Hi,
does fpc (or lazarus) have a helper class for indexing the content of PDF files?
I want to create a searchable full text index.
TIA,
Marc
Marc Santhoff
Mailing lists / fpc-pascal / 2015-06
PDF indexing
9 messages · 3 people · –
- Marc Santhoff 5
- Michael Van Canneyt 3
- Serguei TARASSOV 1
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Marc Santhoff wroteHi, does fpc (or lazarus) have a helper class for indexing the content of PDF files?
check packages/fpindexer
I have used it to create full text searches on a database. You should be able to adapt the base code to create an index of a PDF.
Michael.
Michael Van Canneyt wrote 12 lines
On Sat, 20 Jun 2015, Marc Santhoff wrote:
> Hi,
>
> does fpc (or lazarus) have a helper class for indexing the content of
> PDF files?
check packages/fpindexer
I have used it to create full text searches on a database.
You should be able to adapt the base code to create an index of a PDF.
That looks pretty intresting. And it has some docs, wow.
If I understand correctly I'd only have to implement a class TIReaderPDF and the difference to simple text reading is the part that extracts a text stream or the text parts of the stream rejecting the pdf commands (if they are in there, need to look at PowerPDF).
Marc
Marc Santhoff
Marc Santhoff wrote 20 lines
On So, 2015-06-21 at 00:33 +0200, Michael Van Canneyt wrote:
>
> On Sat, 20 Jun 2015, Marc Santhoff wrote:
>
>> Hi,
>>
>> does fpc (or lazarus) have a helper class for indexing the content of
>> PDF files?
>
> check packages/fpindexer
>
> I have used it to create full text searches on a database.
> You should be able to adapt the base code to create an index of a PDF.
That looks pretty intresting. And it has some docs, wow.
If I understand correctly I'd only have to implement a class TIReaderPDF
and the difference to simple text reading is the part that extracts a
text stream or the text parts of the stream rejecting the pdf commands
(if they are in there, need to look at PowerPDF).
Yes, that would be correct.
Michael.
Michael Van Canneyt wrote 25 lines
On Tue, 23 Jun 2015, Marc Santhoff wrote:
> On So, 2015-06-21 at 00:33 +0200, Michael Van Canneyt wrote:
>>
>> On Sat, 20 Jun 2015, Marc Santhoff wrote:
>>
>>> Hi,
>>>
>>> does fpc (or lazarus) have a helper class for indexing the content of
>>> PDF files?
>>
>> check packages/fpindexer
>>
>> I have used it to create full text searches on a database.
>> You should be able to adapt the base code to create an index of a PDF.
>
> That looks pretty intresting. And it has some docs, wow.
>
> If I understand correctly I'd only have to implement a class TIReaderPDF
> and the difference to simple text reading is the part that extracts a
> text stream or the text parts of the stream rejecting the pdf commands
> (if they are in there, need to look at PowerPDF).
Yes, that would be correct.
Many thanks, Michael.
Currently I'm searching a pdf access library that could help doing so. The only one halfway fitting up to now is this one:
http://itextpdf.com/functionality
Open Source but a license similar to LGPL without exception. Still searching ...
Marc
Marc Santhoff
Marc Santhoff wrote 36 lines
On Di, 2015-06-23 at 09:10 +0200, Michael Van Canneyt wrote:
>
> On Tue, 23 Jun 2015, Marc Santhoff wrote:
>
>> On So, 2015-06-21 at 00:33 +0200, Michael Van Canneyt wrote:
>>>
>>> On Sat, 20 Jun 2015, Marc Santhoff wrote:
>>>
>>>> Hi,
>>>>
>>>> does fpc (or lazarus) have a helper class for indexing the content of
>>>> PDF files?
>>>
>>> check packages/fpindexer
>>>
>>> I have used it to create full text searches on a database.
>>> You should be able to adapt the base code to create an index of a PDF.
>>
>> That looks pretty intresting. And it has some docs, wow.
>>
>> If I understand correctly I'd only have to implement a class TIReaderPDF
>> and the difference to simple text reading is the part that extracts a
>> text stream or the text parts of the stream rejecting the pdf commands
>> (if they are in there, need to look at PowerPDF).
>
> Yes, that would be correct.
Many thanks, Michael.
Currently I'm searching a pdf access library that could help doing so.
The only one halfway fitting up to now is this one:
http://itextpdf.com/functionality
Open Source but a license similar to LGPL without exception. Still
searching ...
But Java or .Net.
Depending on your platform you may attempt gnostice products. It's Delphi code, but they are quite open and I was told the upcoming rework of their products will make support for Lazarus possible.
Michael.
Michael Van Canneyt wrote 41 lines
On Wed, 24 Jun 2015, Marc Santhoff wrote:
> On Di, 2015-06-23 at 09:10 +0200, Michael Van Canneyt wrote:
>>
>> On Tue, 23 Jun 2015, Marc Santhoff wrote:
>>
>>> On So, 2015-06-21 at 00:33 +0200, Michael Van Canneyt wrote:
>>>>
>>>> On Sat, 20 Jun 2015, Marc Santhoff wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> does fpc (or lazarus) have a helper class for indexing the content of
>>>>> PDF files?
>>>>
>>>> check packages/fpindexer
>>>>
>>>> I have used it to create full text searches on a database.
>>>> You should be able to adapt the base code to create an index of a PDF.
>>>
>>> That looks pretty intresting. And it has some docs, wow.
>>>
>>> If I understand correctly I'd only have to implement a class TIReaderPDF
>>> and the difference to simple text reading is the part that extracts a
>>> text stream or the text parts of the stream rejecting the pdf commands
>>> (if they are in there, need to look at PowerPDF).
>>
>> Yes, that would be correct.
>
> Many thanks, Michael.
>
> Currently I'm searching a pdf access library that could help doing so.
> The only one halfway fitting up to now is this one:
>
> http://itextpdf.com/functionality
>
> Open Source but a license similar to LGPL without exception. Still
> searching ...
But Java or .Net.
Really? Oops, oversight. I thought there would be a C version.
Depending on your platform you may attempt gnostice products. It's Delphi code, but they are quite open and I was told the upcoming rework of their products will make support for Lazarus possible.
I'll have a look at that one. Pure Object Pascal would be very nice.
And I found poppler, which is a fork of xpdf compiling into a library. Part of Gnome, so LGPL.
Another solution would be to use TProcess and an external tool, there are some "pdf2txt".variants out there.
Thanks again,
Marc
Marc Santhoff
Show quoted text 33 lines
Date: Wed, 24 Jun 2015 08:47:20 +0200
From: Marc Santhoff
Subject: Re: [fpc-pascal] PDF indexing
Message-ID:
Content-Type: text/plain; charset="ISO-8859-15"
> >Currently I'm searching a pdf access library that could help doing so.
> >The only one halfway fitting up to now is this one:
> >
> >http://itextpdf.com/functionality
> >
> >Open Source but a license similar to LGPL without exception. Still
> >searching ...
> >
> >But Java or .Net.
Really? Oops, oversight. I thought there would be a C version.
> >Depending on your platform you may attempt gnostice products. It's Delphi code,
> >but they are quite open and I was told the upcoming rework of their products
> >will make support for Lazarus possible.
I'll have a look at that one. Pure Object Pascal would be very nice.
And I found poppler, which is a fork of xpdf compiling into a library.
Part of Gnome, so LGPL.
Another solution would be to use TProcess and an external tool, there
are some "pdf2txt".variants out there.
Thanks again,
Marc
-- Marc Santhoff
Marc,
Take a look on Xpdf project
"The Xpdf project also includes a PDF text extractor" http://www.foolabs.com/xpdf/about.html
A+
Serguei
Serguei TARASSOV wrote 10 lines
On 24/06/2015 12:00, wrote:
> Date: Wed, 24 Jun 2015 08:47:20 +0200
> From: Marc Santhoff
>
> Subject: Re: [fpc-pascal] PDF indexing
> Message-ID:
> Content-Type: text/plain; charset="ISO-8859-15"
>
> > >Currently I'm searching a pdf access library that could help doing so.
> > >The only one halfway fitting up to now is this one:
...
Show quoted text 5 lines
Marc,
Take a look on Xpdf project
"The Xpdf project also includes a PDF text extractor"
http://www.foolabs.com/xpdf/about.html
I know, I've found:
http://poppler.freedesktop.org/
which is a fork of it.
Thank you nonetheless,
Marc
Marc Santhoff