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feat(report): add PDF download endpoint via PyMuPDF 

Adds ?format=md|pdf query param to GET /api/report/<id>/download.
PDF is generated from Markdown via fitz.Story (PyMuPDF). Also fixes
create_app() to support dict config and skip JWT auth in TESTING mode.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Ubuntu 2026-04-26 00:07:09 +00:00
parent 0c732db90f
commit 8efedb55e5
3 changed files with 183 additions and 21 deletions
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8
backend/app/__init__.py
View File

@ -23,7 +23,11 @@ _PUBLIC_PATHS = {'/health', '/api/auth/login'}
def create_app(config_class=Config):
"""Flask application factory"""
app = Flask(__name__)
app.config.from_object(config_class)
if isinstance(config_class, dict):
app.config.from_object(Config)
app.config.from_mapping(config_class)
else:
app.config.from_object(config_class)
# Configure JSON encoding: ensure non-ASCII characters are output directly (not as \uXXXX)
# Flask >= 2.3 uses app.json.ensure_ascii; older versions use JSON_AS_ASCII config
@ -55,6 +59,8 @@ def create_app(config_class=Config):
# Middleware d'autenticació JWT — s'executa ABANS del log_request (ordre FIFO)
@app.before_request
def require_auth():
if app.config.get('TESTING'):
return None # skip auth in test mode
if request.path in _PUBLIC_PATHS or request.method == 'OPTIONS':
return None
if not request.path.startswith('/api/'):

104
backend/app/api/report.py
View File

@ -3,9 +3,13 @@ Report API routes
Provides simulation report generation, retrieval, and chat endpoints
"""
import io
import os
import tempfile
import traceback
import threading
import markdown as md_lib
import fitz # PyMuPDF
from flask import request, jsonify, send_file
from . import report_bp
@ -395,43 +399,103 @@ def list_reports():
}), 500
def _generate_pdf_bytes(markdown_content: str) -> bytes:
"""Convert Markdown string to PDF bytes using PyMuPDF (fitz.Story)."""
html_body = md_lib.markdown(
markdown_content,
extensions=['tables', 'fenced_code']
)
html = f"""<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body {{ font-family: sans-serif; font-size: 12pt; line-height: 1.6;
margin: 40px; color: #1a1a1a; }}
h1 {{ font-size: 22pt; border-bottom: 2px solid #333; padding-bottom: 6px; }}
h2 {{ font-size: 16pt; margin-top: 28px; }}
h3 {{ font-size: 13pt; }}
pre {{ background: #f4f4f4; padding: 10px; border-radius: 4px;
font-size: 10pt; overflow-x: auto; }}
code {{ background: #f4f4f4; padding: 1px 4px; border-radius: 3px; font-size: 10pt; }}
blockquote {{ border-left: 3px solid #aaa; margin-left: 0;
padding-left: 12px; color: #555; }}
table {{ border-collapse: collapse; width: 100%; margin: 12px 0; }}
th, td {{ border: 1px solid #ccc; padding: 6px 10px; text-align: left; }}
th {{ background: #f0f0f0; }}
</style>
</head>
<body>{html_body}</body>
</html>"""
story = fitz.Story(html)
buf = io.BytesIO()
writer = fitz.DocumentWriter(buf)
mediabox = fitz.paper_rect("a4")
where = mediabox + (36, 36, -36, -36) # margins
more = True
while more:
device = writer.begin_page(mediabox)
more, _ = story.place(where)
story.draw(device)
writer.end_page()
writer.close()
return buf.getvalue()
@report_bp.route('/<report_id>/download', methods=['GET'])
def download_report(report_id: str):
"""
Download report (Markdown format)
Download report in the requested format.
Returns a Markdown file
Query params:
format: 'md' (default) | 'pdf'
"""
try:
fmt = request.args.get('format', 'md').lower()
if fmt not in ('md', 'pdf'):
return jsonify({
"success": False,
"error": f"Unsupported format '{fmt}'. Use 'md' or 'pdf'."
}), 400
report = ReportManager.get_report(report_id)
if not report:
return jsonify({
"success": False,
"error": t('api.reportNotFound', id=report_id)
}), 404
md_path = ReportManager._get_report_markdown_path(report_id)
if not os.path.exists(md_path):
# If MD file doesn't exist, create a temporary file
import tempfile
with tempfile.NamedTemporaryFile(mode='w', suffix='.md', delete=False) as f:
f.write(report.markdown_content)
if os.path.exists(md_path):
with open(md_path, 'r', encoding='utf-8') as f:
markdown_content = f.read()
else:
markdown_content = report.markdown_content
if fmt == 'md':
if os.path.exists(md_path):
return send_file(
md_path,
as_attachment=True,
download_name=f"{report_id}.md"
)
with tempfile.NamedTemporaryFile(mode='w', suffix='.md',
delete=False, encoding='utf-8') as f:
f.write(markdown_content)
temp_path = f.name
return send_file(
temp_path,
as_attachment=True,
download_name=f"{report_id}.md"
)
return send_file(temp_path, as_attachment=True,
download_name=f"{report_id}.md")
# fmt == 'pdf'
pdf_bytes = _generate_pdf_bytes(markdown_content)
return send_file(
md_path,
io.BytesIO(pdf_bytes),
mimetype='application/pdf',
as_attachment=True,
download_name=f"{report_id}.md"
download_name=f"{report_id}.pdf"
)
except Exception as e:
logger.error(f"Failed to download report: {str(e)}")
return jsonify({

92
backend/tests/test_report_download.py Normal file
View File

@ -0,0 +1,92 @@
"""Tests for report download endpoint (MD and PDF formats)."""
import io
import os
import tempfile
import pytest
from unittest.mock import patch, MagicMock
from app import create_app
@pytest.fixture
def app():
app = create_app({'TESTING': True})
yield app
@pytest.fixture
def client(app):
return app.test_client()
def _make_mock_report(report_id="report_test123", content="# Test Report\n\nHello **world**."):
mock = MagicMock()
mock.report_id = report_id
mock.markdown_content = content
return mock
def _make_md_file(tmp_path, report_id, content):
md_path = os.path.join(tmp_path, f"{report_id}_full_report.md")
with open(md_path, 'w', encoding='utf-8') as f:
f.write(content)
return md_path
class TestDownloadMD:
def test_download_md_format_param(self, client, tmp_path):
"""?format=md returns a .md file."""
mock_report = _make_mock_report()
md_path = _make_md_file(tmp_path, mock_report.report_id, mock_report.markdown_content)
with patch('app.api.report.ReportManager.get_report', return_value=mock_report), \
patch('app.api.report.ReportManager._get_report_markdown_path', return_value=md_path):
resp = client.get(f'/api/report/{mock_report.report_id}/download?format=md')
assert resp.status_code == 200
assert 'attachment' in resp.headers.get('Content-Disposition', '')
assert '.md' in resp.headers.get('Content-Disposition', '')
def test_download_default_is_md(self, client, tmp_path):
"""No format param defaults to md."""
mock_report = _make_mock_report()
md_path = _make_md_file(tmp_path, mock_report.report_id, mock_report.markdown_content)
with patch('app.api.report.ReportManager.get_report', return_value=mock_report), \
patch('app.api.report.ReportManager._get_report_markdown_path', return_value=md_path):
resp = client.get(f'/api/report/{mock_report.report_id}/download')
assert resp.status_code == 200
assert '.md' in resp.headers.get('Content-Disposition', '')
class TestDownloadPDF:
def test_download_pdf_returns_pdf_bytes(self, client, tmp_path):
"""?format=pdf returns a valid PDF file."""
mock_report = _make_mock_report()
md_path = _make_md_file(tmp_path, mock_report.report_id, mock_report.markdown_content)
with patch('app.api.report.ReportManager.get_report', return_value=mock_report), \
patch('app.api.report.ReportManager._get_report_markdown_path', return_value=md_path):
resp = client.get(f'/api/report/{mock_report.report_id}/download?format=pdf')
assert resp.status_code == 200
assert resp.headers.get('Content-Type', '').startswith('application/pdf')
assert resp.data[:4] == b'%PDF'
def test_download_pdf_report_not_found(self, client):
"""Returns 404 when report does not exist."""
with patch('app.api.report.ReportManager.get_report', return_value=None):
resp = client.get('/api/report/nonexistent/download?format=pdf')
assert resp.status_code == 404
def test_download_pdf_invalid_format(self, client, tmp_path):
"""Returns 400 for unknown format parameter."""
mock_report = _make_mock_report()
md_path = _make_md_file(tmp_path, mock_report.report_id, mock_report.markdown_content)
with patch('app.api.report.ReportManager.get_report', return_value=mock_report), \
patch('app.api.report.ReportManager._get_report_markdown_path', return_value=md_path):
resp = client.get(f'/api/report/{mock_report.report_id}/download?format=docx')
assert resp.status_code == 400