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https://github.com/akretion/factur-x

Python lib for Factur-X, the e-invoicing standard for France and Germany
https://github.com/akretion/factur-x

e-invoice odoo

Last synced: about 2 months ago
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Python lib for Factur-X, the e-invoicing standard for France and Germany

Host: GitHub
URL: https://github.com/akretion/factur-x
Owner: akretion
License: other
Created: 2017-09-09T23:15:25.000Z (about 7 years ago)
Default Branch: master
Last Pushed: 2023-08-15T19:29:09.000Z (about 1 year ago)
Last Synced: 2024-02-24T02:23:04.956Z (7 months ago)
Topics: e-invoice, odoo
Language: Python
Size: 202 KB
Stars: 133
Watchers: 24
Forks: 49
Open Issues: 14
Metadata Files:
- Readme: README.rst
- License: LICENSE

Awesome Lists containing this project

awesome-billing - Factur-X - Python library to support the e-invoicing standard for France and Germany. (Invoice / Electronic invoices)

README

Factur-X and Order-X Python library
===================================

Factur-X is a Franco-German e-invoicing standard which complies with the European e-invoicing standard `EN 16931 `_. The Factur-X specifications are available on the `FNFE-MPE website `_ in English and French. The Factur-X standard is also called `ZUGFeRD 2.2 in Germany `_.

Order-X is the equivalent of Factur-X for purchase orders. The Order-X specifications are available in English on `the FNFE-MPE website `_ and on the `FeRD website `_.

The main feature of this Python library is to generate Factur-X invoices and Order-X orders from a regular PDF document and a Factur-X or Order-X compliant XML file.

This lib provides additionnal features such as:

* extract the XML file from a Factur-X or Order-X PDF file,
* check a Factur-X or Order-X XML file against the official `XML Schema Definition `_.

Some of the features provided by this lib also work for ZUGFeRD 1.0 (the ancestor of the Factur-X standard).

Installation
============

To install it on Linux, run:

.. code::

sudo pip3 install --upgrade factur-x

Usage
=====

.. code::

from facturx import generate_from_file

generate_from_file(regular_pdf_file, xml_file)

The PDF file *regular_pdf_file* will be updated to Factur-X/Order-X. If you want to write the resulting Factur-X/Order-X PDF to another file, use the argument *output_pdf_file*.

To have more examples, look at the docstrings in the source code or look at the source code of the command line tools located in the *bin* subdirectory.

Command line tools
==================

Several command line tools are provided with this lib:

* **facturx-pdfgen**: generate a Factur-X or Order-X PDF file from a regular PDF file and an XML file
* **facturx-pdfextractxml**: extract the XML file from a Factur-X or Order-X PDF file
* **facturx-xmlcheck**: check a Factur-X or Order-X XML file against the official XML Schema Definition

All these commande line tools have a **--help** option that explains how to use them and shows all the available options.

Tutorial: generate a Factur-X invoice under Windows
===================================================

Download the last version of Python for Windows from `python.org/downloads `_.

Launch the installer. On the first screen of the installer, enable the option **Add python.exe to PATH**. At the end of the installation process, the installer displays a screen with the message **Setup was successful** ; at that step, it may propose you **Disable path length limit** with a help message that says *Changes your machine configuration to allow programs, including Python, to bypass the 260 character "MAX_PATH" limitation*. You must accept this proposal (otherwise the installation of the factur-x library will fail): click on the label **Disable path length limit** and follow the instructions.

Open a Windows command prompt as Administrator and enter the following command to download and install the factur-x library:

.. code::

pip3 install --upgrade factur-x

Look at the installation logs and make sure there are no error messages. Close the Windows command prompt.

Open a new Windows command prompt (not as Administrator) and enter the following command (adapt the path to your filesystem):

.. code::

python C:\Users\Alexis\AppData\Local\Programs\Python\Python311\Scripts\facturx-pdfgen --help

It should display the help of the command *facturx-pdfgen*.

Enter the following command to generate a Factur-X invoice:

.. code::

python C:\Users\Alexis\AppData\Local\Programs\Python\Python311\Scripts\facturx-pdfgen C:\Users\Alexis\Documents\invoice.pdf C:\Users\Alexis\Documents\fx.xml C:\Users\Alexis\Documents\invoice-facturx.pdf

where:

* *C:\\Users\\Alexis\\Documents\\invoice.pdf* is the original PDF invoice,
* *C:\\Users\\Alexis\\Documents\\fx.xml* is the Factur-X XML file,
* *C:\\Users\\Alexis\\Documents\\invoice-facturx.pdf* is the Factur-X PDF invoice that will be generated.

Webservice
==========

This project also provides a webservice to generate a Factur-X or Order-X PDF file from a regular PDF file, the XML file and additional attachments (if any). This webservice uses `Flask `_. To run the webservice, run **facturx-webservice** available in the *bin* subdirectory of the project. To query the webservice, you must send an **HTTP POST** request in **multipart/form-data** using the following keys:

* **pdf** -> PDF file (required)
* **xml** -> Factur-X or Order-X file (any profile, required)
* **attachment1** -> First attachment (optional)
* **attachment2** -> Second attachment (optional)
* ...

To deploy this webservice in production, follow the `guidelines `_ of the official Flask documentation: you should use a WSGI server (such as `Gunicorn `_) and a reverse proxy (such as `Nginx `_ or `Apache `_). You will certainly have to increase the default maximum upload size (default value is only 1MB under Nginx!): use the parameter **client_max_body_size** for Nginx and **LimitRequestBody** for Apache.

I recommend this `tutorial `_ (in French) which explains how to deploy a Flask application with Gunicorn and Nginx on Ubuntu.

You can use `curl `_, a command line tool to send HTTP requests (on Linux Ubuntu/Debian, just install the **curl** package) to generate the request:

.. code::

curl -X POST -F 'pdf=@/home/me/regular_invoice.pdf' -F 'xml=@/home/me/factur-x.xml' -F 'attachment1=@/home/me/delivery_note.pdf' -o /home/me/facturx_invoice.pdf https://ws.fnfe-mpe.org/generate_facturx

A public instance of this webservice is available on a server of `FNFE-MPE `_ at the URL **https://ws.fnfe-mpe.org/generate_facturx**.

Licence
=======

This library is published under the BSD licence (same licence as `pypdf `_ on which this lib depends).

Contributors
============

* Alexis de Lattre

Changelog
=========

* Version 3.1 dated 2023-08-13

* Keep bookmarks, annotations, etc. from input PDF file. For that, we use the method clone_document_from_reader() of pypdf instead of append_pages_from_reader()
* Fix bug on xml type parsing (bug introduced in version 3.0)
* raise explicit error when trying to generate a ZUGFeRD 1.x PDF invoice

* Version 3.0 dated 2023-08-13

* Replace dependency on PyPDF4 by pypdf. The development focus is back on **pypdf** and the forks PyPDF2, PyPDF3 and PyPDF4 are not maintained any more, cf this `article `_.
* Remove support for Python 2.7
* In the scripts, replace /usr/bin/python3 by /usr/bin/env python

* Version 2.5 dated 2023-03-24

* Add support for ZUGFeRD 1.0 in get_level()
* xml_check_xsd(): avoid warning *Use specific 'len(elem)' or 'elem is not None' test instead.*

* Version 2.4 dated 2023-03-13

* Update Factur-X XSD of all profiles to version 1.0.6
* Update Order-X XSD of all profiles to version 1.0.0

* Version 2.3 dated 2021-04-12

* Fix wrong flavor argument passed by generate_facturx_from_file() to generate_from_file()

* Version 2.2 dated 2021-04-08

* Make method generate_from_binary() accessible via the lib

* Version 2.1 dated 2021-04-07

* Update Order-X XSD to the latest version provided to me by FNFE-MPE

* Version 2.0 dated 2021-04-04

* Add support for **Order-X**. This implies several changes:

* method *check_facturx_xsd()* deprecated in favor of the new method *xml_check_xsd()* but still operates with a warning
* method *get_facturx_flavor()* deprecated in favor of the new method *get_flavor()* but still operates with a warning
* method *generate_facturx_from_binary()* deprecated in favor of the new method *generate_from_binary()* but still operates with a warning
* method *generate_facturx_from_file()* deprecated in favor of the new method *generate_from_file()* but still operates with a warning
* new optional argument *orderx_type* for methods *generate_from_file()* and *generate_from_binary()* with default value *autodetect*
* new method *get_orderx_type()* to get the Order-X type (order, order change or order response)
* new method *get_xml_from_pdf()* that work both on Factur-X and Order-X (the method get_facturx_xml_from_pdf() still exists and only operates on Factur-X)
* scripts updated

* Add **lang** argument to methods *generate_from_file()* and *generate_from_binary()* to set the lang of the PDF. This is one of the requirements for PDF accessibility, which is important for people with disabilities: it allows PDF speech synthesizers for blind people to choose the right language.
* Add ability to choose the AFRelationship PDF property for the Factur-X/Order-X XML file and also for the additionnal attachments:

* new argument *afrelationship* for methods *generate_from_file()* and *generate_from_binary()*
* new key *afrelationship* for the *attachments* dict as argument of *generate_from_file()* and *generate_from_binary()*

* Argument *additional_attachments* was deprecated in method *generate_facturx_from_file()* in version 1.8: it doesn't operate any more and only displays a warning.
* Replace the *optparse* lib by the *argparse* lib in scripts.

* Version 1.12 dated 2020-07-16

* Compress attachments and XMP metadata using Flate compression

* Version 1.11 dated 2020-05-11

* Fix crash UnicodeEncodeError on Python 2.7

* Version 1.10 dated 2020-04-14

* Update XSD of all profiles to Factur-X version 1.0.5

* Version 1.9 dated 2020-02-11

* Improve Python3 support in get_facturx_xml_from_pdf()

* Version 1.8 dated 2020-01-16

* New tool facturx-webservice which implements a REST webservice using Flask to generate a Factur-X PDF invoice via a simple POST request.
* New argument 'attachments' for generate_facturx_from_file() which replaces argument additional_attachments:

* Possibility to set a filename for the attachment different from filename of the filepath
* Possibility to set creation dates for attachments
* Update script facturx-pdfgen to use the new attachments argument

* Version 1.7 dated 2020-01-13

* Fix bug in release 1.6 in XMP: variables were not replaced by their real value

* Version 1.6 dated 2020-01-09

* Generate XMP (XML-based PDF metadata) via string replacement instead of using XML lib

* Version 1.5 dated 2019-11-13

* Fix bug in generate_facturx_from_file() when using argument additional_attachments

* Version 1.4 dated 2019-07-24

* Update Factur-X XSD to the final version of Factur-X v1.0.04
* Support XML extraction with ZUGFeRD invoices using 'zugferd-invoice.xml' filename (instead of the filename 'ZUGFeRD-invoice.xml' specified by the standard)

* Version 1.3 dated 2019-06-12

* Add XSD files for Extended profile in the Python package

* Version 1.2 dated 2019-06-12

* add support for the Extended profile
* validate XML for Minimum and Basic WL profiles with the XSD of profile EN 16931, as asked by Cyrille Sautereau
* minor improvements in the code for /Kids

* Version 1.1 dated 2019-04-22

* Improve support for embedded files extraction by adding support for /Kids

* Version 1.0 dated 2019-01-26

* Use PyPDF4 instead of PyPDF2, because there are no new releases of PyPDF2 since May 2016 (cf https://github.com/mstamy2/PyPDF2/wiki/State-of-PyPDF2-and-Future-Plans), and we need a recent version of PyPDF2 to be able to generate fully compliant PDF/A-3 files.

* Version 0.9 dated 2019-01-25

* Port to python 3 contributed by JoshuaJan (https://github.com/joshuajan)
* Fix path to ZUGFeRD 1.0 XSD

* Version 0.8 dated 2018-06-10

* Make pretty_print work for XMP file, for better readability of that file

* Version 0.7 dated 2018-05-24

* Fix XMP structure under /x:xmpmeta/rdf:RDF/rdf:Description (use XML tags instead of XML attributes)
* declare PDF-1.6 instead of PDF-1.3 (still declared by default by pyPDF2)

* Version 0.6 dated 2018-05-01

* Now fully PDF/A-3 compliant with additionnal attachments (tested with veraPDF)
* facturx-pdfgen: don't overwrite by default and add --overwrite option
* Add factur-x library version number in metadata creator entry

* Version 0.5 dated 2018-03-29

* Fix XMP metadata structure
* Now fully PDF/A-3 compliant when the input PDF file is PDF/A compliant (tested with veraPDF). This implied copying /OutputIntents and /ID datas from source PDF to Factur-X PDF.
* Fix support for additionnal attachments: they can now all be saved with Acrobat Reader
* Improve XML extraction from PDF Factur-x file

* Version 0.4 dated 2018-03-27

* Factur-x specs say /AFRelationship must be /Data (and not /Alternative)
* Update Factur-X XSD to v1.0 final
* Add support for additionnal attachments
* Add factur-x lib version in Creator metadata table
* Add /PageMode = /UseAttachments, so that the attachments are displayed by default when opening Factur-X PDF invoice with Acrobat Reader
* Improve and enrich PDF objects (ModDate, CheckSum, Size)