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#!/usr/bin/perl
#
# Net::Twitter - OAuth webapp example
#
package MyWebApp;
use warnings;
use strict;
use base qw/HTTP::Server::Simple::CGI/;
use Net::Twitter;
use Data::Dumper;
# You can replace the consumer tokens with your own;
# these tokens are for the Net::Twitter example app.
my %consumer_tokens = (
consumer_key => 'v8t3JILkStylbgnxGLOQ',
consumer_secret => '5r31rSMc0NPtBpHcK8MvnCLg2oAyFLx5eGOMkXM',
);
my $server_port = 8080;
sub twitter { shift->{twitter} ||= Net::Twitter->new(traits => [qw/API::REST OAuth/], %consumer_tokens) }
my %dispatch = (
'/oauth_callback' => \&oauth_callback,
'/' => \&my_last_tweet,
);
# all request start here
sub handle_request {
my ($self, $q) = @_;
my $request = $q->path_info;
warn "Handling request for $request\n";
my $handler = $dispatch{$request} || \¬_found;
$self->$handler($q);
}
# Display the authenicated user's last tweet in all its naked glory
sub my_last_tweet {
my ($self, $q) = @_;
# if the user is authorized, we'll get access tokens from a cookie
my %sess = $q->cookie('sess');
unless ( exists $sess{access_token_secret} ) {
warn "User has no access_tokens\n";
return $self->authorize($q);
}
warn <<"";
Using access tokens:
access_token => $sess{access_token}
access_token_secret => $sess{access_token_secret}
my $nt = $self->twitter;
# pass the access tokens to Net::Twitter
$nt->access_token($sess{access_token});
$nt->access_token_secret($sess{access_token_secret});
# attempt to get the user's last tweet
my $status = eval { $nt->user_timeline({ count => 1 }) };
if ( $@ ) {
warn "$@\n";
# if we got a 401 response, our access tokens were invalid; get new ones
return $self->authorize($q) if $@ =~ /\b401\b/;
# something bad happened; show the user the error
$status = $@;
}
print $q->header(-nph => 1),
$q->start_html,
$q->pre(Dumper $status),
$q->end_html;
}
# send the user to Twitter to authorize us
sub authorize {
my ($self, $q) = @_;
my $auth_url = $self->twitter->get_authorization_url(callback => "$ENV{SERVER_URL}oauth_callback");
# we'll store the request tokens in a session cookie
my $cookie = $q->cookie(-name => 'sess', -value => {
request_token => $self->twitter->request_token,
request_token_secret => $self->twitter->request_token_secret,
});
warn "Sending user to: $auth_url\n";
print $q->redirect(-nph => 1, -uri => $auth_url, -cookie => $cookie);
}
# Twitter returns the user here
sub oauth_callback {
my ($self, $q) = @_;
my $request_token = $q->param('oauth_token');
my $verifier = $q->param('oauth_verifier');
my %sess = $q->cookie(-name => 'sess');
die "Something is horribly wrong" unless $sess{request_token} eq $request_token;
$self->twitter->request_token($request_token);
$self->twitter->request_token_secret($sess{request_token_secret});
warn <<"";
User returned from Twitter with:
oauth_token => $request_token
oauth_verifier => $verifier
# exchange the request token for access tokens
my @access_tokens = $self->twitter->request_access_token(verifier => $verifier);
warn <<"";
Exchanged request tokens for access tokens:
access_token => $access_tokens[0]
access_token_secret => $access_tokens[1]
# we'll store the access tokens in a session cookie
my $cookie = $q->cookie(-name => 'sess', -value => {
access_token => $access_tokens[0],
access_token_secret => $access_tokens[1],
});
warn "redirecting newly authorized user to $ENV{SERVER_URL}\n";
print $q->redirect(-nph => 1, -uri => "$ENV{SERVER_URL}", -cookie => $cookie);
}
# display a 404 Not found for any request we don't expect
sub not_found {
my ($self, $q) = @_;
print $q->header(-nph => 1, -type => 'text/html', -status => '404 Not found'),
$q->start_html,
$q->h1('Not Found'),
$q->p('You appear to be lost. Try going home.');
}
my $app = MyWebApp->new($server_port);
$app->run;
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