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rclpdf
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#!/bin/sh
# @(#$Id: rclpdf,v 1.10 2007-07-12 17:13:38 dockes Exp $ (C) 2004 J.F.Dockes
# This is copied almost verbatim from Estraier:
#================================================================
# Estraier: a personal full-text search system
# Copyright (C) 2003-2004 Mikio Hirabayashi
#================================================================
#================================================================
# Convert a pdf file to HTML.
#
# We use pdftotxt from the xpdf package. This does not perfect results as
# whitespace is sometimes either arbitrarily inserted or stripped from the
# text. This seems to depend on the usage of option -raw, and,
# unfortunately also of the document itself, so that there does not seem to
# be an universally good solution
#
# Also, the filter sometimes seems to output problematic utf-8. I did not
# check if it was actually incorrect or just mis-understood by qtextedit
# (tobedone)
# Uncomment the following if you get better results without. The
# pdftotext manual says that the option is no longer recommended The
# difference in output seems mostly the removal of soft-hyphens when
# -raw is not set
# optionraw=-raw
# set variables
LANG=C ; export LANG
LC_ALL=C ; export LC_ALL
progname="rclpdf"
filetype=pdf
#RECFILTCOMMONCODE
##############################################################################
# !! Leave the previous line unmodified!! Code imported from the
# recfiltcommon file
# Utility code common to all shell filters. This could be sourced at run
# time, but it's slightly more efficient to include the code in the
# filters at build time (with a sed script).
# Describe error in a way that can be interpreted by our caller
senderror()
{
echo RECFILTERROR $*
# Also alert on stderr just in case
echo ":2:$progname::: $*" 1>&2
exit 1
}
iscmd()
{
cmd=$1
case $cmd in
*/*)
if test -x $cmd -a ! -d $cmd ; then return 0; else return 1; fi ;;
*)
oldifs=$IFS; IFS=":"; set -- $PATH; IFS=$oldifs
for d in $*;do test -x $d/$cmd -a ! -d $d/$cmd && return 0;done
return 1 ;;
esac
}
checkcmds()
{
for cmd in $*;do
if iscmd $cmd
then
a=1
else
senderror HELPERNOTFOUND $cmd
fi
done
}
# show help message
if test $# -ne 1 -o "$1" = "--help"
then
echo "Convert a $filetype file to HTML text for Recoll indexing."
echo "Usage: $progname [infile]"
exit 1
fi
infile="$1"
# check the input file existence (may be '-' for stdin)
if test "X$infile" != X- -a ! -f "$infile"
then
senderror INPUTNOSUCHFILE "$infile"
fi
# protect access to our temp files and directories
umask 77
##############################################################################
# !! Leave the following line unmodified !
#ENDRECFILTCOMMONCODE
checkcmds pdftotext iconv awk
# Run pdftotext and fix the result (add a charset tag and fix the html escaping
# The strange 'BEGIN' setup is to prevent 'file' from thinking this file
# is an awk program
pdftotext $optionraw -htmlmeta -enc UTF-8 -eol unix -q "$infile" - |
iconv -f UTF-8 -t UTF-8 -c -s |
awk 'BEGIN'\
' {
doescape = 0
cont = ""
charsetmeta = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">"
}
{
$0 = cont $0
cont = ""
# Insert charset meta tag at end of header
if(doescape == 0 && $0 ~ /<\/head>/) {
match($0, /<\/head>/)
part1 = substr($0, 0, RSTART-1)
part2 = substr($0, RSTART, length($0))
$0 = part1 charsetmeta part2
}
if(doescape == 0 && $0 ~ /<title>.*<\/title>/){
match($0, /<title>.*<\/title>/)
part1 = substr($0, 0, RSTART-1)
mid = substr($0, RSTART, RLENGTH)
part2 = substr($0, RSTART + RLENGTH, length($0))
gsub(/<title>/, "", mid)
gsub(/<\/title>/, "", mid)
gsub(/&/, "\\&", mid)
gsub(/</, "\\<", mid)
gsub(/>/, "\\>", mid)
mid = "<title>" mid "</title>"
$0 = part1 mid part2
}
if ($0 == "<pre>"){
# Begin of body text. need to escape some chars from now on as
# pdftotext sometimes doesnt do it
doescape++
print $0
next
} else if ($0 ~ /<\/pre>/){
doescape--
print $0
next
} else if ($0 ~ /[-]$/) {
# Note : soft-hyphen is iso8859 0xad
# Break at last whitespace
match($0, "[ \t][^ \t]+$")
line = substr($0, 0, RSTART)
cont = substr($0, RSTART, RLENGTH-1)
$0 = line
# print "LINE [" $0 "] CONT[" cont "]"
} else if($0 == "\f"){
$0 = "<hr>"
print
next
}
if(doescape > 0){
gsub(/&/, "\\&", $0)
gsub(/</, "\\<", $0)
gsub(/>/, "\\>", $0)
}
print $0
}
'