Add the ability to select attribute values.
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@ -6,14 +6,15 @@ Perl script to monitor RSS feeds and execute scripts.
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The config file is stored in `~/.config/rss-watch/config`. Example configuration file:
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```cfg
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[feed "FeedName"]
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[feed FeedName]
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url = https://rss.example.com/
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script = /home/user/script_to_exec.sh '$title' '$link'
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script = /home/user/script_to_exec.sh '$title' '$link' '$guid<isPermaLink>'
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```
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This will query the url specified by the `url` key for an RSS feed and execute the given script with the arguments `title` and `link` from the feed.
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Attributes can be selected by enclosing the attribue key in `<>` characters. For example, to select the `isPermaLink` attribute of the `guid` key, the selector would be `$guid<isPermaLink>`.
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Multiple script keys can be specified on new lines, which will all be executed.
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Only new entries will be acted on. The file `~/.local/share/rss-watch/latest/{FeedName}` will store the last `guid` value from the feed.
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Only new entries will be acted on. The file `~/.local/share/rss-watch/latest/FeedName` will store the last `guid` value from the feed.
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Use cron, or other tools to run this script periodically.
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71
rss-watch.pl
71
rss-watch.pl
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@ -12,6 +12,7 @@ my $CONFIG_FILE = "$ENV{HOME}/.config/rss-watch/config";
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my $LATEST_DIR = "$ENV{HOME}/.local/share/rss-watch/latest";
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my %LATEST;
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my %CONFIG;
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my $OPT_IGNORE_LAST = 0;
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my $XPARSER = XML::Parser->new(Style => 'Tree');
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sub item2hash {
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@ -19,14 +20,23 @@ sub item2hash {
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my %ret = ();
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for (my $i = 1; $i < scalar @$xml; $i+=2) {
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#if (ref($xml->[$i]) eq "ST
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my $key = $xml->[$i];
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next if $key eq 0;
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# index 0 is the attributes, or empty
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# index 1 is text value or empty
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my @val_arr;
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#print("Key: $key\n");
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my $val = $xml->[$i+1];
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next if $val->[1] != 0; # only store string values here
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$ret{$key} = $val->[2];
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# Copy the attributes
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push(@val_arr, $val->[0]);
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if (scalar @$val >= 3 && $val->[1] == 0) {
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# Type is a string, copy that as well
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push(@val_arr, $val->[2]);
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}
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$ret{$key} = \@val_arr;
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}
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#print(Dumper(\%ret));
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return \%ret;
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}
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@ -173,12 +183,36 @@ sub exec_script {
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foreach my $cmdRef (@$cmdArr) {
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my $cmd = $cmdRef; # Copy it
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while ($cmd =~ /[^\\]\$([\w:]+)/g) {
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my $key = $1;
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#print("Matched: $key\n");
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next if not exists $xmlitem->{$key};
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my $escaped_val = sh_escape($xmlitem->{$key});
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$cmd =~ s/\$$key/$escaped_val/;
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while ($cmd =~ /[^\\]\$([\w:<>]+)/g) {
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my $fullmatch = $1;
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my $key;
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my $attr;
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if ($fullmatch =~ /^(.*?)<(.*?)>/) {
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# If key specifies an attribute
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$key = $1;
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$attr = $2;
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} else {
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$key = $1;
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}
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#print("Matched: $key with attr: $attr\n");
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if (not exists $xmlitem->{$key}) {
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print("No xml entry with key: '$key' found. Skipping\n");
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next;
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}
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my $val;
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if ($attr) {
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# We want the attribue's value, not the contents of the tag
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if (not exists $xmlitem->{$key}[0]->{$attr}) {
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print("No xml attribute entry with key: '$key' and attr: '$attr' found. Skipping\n");
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next;
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}
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$val = $xmlitem->{$key}[0]->{$attr};
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} else {
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$val = $xmlitem->{$key}[1];
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}
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#print("Using: $val\n");
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my $escaped_val = sh_escape($val);
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$cmd =~ s/\$$fullmatch/$escaped_val/;
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}
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qx($cmd);
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@ -207,7 +241,7 @@ sub handle_feed {
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foreach (@$items) {
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my $item_hash = item2hash($_);
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if (defined($LATEST{$fname}) and $LATEST{$fname} eq $item_hash->{guid}) {
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if ($OPT_IGNORE_LAST == 0 && defined($LATEST{$fname}) and $LATEST{$fname} eq $item_hash->{guid}[1]) {
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# Stop if we reached the last handled item
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# or if there is no 'last' defined
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$last_hit = 1;
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@ -215,7 +249,7 @@ sub handle_feed {
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}
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push(@item_hashes, $item_hash);
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}
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my $lastid = $item_hashes[0]->{guid};
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my $lastid = $item_hashes[0]->{guid}[1];
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#print(Dumper(\@item_hashes));
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if (not defined($lastid)) {
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if ($last_hit) {
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@ -228,7 +262,7 @@ sub handle_feed {
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}
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}
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if (not defined($LATEST{$fname})) {
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if ($OPT_IGNORE_LAST == 0 && not defined($LATEST{$fname})) {
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# This is most likely the first run, do not run all of the backlog
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# only the items after this one
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$LATEST{$fname} = $lastid;
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@ -247,7 +281,9 @@ sub handle_feed {
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exec_script($feed, $_);
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}
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save_latest($fname);
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if ($OPT_IGNORE_LAST == 0) {
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save_latest($fname);
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}
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return 1;
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}
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@ -260,17 +296,24 @@ if (! -f $CONFIG_FILE) {
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exit 1;
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}
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# Undocumented debug option
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$OPT_IGNORE_LAST = scalar @ARGV >= 1 && $ARGV[0] eq "-d";
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parse_config();
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#print(Dumper(\%CONFIG));
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#exit;
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parse_latest();
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my $ua = LWP::UserAgent->new();
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$ua->agent('RssWatch');
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#print(Dumper(\%CONFIG));
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foreach (@{$CONFIG{feeds}}) {
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my $item = $_;
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my $resp = $ua->get($item->{url});
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next if not $resp->is_success;
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if (not $resp->is_success) {
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print("Failed to GET url: '$item->{url}' status: ", $resp->status_line, "\n");
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next;
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}
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my $fret = handle_feed($resp->decoded_content, $item);
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if (not $fret) {
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