Changed to use Claritin.com's JSON service.

code/common/weather_pollen.pl

@@ -1,11 +1,11 @@
 #Category=Weather
 
-#@ This module gets the pollen forecast from wunderground.com and puts the pollen
+#@ This module gets the pollen forecast from Claritin.com and puts the predominant pollen
 #@ type and pollen count into the %Weather hash.
 #@
 #@ Uses mh.ini parameter zip_code
 
-# Get pollen count forecast from wunderground.com and put it and the pollen
+# Get pollen count forecast from Claritin.com and put it and the predominant pollen
 # type into the %Weather hash.
 # Technically there is a 4 day forecast, but I have seen it vary so widely
 # from day 2 and what day 1 will say tomorrow that I don't count on it for
@@ -14,13 +14,13 @@
 #uses mh.ini parameter zip_code=
 #
 #info from:
-#http://www.wunderground.com/DisplayPollen.asp?Zipcode=64119
+#http://www.claritin.com/weatherpollenservice/weatherpollenservice.svc/getforecast/64119
 #
 
 # weather_pollen.pl
 # Original Author:  Kent Noonan
 # Revision:  1.3
-# Date:  07/12/2014
+# Date:  07/14/2014
 
 =begin comment
 
@@ -30,47 +30,43 @@
      David J. Mark - 06/12/2006
  1.2 Updated to use new Trigger design.
      Bruce Winter - 06/25/2006
- 1.3 Updated to use Wunderground instead of Pollen.com because
-     Pollen.com has added annoying countermeasures to prevent
-     screenscraping that would take much more code to parse.  Plus,
-     their encryption scheme could change at anytime, breaking the
-     script again.  Wunderground is perfect in this case because the data is
-     much easier to scrape and they actually receive their pollen data from
-     Pollen.com anyway.  I've also done some general cleanup & added
-     a log message to warn if parsing fails.
-     Jared J. Fernandez - 07/12/2014
+ 1.3 Updated to use the JSON WeatherPollenService from Claratin.com
+     since Pollen.com has added countermeasures to prevent screenscraping
+     that would take much more code to parse.  The WeatherPollenService
+     has a better API that seems to provide the same data as most other
+     online pollen forecasting services.  In addition to switching service
+     providers, I've also done some general cleanup & improvements.
+     Jared J. Fernandez - 07/14/2014
 
 =cut
 
+use JSON qw( decode_json );
+
+my $pollen_file = "$config_parms{data_dir}/web/pollen_forecast.json";
+
 $v_get_pollen_forecast = new Voice_Cmd('[Get,Check] pollen forecast');
-$v_get_pollen_forecast->set_info("Downloads and parses the pollen forecast page from wunderground.com.  The 'check' option reads out the result after parsing is complete.");
+$v_get_pollen_forecast->set_info("Downloads and parses the pollen forecast data.  The 'check' option reads out the result after parsing is complete.");
 
 $v_read_pollen_forecast = new Voice_Cmd('Read pollen forecast');
-$v_read_pollen_forecast->set_info("Reads out the previously fetched pollen forecast");
+$v_read_pollen_forecast->set_info("Reads out the previously fetched pollen forecast.");
 
-$p_pollen_forecast = new Process_Item("get_url http://www.wunderground.com/DisplayPollen.asp?Zipcode=$config_parms{zip_code} $config_parms{data_dir}/web/pollen_forecast.html");
+$p_pollen_forecast = new Process_Item("get_url http://www.claritin.com/weatherpollenservice/weatherpollenservice.svc/getforecast/$config_parms{zip_code} $pollen_file");
 
-&parse_pollen_forecast if $Reload;
+&parse_pollen_forecast if (($Reload) && (-e $pollen_file));
 
 sub parse_pollen_forecast {
-
-	my ($found1,$found2);
-	open(FILE,"$config_parms{data_dir}/web/pollen_forecast.html");
-	while (<FILE>) {
-		if ((/Pollen Type:<\/strong>\s(\w+)\.<\/h3>/) && (!defined($found1))) {
-			$found1 = 1;
-			$main::Weather{TodayPollenType}=$1;
-		} elsif ((/<p>(\d+\.\d+)<\/p>/) && (!defined($found2))) {
-			$found2 = 1;
-			$main::Weather{TodayPollenCount}=$1;
-		}
-		last if ($found1 && $found2);
-	}
-	close(FILE);
-	unless ($found1 && $found2) {
-		warn "Error parsing pollen info.";
+	my @pollen_data = file_read($pollen_file) || warn "Unable to open pollen data file.";
+	# The JSON file that is retuned by the service is malformed; these substitutions clean it up so that the perl JSON module can parse it.
+	for (@pollen_data) {
+		s/\"\{/\{/;
+		s/\\//g;
+		s/\}\"/\}/;
 	}
-
+	my $json = decode_json(@pollen_data) || warn "Error parsing pollen info from file.";
+	$main::Weather{TodayPollenCount} = $json->{pollenForecast}{forecast}[0];
+	$main::Weather{TomorrowPollenCount} = $json->{pollenForecast}{forecast}[1];
+	$main::Weather{TodayPollenType} = $json->{pollenForecast}{pp};
+	$main::Weather{TodayPollenType} =~ s/\.//;
 }
 
 if ($state = said $v_get_pollen_forecast) {
@@ -84,10 +80,8 @@ sub parse_pollen_forecast {
 		$v_get_pollen_forecast->respond("app=pollen Today's pollen count is $main::Weather{TodayPollenCount}. The predominant pollens are from " . lc($main::Weather{TodayPollenType} . "."));
 	}
 	else {
-		$v_get_pollen_forecast->respond("app=pollen Pollen forecast retrieved");
+		$v_get_pollen_forecast->respond("app=pollen Pollen forecast retrieved.");
 	}
-
-
 }
 
 if (said $v_read_pollen_forecast) {