HTML::HTMLDoc - Perl interface to the htmldoc program for producing PDF-Files from HTML-Content
use HTML::HTMLDoc; my $htmldoc = new HTML::HTMLDoc(); $htmldoc->set_html_content(qq~<html><body>A PDF file</body></html>~); # $htmldoc->set_input_file($filename); # alternative to use a present file from your fs my $pdf = $htmldoc->generate_pdf(); print $pdf->to_string(); $pdf->to_file('foo.pdf');
This Module provides an OO-interface to the htmldoc programm. To install this module you have to install the htmldoc program first. You can get it from http://www.htmldoc.org .
You can use it to produce PDF or PS files from a HTML-document. Currently many but not all parameters of HTMLDoc are supported.
You need to have HTMLDoc installed before installing this module.
All the pdf-Methods return true for success or false for failure. You can test if errors occurred by calling the error-method.
Normaly this module uses IPC::Open3 for communacation with the HTMLDOC process. However, in mod_perl-environments there appear problems with this module because the standard-output can not be captured. For this problem this module provides a fix doing the communication in file-mode.
For this you can specify the parameter mode in the constructor: my $htmldoc = new HTMLDoc('mode'=>'file', 'tmpdir'=>'/tmp');
creates a new Instance of HTML::HTMLDoc.
Optional parameters are: mode=>['file'|'ipc'] defaults to ipc tmpdir=>$dir defaults to /tmp
The tmpdir is used for temporary html-files in filemode. Remember to set the file-permissions to write for the executing process.
sets the desired size of the pages in the resulting PDF-document. $size is one of:
sets the owner-password for this document. $password can be any string. This only has effect if encryption is enabled. see enable_encryption().
sets the user-password for this document. $password can be any string. If set, User will be asked for this password when opening the file. This only has effect if encryption is enabled, see enable_encryption().
sets the permissions the user has to this document. $perm can be:
setting one of this flags automatically enables the document-encryption ($htmldoc->enable_encryption()) for you, because setting permissions will have no effect without it.
Setting 'all' and 'none' will delete all other previously set options. You can set multiple options if you need, eg.:
this one will do the same: $htmldoc->set_permissions('no-copy', 'no-modify');
turns link processing on.
turns the links off.
specify the search path for files in a document. Use this method if your images are not shown.
sets the format of the resulting pages to landscape
sets the format of the resulting pages to portrait
turns the title on.
turns the title off.
set the right margin. $margin is a INT, $messure one of 'in', 'cm' or 'mm'.
set the left margin. $margin is a INT, $messure one of 'in', 'cm' or 'mm'.
set the bottom margin. $margin is a INT, $messure one of 'in', 'cm' or 'mm'.
set the top margin. $margin is a INT, $messure one of 'in', 'cm' or 'mm'.
Sets the background of all pages to this background color. $color is a hex-coded color-value (eg. #FFFFFF), a rgb-value (eg set_bodycolor(0,0,0) for black) or a color name (eg. black)
Sets the default font of the content. Currently the following fonts are supported:
Arial Courier Helvetica Monospace Sans-Serif Serif Symbol Times
Sets the default font size for the body text.
Sets the background image for the document. $image is the path to the image in your filesystem.
Sets the logo-image for the document. $image is the path to the image in your filesystem. The supported formats are BMP, GIF, JPEG, and PNG. Remember to specify the 'l'-option somewhere in header or footer using set_header() or/and set_footer().
$htmldoc->set_logoimage('mylogo.gif'); $htmldoc->set_header('.', 'l', '.');
reads out a previous set logo-image. You will get the filename to the image.
specifies the browser width in pixels. The browser width is used to scale images and pixel measurements when generating PostScript and PDF files. It does not affect the font size of text.
The default browser width is 680 pixels which corresponds roughly to a 96 DPI display. Please note that your images and table sizes are equal to or smaller than the browser width, or your output will overlap or truncate in places.
specifies that Flate compression should be performed on the output file. The optional level parameter is a number from 1 (fastest and least amount of compression) to 9 (slowest and most amount of compression).
This option is only available when generating Level 3 PostScript or PDF files.
$quality is a value between 1 and 100. Defaults to 75.
Sets the quality of the images in the PDF. Low values result in poor image quality but also in low file sizes for the PDF. High values result in good image quality but also in high file sizes. You can also use methods best_image_quality() or low_image_quality(). For normal usage, including photos or similar a value of 75 should be ok. For high quality results use 100. If you want to reduce file size you have to play with the value to find a compromise between quality and size that fits your needs.
Set the jpg-image quality to the maximum value. Call this method if you want to produce high quality PDF-Files. Note that this could produce huge file sizes depending on how many images you include and how big they are. See set_jpeg_compression(100).
Set the jpg-image quality to a low value (25%). Call this method if you have many or huge images like photos in your PDF and you do not want exploding file sizes for your resulting document. Note that calling this method could result in poor image quality. If you want some more control see method set_jpeg_compression() which allows you to set the value of the compression to other values than 25%.
specifies the initial viewing mode of the document. $mode is one of:
defines the charset for the output document. The following charsets are currenty supported: cp-874 cp-1250 cp-1251 cp-1252 cp-1253 cp-1254 cp-1255 cp-1256 cp-1257 cp-1258 iso-8859-1 iso-8859-2 iso-8859-3 iso-8859-4 iso-8859-5 iso-8859-6 iso-8859-7 iso-8859-8 iso-8859-9 iso-8859-14 iso-8859-15 koi8-r
defines that color output is desired
defines that b&w output is desired
enables encryption and security features for the document.
enables encryption and security features for the document.
sets the format of the output-document. $format can be one of:
this is the function to set the html-content as a scalar. See set_input_file($filename) to use a present file from your filesystem for input
returns the previous set html-content.
this is the function to set the input file name. It will also switch the operational mode to 'file'.
returns the previous set input file name.
defines the data that should be displayed in header. One can choose from the following chars for each left, center and right:
Setting the header to contain the title left, nothing in center and actual pagenumber right do the follwing
$htmldoc->set_header('t', '.', '1');
defines the data that should be displayed in footer. See set_header() for details setting the left, center and right value.
specifies that fonts should be embedded in PostScript and PDF output. This is especially useful when generating documents in character sets other than ISO-8859-1.
turn the font-embedding previously enabled by embed_fonts() off.
generates the output-document. Returns a instance of HTML::HTMLDoc::PDF. See the perldoc of this class for details
in scalar content returns the last error that occurred, in list context returns all errors that occurred.
None by default.
Michael Frankl - mfrankl at seibert-media.de
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself
Thanks very much to:
Keith W. Sheffield
for suggestions and bug fixes.
A: The images that you want to include have to be found by the process that is generating your PDF (that is using this Module). If you call the images relatively in your html-code like: <img src="test.gif"> or <img src="./myimages/test.gif"> make sure that your perl program can find them. Note that a perl program can change the working directory internal (See perl -f chdir). You can find out the working directory using:
use Cwd; print Cwd::abs_path(Cwd::cwd);
The module provides a method path($p). Use this if you want to specify where the images you want to use can be found. Example:
A: You can include a HTML-Comment that will do a page break for you at the point it is located: <!-- PAGE BREAK -->
A: Use htmldoc in file-Mode:
my $htmldoc = new HTMLDoc('mode'=>'file', 'tmpdir'=>'/tmp');
Please use the following URL to report any bugs or missing functions.