source: trunk/npemap.org.uk/cgi/submit.fcgi @ 545

Last change on this file since 545 was 545, checked in by Nick Burch, 13 years ago

Support IE postcodes

  • Property svn:executable set to *
File size: 5.3 KB
Line 
1#!/usr/bin/perl
2#
3# Copyright (c) 2006 Dominic Hargreaves
4# See accompanying file "LICENCE" for licence details
5
6use strict;
7use warnings;
8
9use CGI::Fast qw/:standard -debug/;
10use Geo::Postcode;
11
12# Find our private perl libraries
13use FindBin;
14use lib "$FindBin::Bin/../perllib";
15use NPEMap;
16use NPEMap::Postcodes;
17
18# Set up database handler to try and make sure it's ready for the first
19# request
20# No point in handling errors here since they'll get handled by the request
21# handler
22my $dbh = setup_dbh();
23
24my @fields = qw(easting northing postcode1 postcode2);
25my $returnBaseURL = '';
26
27my $googleAnalytics = <<"HERE";
28<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
29</script>
30<script type="text/javascript">
31_uacct = "UA-732621-2";
32if (typeof urchinTracker == 'function') urchinTracker();
33</script>
34HERE
35my $cgi;
36# Process incoming requests
37REQUEST: while ($cgi = new CGI::Fast) {
38
39my $returnlink = '';
40   
41
42
43    # In case the database went away, make sure we have a connection
44    unless ($dbh = setup_dbh()) {
45        print_html_err('Error setting up database connection', $returnlink);
46        next REQUEST;
47    }
48
49    my ($easting, $northing);
50
51    # Input validation
52    foreach my $field (@fields) {
53        unless (defined $cgi->param($field)) {
54            print_html_err ("Parameter '$field' missing", $returnlink);
55            next REQUEST;
56        }
57    }
58
59    # Is the Easting in a valid range?
60    if (($cgi->param('easting') > 700000) or
61        ($cgi->param('easting') < 0)) {
62        print_html_err ("Parameter 'easting' must be an integer between 0 and 700,000", $returnlink);
63        next REQUEST;
64    } else {
65        $easting = $cgi->param('easting');
66    }
67
68    # Is the Northing in a valid range?
69    if (($cgi->param('northing') > 1300000) or
70        ($cgi->param('northing') < 0)) {
71        print_html_err("Parameter 'northing' must be an integer between 0 and 1,300,000", $returnlink);
72        next REQUEST;
73    } else {
74        $northing = $cgi->param('northing');
75    }
76
77        # Are they using the irish grid?
78        my $ie = 0;
79        if(defined $cgi->param('ie')) {
80                $ie = 1;
81        }
82        if(defined $cgi->param('grid') && ($cgi->param('grid') eq 'osie')) {
83                $ie = 1;
84        }
85
86        # What column do we use for the postcode?
87        my $easting_col = "easting";
88        my $northing_col = "northing";
89        if($ie) {
90                $easting_col = "ie_easting";
91                $northing_col = "ie_northing";
92        }
93
94    my $sth;
95
96    # Now validate the postcode input format
97    my ($trimmed_1, $trimmed_2) = ($cgi->param('postcode1'), $cgi->param('postcode2'));
98    $trimmed_1 =~ s/^\s+//;
99    $trimmed_2 =~ s/^\s+//;
100    $trimmed_1 =~ s/\s+$//;
101    $trimmed_2 =~ s/\s+$//;
102    my $raw_postcode = $trimmed_1;
103    $raw_postcode .= ' ' . $trimmed_2 if defined $trimmed_2;
104
105    unless ((length($trimmed_2)) == 1 or (length($trimmed_2) == 0) or (length($trimmed_2) == 3) or (!defined $trimmed_2)) {
106        print_html_err("The postcode format is not valid", $returnlink);
107        next REQUEST;
108    }
109
110    my $postcode = Geo::Postcode->new($raw_postcode);
111    my ($first, $second, $third, $fourth) = @{$postcode->fragments};
112    my ($outward, $inward);
113
114    if ($postcode->valid) {
115        # We have a complete postcode; input it straight into the database
116        $outward = $first . $second;
117        $inward = $third . $fourth;
118    } elsif($postcode->valid_fragment) {
119        # We have a valid fragment; let's build up what we can
120        # We are guaranteed to have the first two
121        $outward = $first . $second;
122        $inward = '';
123        $inward .= $third if defined $third;
124        $inward .= $fourth if defined $fourth;
125    } else {
126        print_html_err("The postcode format is not valid", $returnlink);
127        next REQUEST;
128    }
129
130    # Check for a duplicate.
131    # We want to collect duplicates from different IP addresses as a kind of
132    # corroboration factor; this just catches accidental double-submission
133    # really.
134    $sth = $dbh->prepare("SELECT raw_postcode_outward FROM postcodes WHERE raw_postcode_outward = ? AND raw_postcode_inward = ? AND $easting_col = ? AND $northing_col = ? AND ip = ? AND NOT deleted");
135    unless ($sth->execute($cgi->param('postcode1'), $cgi->param('postcode2'), $easting, $northing, $ENV{'REMOTE_ADDR'})) {
136        print_html_err('Database error when checking for duplicate data :(', $returnlink);
137        next REQUEST;
138    }
139
140    if ($sth->rows) {
141        print_html_err('You, or someone with the same IP address, have already submitted this postcode with these co-ordinates.', $returnlink);
142        next REQUEST;
143    }
144
145    $sth = $dbh->prepare("INSERT INTO postcodes (outward, inward, raw_postcode_outward, raw_postcode_inward, $easting_col, $northing_col, ip, source, user_agent) VALUES (?, ?, ?, ?, ?, ?, ?, 0, ?)");
146    if ($sth->execute($outward, $inward, $cgi->param('postcode1'), $cgi->param('postcode2'), $easting, $northing, $ENV{'REMOTE_ADDR'}, $ENV{'HTTP_USER_AGENT'})) {
147        print "Content-type: text/html\n\n";
148        print "<p>Thank you for telling us where your post code is!</p>\n";
149        # Any extra actions
150        build_home_stats($dbh);
151        next REQUEST;
152    } else {
153        print STDERR "DB error: " . $dbh->errstr . "\n";
154        print_html_err("Database error when adding your data :(", $returnlink);
155        next REQUEST;
156    }
157
158# WE NEVER GET HERE
159
160}
161
162# No more requests to serve, so tidy up
163$dbh->disconnect;
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