Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

We use an application at $work that uses XML internally for everything. The applications that feed it often wrap the files into a single line, which is a nuisance. vi won't display them, and grep will return the entire file on any match. I've created the code below, based almost entirely on sample code from others, to extract some key information from files.

The first interation (everything below except line 13) worked great until I encountered the namespace prefixes. It didn't take long to find out the solution, but I did not see it implemented in actual code. I guess everybody else thought it was obvious! The Namespaces => 1 in the constructor tells the parser to pull the namespace prefixes from the tag names (they are stored elsewhere), and for my simple example, that's all I need.

Program notes: %interesting is the list of tags the parser will store as it parses the file. The values are stored in the hash %message with the tag as key. In my end handler, I choose a subset of tags based on the document type to display.

#!/home/edi/perl/perl use strict; use warnings; use XML::Parser; my $parser = new XML::Parser( Handlers => { Start => \&hdl_start, End => \&hdl_end, Char => \&hdl_char, Default => \&hdl_def, }, Namespaces => 1); my (%message,$element); my %interesting = map { $_, 1 } qw/shipmentStatus responseToLoadTender customerIdentifier proNum lo +adTenderId eventType eventDate eventTime city seqnum customerId segme +ntId action date/; my $file = shift; $message{file} = $file; $parser->parsefile($file); #print "Placeholder\n"; sub hdl_start { my ($p,$elt,%attr) = @_; $element = $elt; } sub hdl_end { my ($p, $elt) = @_; return unless $interesting{$elt}; if ($elt eq 'shipmentStatus') { if ($message{eventType} !~ m/X6/ ) { printf "%-20s: %s\n", $_, $message{$_} for qw/file proNum loadTenderId city seqnum eventType eventDate + eventTime/; print "\n"; } } if ($elt eq 'responseToLoadTender') { printf "%-20s: %s\n", $_, $message{$_} for qw/file segmentId loadTenderId action date/; print "\n"; } } sub hdl_char { my ($p, $str) = @_; return unless $interesting{$element}; $message{$element} .= $str; } sub hdl_def {}
But God demonstrates His own love toward us, in that while we were yet sinners, Christ died for us. Romans 5:8 (NASB)

In reply to XML::Parser Namespace example by GotToBTru

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others musing on the Monastery: (5)
    As of 2021-04-18 09:48 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found