--- /dev/null
+#!/usr/bin/perl -w
+#
+# fetch a metar, taf or short taf from http://weather.noaa.gov
+#
+# This is a module which shows me doing my own thing using the
+# normalised input. It does essentially the same job as
+# cgi_weather.pl, it's just a lot more complicated but returns
+# a much shorter string that is a bit more cryptic.
+#
+# It also is designed really to just get the forecast and
+# actual weather.
+#
+# This is designed to be used in a IFRAME and returns HTML.
+# It will only query the website once every 30 minutes, the rest
+# of the time it will cache the result in an 'easily guessable'
+# place in /tmp (consider that as a warning).
+#
+# Call it from a web page like this:-
+#
+# <iframe src="cgi-bin/fetch_weather.pl?icao=EGSH&metar=1"
+# name="METAR for EGSH" frameborder="1" width="90%" height="50">
+# [Your user agent does not support frames or is currently configured
+# not to display frames. However, you may visit
+# <A href="cgi-bin/fetch_weather.pl?icao=EGSH&metar=1">METAR for EGSH</A>]
+# </iframe>
+#
+# You can set as many of these as you like:-
+#
+# break=1 insert a "<br /><br />" between each result
+# onediv=1 make a multiple one div (not one div per thing)
+# raw=1 will display the raw weather string
+# debug=1 will display the objects
+# force=1 always fetch the data (don't use any cached stuff)
+#
+# $Id$
+#
+# Copyright (c) 2003 Dirk Koopman G1TLH
+#
+use strict;
+
+package main;
+
+use CGI;
+use Geo::TAF;
+use LWP::UserAgent;
+
+my $q = new CGI;
+my $site_code = uc $q->param('icao');
+my @sort = qw(metar staf);
+my $debug = $q->param('debug');
+my $raw = $q->param('raw');
+my $force = $q->param('force');
+my $dobrk = "<br /><br />" if $q->param('break') && @sort > 1;
+my $onediv = $q->param('onediv') && @sort > 1;
+
+
+my %st = (
+ VV => 'vert. viz',
+ SKC => "no cloud",
+ CLR => "no cloud no sig wthr",
+ BKN => "5-7okt",
+ SCT => "3-4okt",
+ FEW => "0-2okt",
+ OVC => "8okt",
+ CAVOK => "CAVOK(no cloud >10Km viz no sig wthr)",
+ CB => 'CuNim',
+ TCU => 'tower Cu',
+ NSC => 'no sig cloud',
+ BLU => '3okt 2500ft 8Km viz',
+ WHT => '3okt 1500ft 5Km viz',
+ GRN => '3okt 700ft 3700m viz',
+ YLO => '3okt 300ft 1600m viz',
+ AMB => '3okt 200ft 800m viz',
+ RED => '3okt <200ft <800m viz',
+ NIL => 'no weather',
+ '///' => 'some',
+ );
+
+my %wt = (
+ '+' => 'heavy',
+ '-' => 'light',
+ 'VC' => 'in the vicinity',
+
+ MI => 'shallow',
+ PI => 'partial',
+ BC => 'patches of',
+ DR => 'low drifting',
+ BL => 'blowing',
+ SH => 'showers',
+ TS => 'thunderstorms containing',
+ FZ => 'freezing',
+ RE => 'recent',
+
+ DZ => 'drizzle',
+ RA => 'rain',
+ SN => 'snow',
+ SG => 'snow grains',
+ IC => 'ice crystals',
+ PE => 'ice pellets',
+ GR => 'hail',
+ GS => 'small hail/snow pellets',
+ UP => 'unknown precip',
+
+ BR => 'mist',
+ FG => 'fog',
+ FU => 'smoke',
+ VA => 'volcanic ash',
+ DU => 'dust',
+ SA => 'sand',
+ HZ => 'haze',
+ PY => 'spray',
+
+ PO => 'dust/sand whirls',
+ SQ => 'squalls',
+ FC => 'tornado',
+ SS => 'sand storm',
+ DS => 'dust storm',
+ '+FC' => 'water spouts',
+ WS => 'wind shear',
+ 'BKN' => 'broken',
+
+ 'NOSIG' => 'no significant weather',
+
+ );
+
+start();
+
+error("No ICAO (valid) site code ($site_code) specified") unless $site_code && $site_code =~ /^[A-Z]{4}$/;
+
+my $base = "/tmp";
+my ($sort, $fn, $started);
+
+print "<div class=\"weather\">$site_code ";
+
+while ($sort = shift @sort) {
+ $fn = "$base/${sort}_$site_code";
+
+ if (!$force && -e $fn) {
+ my ($mt, $size) = (stat $fn)[9,7] ;
+ $mt ||= 0;
+ $size ||= 0;
+ if ($mt + 30*60 < time || $size == 0) {
+ my $s = fetch_icao($sort);
+ store($s);
+ print $s;
+ } else {
+ my $s = retrieve($fn);
+ print $s;
+ }
+ } else {
+ my $s = fetch_icao($sort);
+ store($s);
+ print $s;
+ }
+
+ if (@sort > 0) {
+ print $onediv ? ' ' : '</div>';
+ print $dobrk if $dobrk;
+ print '<div class="weather">' unless $onediv;
+ }
+}
+
+finish();
+exit(0);
+
+sub retrieve
+{
+ my $fn = shift;
+ open IN, "$fn" or die "cannot open $fn $!\n";
+ my $s = <IN>;
+ close IN;
+ return $s;
+}
+
+sub fetch_thing
+{
+ my $sort = shift;
+
+ my $ua = new LWP::UserAgent;
+ my $req = new HTTP::Request GET =>
+ "http://weather.noaa.gov/cgi-bin/mget$sort.pl?cccc=$site_code";
+
+ my $response = $ua->request($req);
+
+ my $metar;
+ if (!$response->is_success) {
+ error("METAR Fetch $site_code Error", $response->error_as_HTML);
+ } else {
+
+ my $data = $response->as_string;
+ ($metar) = $data =~ /($site_code\s+\d+Z?[^<]*)/; # find the METAR string
+
+ # Sanity check
+ if (length $metar < 10) {
+ error("METAR ($metar) is too short");
+ }
+ }
+ return $metar;
+}
+
+sub fetch_icao
+{
+ my $sort = shift;
+ my $metar = fetch_thing($sort);
+
+ # pass the data to the METAR module.
+ my $m = new Geo::TAF;
+ if ($sort =~ /taf$/) {
+ $m->taf($metar);
+ } else {
+ $m->metar($metar);
+ }
+
+ my @in;
+ my $s;
+ $s .= join "<br />", $m->raw, "<br />" if $raw;
+ $s .= join "<br />", $m->as_chunk_strings, "<br />" if $debug;
+ foreach my $c ($m->chunks) {
+ my ($sub) = (ref $c) =~ /::([A-Z]+)$/;
+ no strict 'refs';
+ if ($sub eq 'HEAD') {
+ $sub = $sort =~ /taf$/ ? "taf$sub" : "metar$sub";
+ }
+ push @in, &$sub($c);
+ }
+ $s .= join ' ', @in;
+ return $s;
+}
+
+sub start
+{
+ return if $started;
+ print $q->header(-type=>'text/html', -expires=>'+60m');
+ print $q->start_html(-title=>"Weather for $site_code", -style=>{'src'=>'/style.css'},);
+ $started = 1;
+}
+
+sub finish
+{
+ print "</div>";
+ print $q->end_html, "\n";
+}
+
+sub store
+{
+ my $s = shift;
+ open OUT, ">$fn" or die "cannot open $fn $!\n";
+ print OUT $s;
+ close OUT;
+}
+
+sub error
+{
+ my $err = shift;
+ my $more = shift;
+ print $q->h3($err);
+ print $more if $more;
+ print "</div>", $q->end_html;
+ warn($err);
+
+ exit(0);
+}
+
+sub tafHEAD
+{
+ my @in = @{$_[0]};
+ return "FORECAST Issued $in[3] on " . Geo::TAF::EN::day($in[2]);
+}
+
+sub metarHEAD
+{
+ my @in = @{$_[0]};
+ return "CURRENT Issued $in[3] on " . Geo::TAF::EN::day($in[2]);
+}
+
+sub VALID
+{
+ my @in = @{$_[0]};
+ return "Valid $in[1]-\>$in[2] on " . Geo::TAF::EN::day($in[0]);
+}
+
+sub WIND
+{
+ my @in = @{$_[0]};
+ my $out = "Wind";
+ $out .= $in[0] eq 'VRB' ? " variable" : " $in[0]";
+ $out .= " varying $in[4]-\>$in[5]" if defined $in[4];
+ $out .= ($in[0] eq 'VRB' ? '' : "deg") . " $in[1]";
+ $out .= " gust $in[2]" if defined $in[2];
+ $out .= $in[3];
+ return $out;
+}
+
+sub PRESS
+{
+ my @in = @{$_[0]};
+ return "QNH $in[0]";
+}
+
+sub TEMP
+{
+ my @in = @{$_[0]};
+ my $out = "Temp $in[0]C";
+ $out .= " Dewp $in[1]C" if defined $in[1];
+
+ return $out;
+}
+
+sub CLOUD
+{
+ my @in = @{$_[0]};
+
+ return $st{$in[0]} if @in == 1;
+ return "Cloud $st{$in[0]} \@ $in[1]ft" if $in[0] eq 'VV';
+ my $out = "Cloud $st{$in[0]} \@ $in[1]ft";
+ $out .= " $st{$in[2]}" if defined $in[2];
+ return $out;
+}
+
+#sub WEATHER
+#{
+# goto &Geo::TAF::EN::WEATHER::as_string;
+#}
+
+
+sub WEATHER
+{
+ my @in = @{$_[0]};
+ my @out;
+
+ my ($vic, $shower);
+ my $one = $in[0];
+
+ while (@in) {
+ my $t = shift @in;
+
+ if (!defined $t) {
+ next;
+ } elsif ($t eq 'VC') {
+ $vic++;
+ next;
+ } elsif ($t eq 'SH') {
+ $shower++;
+ next;
+ } elsif ($t eq '+' && $one eq 'FC') {
+ push @out, $wt{'+FC'};
+ shift;
+ next;
+ }
+
+ push @out, $wt{$t};
+
+ if (@out && $shower) {
+ $shower = 0;
+ push @out, $wt{'SH'};
+ }
+ }
+ push @out, $wt{'VC'} if $vic;
+
+ return join ' ', @out;
+}
+
+sub RVR
+{
+ my @in = @{$_[0]};
+ my $out = "RVR R$in[0] $in[1]$in[3]";
+ $out .= " vary $in[2]$in[3]" if defined $in[2];
+ if (defined $in[4]) {
+ $out .= " decr" if $in[4] eq 'D';
+ $out .= " incr" if $in[4] eq 'U';
+ }
+ return $out;
+}
+
+sub RWY
+{
+ return "";
+}
+
+sub PROB
+{
+ my @in = @{$_[0]};
+
+ my $out = "Prob $in[0]%";
+ $out .= " $in[1]-\>$in[2]" if defined $in[1];
+ return $out;
+}
+
+sub TEMPO
+{
+ my @in = @{$_[0]};
+ my $out = "Temporary";
+ $out .= " $in[0]-\>$in[1]" if defined $in[0];
+
+ return $out;
+}
+
+sub BECMG
+{
+ my @in = @{$_[0]};
+ my $out = "Becoming";
+ $out .= " $in[0]-\>$in[1]" if defined $in[0];
+
+ return $out;
+}
+
+sub VIZ
+{
+ my @in = @{$_[0]};
+
+ return "Viz $in[0]$in[1]";
+}
+
+sub FROM
+{
+ my @in = @{$_[0]};
+
+ return "From $in[0]";
+}
+
+sub TIL
+{
+ my @in = @{$_[0]};
+
+ return "Until $in[0]";
+}
+
+1;
projects / spider.git / blobdiff