docx2txt.pl 20.3 KB
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#!/usr/bin/env perl

# docx2txt, a command-line utility to convert Docx documents to text format.
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# Copyright (C) 2008-2014 Sandeep Kumar
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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

#
# This script extracts text from document.xml contained inside .docx file.
# Perl v5.10.1 was used for testing this script.
#
# Author : Sandeep Kumar (shimple0 -AT- Yahoo .DOT. COM)
#
# ChangeLog :
#
#    10/08/2008 - Initial version (v0.1)
#    15/08/2008 - Script takes two arguments [second optional] now and can be
#                 used independently to extract text from docx file. It accepts
#                 docx file directly, instead of xml file.
#    18/08/2008 - Added support for center and right justification of text that
#                 fits in a line 80 characters wide (adjustable).
#    03/09/2008 - Fixed the slip in usage message.
#    12/09/2008 - Slightly changed the script invocation and argument handling
#                 to incorporate some of the shell script functionality here.
#                 Added support to handle embedded urls in docx document.
#    23/09/2008 - Changed #! line to use /usr/bin/env - good suggestion from
#                 Rene Maroufi (info>AT<maroufi>DOT<net) to reduce user work
#                 during installation.
#    31/08/2009 - Added support for handling more escape characters.
#                 Using OS specific null device to redirect stderr.
#                 Saving text file in binary mode.
#    03/09/2009 - Updations based on feedback/suggestions from Sergei Kulakov
#                 (sergei>AT<dewia>DOT<com).
#                 - removal of non-document text in between TOC related tags.
#                 - display of hyperlink alongside linked text user controlled.
#                 - some character conversion updates
#    05/09/2009 - Merged cjustify and rjustify into single subroutine justify.
#                 Added more character conversions.
#                 Organised conversion mappings in tabular form for speedup and
#                 easy maintenance.
#                 Tweaked code to reduce number of passes over document content.
#    10/09/2009 - For leaner text experience, hyperlink is not displayed if
#                 hyperlink and hyperlinked text are same, even if user has
#                 enabled hyperlink display.
#                 Improved handling of short line justification. Many
#                 justification tag patterns were not captured earlier.
#    11/09/2009 - A directory holding the unzipped content of .docx file can
#                 also be specified as argument to the script, in place of file.
#    17/09/2009 - Removed trailing slashes from input directory name.
#                 Updated unzip command invocations to handle path names
#                 containing spaces.
#    01/10/2009 - Added support for configuration file.
#    02/10/2009 - Using single quotes to specify path for unzip command. 
#    04/10/2009 - Corrected configuration option name lineIndent to listIndent.
#    11/12/2011 - Configuration variables now begin with config_ .
#                 Configuration file is looked for in HOME directory as well.
#                 Added a check for existence of unzip command.
#                 Superscripted cross-references are placed within [...] now.
#                 Fixed bugs #3003903, #3082018 and #3082035.
#                 Fixed nullDevice for Cygwin.
#    12/12/2011 - Configuration file is also looked for in /etc, default
#                 location for Unix-ish systems.
#    22/12/2011 - Added &apos; and &quot; to docx specific escape characters
#                 conversions. [Bug #3463033]
#    24/12/2011 - Improved handling of special (non-text) characters, along with
#                 support for more non-text characters.
#    05/01/2012 - Configuration file is now looked for in current directory,
#                 user configuration directory and system configuration
#                 directory (in the specified order). This streamlining allows
#                 for per user configuration file even on Windows.
#    14/01/2012 - Wrong code was committed during earlier fixing of nullDevice
#                 for Cygwin, fixed that.
#                 Usage is extended to accept docx file from standard input.
#                 "-h" has to be given as the first argument to get usage help.
#                 Added new configuration variable "config_tempDir".
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#    14/03/2014 - Remove deleted text from output. This effects in case changes
#                 are being tracked in docx document. Patch was contributed by
#                 William Parsons (wbparsons>AT<cshore>DOT<com).
#                 Removed experimental config option config_exp_extra_deEscape.
#    27/03/2014 - Remove non-document_text content marked by wp/wp14 tags.
#    07/04/2014 - Added support for handling lists (bullet, decimal, letter,
#                 roman) along with (attempt at) indentation.
#                 Added new configuration variable config_twipsPerChar.
#                 Removed configuration variable config_listIndent.
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#


#
# The default settings below can be overridden via docx2txt.config in current
# directory/ user configuration directory/ system configuration directory.
#

our $config_unzip = '/usr/bin/unzip';	# Windows path like 'C:/path/to/unzip.exe'

our $config_newLine = "\n";		# Alternative is "\r\n".
our $config_lineWidth = 80;		# Line width, used for short line justification.
our $config_showHyperLink = "N";	# Show hyperlink alongside linked text.
our $config_tempDir;			# Directory for temporary file creation.
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our $config_twipsPerChar = 120;		# Approx mapping for layout purpose.
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#
# Windows/Non-Windows specific settings. Adjust these here, if needed.
#

if ($ENV{OS} =~ /^Windows/ && !(exists $ENV{OSTYPE} || exists $ENV{HOME})) {
    $nullDevice = "nul";
    $userConfigDir = $ENV{APPDATA};

    #
    # On Windows, configuration file is installed in same folder as this script.
    #
    $0 =~ m%^(.*[/\\])[^/\\]*?$%;
    $systemConfigDir = $1;

    $config_tempDir = "$ENV{TEMP}";
} else {
    $nullDevice = "/dev/null";
    $userConfigDir = $ENV{HOME};
    $systemConfigDir = "/etc";

    $config_tempDir = "/tmp";
}


#
# Character conversion tables
#

# Only (amp, apos, gt, lt and quot) are the required reserved characters in HTML
# and XHTML, others are used for better text experience.
my %escChrs = (	amp => '&', apos => '\'', gt => '>', lt => '<', quot => '"',
		acute => '\'', brvbar => '|', copy => '(C)', divide => '/',
		laquo => '<<', macr => '-', nbsp => ' ', raquo => '>>',
		reg => '(R)', shy => '-', times => 'x'
);

my %splchars = (
    "\xC2" => {
	"\xA0" => ' ',		# <nbsp> non-breaking space
	"\xA2" => 'cent',	# <cent>
	"\xA3" => 'Pound',	# <pound>
	"\xA5" => 'Yen',	# <yen>
	"\xA6" => '|',		# <brvbar> broken vertical bar
#	"\xA7" => '',		# <sect> section
	"\xA9" => '(C)',	# <copy> copyright
	"\xAB" => '<<',		# <laquo> angle quotation mark (left)
	"\xAC" => '-',		# <not> negation
	"\xAE" => '(R)',	# <reg> registered trademark
	"\xB1" => '+-',		# <plusmn> plus-or-minus
	"\xB4" => '\'',		# <acute>
	"\xB5" => 'u',		# <micro>
#	"\xB6" => '',		# <para> paragraph
	"\xBB" => '>>',		# <raquo> angle quotation mark (right)
	"\xBC" => '(1/4)',	# <frac14> fraction 1/4
	"\xBD" => '(1/2)',	# <frac12> fraction 1/2
	"\xBE" => '(3/4)',	# <frac34> fraction 3/4
    },

    "\xC3" => {
	"\x97" => 'x',		# <times> multiplication
	"\xB7" => '/',		# <divide> division
    },

    "\xCF" => {
	"\x80" => 'PI',		# <pi>
    },

    "\xE2\x80" => {
	"\x82" => '  ',		# <ensp> en space
	"\x83" => '  ',		# <emsp> em space
	"\x85" => ' ',		# <qemsp>
	"\x93" => ' - ',	# <ndash> en dash
	"\x94" => ' -- ',	# <mdash> em dash
	"\x95" => '--',		# <horizontal bar>
	"\x98" => '`',		# <soq>
	"\x99" => '\'',		# <scq>
	"\x9C" => '"',		# <doq>
	"\x9D" => '"',		# <dcq>
	"\xA2" => '::',		# <diamond symbol>
	"\xA6" => '...',	# <hellip> horizontal ellipsis
	"\xB0" => '%.',		# <permil> per mille
    },

    "\xE2\x82" => {
	"\xAC" => 'Euro'	# <euro>
    },

    "\xE2\x84" => {
	"\x85" => 'c/o',	# <care/of>
	"\x97" => '(P)',	# <sound recording copyright>
	"\xA0" => '(SM)',	# <servicemark>
	"\xA2" => '(TM)',	# <trade> trademark
	"\xA6" => 'Ohm',	# <Ohm>
    },

    "\xE2\x85" => {
	"\x93" => '(1/3)',
	"\x94" => '(2/3)',
	"\x95" => '(1/5)',
	"\x96" => '(2/5)',
	"\x97" => '(3/5)',
	"\x98" => '(4/5)',
	"\x99" => '(1/6)',
	"\x9B" => '(1/8)',
	"\x9C" => '(3/8)',
	"\x9D" => '(5/8)',
	"\x9E" => '(7/8)',
	"\x9F" => '1/',
    },

    "\xE2\x86" => {
	"\x90" => '<--',	# <larr> left arrow
	"\x92" => '-->',	# <rarr> right arrow
	"\x94" => '<-->',	# <harr> left right arrow
    },

    "\xE2\x88" => {
	"\x82" => 'd',		# partial differential
	"\x9E" => 'infinity',
    },

    "\xE2\x89" => {
	"\xA0" => '!=',		# <neq>
	"\xA4" => '<=',		# <leq>
	"\xA5" => '>=',		# <geq>
    }
);


#
# Check argument(s) sanity.
#

my $usage = <<USAGE;

Usage:	$0 [infile.docx|-|-h] [outfile.txt|-]
	$0 < infile.docx
	$0 < infile.docx > outfile.txt

	In second usage, output is dumped on STDOUT.

	Use '-h' as the first argument to get this usage information.

	Use '-' as the infile name to read the docx file from STDIN.

	Use '-' as the outfile name to dump the text on STDOUT.
	Output is saved in infile.txt if second argument is omitted.

Note:	infile.docx can also be a directory name holding the unzipped content
	of concerned .docx file.

USAGE

die $usage if (@ARGV > 2 || $ARGV[0] eq '-h');


#
# Look for configuration file in current directory/ user configuration
# directory/ system configuration directory - in the given order.
#

my %config;

if (-f "docx2txt.config") {
    %config = do 'docx2txt.config';
} elsif (-f "$userConfigDir/docx2txt.config") {
    %config = do "$userConfigDir/docx2txt.config";
} elsif (-f "$systemConfigDir/docx2txt.config") {
    %config = do "$systemConfigDir/docx2txt.config";
}

if (%config) {
    foreach my $var (keys %config) {
        $$var = $config{$var};
    }
}

#
# Check for unzip utility, before proceeding further.
#

die "Failed to locate unzip command '$config_unzip'!\n" if ! -f $config_unzip;


#
# Handle cases where this script reads docx file from STDIN.
#

if (@ARGV == 0) {
    $ARGV[0] = '-';
    $ARGV[1] = '-';
    $inputFileName = "STDIN";
} elsif (@ARGV == 1 && $ARGV[0] eq '-') {
    $ARGV[1] = '-';
    $inputFileName = "STDIN";
} else {
    $inputFileName = $ARGV[0];
}

if ($ARGV[0] eq '-') {
    $tempFile = "${config_tempDir}/dx2tTemp_${$}_" . time() . ".docx";
    open my $fhTemp, "> $tempFile" or die "Can't create temporary file for storing docx file read from STDIN!\n";

    binmode $fhTemp;
    local $/ = undef;
    my $docxFileContent = <STDIN>;

    print $fhTemp $docxFileContent;
    close $fhTemp;

    $ARGV[0] = $tempFile;
}


#
# Check for existence and readability of required file in specified directory,
# and whether it is a text file.
#

sub check_for_required_file_in_folder {
    stat("$_[1]/$_[0]");
    die "Can't read <$_[0]> in <$_[1]>!\n" if ! (-f _ && -r _);
    die "<$_[1]/$_[0]> does not seem to be a text file!\n" if ! -T _;
}

sub readFileInto {
    local $/ = undef;
    open my $fh, "$_[0]" or die "Couldn't read file <$_[0]>!\n";
    binmode $fh;
    $_[1] = <$fh>;
    close $fh;
}

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sub readOptionalFileInto {
    local $/ = undef;

    stat("$_[0]");
    if (-f _) {
        if (-r _ && -T _) {
            open my $fh, "$_[0]" or die "Couldn't read file <$_[0]>!\n";
            binmode $fh;
            $_[1] = <$fh>;
            close $fh;
        }
        else {
            die "Invalid <$_[0]>!\n";
        }
    }
}


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#
# Check whether first argument is specifying a directory holding extracted
# content of .docx file, or .docx file itself.
#

sub cleandie {
    unlink("$tempFile") if -e "$tempFile";
    die "$_[0]";
}
    

stat($ARGV[0]);

if (-d _) {
    check_for_required_file_in_folder("word/document.xml", $ARGV[0]);
    check_for_required_file_in_folder("word/_rels/document.xml.rels", $ARGV[0]);
    $inpIsDir = 'y';
}
else {
    cleandie "Can't read docx file <$inputFileName>!\n" if ! (-f _ && -r _);
    cleandie "<$inputFileName> does not seem to be a docx file!\n" if -T _;
}


#
# Extract xml document content from argument docx file/directory.
#

if ($inpIsDir eq 'y') {
    readFileInto("$ARGV[0]/word/document.xml", $content);
} else {
    $content = `"$config_unzip" -p "$ARGV[0]" word/document.xml 2>$nullDevice`;
}

cleandie "Failed to extract required information from <$inputFileName>!\n" if ! $content;


#
# Be ready for outputting the extracted text contents.
#

if (@ARGV == 1) {
     $ARGV[1] = $ARGV[0];

     # Remove any trailing slashes to generate proper output filename, when
     # input is directory.
     $ARGV[1] =~ s%[/\\]+$%% if ($inpIsDir eq 'y');

     $ARGV[1] .= ".txt" if !($ARGV[1] =~ s/\.docx$/\.txt/);
}

my $txtfile;
open($txtfile, "> $ARGV[1]") || cleandie "Can't create <$ARGV[1]> for output!\n";
binmode $txtfile;    # Ensure no auto-conversion of '\n' to '\r\n' on Windows.


#
# Gather information about header, footer, hyperlinks, images, footnotes etc.
#

if ($inpIsDir eq 'y') {
    readFileInto("$ARGV[0]/word/_rels/document.xml.rels", $_);
} else {
    $_ = `"$config_unzip" -p "$ARGV[0]" word/_rels/document.xml.rels 2>$nullDevice`;
}

my %docurels;
while (/<Relationship Id="(.*?)" Type=".*?\/([^\/]*?)" Target="(.*?)"( .*?)?\/>/g)
{
    $docurels{"$2:$1"} = $3;
}

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#
# Gather list numbering information.
#

$_ = "";
if ($inpIsDir eq 'y') {
    readOptionalFileInto("$ARGV[0]/word/numbering.xml", $_);
} else {
    $_ = `"$config_unzip" -p "$ARGV[0]" word/numbering.xml 2>$nullDevice`;
}

my %abstractNum;
my @N2ANId = ();

my %NFList = (
    "bullet"      => \&bullet,
    "decimal"     => \&decimal,
    "lowerLetter" => \&lowerLetter,
    "upperLetter" => \&upperLetter,
    "lowerRoman"  => \&lowerRoman,
    "upperRoman"  => \&upperRoman
);

if ($_) {
    while (/<w:abstractNum w:abstractNumId="(\d+)">(.*?)<\/w:abstractNum>/g)
    {
        my $abstractNumId = $1, $temp = $2;

        while ($temp =~ /<w:lvl w:ilvl="(\d+)"[^>]*>.*?<w:numFmt w:val="(.*?)"[^>]*>.*?<w:lvlText w:val="(.*?)"[^>]*>.*?<w:ind w:left="(\d+)" [^>]*>/g )
        {
            # $2: NumFmt, $3: LvlText, $4: Indent (twips)

            @{$abstractNum{"$abstractNumId:$1"}} = (
                $NFList{$2},
                $3,
                int (($4 / $config_twipsPerChar) + 0.5),
                $4
            );
        }
    }

    while ( /<w:num w:numId="(\d+)"><w:abstractNumId w:val="(\d+)"/g )
    {
        $N2ANId[$1] = $2;
    }
}

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# Remove the temporary file (if) created to store input from STDIN. All the
# (needed) data is read from it already.
unlink("$tempFile") if -e "$tempFile";


#
# Subroutines for center and right justification of text in a line.
#

sub justify {
    my $len = length $_[1];

    if ($_[0] eq "center" && $len < ($config_lineWidth - 1)) {
        return ' ' x (($config_lineWidth - $len) / 2) . $_[1];
    } elsif ($_[0] eq "right" && $len < $config_lineWidth) {
        return ' ' x ($config_lineWidth - $len) . $_[1];
    } else {
        return $_[1];
    }
}

#
# Subroutines for dealing with embedded links and images
#

sub hyperlink {
    my $hlrid = $_[0];
    my $hltext = $_[1];
    my $hlink = $docurels{"hyperlink:$hlrid"};

    $hltext =~ s/<[^>]*?>//og;
    $hltext .= " [HYPERLINK: $hlink]" if (lc $config_showHyperLink eq "y" && $hltext ne $hlink);

    return $hltext;
}

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#
# Subroutines for processing numbering information.
#

my @RomanNumbers = ( "",
    "i", "ii", "iii", "iv", "v", "vi", "vii", "viii", "ix", "x", "xi", "xii",
    "xiii", "xiv", "xv", "xvi", "xvii", "xviii", "xix", "xx", "xxi", "xxii",
    "xxiii", "xxiv", "xxv", "xxvi", "xxvii", "xxviii", "xxix", "xxx", "xxxi",
    "xxxii", "xxxiii", "xxxiv", "xxxv", "xxxvi", "xxxvii", "xxxviii", "xxxix",
    "xl", "xli", "xlii", "xliii", "xliv", "xlv", "xlvi", "xlvii", "xlviii",
    "xlix", "l", "li" );


sub lowerRoman {
    return $RomanNumbers[$_[0]] if ($_[0] < @RomanNumbers);

    @rcode = ("i", "iv", "v", "ix", "x", "xl", "l", "xc", "c", "cd", "d", "cm", "m");
    @dval = (1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000);

    my $roman = "";
    my $num = $_[0];

    my $div, $i = (@rcode - 1);
    while ($num > 0) {
        $i-- while ($num < $dval[$i]);
        $div = $num / $dval[$i];
        $num = $num % $dval[$i];
        $roman .= $rcode[$i] x $div;
    }

    return $roman;
}

sub upperRoman {
    return uc lowerRoman(@_);
}


sub lowerLetter {
    @Alphabets = split '' , "abcdefghijklmnopqrstuvwxyz";
    return $Alphabets[($_[0] % 26) - 1] x (($_[0] - 1)/26 + 1);
}

sub upperLetter {
    return uc lowerLetter(@_);
}


sub decimal {
    return $_[0];
}


my %bullets = (
    "\x6F" => 'o',
    "\xEF\x81\xB6" => '::',	# Diamond
    "\xEF\x82\xA7" => '#',	# Small Black Square
    "\xEF\x82\xB7" => '*',	# Small Black Circle
    "\xEF\x83\x98" => '>',	# Arrowhead
    "\xEF\x83\xBC" => '+'	# Right Sign
);

sub bullet {
    return $bullets{$_[0]} ? $bullets{$_[0]} : 'oo';
}
    
my @lastCnt = (0);
my @twipStack = (0);
my @keyStack = (undef);
my $ssiz = 1;

sub listNumbering {
    my $aref = \@{$abstractNum{"$N2ANId[$_[0]]:$_[1]"}};
    my $key = "$N2ANId[$_[0]]:$_[1]";
    my $ccnt;

    if ($aref->[3] < $twipStack[$ssiz-1]) {
        while ($twipStack[$ssiz-1] > $aref->[3]) {
            pop @twipStack;
            pop @keyStack;
            pop @lastCnt;
            $ssiz--;
        }
    }

    if ($aref->[3] == $twipStack[$ssiz-1]) {
        if ($key eq $keyStack[$ssiz-1]) {
            ++$lastCnt[$ssiz-1];
        }
        else {
            $keyStack[$ssiz-1] = $key;
            $lastCnt[$ssiz-1] = 1;
        }
    }
    elsif ($aref->[3] > $twipStack[$ssiz-1]) {
        push @twipStack, $aref->[3];
        push @keyStack, $key;
        push @lastCnt, 1;
        $ssiz++;
    }

    $ccnt = $lastCnt[$ssiz-1];
    my $lvlText;

    if ($aref->[0] != \&bullet) {
        $lvlText = $aref->[1];
        $lvlText =~ s/%\d([^%]*)$/($aref->[0]->($ccnt)).$1/oe;

        my $i = $ssiz - 2;
        $i-- while ($lvlText =~ s/%\d([^%]*)$/$lastCnt[$i]$1/o);
    }
    else {
        $lvlText = $aref->[0]->($aref->[1]);
    }

    return ' ' x $aref->[2] . $lvlText . ' ';
}

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#
# Subroutines for processing paragraph content.
#

sub processParagraph {
    my $para = $_[0] . "$config_newLine";
    my $align = $1 if ($_[0] =~ /<w:jc w:val="([^"]*?)"\/>/);

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    $para =~ s|<w:numPr><w:ilvl w:val="(\d+)"/><w:numId w:val="(\d+)"\/>|listNumbering($2,$1)|oge;

649 650 651 652 653 654 655 656 657 658 659 660 661 662
    $para =~ s/<.*?>//og;
    return justify($align,$para) if $align;

    return $para;
}

#
# Text extraction starts.
#

my %tag2chr = (tab => "\t", noBreakHyphen => "-", softHyphen => " - ");

$content =~ s/<?xml .*?\?>(\r)?\n//;

663 664
$content =~ s{<(wp14|wp):[^>]*>.*?</\1:[^>]*>}||og;

665 666 667 668
# Remove the field instructions (instrText) and data (fldData).
$content =~ s|<w:instrText[^>]*>.*?</w:instrText>||og;
$content =~ s|<w:fldData[^>]*>[^<]*?</w:fldData>||og;

669 670 671
# Remove deleted text.
$content =~ s|<w:delText[^>]*>.*?</w:delText>||og;

672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
# Mark cross-reference superscripting within [...].
$content =~ s|<w:vertAlign w:val="superscript"/></w:rPr><w:t>(.*?)</w:t>|[$1]|og;

$content =~ s{<w:(tab|noBreakHyphen|softHyphen)/>}|$tag2chr{$1}|og;

my $hr = '-' x $config_lineWidth . $config_newLine;
$content =~ s|<w:pBdr>.*?</w:pBdr>|$hr|og;

$content =~ s{<w:caps/>.*?(<w:t>|<w:t [^>]+>)(.*?)</w:t>}/uc $2/oge;

$content =~ s{<w:hyperlink r:id="(.*?)".*?>(.*?)</w:hyperlink>}/hyperlink($1,$2)/oge;

$content =~ s/<w:p[^>]+?>(.*?)<\/w:p>/processParagraph($1)/oge;

$content =~ s{<w:p [^/>]+?/>|</w:p>|<w:br/>}|$config_newLine|og;
$content =~ s/<.*?>//og;


#
# Convert non-ASCII characters/character sequences to ASCII characters.
#

$content =~ s/(\xC2|\xC3|\xCF|\xE2.)(.)/($splchars{$1}{$2} ? $splchars{$1}{$2} : $1.$2)/oge;

#
# Convert docx specific (reserved HTML/XHTML) escape characters.
#
$content =~ s/(&)(amp|apos|gt|lt|quot)(;)/$escChrs{lc $2}/iog;

#
# Write the extracted and converted text contents to output.
#

print $txtfile $content;
close $txtfile;