Evitar que se grabe un pdf

Hola, me temo que no se puede...

Saludos

On 11 may 2004, you wrote in microsoft.public.es.webmasters:
Muchas gracias por tu contestación, aunque no se pueda.


Txiki

Hola, me temo que no se puede...

Saludos

Txiki

Al menos puedes incrustar la página PDF como un objeto en la página web,
creo que esto hará más difícil copiarla. ¿Por qué no pruebas?

Un saludo de Miguel Angel Da Vila

Embedding PDFs within HTML files

By Gordon Kent

One of the most underused methods of displaying PDFs on websites is to embed
the PDF file within

an HTML document. Macromedia Flash, QuickTime, MPEG and other rich media
file types are

frequently embedded within HTML pages. PDF files can also be embedded, and
here I'll cover how,

why and when it may be useful to embed PDF files in your HTML pages.

Please note that embedding PDFs within HTML pages has one specific
disadvantage for Netscape

Navigator users, the first page of the PDF file is the only one displayed.
I'll cover how to "get

around" this issue. If you develop web pages that afford for the sometimes
radical differences

between browser capabilities, it should be a simple issue of sniffing out
the user's browser and

presenting the correct code. For others, the fact the both browsers don't
support the same

capabilities may be reason enough not to embed PDF files within your HTML
pages.

Serving PDFs on the web is most often done by simply linking from a HTML
file to a PDF file (or

vice, versa). When a user clicks on a link, Acrobat Reader (or the full
version of Acrobat, if it is

installed) is spawned and the PDF is displayed within the browser's window.
This displays the

Acrobat toolbar just below the browser's toolbar. Users have the choice of
navigating either the

PDF file (assuming it is more than one page) or navigating the web site
using the web browser's

toolbar. With embedded PDF files, the process is technically the same,
however, the Acrobat

toolbar appears at the top (unless other preferences have been set) of the
region defined for the

embedded PDF.

Embedded PDF files function as other PDF files. Navigation, printing, the
filling in of form fields,

JavaScript, etc. all work as they normally would. Additionally, PDF files
that have file open

properties, such as a hidden toolbar, a particular page view or
magnification or full-screen mode

will function as expected. In full screen mode, the PDF file is displayed
full-screen within the region

defined for it, not full screen within the web browser window (see example
#2).

Why embed PDF files?

Embedding PDF files within HTML pages offer you the flexibility to display
other web-based

elements within the page such as banner advertisements, search forms, or
dynamically generated

information specific to a user or time which could include stock quotes,
news updates, personalized

navigation, etc. The majority of the dynamic information is represented as
HTML.

Sites that use dynamic page generation software (such as content management
systems,

personalization engines and even some application servers) have struggled
when publishing PDF

files as these systems often don't support PDF file natively. Furthermore,
the systems are designed

to generate HTML dynamically, and not PDF files. However, many of these
systems can work with

embedded images, media files and so can be used to efficiently display PDF
files.

What about frames?

In many cases where HTML (or other web-based media) must be displayed with a
PDF file, web

developers typically choose to use frames. Depending on the application,
frames may be a better

choice than embedding PDF files, especially if the whole site uses frames.

Here's an example of a simple PDF file embedded within a HTML page.

Example #1

Note: If you're viewing this with Netscape Navigator, you will not see the
standard Acrobat toolbars

nor will you be able to interact with the PDF file. Instead it appears like
an image does, which for

some applications could be useful. This example does include a link to the
PDF file. Click the PDF

file image to open the PDF file within the browser. When opened, you may
interact with the PDF file

as you usually would.

To embed PDF files within your HTML pages, use the <EMBED> tag. The SRC
property of the

<EMBED> tag is used to identify the name and location of the PDF file to be
displayed. Like

images, the SRC can be absolute or relative. The size of the rectangle, or
"window", in which the

PDF file is displayed is based on a number of pixels defined in the WIDTH
and HEIGHT properties of

the <EMBED> tag. The WIDTH and HEIGHT properties can either be a number of
pixels (I used

500 in these examples) or a percentage of the browser's real estate (e.g.
90%, 50% etc.) The popup

example in example #2 uses 100%.

Here's the source code of Example #1 above:

<EMBED src="example1.pdf" width="450" height="450"></EMBED>

For Netscape Navigator users, add the "href" so the PDF file opens when the
PDF

image is clicked-on.

<EMBED src="example1.pdf" width="450" height="450"

href="example1.pdf"></EMBED>

Note that it is safe to include the HREF tag for all browsers if you wish.
The HREF

link does not function with Internet Explorer, as IE allows complete
interaction

with the PDF file.

Example #2

Example #2 below shows the same PDF file in full screen mode. (Note that we
can

display more than one PDF file per HTML page, too).

To set how a PDF should open, within Acrobat (full version) select File >
Document

Properties > Open Options... To set the file to open in full screen mode
click "Open

in Full Screen Mode" in the Window Options section. From the Open Options
dialog

box you can also set which page to open first, the page's magnification and
page

layout as well as which toolbars to display, etc.

For another view of how PDFs can be used in full-screen mode, try out a
pop-up

window that uses JavaScript with the <EMBED> tag to display a PDF file that
has

been set to open in full-screen mode. In the pop-up window's HTML, I've set
the

LEFTMARGIN and TOPMARGIN properties of the BODY tag to "0" so that the PDF
is

flush against the pop-up window's edges. As the user stretches the window,
the

PDF scales with it. See the note within the PDF file for the complete HTML
code for

the pop-up window.

Example #3

Thus far we've discussed using the <EMBED> tag to display PDF files within
HTML

pages. For Internet Explorer users, developers can also use the <OBJECT>
tag.

The <OBJECT> tag offers a few other advantages, namely that if you're a

seasoned ActiveX developer you can use JavaScript or VBScript to send
messages

to Acrobat Reader to tell it to print the PDF file. Additionally, the
<OBJECT> tag is

configured to assist users in downloading the Acrobat Reader if they don't
have

Acrobat Reader installed.

The obvious question is how to build pages that might take advantage of what
the

<OBJECT> tag offers some users, but still enable users of other browsers or

earlier versions to view embedded PDF files. Fortunately, we can use the

<OBJECT> tag and nest an <EMBED> tag within it to satisfy requirements of
any

browser that at least supports the <EMBED> tag.

Here a variation on the code for example #1, but making use of the <OBJECT>

tag.



"Txiki" <Txikitxo()hotmail.com> escribió en el mensaje
news:

Hola:

Tengo una web y quiero colgar un documento pdf.

No quiero que la gente lo pueda guardar en su disco duro, ¿cómo lo puedo
hacer?

Tengo el acrobat 6 profesional.


Un saludo,

Txiki