annotate fetch_weather.pl @ 213:330d7e39c8f4

weather: Add extra data field.
author Matti Hamalainen <ccr@tnsp.org>
date Wed, 24 Sep 2014 21:42:58 +0300
parents 5f04ec60e8d9
children fe420576f284
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1 #!/usr/bin/perl -w
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2 ##########################################################################
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3 #
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4 # Fetch Weather v0.1 by Matti 'ccr' Hamalainen <ccr@tnsp.org>
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5 # (C) Copyright 2014 Tecnic Software productions (TNSP)
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6 # This script is freely distributable under GNU GPL (version 2) license.
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7 #
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8 # Should be ran as a cronjob, and configured properly.
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9 # */10 * * * * perl -w /absolute/path/to/fetch_weather.pl /path/to/configfile
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10 #
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11 # Configuration file example is in fetch_weather.config
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12 #
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13 # Requires various Perl modules, in Debian the packages should be:
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14 # libwww-perl libxml-simple-perl libtimedate-perl
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15 #
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16 #
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17 ##########################################################################
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18 use strict;
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19 use LWP::UserAgent;
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20 use HTML::Entities;
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21 use XML::Simple;
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22 use Date::Format;
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23 use Date::Parse;
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24 use Data::Dumper;
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25
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26
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27 ###
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28 ### Configuration settings
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29 ###
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30 my %settings = (
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31 "debug" => 0,
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32 "opt_fmi" => 0,
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33 "opt_tiehallinto" => 0,
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34 "fmi_api_key" => "",
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35 "outfile" => "",
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36 "http_user_agent" => "Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows NT 6.0) Opera 10.63 [en]",
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37 );
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39
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40 ###
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41 ### Helper functions
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42 ###
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43 sub mlog($)
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44 {
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45 print STDERR $_[0];
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46 }
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48
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49 sub fetch_http($)
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50 {
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51 my $agent = LWP::UserAgent->new;
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52 $agent->agent($settings{"http_user_agent"});
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53 $agent->timeout(20);
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54
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55 my $req = HTTP::Request->new(GET => $_[0]);
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56
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57 return $agent->request($req);
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58 }
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60
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61 sub parse_timestamp($$)
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62 {
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63 my ($str, $offs) = @_;
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64 if ($str =~ /^(\d+):(\d+)$/)
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65 {
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66 return $offs + (60 * 60 * $1) + ($2 * 60);
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67 }
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68 else
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69 {
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70 return $offs;
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71 }
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72 }
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74
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75 sub format_time_gmt($)
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76 {
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77 # 2012-02-27T00:00:00Z
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78 return time2str("%Y-%m-%dT%TZ", $_[0], "UTC");
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79 }
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80
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81
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82 sub str_trim($)
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83 {
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84 my $str = $_[0];
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85 if (defined($str))
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86 {
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87 $str =~ s/^\s*//;
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88 $str =~ s/\s*$//;
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89 }
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90 return $str;
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91 }
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93
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94 ###
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95 ### Loose HTML parser
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96 ###
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97 sub pop_token_a($)
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98 {
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99 my $tokens = $_[0];
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100 return shift(@$tokens);
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101 }
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103
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104 sub pop_token($)
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105 {
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106 return str_trim(pop_token_a($_[0]));
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107 }
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110 sub parse_html_str($)
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111 {
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112 my $tokens = $_[0];
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113 my $token = pop_token($tokens);
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114 my $str = "";
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115 $token =~ s/^\s*//;
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116
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117 return undef unless (substr($token, 0, 1) eq '"');
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118 $token = substr($token, 1);
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120 while (defined($token)) {
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121 my $tmp = $token;
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122 $tmp =~ s/\s*$//;
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123 if (substr($tmp, -1) eq '"') {
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124 $str .= substr($tmp, 0, -1);
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125 return $str;
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126 } else {
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127 $str .= $token;
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128 }
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129 $token = shift(@$tokens);
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130 }
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131 return undef;
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132 }
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135 sub parse_html_tree($$);
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136
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137 sub parse_html_tree($$)
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138 {
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139 my ($tokens, $tree) = @_;
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140
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141 while (my $token = pop_token($tokens)) {
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142 if ($token =~ /^<[!\/]?[a-zA-Z]+/) {
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143 $token = lc($token);
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144 if ($token =~ /^<\!.*>$/) {
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145 # Ignore comments etc.
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146 } elsif ($token =~ /^<([a-z]+[1-9]*)(.*)>$/) {
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147 my ($name, $args) = ($1, $2);
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148 if ($name eq "meta" || $name eq "img") {
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149 my $tmp = {};
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150 parse_html_tree($tokens, $tree);
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151 return $tree;
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152 } else {
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153 my $tmp = { "name" => $name, "args" => str_trim($args) };
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154 parse_html_tree($tokens, $tmp);
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155 push(@{$$tree{"nodes"}}, $tmp);
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156 }
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157 } elsif ($token =~ /^<\/([a-z]+[1-9]*)>$/) {
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158 return $tree;
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159 } else {
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160 die("HORROR TERROR ELITE: '$token'\n");
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161 }
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162 } else {
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163 $token = str_trim(decode_entities($token));
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164 push(@{$$tree{"nodes"}}, { "name" => "text", "args" => "", "text" => $token }) if length($token) > 0;
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165 }
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166 }
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167
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168 return $tree;
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169 }
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170
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171
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172 sub parse_html($)
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173 {
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174 return undef unless defined($_[0]);
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175 my $str = $_[0];
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176 my $res = { "name" => "", "args" => "" };
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177 $str =~ tr/\r/ /;
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178 $str =~ tr/\n/ /;
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179 my @tokens = grep { !($_ =~ /^\s*$/) } split(/(<\/?[a-zA-Z]+.*?>)/, $str);
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180 parse_html_tree(\@tokens, $res);
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181 return $res;
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182 }
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183
197
0fd2435371eb Cosmetics.
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184
158
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185 sub html_find_node($$$);
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186
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187 sub html_find_node($$$)
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188 {
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189 my ($node, $name, $args) = @_;
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190
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191 if (defined($node)) {
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192 if (ref($node) eq "ARRAY") {
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193 foreach my $n (@$node) {
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194 my $tmp = html_find_node($n, $name, $args);
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195 # Must do it like this, in order not to break the loop
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196 return $tmp if defined($tmp);
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197 }
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198 } elsif (ref($node) eq "HASH") {
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199 if (defined($$node{"name"})) {
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200 if ($$node{"name"} eq $name) {
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diff changeset
201 if ($args ne "") {
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202 if (defined($$node{"args"}) && $$node{"args"} =~ /$args/) {
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203 } else {
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204 return html_find_node($$node{"nodes"}, $name, $args);
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205 }
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206 }
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207 return $node;
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208 } else {
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209 return html_find_node($$node{"nodes"}, $name, $args);
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210 }
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211 }
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212 }
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213 }
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214 return undef;
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215 }
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216
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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217
178
9b8ec700ede4 Clean up the weather data parser backend a bit.
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218 ###
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219 ### Helper functions for locating/traversing nodes
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220 ### in the parsed data tree structure.
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221 ###
158
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222 sub fnode($$)
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223 {
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224 return html_find_node($_[0], $_[1], "");
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225 }
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226
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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227
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diff changeset
228 sub fnodea($$$)
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229 {
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230 return html_find_node($_[0], $_[1], $_[2]);
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231 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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232
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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233
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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diff changeset
234 sub get_node($$$)
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diff changeset
235 {
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236 return defined($_[0]->[$_[2]]{"nodes"}[0]{$_[1]}) ? $_[0]->[$_[2]]{"nodes"}[0]{$_[1]} : "";
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237 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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238
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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239
212
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
240 my %th_rain_states =
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diff changeset
241 (
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
242 "Pouta" => "Poutaa",
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diff changeset
243 "Heikko" => "Heikkoa sadetta",
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parents: 208
diff changeset
244 "Kohtalainen" => "Kohtalaista sadetta",
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diff changeset
245 "Voimakas" => "Voimakasta sadetta",
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Matti Hamalainen <ccr@tnsp.org>
parents: 208
diff changeset
246 );
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diff changeset
247
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diff changeset
248 my $th_rain_states_k = join("|", map {quotemeta} sort { length($b)<=>length($a) } keys %th_rain_states);
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diff changeset
249
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diff changeset
250 sub translate_th_rain($)
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diff changeset
251 {
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
252 my $tmp = $_[0];
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diff changeset
253 $tmp =~ s/($th_rain_states_k)/$th_rain_states{$1}/go;
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diff changeset
254 return $tmp;
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diff changeset
255 }
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
256
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
257
158
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258 ###
178
9b8ec700ede4 Clean up the weather data parser backend a bit.
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diff changeset
259 ### Configuration handling
164
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diff changeset
260 ###
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diff changeset
261 sub opt_chk_bool($)
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diff changeset
262 {
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diff changeset
263 if (defined($settings{$_[0]}))
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diff changeset
264 {
d5a0e4248f3e weather: Implement configuration file support for weather fetcher backend.
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diff changeset
265 my $val = $settings{$_[0]};
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266 return ($val == 1 || $val eq "true" || $val eq "on" || $val eq "1");
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diff changeset
267 }
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diff changeset
268 else
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diff changeset
269 {
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diff changeset
270 return 0;
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diff changeset
271 }
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diff changeset
272 }
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diff changeset
273
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diff changeset
274
d5a0e4248f3e weather: Implement configuration file support for weather fetcher backend.
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diff changeset
275 sub opt_chk_valid($$)
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diff changeset
276 {
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diff changeset
277 if (defined($settings{$_[0]}))
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diff changeset
278 {
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diff changeset
279 my $val = $settings{$_[0]};
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diff changeset
280 return length($val) >= $_[1];
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diff changeset
281 }
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parents: 162
diff changeset
282 else
d5a0e4248f3e weather: Implement configuration file support for weather fetcher backend.
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parents: 162
diff changeset
283 {
d5a0e4248f3e weather: Implement configuration file support for weather fetcher backend.
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284 return 0;
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285 }
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286 }
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287
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288
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289 sub opt_get($)
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290 {
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291 if (defined($settings{$_[0]}))
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292 {
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293 return $settings{$_[0]};
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294 }
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295 else
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296 {
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297 return undef;
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298 }
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299 }
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300
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301
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302 sub opt_read_config($)
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303 {
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304 my $filename = $_[0];
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305 my $errors = 0;
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306 my $line = 0;
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307
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308 open(CONFFILE, "<", $filename) or die("Could not open configuration '".$filename."'!\n");
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309 while (<CONFFILE>)
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310 {
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311 $line++;
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312 chomp;
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313 if (/(^\s*#|^\s*$)/) {
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314 # Ignore comments and empty lines
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315 } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*(\d+),?\s*$/) {
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316 my $key = lc($1);
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317 my $value = $2;
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318 if (defined($settings{$key})) {
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319 $settings{$key} = $value;
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320 } else {
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321 mlog("[$filename:$line] Unknown setting '$key' = $value\n");
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322 $errors = 1;
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323 }
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324 } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*\"(.*?)\",?\s*$/) {
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325 my $key = lc($1);
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326 my $value = $2;
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327 if (defined($settings{$key})) {
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328 $settings{$key} = $value;
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329 } else {
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330 mlog("[$filename:$line] Unknown setting '$key' = '$value'\n");
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331 $errors = 1;
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332 }
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333 } else {
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334 mlog("[$filename:$line] Syntax error: $_\n");
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335 $errors = 1;
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336 }
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337 }
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338 close(CONFFILE);
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339 return $errors;
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340 }
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341
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342
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343 ###
158
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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344 ### Main program begins
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345 ###
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346 my $weatherdata = {};
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347
164
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348 die(
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349 "Weather Fetch v0.1 by ccr/TNSP <ccr\@tnsp.org>\n".
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350 "Usage: $0 <config file>\n"
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351 ) unless scalar(@ARGV) >= 1;
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352
178
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353 my $cfgfile = shift;
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354 opt_read_config($cfgfile) == 0 or die("Errors while parsing configuration file '".$cfgfile."'.\n");
164
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355
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356
178
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357 ###
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358 ### Fetch tiehallinto road weather measurement data
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359 ###
164
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360 if (opt_chk_bool("opt_tiehallinto"))
158
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361 {
164
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diff changeset
362 for (my $i = 1; $i <= 22; $i++)
158
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363 {
164
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364 my $res = fetch_http("http://alk.tiehallinto.fi/alk/tiesaa/tiesaa_maak_".$i.".html");
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365 if ($res->code >= 200 && $res->code <= 201)
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diff changeset
366 {
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367 my $data = $res->decoded_content;
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368
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diff changeset
369 # Filter out crap tags we don't want or need
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370 $data =~ s/\n/§/g;
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371 $data =~ s/<!--.*?-->//ig;
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372 $data =~ s/<map[^>]*>.*?<\/map>//ig;
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373 $data =~ s/<form[^>]*>.*?<\/form>//ig;
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374 $data =~ s/<script[^>]*>.*?<\/script>//ig;
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diff changeset
375 $data =~ s/<meta[^>]*>//ig;
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diff changeset
376 $data =~ s/<font[^>]*>//ig;
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diff changeset
377 $data =~ s/<\/font>//ig;
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diff changeset
378 $data =~ s/<span[^>]*>//ig;
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diff changeset
379 $data =~ s/<\/span>//ig;
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diff changeset
380 $data =~ s/<\/?b>//ig;
158
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diff changeset
381
164
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diff changeset
382 $data =~ s/<br>//ig;
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diff changeset
383 $data =~ s/&nbsp;/ /ig;
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diff changeset
384 $data =~ s/§/\n/g;
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diff changeset
385
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diff changeset
386 # Parse the HTML mess
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diff changeset
387 my $otree = parse_html($data);
158
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diff changeset
388
164
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diff changeset
389 # Find our desired element nodes
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diff changeset
390 my $odata = fnodea(fnode($otree, "body"), "div", "class=elementc");
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diff changeset
391 my $oupdate = fnode($odata, "p");
199
95012f8f687a Another round of timestamp parsing changes, urgh.
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diff changeset
392 my $time_base = str2time("00:00");
164
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diff changeset
393 if ($oupdate) {
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diff changeset
394 my $tmp = $oupdate->{"nodes"}[0]{"text"};
199
95012f8f687a Another round of timestamp parsing changes, urgh.
Matti Hamalainen <ccr@tnsp.org>
parents: 198
diff changeset
395 if ($tmp =~ /:\s+(\d\d)\.(\d\d)\.(\d\d\d\d)\s+(\d\d:\d\d)/) {
95012f8f687a Another round of timestamp parsing changes, urgh.
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diff changeset
396 $time_base = str2time($3."-".$2."-".$1);
164
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diff changeset
397 }
158
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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diff changeset
398 }
164
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diff changeset
399
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diff changeset
400 my $oelems = fnode($odata, "table")->{"nodes"};
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diff changeset
401 for (my $n = 1; $n < scalar(@$oelems); $n++)
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diff changeset
402 {
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diff changeset
403 my $fdata = @$oelems[$n]->{"nodes"};
212
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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parents: 208
diff changeset
404 $weatherdata->{get_node($fdata, "text", 0)} =
164
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diff changeset
405 [
201
92f4a489b7ef Add data type index.
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parents: 200
diff changeset
406 0,
164
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diff changeset
407 parse_timestamp(get_node($fdata, "text", 1), $time_base),
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diff changeset
408 get_node($fdata, "text", 2),
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diff changeset
409 get_node($fdata, "text", 3),
212
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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parents: 208
diff changeset
410 translate_th_rain(get_node($fdata, "text", 4)),
213
330d7e39c8f4 weather: Add extra data field.
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parents: 212
diff changeset
411 "",
212
5f04ec60e8d9 weather: "Translate" rain state from Tiehallitus data.
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diff changeset
412 get_node($fdata, "text", 5),
164
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diff changeset
413 ];
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diff changeset
414 }
158
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415 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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416 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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417 }
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418
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419
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420 ###
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421 ### Fetch FMI data
178
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422 ###
164
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423 if (opt_chk_bool("opt_fmi"))
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424 {
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425 die("FMI data scrape enabled, but no API key set.\n") unless opt_chk_valid("fmi_api_key", 10);
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426
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427 my $uri = "http://data.fmi.fi/fmi-apikey/".opt_get("fmi_api_key").
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428 "/wfs?request=getFeature&storedquery_id=fmi::observations::weather::".
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429 "multipointcoverage".
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430 # "timevaluepair".
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431 "&starttime=".format_time_gmt(time() - 10*60)."&endtime=".format_time_gmt(time()).
189
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432 "&parameters=temperature,humidity&maxlocations=50&bbox=19,59,32,70";
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433
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434 print STDERR "FMI URI: ".$uri."\n" if opt_chk_bool("debug");
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435
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436 my $res = fetch_http($uri);
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437 if ($res->code >= 200 && $res->code <= 201)
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438 {
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439 my $xml = XMLin($res->decoded_content);
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440 my $time_base = time();
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441
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442 if (defined($xml->{"wfs:member"}{"omso:GridSeriesObservation"}))
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443 {
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444 my $fdata = $xml->{"wfs:member"}{"omso:GridSeriesObservation"};
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445 my $fshit = $fdata->{"om:result"}{"gmlcov:MultiPointCoverage"};
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446 my @farray = ();
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447
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448 foreach my $fline (split(/\n/, $fshit->{"gml:domainSet"}{"gmlcov:SimpleMultiPoint"}{"gmlcov:positions"}))
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449 {
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450 if ($fline =~ /^\s*([\+\-]?\d+\.\d*)\s+([\+\-]?\d+\.\d*)\s+(\d+)\s*$/)
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451 {
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452 push(@farray, {"lat" => $1, "long" => $2, "time" => $3});
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453 }
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454 }
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455
208
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456 my $findex = 0;
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457 foreach my $fline (split(/\n/, $fshit->{"gml:rangeSet"}{"gml:DataBlock"}{"gml:doubleOrNilReasonTupleList"}))
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458 {
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459 if ($fline =~ /^\s*([\+\-]?\d+\.\d*|NaN)\s+([\+\-]?\d+\.\d*|NaN)\s*$/)
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460 {
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461 $farray[$findex]{"temp"} = $1 if ($1 ne "NaN");
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462 $farray[$findex]{"humidity"} = $2 if ($2 ne "NaN");
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463 $findex++;
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464 }
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465 }
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466 # XXX Hashify the array into lat/long keys
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467
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468 # This is horrible :S
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469 my $fcrap = $fdata->{"om:featureOfInterest"}{"sams:SF_SpatialSamplingFeature"}{"sams:shape"}{"gml:MultiPoint"}{"gml:pointMember"};
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470 foreach my $fnode (@{$fcrap})
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471 {
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472 my $floc = $fnode->{"gml:Point"};
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473 if ($floc->{"gml:pos"} =~ /^\s*([\+\-]?\d+\.\d*)\s+([\+\-]?\d+\.\d*)\s*$/)
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474 {
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475 my ($flat, $flong) = ($1, $2);
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476 # Should use a hash -
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477 foreach my $flol (@farray)
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478 {
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479 if ($flol->{"lat"} == $flat && $flol->{"long"} == $flong)
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480 {
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481 $weatherdata->{$floc->{"gml:name"}} =
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482 [
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483 1,
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484 $flol->{"time"},
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485 $flol->{"temp"},
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486 "",
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487 "",
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488 defined($flol->{"humidity"}) ? $flol->{"humidity"} : "",
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489 ];
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490 }
189
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491 }
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492 }
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493 }
208
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494 } else {
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495 # defined
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496 print STDERR "Invalid XML received:\n";
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497 print STDERR $res->decoded_content."\n\n";
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498 }
208
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499 } else {
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500 print STDERR "Error fetching FMI XML: ".$res->status_line."\n";
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501 }
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db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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502 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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503
164
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504
178
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505 ###
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db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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506 ### Output
178
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507 ###
164
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508 if (opt_chk_valid("outfile", 1)) {
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509 open(STDOUT, '>', opt_get("outfile")) or die("Could not open output file '".opt_get("outfile")."'.\n");
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db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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510 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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511
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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512 binmode STDOUT, ':encoding(utf-8)';
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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513
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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514 foreach my $key (sort { $a cmp $b } keys %$weatherdata)
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
Matti Hamalainen <ccr@tnsp.org>
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515 {
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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516 print STDOUT $key."|".join("|", @{$weatherdata->{$key}})."\n";
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
Matti Hamalainen <ccr@tnsp.org>
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517 }
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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parents:
diff changeset
518
db2b1f74d994 Initial import of weather data fetching backend, written in Perl.
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519 close(STDOUT);