Mercurial > hg > egg-tcls
annotate fetch_weather.pl @ 208:c6bbf69afc57
Add some error handling and debugging.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Fri, 15 Aug 2014 10:18:23 +0300 |
parents | 2ac661d551b3 |
children | 5f04ec60e8d9 |
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1 #!/usr/bin/perl -w |
182 | 2 ########################################################################## |
3 # | |
4 # Fetch Weather v0.1 by Matti 'ccr' Hamalainen <ccr@tnsp.org> | |
5 # (C) Copyright 2014 Tecnic Software productions (TNSP) | |
206 | 6 # This script is freely distributable under GNU GPL (version 2) license. |
182 | 7 # |
8 # Should be ran as a cronjob, and configured properly. | |
206 | 9 # */10 * * * * perl -w /absolute/path/to/fetch_weather.pl /path/to/configfile |
182 | 10 # |
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11 # Configuration file example is in fetch_weather.config |
182 | 12 # |
206 | 13 # Requires various Perl modules, in Debian the packages should be: |
14 # libwww-perl libxml-simple-perl libtimedate-perl | |
15 # | |
182 | 16 # |
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; |
189 | 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 |
166 | 26 |
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27 ### |
182 | 28 ### Configuration settings |
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29 ### |
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30 my %settings = ( |
166 | 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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38 |
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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 $_[0]; |
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46 } |
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47 |
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48 |
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49 sub fetch_http($) |
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50 { |
198 | 51 my $agent = LWP::UserAgent->new; |
52 $agent->agent($settings{"http_user_agent"}); | |
208
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53 $agent->timeout(20); |
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54 |
198 | 55 my $req = HTTP::Request->new(GET => $_[0]); |
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56 |
198 | 57 return $agent->request($req); |
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58 } |
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59 |
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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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73 |
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74 |
194 | 75 sub format_time_gmt($) |
189 | 76 { |
77 # 2012-02-27T00:00:00Z | |
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78 return time2str("%Y-%m-%dT%TZ", $_[0], "UTC"); |
189 | 79 } |
80 | |
193 | 81 |
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82 sub str_trim($) |
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83 { |
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84 my $str = $_[0]; |
193 | 85 if (defined($str)) |
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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92 |
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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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102 |
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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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108 |
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109 |
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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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119 |
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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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133 |
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134 |
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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(@{$$tree{"nodes"}}, { "name" => "text", "args" => "", "text" => $token }) if length($token) > 0; |
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165 } |
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166 } |
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167 |
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168 return $tree; |
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169 } |
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170 |
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171 |
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172 sub parse_html($) |
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173 { |
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174 return undef unless defined($_[0]); |
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175 my $str = $_[0]; |
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176 my $res = { "name" => "", "args" => "" }; |
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177 $str =~ tr/\r/ /; |
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178 $str =~ tr/\n/ /; |
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179 my @tokens = grep { !($_ =~ /^\s*$/) } split(/(<\/?[a-zA-Z]+.*?>)/, $str); |
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180 parse_html_tree(\@tokens, $res); |
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181 return $res; |
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182 } |
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183 |
197 | 184 |
158
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185 sub html_find_node($$$); |
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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 ($$node{"name"} eq $name) { |
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201 if ($args ne "") { |
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202 if (defined($$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($$node{"nodes"}, $name, $args); |
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210 } |
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211 } |
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212 } |
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213 } |
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214 return undef; |
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215 } |
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216 |
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217 |
178
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218 ### |
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219 ### Helper functions for locating/traversing nodes |
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220 ### in the parsed data tree structure. |
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221 ### |
158
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222 sub fnode($$) |
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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 |
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227 |
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228 sub fnodea($$$) |
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229 { |
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230 return html_find_node($_[0], $_[1], $_[2]); |
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231 } |
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232 |
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233 |
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234 sub get_node($$$) |
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235 { |
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236 return defined($_[0]->[$_[2]]{"nodes"}[0]{$_[1]}) ? $_[0]->[$_[2]]{"nodes"}[0]{$_[1]} : ""; |
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237 } |
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238 |
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239 |
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240 ### |
178
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241 ### Configuration handling |
164
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242 ### |
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243 sub opt_chk_bool($) |
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244 { |
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245 if (defined($settings{$_[0]})) |
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246 { |
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247 my $val = $settings{$_[0]}; |
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248 return ($val == 1 || $val eq "true" || $val eq "on" || $val eq "1"); |
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249 } |
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250 else |
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251 { |
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252 return 0; |
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253 } |
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254 } |
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255 |
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256 |
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257 sub opt_chk_valid($$) |
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258 { |
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259 if (defined($settings{$_[0]})) |
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260 { |
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261 my $val = $settings{$_[0]}; |
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262 return length($val) >= $_[1]; |
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263 } |
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264 else |
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265 { |
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266 return 0; |
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267 } |
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268 } |
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269 |
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270 |
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271 sub opt_get($) |
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272 { |
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273 if (defined($settings{$_[0]})) |
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274 { |
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275 return $settings{$_[0]}; |
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276 } |
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277 else |
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278 { |
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279 return undef; |
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280 } |
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281 } |
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282 |
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283 |
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284 sub opt_read_config($) |
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285 { |
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286 my $filename = $_[0]; |
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287 my $errors = 0; |
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288 my $line = 0; |
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289 |
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290 open(CONFFILE, "<", $filename) or die("Could not open configuration '".$filename."'!\n"); |
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291 while (<CONFFILE>) |
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292 { |
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293 $line++; |
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294 chomp; |
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295 if (/(^\s*#|^\s*$)/) { |
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296 # Ignore comments and empty lines |
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297 } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*(\d+),?\s*$/) { |
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298 my $key = lc($1); |
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299 my $value = $2; |
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300 if (defined($settings{$key})) { |
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301 $settings{$key} = $value; |
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302 } else { |
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303 mlog("[$filename:$line] Unknown setting '$key' = $value\n"); |
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304 $errors = 1; |
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305 } |
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306 } elsif (/^\s*\"?([a-zA-Z0-9_]+)\"?\s*=>?\s*\"(.*?)\",?\s*$/) { |
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307 my $key = lc($1); |
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308 my $value = $2; |
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309 if (defined($settings{$key})) { |
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310 $settings{$key} = $value; |
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311 } else { |
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312 mlog("[$filename:$line] Unknown setting '$key' = '$value'\n"); |
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313 $errors = 1; |
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314 } |
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315 } else { |
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316 mlog("[$filename:$line] Syntax error: $_\n"); |
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317 $errors = 1; |
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318 } |
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319 } |
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320 close(CONFFILE); |
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321 return $errors; |
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322 } |
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323 |
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324 |
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325 ### |
158
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326 ### Main program begins |
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327 ### |
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328 my $weatherdata = {}; |
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329 |
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330 die( |
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331 "Weather Fetch v0.1 by ccr/TNSP <ccr\@tnsp.org>\n". |
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332 "Usage: $0 <config file>\n" |
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333 ) unless scalar(@ARGV) >= 1; |
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334 |
178
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335 my $cfgfile = shift; |
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336 opt_read_config($cfgfile) == 0 or die("Errors while parsing configuration file '".$cfgfile."'.\n"); |
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337 |
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338 |
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339 ### |
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340 ### Fetch tiehallinto road weather measurement data |
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341 ### |
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342 if (opt_chk_bool("opt_tiehallinto")) |
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343 { |
164
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344 for (my $i = 1; $i <= 22; $i++) |
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345 { |
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346 my $res = fetch_http("http://alk.tiehallinto.fi/alk/tiesaa/tiesaa_maak_".$i.".html"); |
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347 if ($res->code >= 200 && $res->code <= 201) |
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348 { |
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349 my $data = $res->decoded_content; |
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350 |
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351 # Filter out crap tags we don't want or need |
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352 $data =~ s/\n/§/g; |
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353 $data =~ s/<!--.*?-->//ig; |
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354 $data =~ s/<map[^>]*>.*?<\/map>//ig; |
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355 $data =~ s/<form[^>]*>.*?<\/form>//ig; |
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356 $data =~ s/<script[^>]*>.*?<\/script>//ig; |
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357 $data =~ s/<meta[^>]*>//ig; |
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358 $data =~ s/<font[^>]*>//ig; |
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359 $data =~ s/<\/font>//ig; |
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360 $data =~ s/<span[^>]*>//ig; |
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361 $data =~ s/<\/span>//ig; |
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362 $data =~ s/<\/?b>//ig; |
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363 |
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364 $data =~ s/<br>//ig; |
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365 $data =~ s/ / /ig; |
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366 $data =~ s/§/\n/g; |
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367 |
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368 # Parse the HTML mess |
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369 my $otree = parse_html($data); |
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370 |
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371 # Find our desired element nodes |
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372 my $odata = fnodea(fnode($otree, "body"), "div", "class=elementc"); |
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373 my $oupdate = fnode($odata, "p"); |
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374 my $time_base = str2time("00:00"); |
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375 if ($oupdate) { |
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376 my $tmp = $oupdate->{"nodes"}[0]{"text"}; |
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377 if ($tmp =~ /:\s+(\d\d)\.(\d\d)\.(\d\d\d\d)\s+(\d\d:\d\d)/) { |
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378 $time_base = str2time($3."-".$2."-".$1); |
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379 } |
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380 } |
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381 |
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382 my $oelems = fnode($odata, "table")->{"nodes"}; |
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383 for (my $n = 1; $n < scalar(@$oelems); $n++) |
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384 { |
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385 my $fdata = @$oelems[$n]->{"nodes"}; |
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386 $weatherdata->{$fdata->[0]{"nodes"}[0]{"text"}} = |
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387 [ |
201 | 388 0, |
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389 parse_timestamp(get_node($fdata, "text", 1), $time_base), |
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390 get_node($fdata, "text", 2), |
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391 get_node($fdata, "text", 3), |
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392 get_node($fdata, "text", 4), |
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393 ]; |
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394 } |
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395 } |
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396 } |
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397 } |
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398 |
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399 |
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400 ### |
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401 ### Fetch FMI data |
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402 ### |
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403 if (opt_chk_bool("opt_fmi")) |
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404 { |
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405 die("FMI data scrape enabled, but no API key set.\n") unless opt_chk_valid("fmi_api_key", 10); |
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406 |
189 | 407 my $uri = "http://data.fmi.fi/fmi-apikey/".opt_get("fmi_api_key"). |
408 "/wfs?request=getFeature&storedquery_id=fmi::observations::weather::". | |
409 "multipointcoverage". | |
410 # "timevaluepair". | |
194 | 411 "&starttime=".format_time_gmt(time() - 10*60)."&endtime=".format_time_gmt(time()). |
189 | 412 "¶meters=temperature,humidity&maxlocations=50&bbox=19,59,32,70"; |
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413 |
189 | 414 print STDERR "FMI URI: ".$uri."\n" if opt_chk_bool("debug"); |
415 | |
416 my $res = fetch_http($uri); | |
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417 if ($res->code >= 200 && $res->code <= 201) |
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418 { |
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419 my $xml = XMLin($res->decoded_content); |
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420 my $time_base = time(); |
189 | 421 |
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422 if (defined($xml->{"wfs:member"}{"omso:GridSeriesObservation"})) |
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423 { |
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424 my $fdata = $xml->{"wfs:member"}{"omso:GridSeriesObservation"}; |
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425 my $fshit = $fdata->{"om:result"}{"gmlcov:MultiPointCoverage"}; |
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426 my @farray = (); |
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427 |
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428 foreach my $fline (split(/\n/, $fshit->{"gml:domainSet"}{"gmlcov:SimpleMultiPoint"}{"gmlcov:positions"})) |
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429 { |
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430 if ($fline =~ /^\s*([\+\-]?\d+\.\d*)\s+([\+\-]?\d+\.\d*)\s+(\d+)\s*$/) |
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431 { |
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432 push(@farray, {"lat" => $1, "long" => $2, "time" => $3}); |
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433 } |
169
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434 } |
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435 |
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436 my $findex = 0; |
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437 foreach my $fline (split(/\n/, $fshit->{"gml:rangeSet"}{"gml:DataBlock"}{"gml:doubleOrNilReasonTupleList"})) |
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438 { |
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439 if ($fline =~ /^\s*([\+\-]?\d+\.\d*|NaN)\s+([\+\-]?\d+\.\d*|NaN)\s*$/) |
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440 { |
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441 $farray[$findex]{"temp"} = $1 if ($1 ne "NaN"); |
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442 $farray[$findex]{"humidity"} = $2 if ($2 ne "NaN"); |
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443 $findex++; |
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444 } |
189 | 445 } |
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446 # XXX Hashify the array into lat/long keys |
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447 |
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448 # This is horrible :S |
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449 my $fcrap = $fdata->{"om:featureOfInterest"}{"sams:SF_SpatialSamplingFeature"}{"sams:shape"}{"gml:MultiPoint"}{"gml:pointMember"}; |
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450 foreach my $fnode (@{$fcrap}) |
189 | 451 { |
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452 my $floc = $fnode->{"gml:Point"}; |
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453 if ($floc->{"gml:pos"} =~ /^\s*([\+\-]?\d+\.\d*)\s+([\+\-]?\d+\.\d*)\s*$/) |
189 | 454 { |
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455 my ($flat, $flong) = ($1, $2); |
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456 # Should use a hash - |
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457 foreach my $flol (@farray) |
189 | 458 { |
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459 if ($flol->{"lat"} == $flat && $flol->{"long"} == $flong) |
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460 { |
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461 $weatherdata->{$floc->{"gml:name"}} = |
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462 [ |
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463 1, |
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464 $flol->{"time"}, |
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465 $flol->{"temp"}, |
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466 "", |
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467 "", |
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468 defined($flol->{"humidity"}) ? $flol->{"humidity"} : "", |
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469 ]; |
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470 } |
189 | 471 } |
472 } | |
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473 } |
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474 } else { |
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475 # defined |
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476 print STDERR "Invalid XML received:\n"; |
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477 print STDERR $res->decoded_content."\n\n"; |
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478 } |
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479 } else { |
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480 print STDERR "Error fetching FMI XML: ".$res->status_line."\n"; |
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481 } |
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482 } |
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483 |
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484 |
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485 ### |
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486 ### Output |
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487 ### |
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488 if (opt_chk_valid("outfile", 1)) { |
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489 open(STDOUT, '>', opt_get("outfile")) or die("Could not open output file '".opt_get("outfile")."'.\n"); |
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490 } |
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491 |
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492 binmode STDOUT, ':encoding(utf-8)'; |
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493 |
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494 foreach my $key (sort { $a cmp $b } keys %$weatherdata) |
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495 { |
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496 print STDOUT $key."|".join("|", @{$weatherdata->{$key}})."\n"; |
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497 } |
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498 |
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499 close(STDOUT); |