Test
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dfuhrmann3
parent
2384b27ae1
commit
aae15f96db
174
main.py
174
main.py
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@ -1,4 +1,5 @@
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import os
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import io
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import streamlit as st
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import json
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import re
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@ -9,6 +10,8 @@ from decimal import Decimal, ROUND_HALF_UP
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import fitz
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import requests
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from pydantic import BaseModel, Field
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import pikepdf
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from facturx import generate_from_binary as facturx_generate_from_binary
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# ==========================================
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# 0. SITZUNGS-STATUS INITIALISIEREN (ZÄHLER GEGEN WIDGET-CACHING)
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@ -351,7 +354,7 @@ def generate_compliant_zugferd_cii(data):
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root = ET.Element(f"{{{RSM}}}CrossIndustryInvoice")
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ex_doc_ctx = ET.SubElement(root, f"{{{RAM}}}ExchangedDocumentContext")
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ex_doc_ctx = ET.SubElement(root, f"{{{RSM}}}ExchangedDocumentContext")
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guideline = ET.SubElement(ex_doc_ctx, f"{{{RAM}}}GuidelineSpecifiedDocumentContextParameter")
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ET.SubElement(guideline, f"{{{RAM}}}ID").text = "urn:cen.eu:en16931:2017#compliant#urn:xeinkauf.de:kosit:xrechnung_3.0"
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@ -383,7 +386,7 @@ def generate_compliant_zugferd_cii(data):
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ET.SubElement(trade_prod, f"{{{RAM}}}Description").text = str(item["description"]).strip()
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line_agree = ET.SubElement(line_item, f"{{{RAM}}}SpecifiedLineTradeAgreement")
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net_price = ET.SubElement(line_agree, f"{{{RAM}}}GrossPriceProductTradePrice")
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net_price = ET.SubElement(line_agree, f"{{{RAM}}}NetPriceProductTradePrice")
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ET.SubElement(net_price, f"{{{RAM}}}ChargeAmount").text = f"{item['unit_price']:.2f}"
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line_deliv = ET.SubElement(line_item, f"{{{RAM}}}SpecifiedLineTradeDelivery")
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@ -447,7 +450,7 @@ def generate_compliant_zugferd_cii(data):
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header_settle = ET.SubElement(trade_trans, f"{{{RAM}}}ApplicableHeaderTradeSettlement")
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ET.SubElement(header_settle, f"{{{RAM}}}InvoiceCurrencyCode").text = "EUR"
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pay_means = ET.SubElement(header_settle, f"{{{RAM}}}SpecifiedTradePaymentMeans")
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pay_means = ET.SubElement(header_settle, f"{{{RAM}}}SpecifiedTradeSettlementPaymentMeans")
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ET.SubElement(pay_means, f"{{{RAM}}}TypeCode").text = "30"
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payee_acc = ET.SubElement(pay_means, f"{{{RAM}}}PayeePartyCreditorFinancialAccount")
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ET.SubElement(payee_acc, f"{{{RAM}}}IBANID").text = str(data["iban"]).replace(" ", "")
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@ -470,7 +473,6 @@ def generate_compliant_zugferd_cii(data):
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ET.SubElement(header_sum, f"{{{RAM}}}LineTotalAmount").text = f"{data['total_net_amount']:.2f}"
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ET.SubElement(header_sum, f"{{{RAM}}}TaxBasisTotalAmount").text = f"{data['total_net_amount']:.2f}"
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ET.SubElement(header_sum, f"{{{RAM}}}TaxTotalAmount", {"currencyID": "EUR"}).text = f"{data['total_vat_amount']:.2f}"
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header_sum.find(f"{{{RAM}}}TaxTotalAmount").set("currencyID", "EUR")
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ET.SubElement(header_sum, f"{{{RAM}}}GrandTotalAmount").text = f"{data['total_gross_amount']:.2f}"
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ET.SubElement(header_sum, f"{{{RAM}}}DuePayableAmount").text = f"{data['total_gross_amount']:.2f}"
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@ -478,7 +480,43 @@ def generate_compliant_zugferd_cii(data):
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return minidom.parseString(xml_str).toprettyxml(indent=" ")
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# ==========================================
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# Pfad zum sRGB-ICC-Profil, das für ein PDF/A-3-konformes OutputIntent benötigt wird.
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# (PDF/A verlangt zwingend ein eingebettetes Farbprofil - ohne das gilt die PDF nicht als PDF/A,
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# selbst wenn XMP-Metadaten und eingebettetes XML korrekt sind.)
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SRGB_ICC_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "sRGB.icc")
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def add_pdfa_output_intent(pdf_bytes: bytes, icc_path: str = SRGB_ICC_PATH) -> bytes:
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"""
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Fügt der PDF ein OutputIntent mit sRGB-ICC-Profil hinzu, falls noch keines vorhanden ist.
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Das ist zwingend erforderlich, damit eine PDF als PDF/A-3(B) gilt (ZUGFeRD-Pflicht).
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"""
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pdf = pikepdf.open(io.BytesIO(pdf_bytes))
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try:
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if "/OutputIntents" not in pdf.Root or len(pdf.Root.get("/OutputIntents", [])) == 0:
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if not os.path.isfile(icc_path):
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raise FileNotFoundError(
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f"sRGB-ICC-Profil nicht gefunden unter '{icc_path}'. "
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"Für echte PDF/A-3-Konformität muss diese Datei mit ausgeliefert werden."
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)
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with open(icc_path, "rb") as f:
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icc_bytes = f.read()
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icc_stream = pikepdf.Stream(pdf, icc_bytes)
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icc_stream["/N"] = 3
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icc_stream["/Alternate"] = pikepdf.Name("/DeviceRGB")
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output_intent = pdf.make_indirect(pikepdf.Dictionary({
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"/Type": pikepdf.Name("/OutputIntent"),
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"/S": pikepdf.Name("/GTS_PDFA1"),
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"/OutputConditionIdentifier": pikepdf.String("sRGB IEC61966-2.1"),
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"/Info": pikepdf.String("sRGB IEC61966-2.1"),
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"/DestOutputProfile": icc_stream,
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}))
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pdf.Root["/OutputIntents"] = pikepdf.Array([output_intent])
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buf = io.BytesIO()
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pdf.save(buf)
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return buf.getvalue()
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finally:
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pdf.close()# ==========================================
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# 4. API CLIENT INITIALISIERUNG
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# ==========================================
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def get_cached_llm():
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@ -727,116 +765,40 @@ with col2:
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if st.button("🔒 ZUGFeRD PDF exportieren", type="primary", width="stretch"):
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try:
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cii_xml_string = generate_compliant_zugferd_cii(final_invoice_dict)
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uploaded_file.seek(0)
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original_pdf_bytes = uploaded_file.read()
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doc = fitz.open(stream=original_pdf_bytes, filetype="pdf")
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# 1. XML-Datei einbetten nach ZUGFeRD Standard
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doc.embfile_add(
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"factur-x.xml",
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# 1) factur-x übernimmt: XSD-Validierung der CII-XML, korrektes Einbetten
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# (Filespec mit AFRelationship=/Data, /F + /UF, Subtype text/xml) und die
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# komplette PDF/A-3-konforme XMP-Metadatenstruktur (pdfaid:part/conformance,
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# fx:-Schema-Erweiterung). Bricht die XML-Validierung fehl, wird hier ein
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# klarer Fehler geworfen statt einer stillen, ungültigen PDF.
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zugferd_pdf_bytes = facturx_generate_from_binary(
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original_pdf_bytes,
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cii_xml_string.encode("utf-8"),
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filename="factur-x.xml",
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desc="Factur-X/ZUGFeRD E-Invoice"
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flavor="factur-x",
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level="en16931",
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check_xsd=True,
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check_schematron=False, # benötigt optional 'saxonche' für Schematron-Regeln
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afrelationship="data",
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)
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# 2. XMP-Metadaten inkl. PDF/A-3-Identifikation & ZUGFeRD-Schema aufbauen
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xmp_xml = """<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?>
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<x:xmpmeta xmlns:x="adobe:ns:meta/">
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<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
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<rdf:Description rdf:about="" xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/">
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<pdfaid:part>3</pdfaid:part>
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<pdfaid:conformance>B</pdfaid:conformance>
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</rdf:Description>
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<rdf:Description rdf:about="" xmlns:pdfaExtension="http://www.aiim.org/pdfa/ns/extension/" xmlns:pdfaSchema="http://www.aiim.org/pdfa/ns/schema/" xmlns:pdfaProperty="http://www.aiim.org/pdfa/ns/property#">
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<pdfaExtension:schemas>
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<rdf:Bag>
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<rdf:li rdf:parseType="Resource">
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<pdfaSchema:schema>Factur-X PDFA Extension Schema</pdfaSchema:schema>
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<pdfaSchema:prefix>fx</pdfaSchema:prefix>
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<pdfaSchema:namespace>urn:factur-x:pdfa:CrossIndustryDocument:invoice:1p0#</pdfaSchema:namespace>
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<pdfaSchema:properties>
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<rdf:Seq>
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<rdf:li rdf:parseType="Resource">
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<pdfaProperty:name>DocumentType</pdfaProperty:name>
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<pdfaProperty:valueType>Text</pdfaProperty:valueType>
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<pdfaProperty:category>external</pdfaProperty:category>
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<pdfaProperty:description>The type of the document, usually INVOICE</pdfaProperty:description>
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</rdf:li>
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<rdf:li rdf:parseType="Resource">
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<pdfaProperty:name>DocumentFileName</pdfaProperty:name>
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<pdfaProperty:valueType>Text</pdfaProperty:valueType>
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<pdfaProperty:category>external</pdfaProperty:category>
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<pdfaProperty:description>The name of the embedded file</pdfaProperty:description>
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</rdf:li>
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<rdf:li rdf:parseType="Resource">
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<pdfaProperty:name>Version</pdfaProperty:name>
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<pdfaProperty:valueType>Text</pdfaProperty:valueType>
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<pdfaProperty:category>external</pdfaProperty:category>
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<pdfaProperty:description>The version of the document type schema</pdfaProperty:description>
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</rdf:li>
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<rdf:li rdf:parseType="Resource">
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<pdfaProperty:name>ConformanceLevel</pdfaProperty:name>
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<pdfaProperty:valueType>Text</pdfaProperty:valueType>
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<pdfaProperty:category>external</pdfaProperty:category>
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<pdfaProperty:description>The conformance level of the document</pdfaProperty:description>
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</rdf:li>
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</rdf:Seq>
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</pdfaSchema:properties>
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</rdf:li>
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</rdf:Bag>
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</pdfaExtension:schemas>
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</rdf:Description>
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<rdf:Description rdf:about="" xmlns:fx="urn:factur-x:pdfa:CrossIndustryDocument:invoice:1p0#">
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<fx:DocumentType>INVOICE</fx:DocumentType>
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<fx:DocumentFileName>factur-x.xml</fx:DocumentFileName>
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<fx:Version>1.0</fx:Version>
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<fx:ConformanceLevel>XRECHNUNG</fx:ConformanceLevel>
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</rdf:Description>
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</rdf:RDF>
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</x:xmpmeta>
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<?xpacket end="w"?>"""
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doc.set_metadata(doc.metadata, xmp=xmp_xml)
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# 3. Low-Level XREF-Injektion für strikte PDF/A-3 & ZUGFeRD Konformität
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filespec_xref = None
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for xref in range(1, doc.xref_length()):
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obj_str = doc.xref_object(xref)
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if "/Type /Filespec" in obj_str and "factur-x.xml" in obj_str:
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filespec_xref = xref
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break
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if filespec_xref:
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# 3.1 Erzwinge das /AFRelationship Attribut am eingebetteten FileSpec
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doc.xref_set_key(filespec_xref, "AFRelationship", "/Alternative")
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# 3.2 Ermittle den Catalog-Knoten und verknüpfe das XML im globalen /AF Array
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cat_xref = doc.pdf_catalog()
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doc.xref_set_key(cat_xref, "AF", f"[{filespec_xref} 0 R]")
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# 3.3 Standard-sRGB OutputIntent erstellen & injizieren (Farbprofil-Marker für PDF/A)
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oi_xref = doc.xref_create()
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oi_dict = (
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"<< /Type /OutputIntent "
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"/S /GTS_PDFA1 "
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"/OutputConditionIdentifier (sRGB) "
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"/RegistryName (http://www.color.org) "
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"/Info (sRGB IEC61966-2.1) >>"
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)
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doc.xref_update(oi_xref, oi_dict)
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doc.xref_set_key(cat_xref, "OutputIntents", f"[{oi_xref} 0 R]")
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# PDF finalisieren und umwandeln
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zugferd_pdf_bytes = doc.tobytes()
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doc.close()
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# 2) Zusätzliches OutputIntent (sRGB-ICC-Profil) ergänzen. Das ist für echte
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# PDF/A-3-Konformität zwingend, wird von factur-x aber nicht selbst gesetzt.
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zugferd_pdf_bytes = add_pdfa_output_intent(zugferd_pdf_bytes)
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st.download_button(
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label="📥 Download ZUGFeRD Hybrid-PDF",
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data=zugferd_pdf_bytes,
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file_name=f"ZUGFeRD_{inv_num}.pdf",
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mime="application/pdf"
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)
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st.info(
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"ℹ️ Hinweis: Die eingebettete CII-XML wurde gegen das offizielle EN16931-XSD-Schema "
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"validiert. Für eine vollständige PDF/A-3-Zertifizierung (z. B. Schriftarten-Einbettung "
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"der Ursprungs-PDF) empfiehlt sich zusätzlich eine Prüfung mit veraPDF."
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)
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except Exception as e:
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st.error(f"Fehler bei der ZUGFeRD-Generierung: {e}")
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@ -847,7 +809,7 @@ st.markdown("---")
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st.caption(
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"📝 **Hinweise:**\n\n"
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"**Human-in-the-Loop:** "
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"Das Tool dient als Automations-Assistent. Vor dem finalen XML-Export ist eine visuelle Endkontrolle der extrahierten Daten "
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"Das Tool dient as Automations-Assistent. Vor dem finalen XML-Export ist eine visuelle Endkontrolle der extrahierten Daten "
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"(insbesondere Rechnungsnummer und Empfängeradresse) durch den Sachbearbeiter zwingend erforderlich.\n\n"
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"**GoBD-Konformität:** "
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"Das Tool generiert ausschließlich das strukturierte XML-Format. Für die Einhaltung der GoBD-Richtlinien "
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@ -2,4 +2,5 @@ streamlit==1.58.0
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pydantic==2.13.4
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pymupdf==1.28.0
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requests==2.32.3
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factur-x>=3.8
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factur-x==5.1
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pikepdf==10.5.1
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