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    Downloading Data Points

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    • V
      Victorino
      last edited by

      I'm trying to figure out how download a csv file of some data points with curl or wget to be presented on a different system. The customViewExample.jsp only provides four examples and I can't figure out how to retrieve historical data.

      A csv file can be manually downloaded from the watch list or reports but I need to automate the download process.

      Any help would be greatly appreciated.

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      • C
        craig
        last edited by

        @Victorino said:

        I'm trying to figure out how download a csv file of some data points with curl or wget to be presented on a different system. The customViewExample.jsp only provides four examples and I can't figure out how to retrieve historical data.

        A csv file can be manually downloaded from the watch list or reports but I need to automate the download process.

        Any help would be greatly appreciated.

        I have a script which can save the .csv file attached to an e-mail. then you can set up a report to be e-mailed and then retrieve the data using POP3.

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        • C
          craig
          last edited by

          You have to set up a scheduled report which send the data via email, then this script checks the e-mail and saves the attached CSV file. It has been working well for me.

          
          #!/usr/bin/perl -w
          #
          # v1.0 February 2009-August 14th 2009.
          #
          # The purpose of this script is to save attachments from emails to an FTP server.
          #
          # The targeted attachments are plain text comma separated value (CSV) files. They
          # are generated by  (mango). The subject of the message must match
          # a format specified in the script. The messages are removed from the POP3 server.
          #
          # The script removes some columns and does some quoting and escaping on the data
          # to make more robust CSV files (ie can handle a , in the data as well as ")
          #
          # The script reformats the dates as per the requested  format.
          #
          # The CSV files are saved locally in localDataDir as well as FTP'd to 2 servers.
          # An error email is generated if there aren't the correct number and intervals
          # of data. 15 minute data is expected.
          ################################################################################
          
          
          
          use strict;
          use Net::FTP;
          use Mail::POP3Client;
          use MIME::Parser;
          use Time::Local;
          use MIME::Lite;
          use Text::CSV_XS;
          
          # define login credentials for POP3 server to retrieve email from
          my $pop3Username    = '';
          my $pop3Password    = "";
          my $pop3Server      = "";
          
          
          # first FTP server to send CSV files to
          my $ftpServer = "";
          my $ftpPassword = "";
          my $ftpUsername = "";
          my $ftpDir       = "Data";
          
          # second FTP server to send files to
          my $ftpServer2   = "";
          my $ftpPassword2 = "";
          my $ftpUsername2 = "";
          my $ftpDir2       = "";
          
          # a writeable directory in which to store temporary files
          my $temp_dir = "/usr/home/foo";
          
          # a writeable directory in which to store a copy of the data that is FTPd
          my $localDataDir = "/usr/home/foo";
          
          
          ################################################################################
          ################################################################################
          ################################################################################
          
          my @csvFile;
          my $fh;
          my @tempFiles;
          my @outFiles;
          my @wiers;
          my $time = timelocal( localtime() );
          
          my $error      = 0;
          my $error_text = "";
          
          print "Content-type: text/html\n\n";
          &log("Running Email to FTP script\n");
          
          my $pop = new Mail::POP3Client(
          	USER     => $pop3Username,
          	PASSWORD => $pop3Password,
          	HOST     => $pop3Server
          );
          
          my $message = $pop->Message();
          if ( !$pop->Alive() ) {
          	$error = 1;
          	&log("Error connecting to POP server $pop3Server\n");
          	&exitLog( $message . "\n" );
          }
          
          my $emails = $pop->Count();
          
          &log("Have $emails emails to process\n");
          for ( my $i = 1 ; $i <= $emails ; $i++ ) {
          	foreach ( my $header = $pop->Head($i) ) {
          
          		chomp($header);
          		$header =~ /Subject:\s+(.*)/;
          		my $subject = $1;
          		chomp($subject);
          		$subject =~ s/(\r|\n)//g;
          
          		if (   # $header =~ /From:(.*)scada/ &&
          			 $header =~ /Subject: (.*) Published FTP Data/ )
          		{
          			my $wier = $1;    
          			$wier =~ s/^\s+//g;
          			$wier =~ s/\/s+$//g;
          			chomp($wier);
          
          			my $tempFileName = $temp_dir . $time . "-" . $i;
          			open( $fh, ">$tempFileName" )
          				or &errorlog("Can't open temp file $tempFileName for saving pop3 mail message body: $!\n ");
          
          			$pop->RetrieveToFile( $fh, $i );
          			close $fh;
          			push( @tempFiles, $tempFileName );
          			push( @wiers,     "$wier" );
          			&log("Matched email $i subject $subject. Saved message for $wier\n");
          			
          			# delete message from server since we have saved it to temp file
          			$pop->Delete($i);
          		}
          		else {
          			&log( "leaving non matching message " . $subject . "\n" );
          		}
          	}
          }
          $pop->Close();
          
          # ok now we have retrieved file which is a multipart mime mess.
          
          foreach my $tempFile (@tempFiles) {
          	my $wier = shift @wiers;
          	if ( $wier !~ /\w+/ ) {
          		$wier  = "defaultSource";
          		$error = 1;
          		&log("ERROR: unable to parse report name from subject. Using default\n"	);
          	}
          	my $mp = new MIME::Parser;
          	$mp->tmp_to_core(1);
          	$mp->output_to_core(1);
          	my $fh2;
          	open( $fh2, "$tempFile" ) 
          		or &errorLog("Couldn't open saved email message $tempFile , $!\n");
          	$mp->output_dir($temp_dir);
          	my $entity = $mp->parse($fh2);
          	
          
          	#$entity->dump_skeleton();
          
          	foreach my $part ( $entity->parts ) {
          		my $head     = $part->head;
          		my $type     = $head->mime_type;
          		my $filename = $head->recommended_filename;
          
          		if ( $type eq "text/csv" ) {   
          			if ( !$part->bodyhandle ) {
          				&errorLog("ERROR: unable to get MIME bodyhandle for CSV content-part\n");
          				next;
          			}
          
          			if ( $filename =~ /Events\.csv$/ ) {
          				&log("Skipping events file $filename\n");
          				next;
          			}
          			@csvFile = $part->bodyhandle->as_lines;
          			&log(   "processing file \"$filename\", has "
          				  . ( $#csvFile + 1)
          				  . " lines.\n" );
          
          			# now have an array of arrays(which are the lines in the csv file)
          
          			# want to leave some columns out, which have the heading "annotation"
          			my @keepFields;
          			if (defined($csvFile[0])) {
          				# this is the first line in the csv file which is the heading.
          				my @fields = split( ",", $csvFile[0] );
          				my $fieldNo = 0;
          				foreach my $field (@fields) {
          					if ($field !~ /Annotation/) {
          						#this is a column we want to keep
          						push(@keepFields, $fieldNo);
          						#&log("keeping column $fieldNo $field\n");
          					}
          					$fieldNo++;
          				} 
          			}
          
          			#my $csv = Text::CSV_XS->new ();          # create a new object
          			my $csv = Text::CSV_XS->new ({allow_loose_quotes  => 1, escape_char => "\\"});          # create a new object
          
          			my @newCsvFile;
          			my $lastMinute="";
          			my $thisMinute="";
          			my $lastInterval="";
          			my $lineNo = 0;
          			foreach my $line (@csvFile) {
          				$line =~ s/(\r|\n)//g; 			# strip new lines
          				my $status  = $csv->parse($line);       # parse a CSV string into fields
           				my @fields = $csv->fields();           # get the parsed fields
          
          				# files come with wrong dateformat. change it to as requested.
          				# comes as "yyyy/MM/dd HH:mm:ss"
          				# change to "yyyyMMdd HHmmss"
          				# just parse out / and :
          
          				if (!defined($fields[0])) {
          					&errorLog("undefined date field. csv parse status was $status. skipping rest of file.");
          					&errorLog("data: parsed $fields[0] from $line\n");
          					last; # skip the rest of this file.
          					
          				}
          				my $newdate = $fields[0];
          				
          				if ($lineNo > 0 && $filename !~ /UserComments\.csv$/ ) {
          					# on rows other than the header, make sure that this interval is 15 minutes ahead of the last one
          					$newdate =~ /\d+\/\d+\/\d+\s+\d+:(\d+):\d+/;
          					$thisMinute = $1;
          					my $dateOK = 0;
          					if ($lastMinute ne "" ) {
          						# not the first time through the loop.
          						if ($lastMinute eq "00" && $thisMinute eq "15") {
          							$dateOK = 1;
          						}
          						if ($lastMinute eq "15" && $thisMinute eq "30") {
          							$dateOK = 1;
          						}
          						if ($lastMinute eq "30" && $thisMinute eq "45") {
          							$dateOK = 1;
          						}
          						if ($lastMinute eq "45" && $thisMinute eq "00") {
          							$dateOK =1;
          						}
          						if ($dateOK != 1) {
          							&missingInterval($lastInterval, $newdate, $lineNo);
          						}
          					}
          					$lastMinute = "$thisMinute";
          					$lastInterval = "$newdate";
          				}
          
          				$newdate =~ s/\///g;
          				$newdate =~ s/://g;
          				$fields[0] = $newdate;
          				
          				my @columns;
          				push(@columns, $fields[0]);
          				for (my $x = 1; $x <= $#keepFields; $x++) {
          					push(@columns, $fields[$keepFields[$x]]);
          				}
           				$status  = $csv->combine (@columns);  # combine columns into a string
           				my $csvLine    = $csv->string ();           # get the combined string				
          				push(@newCsvFile, $csvLine . "\n");
          				$lineNo++;
          			}
          
          			if ( defined($newCsvFile[1]) ) {
          				my @fields        = split( ",", $newCsvFile[1] );
          				my $firstFileDate = $fields[0];
          				#&log("Have $firstFileDate as date from $newCsvFile[1]\n");
          				# remove leading spaces just in case, then remove all numbers (the time) after a space
          				$firstFileDate =~ s/\"//g;
          				$firstFileDate =~ s/^\s+//g;
          				$firstFileDate =~ s/ \d+//g;
          
          				&validate(@newCsvFile);
          
          				my $outFileName;
          				if ( $filename =~ /UserComments\.csv$/ ) {
          					#this is a user comments file
          					$outFileName = $wier . "-UserComments-$firstFileDate.csv";
          				}
          				else {
          		 			 # it isn't an events file as we skipped those, so it must be wier data
          					$outFileName = $wier . "-" . $firstFileDate . ".csv";
          					if ( $#newCsvFile != 96 ) { 
          						&errorLog("$outFileName had $#newCsvFile rows instead of 96.\n");
          					}
          				}
          				$outFileName = $localDataDir . $outFileName;
          				my $ofh;
          				open( $ofh, ">" . $outFileName )
          				  or &exitLog("Couln't open $localDataDir/$outFileName for writing: $!\n" );
          				print $ofh @newCsvFile;
          				close $ofh;
          				push( @outFiles, $outFileName );
          				&log("wrote csv file $outFileName successfully.\n");
          			}
          			else {
          				if ( $filename !~ /UserComments\.csv$/ ) {
          					&errorLog("skipping csv file with less than 2 lines ($#newCsvFile): $filename\n");
          				}
          			} # end if more than 1 lines in CSV file
          
          		} # end if type was csv
          
          	} # end for mime part
          
          	unlink($tempFile);
          } # next tempfile (email message)
          
          
          if (@outFiles > 0) {
          if ($error == 0) {
          # ok now ftp the files away.
          my $ftp = Net::FTP->new( $ftpServer, Debug => 0 )
            or &exitLog("Cannot connect to $ftpServer: $@");
          
          $ftp->login( $ftpUsername, $ftpPassword )
            or &exitLog( "Cannot login to FTP " . $ftp->message );
          
          $ftp->cwd($ftpDir);
          
          foreach my $outFile (@outFiles) {
          	my $remoteFileSize = $ftp->size($outFile);
          
          	if ( defined($remoteFileSize) ) {
          		if ( $remoteFileSize > 0 ) {
          
          		  # file exists, let's assume we are replacing it and delete the old one
          			$ftp->delete($outFile);
          			&log("file exists on FTP, deleting the old $outFile\n");
          		}
          	}
          
          	if ( $ftp->put("$outFile") ) {
          		&log("uploaded $outFile to $ftpServer.\n");
          	}
          }
          $ftp->quit();
          }
          
          # do for  mirror regardless of error.
          # ok now ftp the files away.
          my $ftp2 = Net::FTP->new( $ftpServer2, Debug => 0 )
            or &exitLog("Cannot connect to $ftpServer2: $@");
          
          $ftp2->login( $ftpUsername2, $ftpPassword2 )
            or &exitLog( "Cannot login to FTP " . $ftp2->message );
          
          $ftp2->cwd($ftpDir2);
          
          foreach my $outFile (@outFiles) {
          	my $remoteFileSize = $ftp2->size($outFile);
          
          	if ( defined($remoteFileSize) ) {
          		if ( $remoteFileSize > 0 ) {
          
          		  # file exists, let's assume we are replacing it and delete the old one
          			$ftp2->delete($outFile);
          			&log("file exists on FTP, deleting the old $outFile\n");
          		}
          	}
          	if ( $ftp2->put("$outFile") ) {
          		&log("uploaded $outFile to $ftpServer2.\n");
          	}
          }
          $ftp2->quit();
          }
          if ($error) { &exitLog("Script completed but with errors. Data NOT uploaded FTP2.\n"); }
          
          sub log {
          	my $logText = shift;
          	my ( $sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst ) = localtime(time);
          	$year += 1900;
          	$mon++;
          	if ( $sec < 10) { $sec = "0" . $sec; }
          	if ( $min < 10) { $min = "0" . $min; }
          	if ( $hour < 10) { $hour = "0" . $hour; }
          	if ( $mday < 10) { $mday = "0" . $mday; }
          	if ( $mon < 10) { $mon = "0" . $mon; }
          	
          	my $logTime = $year . "-" .  $mon  . "-$mday $hour:$min:$sec ";
          
          #	open(FH, ">>" . $submissionPath . "submissionLog.txt") or warn "couldn't open logfile in $submissionPath: $!\n" ;#
          	print $logTime . $logText ;
          	$error_text .= $logTime . $logText ;
          
          	#	close FH;
          
          }
          
          
          sub errorLog {
          	my $errText = shift;
          	
          	# set global error flag.
          	$error = 1;
          	&log("ERROR: " . $errText);
          }
          sub exitLog {
          	my $reason = shift;
          	&log($reason);
          
          	# send an email!
          
          	MIME::Lite->send(
          		'smtp', $pop3Server,
          		Timeout  => 60,
          		AuthUser => $pop3Username,
          		AuthPass => $pop3Password
          	);
          	my $msg = MIME::Lite->new(
          		From => 'foo@bar.com',
          		To   => 'foo@bar.com',
          
          		# Cc       =>'foo@bar.com',
          		Subject => ' data FTP script error',
          		Data    =>
          "This email is automatically generated by the script which uploads the  data to the  FTP server daily. It is only meant to be sent if there was a problem.  You may have to manually upload the data!\n\n\n$error_text"
          	);
          	$msg->send();
          
          	print $error_text;
          	
          	exit;
          
          }
          
          
          
          sub missingInterval {
          	my $lastInterval = shift;
          	my $thisInterval = shift;
          	my $lineNo = shift;
          	&log("Missing or incorrect interval at line # $lineNo : $lastInterval, $thisInterval\n");
          	$error =1;
          }
          
          
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