Re: Yahoo! Groups: Welcome to sed-users. Visit today!

Hey Luigi,

one of sed's problems is dealing with newline characters and you have
your html anchor tags split over new lines. There's probably a smart
way to overcome this using sed (and sed's line buffer), but it's not
an easy alternative.

I think the best way for you is to:

1. remove all the new line characters,or at least don't split tags
with new lines (there are many ways to do this, depending on which
version of sed you are using, could be as easy as # sed -n -e
's/\n//g; p' data.html)

2. remove the surrounding tags from the text that you want in your
anchor attributes with something like:
sed -n -e 's/\(<a[^h]*href="\)\([^"]*\)"\([^>]*>\)/\2/g; p'

3. remove all the other tags, using the sed script you have already.
(You can pipe the output of 2 into 3.)

Hope this helps.

Joe

PS. In general, you can look at some other tools like perl or ruby to
make your life easier.

On Mon, Apr 23, 2012 at 11:21 AM, Luigi Assom <[email protected]> wrote:
> Hi community!
> I subscribed to sed group because I need to do some parsing of txt files
> with html.
> I am totally new to sed, I 've just discovered it yesterday!!
> I tried something (strip all html tag) and I succeed, but I need something
> more complex and I cannot dig it - could you please help with the syntax?
>
> I need to extract URL contained in <a> tags, only the part like /RED/BLUE/
> , and to strip out every other tag, so that I have clean text and only
> THOSE urls.
>
> I made this attempt:
>
> txt structure:
>
>> </b> (Displaying X Results)<table><tr> <td valign="top"><a
>> href="/RED/BLUE/" onClick="(new Image()).src='/url/';"><img src="image.jpg"
>> width="30" height="30" border="0"></a>&nbsp;</td><td align="right"
>> valign="top"><img src="/images/c.gif" width="1" height="6"><br>1.</td><td
>> valign="top"><img src="/images/c.gif" width="1" height="6"><br><a
>> href="/RED/BLUE/" onclick="(new Image()).src='url/';">TEXT TO EXTRACT</a>
>> TEXT TO EXTRACT                 <p class="find-alike">alike "OTHER TEXT TO
>> EXTRACT" - BLABLA <em>(blabla)</em></p>       <p class="find-alike">alike
>> "OTHER TEXT TO EXTRACT" - BALABLA</p>   </td></tr><tr> <td
>> valign="top"><img src="/images/b.gif" alt="" width="23" height="1"></td><td
>> align="right" valign="top">2.</td><td valign="top"><a href="/RED/BLUE/"
>> onclick="(new Image()).src='url/';">TEXT TO EXTRACT</a> TEXT TO EXTRACT
>>               </td></tr>
>>
>
> command:
> sed -e 's/<[^>]*>//g;/</N;//b'
>
> it works, but strip out all tags.
>
> I've tried to customize it, but nothing happened:
> sed -e '/RED/!d;'
>
> I also tried some script on the web but I cannot make them work...
> I even new in using Unix :)
> I am working with macbook sed based.
>
>
> Could you please help out in this task?
> Thank you!
> Luigi
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
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> Yahoo! Groups Links
>
>
>



-- 
joe gain

jacob-burckhardt-str. 16
78464 konstanz
germany

+49 (0)7531 60389

(...otherwise in ???)