Mercurial > hg > egg-tcls
view fetch_weather.pl @ 178:9b8ec700ede4
Clean up the weather data parser backend a bit.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Tue, 03 Jun 2014 15:10:47 +0300 |
parents | e4faa3746869 |
children | 24f9f38210fe |
line wrap: on
line source
#!/usr/bin/perl -w use strict; use LWP::UserAgent; use HTML::Entities; use XML::Simple; use Text::Iconv; use Date::Parse; use Data::Dumper; ### ### Globals ### my %settings = ( "debug" => 0, "opt_fmi" => 0, "opt_tiehallinto" => 0, "fmi_api_key" => "", "outfile" => "", ); ### ### Helper functions ### sub mlog($) { print STDERR $_[0]; } sub fetch_http($) { my $tmpAgent = LWP::UserAgent->new; $tmpAgent->agent("Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows NT 6.0) Opera 10.63 [en]"); $tmpAgent->timeout(10); my $tmpRequest = HTTP::Request->new(GET => $_[0]); return $tmpAgent->request($tmpRequest); } sub parse_timestamp($$) { return str2time($_[0]) - str2time("00:00") + $_[1]; } sub str_trim($) { my $str = $_[0]; if (defined($str)) { $str =~ s/^\s*//; $str =~ s/\s*$//; } return $str; } ### ### Loose HTML parser ### sub pop_token_a($) { my $tokens = $_[0]; return shift(@$tokens); } sub pop_token($) { return str_trim(pop_token_a($_[0])); } sub parse_html_str($) { my $tokens = $_[0]; my $token = pop_token($tokens); my $str = ""; $token =~ s/^\s*//; return undef unless (substr($token, 0, 1) eq '"'); $token = substr($token, 1); while (defined($token)) { my $tmp = $token; $tmp =~ s/\s*$//; if (substr($tmp, -1) eq '"') { $str .= substr($tmp, 0, -1); return $str; } else { $str .= $token; } $token = shift(@$tokens); } return undef; } sub parse_html_tree($$); sub parse_html_tree($$) { my ($tokens, $tree) = @_; while (my $token = pop_token($tokens)) { if ($token =~ /^<[!\/]?[a-zA-Z]+/) { $token = lc($token); if ($token =~ /^<\!.*>$/) { # Ignore comments etc. } elsif ($token =~ /^<([a-z]+[1-9]*)(.*)>$/) { my ($name, $args) = ($1, $2); if ($name eq "meta" || $name eq "img") { my $tmp = {}; parse_html_tree($tokens, $tree); return $tree; } else { my $tmp = { "name" => $name, "args" => str_trim($args) }; parse_html_tree($tokens, $tmp); push(@{$$tree{"nodes"}}, $tmp); } } elsif ($token =~ /^<\/([a-z]+[1-9]*)>$/) { return $tree; } else { die("HORROR TERROR ELITE: '$token'\n"); } } else { $token = str_trim(decode_entities($token)); push(@{$$tree{"nodes"}}, { "name" => "text", "args" => "", "text" => $token }) if length($token) > 0; } } return $tree; } sub parse_html($) { return undef unless defined($_[0]); my $str = $_[0]; my $res = { "name" => "", "args" => "" }; $str =~ tr/\r/ /; $str =~ tr/\n/ /; my @tokens = grep { !($_ =~ /^\s*$/) } split(/(<\/?[a-zA-Z]+.*?>)/, $str); parse_html_tree(\@tokens, $res); return $res; } sub html_find_node($$$); sub html_find_node($$$) { my ($node, $name, $args) = @_; if (defined($node)) { if (ref($node) eq "ARRAY") { foreach my $n (@$node) { my $tmp = html_find_node($n, $name, $args); # Must do it like this, in order not to break the loop return $tmp if defined($tmp); } } elsif (ref($node) eq "HASH") { if (defined($$node{"name"})) { if ($$node{"name"} eq $name) { if ($args ne "") { if (defined($$node{"args"}) && $$node{"args"} =~ /$args/) { } else { return html_find_node($$node{"nodes"}, $name, $args); } } return $node; } else { return html_find_node($$node{"nodes"}, $name, $args); } } } } return undef; } ### ### Helper functions for locating/traversing nodes ### in the parsed data tree structure. ### sub fnode($$) { return html_find_node($_[0], $_[1], ""); } sub fnodea($$$) { return html_find_node($_[0], $_[1], $_[2]); } sub get_node($$$) { return defined($_[0]->[$_[2]]{"nodes"}[0]{$_[1]}) ? $_[0]->[$_[2]]{"nodes"}[0]{$_[1]} : ""; } ### ### Configuration handling ### sub opt_chk_bool($) { if (defined($settings{$_[0]})) { my $val = $settings{$_[0]}; return ($val == 1 || $val eq "true" || $val eq "on" || $val eq "1"); } else { return 0; } } sub opt_chk_valid($$) { if (defined($settings{$_[0]})) { my $val = $settings{$_[0]}; return length($val) >= $_[1]; } else { return 0; } } sub opt_get($) { if (defined($settings{$_[0]})) { return $settings{$_[0]}; } else { return undef; } } sub opt_read_config($) { my $filename = $_[0]; my $errors = 0; my $line = 0; open(CONFFILE, "<", $filename) or die("Could not open configuration '".$filename."'!\n"); while (<CONFFILE>) { $line++; chomp; if (/(^\s*#|^\s*$)/) { # Ignore comments and empty lines } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*(\d+),?\s*$/) { my $key = lc($1); my $value = $2; if (defined($settings{$key})) { $settings{$key} = $value; } else { mlog("[$filename:$line] Unknown setting '$key' = $value\n"); $errors = 1; } } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*\"(.*?)\",?\s*$/) { my $key = lc($1); my $value = $2; if (defined($settings{$key})) { $settings{$key} = $value; } else { mlog("[$filename:$line] Unknown setting '$key' = '$value'\n"); $errors = 1; } } else { mlog("[$filename:$line] Syntax error: $_\n"); $errors = 1; } } close(CONFFILE); return $errors; } ### ### Main program begins ### my $weatherdata = {}; die( "Weather Fetch v0.1 by ccr/TNSP <ccr\@tnsp.org>\n". "Usage: $0 <config file>\n" ) unless scalar(@ARGV) >= 1; my $cfgfile = shift; opt_read_config($cfgfile) == 0 or die("Errors while parsing configuration file '".$cfgfile."'.\n"); ### ### Fetch tiehallinto road weather measurement data ### if (opt_chk_bool("opt_tiehallinto")) { for (my $i = 1; $i <= 22; $i++) { my $res = fetch_http("http://alk.tiehallinto.fi/alk/tiesaa/tiesaa_maak_".$i.".html"); if ($res->code >= 200 && $res->code <= 201) { my $data = $res->decoded_content; # Filter out crap tags we don't want or need $data =~ s/\n/§/g; $data =~ s/<!--.*?-->//ig; $data =~ s/<map[^>]*>.*?<\/map>//ig; $data =~ s/<form[^>]*>.*?<\/form>//ig; $data =~ s/<script[^>]*>.*?<\/script>//ig; $data =~ s/<meta[^>]*>//ig; $data =~ s/<font[^>]*>//ig; $data =~ s/<\/font>//ig; $data =~ s/<span[^>]*>//ig; $data =~ s/<\/span>//ig; $data =~ s/<\/?b>//ig; $data =~ s/<br>//ig; $data =~ s/ / /ig; $data =~ s/§/\n/g; # Parse the HTML mess my $otree = parse_html($data); # Find our desired element nodes my $odata = fnodea(fnode($otree, "body"), "div", "class=elementc"); my $oupdate = fnode($odata, "p"); my $time_base = str2time("00:00"); if ($oupdate) { my $tmp = $oupdate->{"nodes"}[0]{"text"}; if ($tmp =~ /:\s+(\d\d\.\d\d\.\d\d\d\d)\s+(\d\d:\d\d)/) { $time_base = str2time($1); } } my $oelems = fnode($odata, "table")->{"nodes"}; for (my $n = 1; $n < scalar(@$oelems); $n++) { my $fdata = @$oelems[$n]->{"nodes"}; $weatherdata->{$fdata->[0]{"nodes"}[0]{"text"}} = [ parse_timestamp(get_node($fdata, "text", 1), $time_base), get_node($fdata, "text", 2), get_node($fdata, "text", 3), get_node($fdata, "text", 4), ]; } } } } ### ### Fetch FMI data ### if (opt_chk_bool("opt_fmi")) { die("FMI data scrape enabled, but no API key set.\n") unless opt_chk_valid("fmi_api_key", 10); my $res = fetch_http("http://data.fmi.fi/fmi-apikey/".opt_get("fmi_api_key"). "/wfs?request=getFeature&storedquery_id=fmi::observations::weather::cities::multipointcoverage". "¶meters=temperature,humidity"); if ($res->code >= 200 && $res->code <= 201) { my $xml = XMLin($res->decoded_content); my $time_base = time(); foreach my $item (@{$xml->{"wfs:member"}}) { my $fitem = $item->{"omso:GridSeriesObservation"}; if (defined($fitem->{"om:phenomenonTime"}{"gml:TimePeriod"})) { $time_base = str2time($fitem->{"om:phenomenonTime"}{"gml:TimePeriod"}{"gml:endPosition"}); } my $fname = $fitem->{"om:featureOfInterest"}{"sams:SF_SpatialSamplingFeature"}{"sams:shape"}{"gml:MultiPoint"}{"gml:pointMember"}{"gml:Point"}{"gml:name"}; my $fres = $fitem->{"om:result"}{"gmlcov:MultiPointCoverage"}{"gml:rangeSet"}{"gml:DataBlock"}{"gml:doubleOrNilReasonTupleList"}; ### TODO XXX HALARM - ei ota viimeista arvoa, kuten pitais if ($fres =~ /([\+\-]?\d+\.?\d*)\s+([\+\-]?\d+\.?\d*)/) { my ($ftemp, $fhumid) = ($1, $2); $weatherdata->{$fname} = [ $time_base, $ftemp, "", "", $fhumid, ]; } } } } ### ### Output ### if (opt_chk_valid("outfile", 1)) { open(STDOUT, '>', opt_get("outfile")) or die("Could not open output file '".opt_get("outfile")."'.\n"); } binmode STDOUT, ':encoding(utf-8)'; foreach my $key (sort { $a cmp $b } keys %$weatherdata) { print STDOUT $key."|".join("|", @{$weatherdata->{$key}})."\n"; } close(STDOUT);