On 12/30/2010 09:18 AM Bowie Bailey wrote:
> On 12/30/2010 8:19 AM, ken wrote:
>> Given an HTML file which looks like this:
>>
>> --------- begin snippet ---------
>> <HTML
>>> <HEAD
>>> <TITLE
>>> We've Lied to You…</TITLE
>>> <META
>> NAME="GENERATOR"
>> CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
>> REL="HOME"
>> TITLE="Maximum RPM"
>> HREF="index.html"><LINK
>> REL="UP"
>> TITLE="Using RPM to Verify Installed Packages"
>> HREF="ch-rpm-verify.html"><LINK
>> ...
>> --------- end snippet ---------
>>
>> I'm coding some perl to make it look something like this:
>>
>> --------- begin snippet ---------
>> <html>
>> <head>
>> <title>We've Lied to You…</title>
>>
>> <meta name="generator" content="Modular DocBook HTML Stylesheet Version
>> 1.79">
>>
>> <link rel="HOME" title="Maximum RPM" href="index.html">
>>
>> <line rel="UP" title="Using RPM to Verify Installed Packages"
>> href="ch-rpm-verify.html">
>>
>> <link ....
>> --------- end snippet ---------
>>
>> I've hit a wall trying to remove all the newlines. I've tried it
>> several ways... here's just one:
>>
>> --------- begin snippet ---------
>> while (<$in>)
>> {
>> s/<(\w*\W)/<\L$1/g; # Downcase XXX in "<XXX".
>> s/<\/(\w*\W)/<\/\L$1/g; # Downcase XXX in "</XXX".
>> if(/^>/) # if this line starts with '>'
>> { # then
>> $curr = tell $in; # Note current file position,
>> seek $in, $prev, 0; # go back to previous line,
>> chomp; # remove its trailing newline char,
>> seek $in, $curr, 0; # and reset position to current line.
>> }
>> else
>> {
>> $curr = tell $in; # Note current file position,
>> seek $in, $prev, 0; # go back to previous line
>> s/\n/ /; # Append a space,
>> chop; # and then chomp.
>> seek $in, $curr, 0; # and reset position to current line.
>> }
>> print;
>> print $out;
>> $prev = tell $in; # Location of previous line.
>> }
>> --------- end snippet ---------
>>
>> When I cat the output file, it looks like this:
>>
>> --------- begin snippet ---------
>> GLOB(0x9fd587c)<htmlGLOB(0x9fd587c)><headGLOB(0x9fd587c)><titleGLOB(0x9fd587c)>We've
>> Lied to
>> You…</titleGLOB(0x9fd587c)><metaGLOB(0x9fd587c)NAME="GENERATOR"GLOB(0x9fd587c)CONTENT="Modular
>> DocBook HTML Stylesheet Version
>> 1.79"><linkGLOB(0x9fd587c)REL="HOME"GLOB(0x9fd587c)TITLE="Maximum
>> RPM"GLOB(0x9fd587c)HREF="index.html"><linkGLOB(0x9fd587c)REL="UP"GLOB(0x9fd587c)TITLE="Using
>> RPM to Verify Installed
>> Packages"GLOB(0x9fd587c)HREF="ch-rpm-verify.html"><linkGLOB(0x9fd587c)....
>> --------- end snippet ---------
>>
>> The output I should say *is* all on one line, not line-wrapped the way
>> you see it above. I have a hunch as to why there are the
>> "GLOB(0x9fd587c)" thingies everywhere the newlines or spaces (' ')
>> should be. If some expert here could explain them, that would be really
>> good. More importantly though would be some instruction as to how to
>> remove the newlines without creating all the GLOB(...) garbage. Might I
>> have to rewrite the script so to open the file in binary mode... or what?
>
> So you are trying to remove all of the newlines inside the tags?
>
> I would approach it from the other direction. Remove ALL of the
> newlines and then add back the ones you want.
>
> Something like this (untested):
>
> $irs = $/;
> $/ = undef;
> $html = <$in>;
> $/ = $irs;
>
> $html =~ s/\n/ /g; # Replace all newlines with spaces
> $html =~ s/(<\w+)/\n$1/g; # Add a newline before all begin tags
> print $html . "\n";
>
> This pulls in the whole file before it starts processing, but as long as
> it is not ridiculously huge, this should not be a problem.
Some file this script would need to process could very well be
ridiculously huge, which is why I chose to process line-by-line.
Secondly, yes, I was already using the general strategy of taking out
the newlines (where they're misplaced) and then putting them back in
(where they should be). It was probably difficult to discern that just
from the code.
Thanks for your reply, but it doesn't really address the problem.