pdf_ext manipulates pdf and fills pdf forms via fdf files. pdftk recommended.

1 files changed, 97 insertions, 0 deletions

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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 2 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.,
+# 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+""" Copyright (c) 2003-2007 LOGILAB S.A. (Paris, FRANCE).
+ http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
+manipulate pdf and fdf files. pdftk recommended.
+
+Notes regarding pdftk, pdf forms and fdf files (form definition file) 
+fields names can be extracted with:
+    pdftk orig.pdf generate_fdf output truc.fdf
+to merge fdf and pdf:      
+    pdftk orig.pdf fill_form test.fdf output result.pdf [flatten]
+without flatten, one could further edit the resulting form.
+with flatten, everything is turned into text.
+"""
+
+import os
+
+HEAD="""%FDF-1.2
+%\xE2\xE3\xCF\xD3
+1 0 obj 
+<<
+/FDF 
+<<
+/Fields [
+"""
+
+TAIL="""]
+>>
+>>
+endobj 
+trailer
+
+<<
+/Root 1 0 R
+>>
+%%EOF
+"""
+
+def output_field( f ):
+    return "\xfe\xff" + "".join( [ "\x00"+c for c in f ] )
+
+def extract_keys(lines):
+    keys = []
+    for line in lines:
+        if line.startswith('/V'):
+            pass #print 'value',line
+        elif line.startswith('/T'):
+            key = line[7:-2]
+            key = ''.join(key.split('\x00'))
+            keys.append( key )
+    return keys
+
+def write_field(out, key, value):
+    out.write("<<\n")
+    if value:
+        out.write("/V (%s)\n" %value)
+    else:
+        out.write("/V /\n")
+    out.write("/T (%s)\n" % output_field(key) )
+    out.write(">> \n")
+
+def write_fields(out, fields):
+    out.write(HEAD)
+    for (key,value,comment) in fields:
+        write_field(out, key, value)
+        write_field(out, key+"a", value) # pour copie-carbone sur autres pages
+    out.write(TAIL)
+
+def extract_keys_from_pdf(filename):
+    # what about using 'pdftk filename dump_data_fields' and parsing the output ?
+    os.system('pdftk %s generate_fdf output /tmp/toto.fdf' % filename)
+    lines = file('/tmp/toto.fdf').readlines()
+    return extract_keys(lines)
+
+
+def fill_pdf(infile, outfile, fields):
+    write_fields(file('/tmp/toto.fdf', 'w'), fields)
+    os.system('pdftk %s fill_form /tmp/toto.fdf output %s flatten' % (infile, outfile))
+
+def testfill_pdf(filename):
+    keys = extract_keys_from_pdf(filename)
+    fields = []
+    for key in keys:
+        fields.append( (key, key, '') )
+    fill_pdf(filename, '_'+filename, fields)
+