#!/usr/bin/python

"""Example script for SFTP read"""

from __future__ import print_function

import argparse

import socket

import os

import pwd

import sys

from datetime import datetime

from ssh2.session import Session

from ssh2.sftp import LIBSSH2_FXF_READ, LIBSSH2_SFTP_S_IRUSR

USERNAME = pwd.getpwuid(os.geteuid()).pw_name

parser = argparse.ArgumentParser()

parser.add_argument('file', help="File to read")

parser.add_argument('--host', dest='host',

default='localhost',

help='Host to connect to')

parser.add_argument('--port', dest='port', default=22, help="Port to connect on", type=int)

parser.add_argument('-u', dest='user', default=USERNAME, help="User name to authenticate as")

def main():

args = parser.parse_args()

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

sock.connect((args.host, args.port))

s = Session()

s.handshake(sock)

s.agent_auth(args.user)

sftp = s.sftp_init()

now = datetime.now()

print("Starting read for remote file %s" % (args.file,))

with sftp.open(args.file, LIBSSH2_FXF_READ, LIBSSH2_SFTP_S_IRUSR) as fh:

for size, data in fh:

pass

print("Finished file read in %s" % (datetime.now() - now,))

if __name__ == "__main__":

main()