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extract complex data from html table rows

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# 1  
Old 04-23-2012
extract complex data from html table rows
I have bash, awk, and sed available on my portable device. I need to extract 10 fields from each table row from a web page that looks like this:
Code:
</tr>

    <tr>
    <td>28 Apr</td>
    <td><a href="flaredetails.asp?SatID=24907&lat=30&lng=10&alt=0&loc=Home&TZ=CST&Date=41027.779556738&Mirror=2">13:42:34</a></td>
    <td align=center>-5</td>
    <td align=right>59°</td>
    <td align=right>143° (SE )</td>
    
        <td align=right>7.3 km (E)</td>
        <td align=center>-8</td>
    
    <td align=left><a href="satinfo.aspx?SatID=24907&lat=30&lng=10&alt=0&loc=Home&TZ=CST">Iridium 22</a></td>
    </tr>
    
    <tr>. . .

To pull out this data:
Code:
28 Apr, 30, 10, Home, 41027.77955673, 13:42:34, -5, 59, 143, Iridium 22

This is a template of the row:
Code:
<tr><td>$date</td><td><a href="https://www.unix.com/shell-programming-scripting/flaredetails.asp?SatID=.....&lat=$lat&lng=$lng&alt=0&loc=$loc&TZ=CST&Date=$jdate&Mirror=2">$time</a></td><td align=center>$mag</td><td align=right>$alt°</td><td align=right>$azm°...</td><td align=right>...</td><td align=center>...</td><td align=left><a href="https://www.unix.com/shell-programming-scripting/...">$irsat</a></td></tr>

Where the $vars will be used as follows:
Code:
Description=$irsat $mag $date $time
Locationname=$loc
Longitude=$lng
Latitude=$lat
JulianDate=$jdate
DisplayCenterLat=$alt
DisplayCenterLong=$azm

Each row is a separate file

Any thoughts?? If I could only a few of them it would be a great start.

Thanks
Webpage is heavens-above.com/iridium.asp?Dur=7&lat=30&lng=10
Last edited by Scrutinizer; 04-23-2012 at 03:52 PM.. Reason: Added code tags
# 2  
Old 04-23-2012
Try this:

Code:
awk -F'[=&><°]' '
/[ \t]*<td>[^<]*<\/td>/&&!date {date=$3}
/flaredetails.asp/ { lat=$8 ; lng=$10 ; loc=$14 ; jdate=$18 ; time=$21 }
/center/&&time&&!mag{mag=$4}
/right/&&alt&&!azm{azm=$4}
/right/&&mag&&!alt{alt=$4}
/satinfo.aspx/ {
  print date, lat, lng, loc, jdate, time, mag, alt, azm, $18
  date=mag=azm=alt=x;
}' OFS=", " infile

Last edited by Chubler_XL; 04-23-2012 at 09:17 PM..
This User Gave Thanks to Chubler_XL For This Post:
rickgtx
# 3  
Old 04-23-2012
Thank you so much! This would have taken me weeks to learn to do.

The 1st date does not show and I need to strip the degree symbol, &_#176;, and compass directions (NNE)
heavens-above.com/iridium.asp?Dur=7&lat=32.4414&lng=-98.638&loc=Home&alt=500&tz=CST
gives
Code:
Home (, 32.4414, -98.638, Home, 41023.4300358056, 05:19:15, -1, 52�, 231� (SW ), Iridium 82
28 Apr, 32.4414, -98.638, Home, 41027.4616683787, 06:04:48, -6, 23�, 22� (NNE), Iridium 14
28 Apr, 32.4414, -98.638, Home, 41028.1191551022, 21:51:35, -1, 49�, 97� (E  ), Iridium 55

I have much more respect for awk!
Last edited by rickgtx; 04-23-2012 at 10:49 PM.. Reason: degree symbol resolved
# 4  
Old 04-23-2012
Give this update a go:

Code:
awk -F'[=&><\302]' '
/[ \t]*<td>[^<]*<\/td>/&&!time{date=$3}
/flaredetails.asp/ { lat=$8 ; lng=$10 ; loc=$14 ; jdate=$18 ; time=$21 }
/center/&&time&&!mag{mag=$4}
/right/&&alt&&!azm{azm=$4}
/right/&&mag&&!alt{alt=$4}
/satinfo.aspx/ {
  print date, lat, lng, loc, jdate, time, mag, alt, azm, $18
  date=time=mag=azm=alt=x;
}' OFS=", " infile2

This User Gave Thanks to Chubler_XL For This Post:
rickgtx
# 5  
Old 04-23-2012
Perfect!!!!
# 6  
Old 04-24-2012
Hi rickgtx,

I know Chubler_XL already solved the problem, but here other solution using perl and a HTML parser.
Code:
$ cat script.pl
use warnings;
use strict;
use HTML::TreeBuilder;
use LWP::Simple;

my $url = q[http://heavens-above.com/iridium.asp?Dur=7&lat=30&lng=10];

my $tree = HTML::TreeBuilder->new_from_content(
        get( $url ),
);

my @table_data = $tree->look_down(
        q[_tag] => q[tr],
        sub { 
                my $parent = $_[0]->parent();
                return 1 if
                        defined $parent->attr( q[cellpadding] )
                        && $parent->attr( q[cellpadding] ) =~ m/\A\d+\Z/;
        },
);

die qq[Data not found\n] unless @table_data;

for my $row ( 1 .. $#table_data ) {
        my @data;
        for ( $table_data[ $row ]->descendants ) {
                if ( $_->tag eq q[a] ) {
                        my @href;
                        if ( $_->attr( q[href] ) =~ m/\A(?i:flaredetails)/ ) {
                                 @href = $_->attr( q[href] ) =~ m/(?i)(?|lat=(\d+)|lng=(\d+)|loc=([^&]+)|date=([^&]+))/g;
                        }
                        push @data, @href;
                }
                if ( $_->tag() eq q[td] ) {
                        push @data, $_->as_text;
                }
        }

        splice @data, -3, 2;
        for ( @data[-3, -2] ) {
                s/\D.*\Z//;
        }
        @data[1..5] = @data[2..5,1];
        printf qq[%s\n], join q[, ], @data;
}

$ perl script.pl
29 Apr, 30, 10, Unspecified, 41028.8169421883, 21:36:24, -8, 48, 98, Iridium 55
30 Apr, 30, 10, Unspecified, 41029.1509187511, 05:37:19, -2, 16, 22, Iridium 72
01 May, 30, 10, Unspecified, 41030.1468397363, 05:31:27, -5, 15, 22, Iridium 62

# 7  
Old 04-24-2012
@birei
Thank you, but I cannot get perl to run on my iPhone.
Last edited by rickgtx; 04-24-2012 at 10:33 PM.. Reason: Disreguard shell question - got answer
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