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Text to HTML recipe making
kat_lists at katspace
Dec 19, 2005, 5:50 PM
Post #1 of 12 (5508 views)
Permalink
Hello, I'm new to Embperl (though it seems to be a case of love at first
sight).
I'm trying to get a handle on Recipes and Providers. I gather that
in order for something to be able to be Provided, it needs to have
a Syntax module for it, in order for a Recipe to be able to use it.

What I want to be able to do, is for Embperl to be able to read in
plain text files and convert them to HTML. But I don't want to reinvent
the wheel, since there are perfectly good perl modules which have
already been written to do that (such as HTML::TextToHTML).

But the impression I get from the manuals is that one can't use another
module, that you have to reinvent the wheel and write a Syntax module
in order to parse a plain-text file. Which is Not Good.

Of course, I know that one could sort of do it in a quick-and-dirty
way by reading in the desired plain-text file into a scalar, processing
it with HTML::TextToHTML and then doing whatever you want to it,
but I would like to do it the proper Embperl 2.x way, with Recipes
and Providers, so that it could be reusable and passed on to other
people to use.

Kathryn Andersen
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RE: Text to HTML recipe making [ In reply to ]
richter at ecos
Dec 20, 2005, 12:48 PM
Post #2 of 12 (5352 views)
Permalink
>
> What I want to be able to do, is for Embperl to be able to
> read in plain text files and convert them to HTML. But I
> don't want to reinvent the wheel, since there are perfectly
> good perl modules which have already been written to do that
> (such as HTML::TextToHTML).
>

Unfortunately there are a few lines of C code missing to get this done. It
was always my intention to make such a usage possible, but I didn't got
around until now to implement the last piece :-(

So one possiblilty is that somebody writes this C code.

The other one is to create a syntax module, which uses HTML::TextToHTML for
the actual work.

To do so, just make a copy of Embperl/Syntax/Perl.pm, then in the call to
AddInitCode you would pass some code like:

q{

use HTML::TextToHTML ;

{
local $/ = undef ;
my $text = <DATA> ;

my $html = HTML::TextToHTML::<whatever you want to do> ($text) ;
print OUT $html ;
}

__DATA__

}

Gerald




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Re: Text to HTML recipe making [ In reply to ]
kat_lists at katspace
Dec 20, 2005, 1:21 PM
Post #3 of 12 (5349 views)
Permalink
On Tue, Dec 20, 2005 at 09:48:15PM +0100, Gerald Richter wrote:
> >
> > What I want to be able to do, is for Embperl to be able to
> > read in plain text files and convert them to HTML. But I
> > don't want to reinvent the wheel, since there are perfectly
> > good perl modules which have already been written to do that
> > (such as HTML::TextToHTML).
> >
>
> Unfortunately there are a few lines of C code missing to get this done. It
> was always my intention to make such a usage possible, but I didn't got
> around until now to implement the last piece :-(

Ah. Does this mean that you have now done it? (Sorry, I notice that
German-speakers tend to have problems with using the word "until"
correctly)

> So one possiblilty is that somebody writes this C code.

Ah, so you haven't done it yet.

> The other one is to create a syntax module, which uses HTML::TextToHTML for
> the actual work.
>
> To do so, just make a copy of Embperl/Syntax/Perl.pm, then in the call to
> AddInitCode you would pass some code like:
>
> q{
>
> use HTML::TextToHTML ;
>
> {
> local $/ = undef ;
> my $text = <DATA> ;
>
> my $html = HTML::TextToHTML::<whatever you want to do> ($text) ;
> print OUT $html ;
> }
>
> __DATA__
>
> }

Ah, so this would make the rest-of-the-file the __DATA__ to be read
and processed. Interesting! I'm not entirely sure whether this would
work, since HTML::TextToHTML already makes use of the DATA handle to
read in its own configuration -- I can't remember what happens with
multiple __DATA__ sections in different files.

Still, it certainly can't hurt to try.

Kathryn Andersen
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v |
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RE: Text to HTML recipe making [ In reply to ]
richter at ecos
Dec 20, 2005, 8:17 PM
Post #4 of 12 (5364 views)
Permalink
> >
> > Unfortunately there are a few lines of C code missing to get this
> > done. It was always my intention to make such a usage
> possible, but I
> > didn't got around until now to implement the last piece :-(
>
> Ah. Does this mean that you have now done it? (Sorry, I
> notice that German-speakers tend to have problems with using
> the word "until"
> correctly)
>

No it's not done.

Just to make it right the next time, what would be the correct word instead
of "until" in this case?

> > to AddInitCode you would pass some code like:
> >
> > q{
> >
> > use HTML::TextToHTML ;
> >
> > {
> > local $/ = undef ;
> > my $text = <DATA> ;
> >
> > my $html = HTML::TextToHTML::<whatever you want to do> ($text) ;
> > print OUT $html ; }
> >
> > __DATA__
> >
> > }
>
> Ah, so this would make the rest-of-the-file the __DATA__ to
> be read and processed.

Yes

> Interesting! I'm not entirely sure
> whether this would work, since HTML::TextToHTML already makes
> use of the DATA handle to read in its own configuration -- I
> can't remember what happens with multiple __DATA__ sections
> in different files.
>

There should be no problem, since Perl can handle multiple __DATA__ in
different files

Gerald



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Re: Text to HTML recipe making [ In reply to ]
derrickspell at cdmplus
Dec 21, 2005, 7:33 AM
Post #5 of 12 (5360 views)
Permalink
On Dec 20, 2005, at 11:17 PM, Gerald Richter wrote:

>>>
>>> Unfortunately there are a few lines of C code missing to get this
>>> done. It was always my intention to make such a usage
>> possible, but I
>>> didn't got around until now to implement the last piece :-(
>>
>> Ah. Does this mean that you have now done it? (Sorry, I
>> notice that German-speakers tend to have problems with using
>> the word "until"
>> correctly)
>>
>
> No it's not done.
>
> Just to make it right the next time, what would be the correct word
> instead
> of "until" in this case?

"until now" implies that the status has now changed. If you say
"still" it means that the same status continues. For instance:
"I haven't gotten to it until now" vs "I still haven't gotten to
it" (Although the word "got" is not to be used in standard english -
it's purely conversational, and thus entirely appropriate for email
lists ;) )

Actually, I've always been impressed with your english, and from my
time digging around in the list archives I'd have to say it's
improved a lot over the last 6 years or so. How long have you
studied English? Did you start young?

-Derrick

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Re: Text to HTML recipe making [ In reply to ]
kat_lists at katspace
Mar 25, 2006, 3:54 PM
Post #6 of 12 (5253 views)
Permalink
On Tue, Dec 20, 2005 at 09:48:15PM +0100, Gerald Richter wrote:
> The other one is to create a syntax module, which uses HTML::TextToHTML for
> the actual work.
>
> To do so, just make a copy of Embperl/Syntax/Perl.pm, then in the call to
> AddInitCode you would pass some code like:

[snip]

Well, I have now actually gotten around to trying to implement it, and I
can't get it to work. I am completely stumped!

Attached is the module I made, Embperl::Syntax::TextToHTML
and I have a recipe which correctly sets the syntax to 'TextToHTML' when
trying to process a .txt file. However, hear is an example of the error
I get whenever I try to display a converted text file:

[13125]ERR: 24: Error in Perl code: Missing right curly or square
bracket at /home/kat/kat_web/katspace2/html/computers/linux_tips.txt
line 16, at end of line
syntax error at
/home/kat/kat_web/katspace2/html/computers/linux_tips.txt line 16, at
EOF

I've changed the code around trying to get it to work, and I get worse
errors, like it's trying to interpret the text file as perl code, and it
gives a flurry of perl syntax error messages.

Please can you help? This is a showstopper for me. Either that, or can
we have the plugin mechanism you were thinking of doing?

Kathryn Andersen
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v |
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Attached Files:

RE: Text to HTML recipe making [ In reply to ]
richter at ecos
Mar 27, 2006, 10:59 AM
Post #7 of 12 (5248 views)
Permalink
>
> Well, I have now actually gotten around to trying to
> implement it, and I can't get it to work. I am completely stumped!
>
> Attached is the module I made, Embperl::Syntax::TextToHTML
> and I have a recipe which correctly sets the syntax to
> 'TextToHTML' when trying to process a .txt file. However,
> hear is an example of the error I get whenever I try to
> display a converted text file:
>

Basicly it seems to be ok. The best is to set Embperl_Debug to dbgCompile =
0x8000000 (or set it to 0x7ffffff, which will output a lot of debug
informations). That would show you the Perl code Embperl generates and you
should be able to find the missing bracket.

Gerald




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Re: Text to HTML recipe making [ In reply to ]
kat_lists at katspace
Mar 27, 2006, 12:36 PM
Post #8 of 12 (5249 views)
Permalink
On Mon, Mar 27, 2006 at 08:59:31PM +0200, Gerald Richter wrote:
> >
> > Well, I have now actually gotten around to trying to
> > implement it, and I can't get it to work. I am completely stumped!
> >
> > Attached is the module I made, Embperl::Syntax::TextToHTML
> > and I have a recipe which correctly sets the syntax to
> > 'TextToHTML' when trying to process a .txt file. However,
> > hear is an example of the error I get whenever I try to
> > display a converted text file:
>
> Basicly it seems to be ok. The best is to set Embperl_Debug to dbgCompile =
> 0x8000000 (or set it to 0x7ffffff, which will output a lot of debug
> informations). That would show you the Perl code Embperl generates and you
> should be able to find the missing bracket.

(tears out hair)

I can't get the debug to work.

I give

Embperl_Debug 0x8000000

in my Apache configuration file, and I get zero debug information. Not
in my error logs, not in the page displayed.

Even if I go

Embperl_Debug 0xfffffff

I get absolutely NOTHING in the way of debug information, just the same
error message that I got before. (Yes, I'm not dumb, I did restart Apache).

This is with Embperl 2.1.0 and Apache 2.0.55

(sigh)

Kathryn Andersen
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RE: Text to HTML recipe making [ In reply to ]
richter at ecos
Mar 27, 2006, 7:20 PM
Post #9 of 12 (5240 views)
Permalink
>
> I can't get the debug to work.
>
> I give
>
> Embperl_Debug 0x8000000
>

Embperl tries to write it to /tmp/embperl.log, you can set the path with
Embperl_Log

Gerald



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Re: Text to HTML recipe making [ In reply to ]
kat_lists at katspace
Mar 27, 2006, 7:22 PM
Post #10 of 12 (5247 views)
Permalink
On Tue, Mar 28, 2006 at 06:36:13AM +1000, 'Kathryn Andersen' wrote:
> On Mon, Mar 27, 2006 at 08:59:31PM +0200, Gerald Richter wrote:
> > >
> > > Well, I have now actually gotten around to trying to
> > > implement it, and I can't get it to work. I am completely stumped!

[snip]

Never mind.
1) I found the log. I couldn't see anything wrong with the code there
either.
2) I have given up trying to get Embperl::Syntax::TextToHTML working, in
favour of a workaround. In my base.epl file, I check to see if the
desired file is a plain text file, and if so, read it in, convert it,
and then pass the string result to Execute as an input=> string.
It mostly works, though HTML::TextToHTML doesn't appear to be reading
its __DATA__ handle (which it needs for some of the conversions, which
do not work).

Maybe there's something about Embperl which doesn't like __DATA__
sections?

Kathryn Andersen
-=-=-=-=-=-=-=-=-
"Oh, that's marvelous. We're not sure where we are, but if they
were sure they wouldn't know where it was anyway."
-- Vila Restal (Blake's 7: The Web [A5])
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v |
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RE: Text to HTML recipe making [ In reply to ]
richter at ecos
Mar 27, 2006, 7:28 PM
Post #11 of 12 (5255 views)
Permalink
>
> Maybe there's something about Embperl which doesn't like
> __DATA__ sections?
>

I can't think of any reason why it shouldn't work. I will give it a try when
I habe some more spare time, but at the moment I am releaseing some critical
applications for our company, which must be done first, sorry!

Gerald



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Re: Text to HTML recipe making [ In reply to ]
kat_lists at katspace
Mar 27, 2006, 11:47 PM
Post #12 of 12 (5238 views)
Permalink
On Tue, Mar 28, 2006 at 05:28:46AM +0200, Gerald Richter wrote:
>
> >
> > Maybe there's something about Embperl which doesn't like
> > __DATA__ sections?
> >
>
> I can't think of any reason why it shouldn't work. I will give it a try when
> I habe some more spare time, but at the moment I am releaseing some critical
> applications for our company, which must be done first, sorry!

Don't worry about it, I found the mistake, it was my mistake: I had a
local $/ in the wrong scope, which messed everything up.

Not a good idea to program on not enough sleep...

Kathryn Andersen
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