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print variable length text from the middle of a line?


 
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# 1  
Old 02-05-2012
print variable length text from the middle of a line?

I am trying to get text from a webpage, in terminal form. So far I am:

1. getting the html for the page printed using curl (curl -s webpage.com), which is then

2. piped to awk, printing line number 29 (awk NR==29), then

3. this is where I am sort of lost. I know where in the printed line I want to start (character 686), but the text I want to print can vary quite a bit in length.

Here is part of the output:

<span style="font-size:14px; color:#347C17">THIS IS THE SECTION I WANT PRINTED</span>

In that example, starting at character 686 (of the full output) would be the capital T. And like I said, that "section" before the </span> can be different lengths.

I believe it is the only set of <span> tags on the line, if that helps at all.

Code:
curl -s webpage.com | awk NR==29 | wtf goes here?


[edit] got it to work, but it looks pretty terrible


Code:
curl -s website.com | awk NR==29 | cut -c 686-750 | tr '\n' '|' | sed "s/\(.*\)<\/span.*/\1/" | tr '|' '\n'


Last edited by darkfalz; 02-05-2012 at 12:30 PM..
# 2  
Old 02-05-2012
If it is the only set of <span> tags on the line, then does this work:

Code:
curl -s website.com | awk 'NR==29 { gsub( "</span>.*", "" ); gsub( ".*>", "" ); print }'

# 3  
Old 02-05-2012
Quote:
Originally Posted by agama
If it is the only set of <span> tags on the line, then does this work:

Code:
curl -s website.com | awk 'NR==29 { gsub( "</span>.*", "" ); gsub( ".*>", "" ); print }'

Hm...tried this, but it didn't output anything.
# 4  
Old 02-05-2012
Try:
Code:
curl -s website.com | awk 'NR==29{len=match ($0,"</")-686;print substr($0,686,len)}'

# 5  
Old 02-05-2012
Quote:
Originally Posted by bartus11
Try:
Code:
curl -s website.com | awk 'NR==29{len=match ($0,"</")-686;print substr($0,686,len)}'

It gives me

Code:
awk: can't open file {len=match ($0,"</")-686;print substr($0,686,len)}
 source line number 1

# 6  
Old 02-05-2012
What version of awk are you running, and under which O/S? If you are on a Solaris box you might want to use nawk or /usr/xpg4/bin/awk (I think that's the path -- I don't have a sun box at hand to check this morning).
# 7  
Old 02-05-2012
Quote:
Originally Posted by agama
What version of awk are you running, and under which O/S? If you are on a Solaris box you might want to use nawk or /usr/xpg4/bin/awk (I think that's the path -- I don't have a sun box at hand to check this morning).
Not a Sun box, just my MacBook Pro running 10.7

awk version 20070501
 

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