python pass variables with wget and check result

Question

im so new to python im try to pass variables with Wget

code:

USERID = 201        
RES = os.system("wget http://localhost/ -O /usr/setting.txt")
if RES == error:
 print RES
else
 print 'good'

what i need to pass is

http://localhost/?userid=203 or username=james

and then read the received data

how can i achieve this?

trust me i looked at a lot of stuff posted but i'm still lost.

thank you :)

Why don't you use urllib2.urlopen() or the requests module to retrieve the URL? Do you need to store the response in a file? — mhawke
– mhawke, Commented Jul 5, 2016 at 1:08
@mhawke i've been asked to use os.system and yes i need to save the setting to file — Jah
– Jah, Commented Jul 5, 2016 at 1:14

mhawke · Accepted Answer · 2016-07-05 01:50:22Z

1

Given the somewhat strange constraint that you must use os.system() you can construct the command string like this:

import os

user_id = 201    
dest_filename = '/tmp/setting.txt'
command = 'wget http://localhost/userid={} -O {}'.format(user_id, dest_filename)
res = os.system(command)
if res == 0:
    with open(dest_filename) as f:
        response = f.read()
        # process response
else:
    print('Command {!r} failed with exit code {}'.format(command, rv))

You can adapt the command construction to use a user name:

user_name = 'james'
command = 'wget http://localhost/username={} -O {}'.format(user_name, dest_filename)

answered Jul 5, 2016 at 1:50

mhawke

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4 Comments

Jah Over a year ago

It's not my choice :( i have to use that.

Jah Over a year ago

how can i use multiple variables at once? eg. userid=10&cmd=list i tried command = 'wget localhost/username={}&cmd={} -O {}'.format(cmd, cmd, dest_filename) but it don't work

mhawke Over a year ago

That will just add cmd twice. Do this: command = 'wget http://localhost/userid={}&cmd={}'.format(user_id, cmd, dest_filename).

mhawke Over a year ago

But, now that you are adding multiple parameters you might be better off using urllib.urlencode() to construct a query string and append that to the base URL.

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