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2013-10-30 Accessing Facebook by LWP
Usually, we can get the content of a url by the following code in Perl
perl -MLWP::Simple -e 'getprint "http://www.google.com"';
But if you try to use it to access Facebook, like this
perl -MLWP::Simple -e 'getprint "http://www.facebook.com"';
you will get a page "Upadte your browser" instead of the real one. That's because Facebook doesn't like the default UserAgent of LWP or WWW::Curl.
The simplest way to solve it is to change the default LWP user agent string to your own string.
perl -e 'use LWP::Simple qw($ua get); $ua->agent("My agent/1.0"); print get "http://www.facebook.com";'