URL call from SHELL script


 
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# 1  
Old 04-18-2007
URL call from SHELL script

My system does not have wget, curl and lynx. The chances are low that the SA would install them for me. Do I have any other way out? I need to invoke a few URL calls from my SHELL script.

Thought of using a PERL script or writing a simple Java client, but that adds in more dependencies.

Any idea?
# 2  
Old 04-18-2007
if you have Python, you can use it's urllib2 library
Code:
#!/usr/bin/python
import urllib2
page = urllib2.urlopen("http://www.google.com")
result = page.read()
open("output.html","w").write(result) # write to output.html

# 3  
Old 04-18-2007
Sorry, how do I know if I've python installed? Actually I just need to invoke an URL, thats all, no need to output it to a file.
# 4  
Old 04-18-2007
you can type
# which python

or

# find / -name "python*".
# 5  
Old 04-18-2007
For Perl, preferably LWP module is used for HTTP.

But for plain vanilla HTTP, if you can't really install LWP (note that you can download and install the module together with the script and not install it systemwide), a simple sequence of commands will do it:

Code:
use IO::Socket::INET; 
$http = IO::Socket::INET->new(
    PeerAddr => "www.unix.com:80",
    Proto => "tcp"
);
$http->print("GET /showthread.php?t=37182 HTTP/1.0\nHost: www.unix.com\n\n"); 
print $http->getlines();

which will display the HTML for this page. IO::Socket::INET is shipped standard with Perl, so you cannot say it is an "external dependency".
# 6  
Old 04-18-2007
My URL call is actually invoking a servlet call. I don't really need to display any HTML. So does it mean that I should just omit this line of code?

Code:
print $http->getlines();

# 7  
Old 04-18-2007
Quote:
Originally Posted by ghostdog74
you can type
# which python

or

# find / -name "python*".

Unfortunately for me, Python is also not installed. Guess I'll have to use Perl then. Thanks!
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