[Linux-disciples] Perl pattern matching

[Adam Rosi-Kessel]

I think it has something to do with the way you are invoking perl. Two data
points:

wget -O -
'http://rss.netflix.com/QueueRSS?id=P2020071624879355028177181315700043' |

perl -e "while(<>) { \
   if( m{<item>}..m{</item>} ) { \
     if( m{<title>(.*?)</title>} ) { \
       print "HI STEVE"; \
     } \
   } \
}"

Gives no results.

But:

wget -O netflix.rss \
'http://rss.netflix.com/QueueRSS?id=P2020071624879355028177181315700043'

cat netflix.rss | perlscript.pl

where perlscript is the abovementioned script

works fine.

I would suggest in general doing all of this stuff from within a perl script
rather than fidgeting with pipes and wget output.

Stephen R Laniel wrote:
> Any idea why this isn't working the way I think it should
> work?
> 
> (10:16) slaniel at TheloniousMonk:~$ wget -O - 'http://rss.netflix.com/QueueRSS?id=P2020071624879355028177181315700043' 2>/dev/null |perl -e "while(<>) { \
>   if( m{<item>}..m{</item>} ) { \
>     if( m{<title>(.*?)</title>} ) { \
>       print $1; \
>     } \
>   } \
> }"
> 
> The "$1" bit should, I think, print only the bits of the RSS feed
> that lie between "<title>" and "</title>", but instead I'm
> getting the results below -- which include the </?title>
> bits. Any idea what that's about?
> 
>       <title>1- City of God</title>
>       <title>2- American Splendor</title>
>       <title>3- Capturing the Friedmans</title>
>       <title>4- Spellbound</title>
>       <title>5- Red</title>
>       <title>6- The Decalogue: Disc 1: Films I - III</title>
>       <title>7- The Decalogue: Disc 2: Films IV - VII</title>
>       <title>8- The Decalogue: Disc 3: Films VIII - X</title>
>       <title>9- To Catch a Thief</title>
>       <title>10- The Maltese Falcon</title>
>       <title>11- Batman Begins</title>
>       <title>12- Touching the Void</title>
>       <title>13- Born Into Brothels</title>
>       <title>14- Dark City</title>
>       <title>15- Melinda and Melinda</title>
>       <title>16- Night and Fog</title>
>       <title>17- White</title>
>       <title>18- The Life Aquatic with Steve Zissou</title>
>       <title>19- The Virgin Suicides</title>
>       <title>20- Igby Goes Down</title>
>       <title>21- Bonnie and Clyde</title>
>       <title>22- A Streetcar Named Desire</title>
>       <title>23- Me and You and Everyone We Know</title>
>       <title>24- The Philadelphia Story</title>
>       <title>25- Gaslight</title>
>       <title>26- The Beat That My Heart Skipped</title>
>       <title>27- Ray</title>
>       <title>28- Paris, Texas</title>
>       <title>29- Hiroshima Mon Amour</title>
>       <title>30- Nosferatu: Original Version</title>
>       <title>31- The Last Picture Show</title>
>       <title>32- Crumb</title>
>       <title>33- Serpico</title>
>       <title>34- The French Connection</title>
>       <title>35- Once Upon a Time in the West</title>
>       <title>36- Open City</title>
>       <title>37- The Testament of Dr. Mabuse</title>
>       <title>38- The Trials of Henry Kissinger</title>
>       <title>39- Buena Vista Social Club</title>
>       <title>40- Open Your Eyes</title>
>       <title>41- In the Company of Men</title>
>       <title>42- Sanjuro</title>
>       <title>43- Casablanca</title>
>       <title>44- The King of Comedy</title>
>       <title>45- The Hustler</title>
>       <title>46- The Last Waltz</title>
>       <title>47- Nights of Cabiria</title>
>       <title>48- His Girl Friday</title>
>       <title>49- The Pawnbroker</title>
>       <title>50- Fishing With John</title>
> 
> 
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