Software

• Search engine in PERL for GOOGLE

Using the search.pl script, written in perl, you can automatically query Google, save your results is a file, and much more.
This software was developed to use it with a web crawler to make complex graphs, for the project Complexity and its applications from nanometric to cosmic structures undertaken by Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi.

Installation steps:

1. Download the Google Web APIs developer's kit
2. Create your Google account and obtain a license key (free of charge)
3. Download the search.pl script (it uses the GNU General Public License)
4. Make sure you have installed the modules SOAP::Lite and Getopt::Long
5. Put the file GoogleSearch.wsdl (from the Google Web APIs developer's kit) in the same directory where you run search.pl

Usage and options:

search.pl <search-phrase> [OPTIONS]

Options (unique abbraviations are allowed):
-f, --file        output goes to file
-h, --help        display this help and exit
-l, --language    return only pages written in language (XY)
                   (use en for English, fr for French, ...
-k, --key         specify your google-key (mandatory)
-r, --results     number of URL results to display
-w, --waiting     wait time after one query of 10 URLs (to query google nicely)
The argument -k (--key) is mandatory,
to obtain you personal key, register at http://www.google.com/apis/

Examples:

search.pl "Hello world" --key=+mZ2pfxxyyxxyyxxyyxxyyxxyyxxyyxx
search google.com for the string "Hello World", using your personal key, you get 10 URLs.

search.pl "Hello world" -l it -r 500 -f res.txt -k +mZ2pfxxyyxxyyxxyyxxyyxxyyxxyyxx
search google.com for the string "Hello World",
return only pages written in Italian,
return 500 URLs,
write output to file res.txt,
specify your personal key.