feat: Mini-Cloud Plattform - komplette Implementierung Phase 0-8
Selbstgehostete Web-Cloud mit Dateiverwaltung, Kalender, Kontakte, Email-Webclient, Office-Viewer und Passwort-Manager. Backend (Flask/Python): - JWT-Auth mit Access/Refresh Tokens, Benutzerverwaltung - Dateien: Upload/Download, Ordner, Berechtigungen, Share-Links - Kalender: CRUD, Teilen, iCal-Export, CalDAV well-known URLs - Kontakte: Adressbuecher, vCard-Export, Teilen - Email: IMAP/SMTP-Proxy, Multi-Account - Office-Viewer: DOCX/XLSX/PPTX/PDF Vorschau - Passwort-Manager: AES-256-GCM clientseitig, KeePass-Import - Sync-API fuer Desktop/Mobile-Clients - SQLite mit WAL-Modus Frontend (Vue 3 + PrimeVue): - Datei-Explorer mit Breadcrumbs und Share-Dialogen - Monatskalender mit Event-Verwaltung - Kontaktliste mit Adressbuch-Sidebar - Email-Client mit 3-Spalten-Layout - Passwort-Manager mit TOTP und Passwort-Generator - Admin-Panel, Settings, oeffentliche Share-Seite Docker: Multi-Stage Build, Bind Mounts (keine Volumes) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Stefan Hacker
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import io
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from pathlib import Path
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from flask import request, jsonify, current_app, send_file
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from app.api import api_bp
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from app.api.auth import token_required
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from app.api.files import _get_file_or_403
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from app.extensions import db
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@api_bp.route('/files/<int:file_id>/preview', methods=['GET'])
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@token_required
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def preview_file(file_id):
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user = request.current_user
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f, err = _get_file_or_403(file_id, user, 'read')
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if err:
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return err
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if f.is_folder:
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return jsonify({'error': 'Ordner haben keine Vorschau'}), 400
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mime = f.mime_type or ''
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filepath = Path(current_app.config['UPLOAD_PATH']) / str(f.owner_id) / f.storage_path
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if not filepath.exists():
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return jsonify({'error': 'Datei nicht gefunden'}), 404
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# PDF -> just return URL for PDF.js to load
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if 'pdf' in mime:
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return jsonify({
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'type': 'pdf',
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'url': f'/api/files/{file_id}/download',
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'name': f.name,
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}), 200
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# DOCX
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if mime in ('application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'application/msword') or f.name.endswith('.docx'):
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try:
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html = _convert_docx(filepath)
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return jsonify({'type': 'html', 'content': html, 'name': f.name}), 200
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except Exception as e:
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return jsonify({'error': f'DOCX-Vorschau fehlgeschlagen: {str(e)}'}), 500
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# XLSX
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if mime in ('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
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'application/vnd.ms-excel') or f.name.endswith('.xlsx'):
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try:
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data = _convert_xlsx(filepath)
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return jsonify({'type': 'spreadsheet', 'sheets': data, 'name': f.name}), 200
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except Exception as e:
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return jsonify({'error': f'XLSX-Vorschau fehlgeschlagen: {str(e)}'}), 500
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# PPTX
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if mime in ('application/vnd.openxmlformats-officedocument.presentationml.presentation',
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'application/vnd.ms-powerpoint') or f.name.endswith('.pptx'):
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try:
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slides = _convert_pptx(filepath)
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return jsonify({'type': 'slides', 'slides': slides, 'name': f.name}), 200
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except Exception as e:
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return jsonify({'error': f'PPTX-Vorschau fehlgeschlagen: {str(e)}'}), 500
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# Images
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if mime.startswith('image/'):
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return jsonify({
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'type': 'image',
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'url': f'/api/files/{file_id}/download',
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'name': f.name,
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}), 200
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# Text files
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if mime.startswith('text/') or f.name.endswith(('.txt', '.md', '.json', '.xml', '.csv',
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'.py', '.js', '.html', '.css', '.yml', '.yaml')):
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try:
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content = filepath.read_text(encoding='utf-8', errors='replace')[:100000]
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return jsonify({'type': 'text', 'content': content, 'name': f.name}), 200
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except Exception:
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pass
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return jsonify({'type': 'unsupported', 'name': f.name, 'mime_type': mime}), 200
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def _convert_docx(filepath):
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from docx import Document
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doc = Document(str(filepath))
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html_parts = []
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for para in doc.paragraphs:
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style = para.style.name if para.style else ''
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text = para.text
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if not text.strip():
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html_parts.append('<br/>')
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continue
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if 'Heading 1' in style:
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html_parts.append(f'<h1>{text}</h1>')
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elif 'Heading 2' in style:
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html_parts.append(f'<h2>{text}</h2>')
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elif 'Heading 3' in style:
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html_parts.append(f'<h3>{text}</h3>')
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else:
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# Check for bold/italic runs
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run_html = ''
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for run in para.runs:
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t = run.text
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if run.bold:
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t = f'<strong>{t}</strong>'
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if run.italic:
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t = f'<em>{t}</em>'
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if run.underline:
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t = f'<u>{t}</u>'
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run_html += t
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html_parts.append(f'<p>{run_html}</p>')
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# Tables
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for table in doc.tables:
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html_parts.append('<table border="1" cellpadding="4" cellspacing="0" style="border-collapse: collapse; width: 100%">')
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for i, row in enumerate(table.rows):
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html_parts.append('<tr>')
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tag = 'th' if i == 0 else 'td'
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for cell in row.cells:
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html_parts.append(f'<{tag}>{cell.text}</{tag}>')
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html_parts.append('</tr>')
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html_parts.append('</table>')
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return '\n'.join(html_parts)
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def _convert_xlsx(filepath):
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from openpyxl import load_workbook
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wb = load_workbook(str(filepath), read_only=True, data_only=True)
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sheets = []
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for ws in wb.worksheets:
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rows = []
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for row in ws.iter_rows(max_row=500, values_only=True):
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rows.append([str(cell) if cell is not None else '' for cell in row])
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sheets.append({
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'name': ws.title,
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'rows': rows,
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})
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wb.close()
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return sheets
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def _convert_pptx(filepath):
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from pptx import Presentation
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prs = Presentation(str(filepath))
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slides = []
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for i, slide in enumerate(prs.slides):
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content_parts = []
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for shape in slide.shapes:
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if shape.has_text_frame:
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for para in shape.text_frame.paragraphs:
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text = para.text.strip()
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if text:
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content_parts.append(f'<p>{text}</p>')
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if shape.has_table:
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table_html = '<table border="1" cellpadding="4" style="border-collapse: collapse">'
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for row in shape.table.rows:
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table_html += '<tr>'
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for cell in row.cells:
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table_html += f'<td>{cell.text}</td>'
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table_html += '</tr>'
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table_html += '</table>'
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content_parts.append(table_html)
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slides.append({
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'index': i,
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'html': '\n'.join(content_parts) if content_parts else '<p>(Leere Folie)</p>',
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})
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return slides
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