GuangYu/certificate-system
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新增PDF批量预生成

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This commit is contained in:
Nelson
2026-06-23 13:59:56 +08:00
parent b6be8b4593
commit 4742c175c3
18 changed files with 725 additions and 24 deletions
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16
backend/app/services/pdf.py
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@@ -64,6 +64,12 @@ def update_pdf_access_time(certificate: Certificate) -> None:
certificate.pdf_last_accessed_at = datetime.utcnow()
def mark_pdf_generated(certificate: Certificate, output_path: Path) -> None:
certificate.pdf_status = "generated"
certificate.pdf_file_path = str(output_path)
update_pdf_access_time(certificate)
def certificate_template_path() -> Path:
assets_dir = Path(__file__).resolve().parents[1] / "assets"
for name in ["certificate-template.png", "certificate-template.jpg"]:
@@ -88,24 +94,20 @@ def render_certificate_pdf(
template_path = certificate_template_path()
latest_renderer_mtime = max(template_path.stat().st_mtime, Path(__file__).stat().st_mtime)
if cached_pdf_is_fresh(output_path) and output_path.stat().st_mtime >= latest_renderer_mtime:
# 更新访问时间
update_pdf_access_time(certificate)
mark_pdf_generated(certificate, output_path)
return output_path
pdf_generation_limiter.acquire(max(1, concurrency_limit))
try:
if cached_pdf_is_fresh(output_path) and output_path.stat().st_mtime >= latest_renderer_mtime:
update_pdf_access_time(certificate)
mark_pdf_generated(certificate, output_path)
return output_path
image = render_certificate_image(certificate, learner, project)
image.save(output_path, "PDF", resolution=pdf_resolution(image))
finally:
pdf_generation_limiter.release()
certificate.pdf_status = "generated"
certificate.pdf_file_path = str(output_path)
# 更新访问时间
update_pdf_access_time(certificate)
mark_pdf_generated(certificate, output_path)
return output_path