)
        return env
    
    def _join_paths(self,*args):
        path=apply(os.path.join,args)
        path=os.path.normpath(path)
        if os.sep != '/':
            path=string.replace(path,os.sep,'/')
        return path
        






