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62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
import logging
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import time
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from collections.abc import Mapping
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from typing import Any
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import click
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from celery import shared_task
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from flask import render_template_string
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from jinja2.runtime import Context
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from jinja2.sandbox import ImmutableSandboxedEnvironment
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from configs import dify_config
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from configs.feature import TemplateMode
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from extensions.ext_mail import mail
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from libs.email_i18n import get_email_i18n_service
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logger = logging.getLogger(__name__)
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class SandboxedEnvironment(ImmutableSandboxedEnvironment):
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def __init__(self, timeout: int, *args: Any, **kwargs: Any):
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self._timeout_time = time.time() + timeout
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super().__init__(*args, **kwargs)
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def call(self, context: Context, obj: Any, *args: Any, **kwargs: Any) -> Any:
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if time.time() > self._timeout_time:
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raise TimeoutError("Template rendering timeout")
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return super().call(context, obj, *args, **kwargs)
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def _render_template_with_strategy(body: str, substitutions: Mapping[str, str]) -> str:
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mode = dify_config.MAIL_TEMPLATING_MODE
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timeout = dify_config.MAIL_TEMPLATING_TIMEOUT
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if mode == TemplateMode.UNSAFE:
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return render_template_string(body, **substitutions)
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if mode == TemplateMode.SANDBOX:
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tmpl = SandboxedEnvironment(timeout=timeout).from_string(body)
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return tmpl.render(substitutions)
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if mode == TemplateMode.DISABLED:
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return body
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raise ValueError(f"Unsupported mail templating mode: {mode}")
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@shared_task(queue="mail")
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def send_inner_email_task(to: list[str], subject: str, body: str, substitutions: Mapping[str, str]):
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if not mail.is_inited():
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return
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logger.info(click.style(f"Start enterprise mail to {to} with subject {subject}", fg="green"))
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start_at = time.perf_counter()
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try:
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html_content = _render_template_with_strategy(body, substitutions)
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email_service = get_email_i18n_service()
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email_service.send_raw_email(to=to, subject=subject, html_content=html_content)
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end_at = time.perf_counter()
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logger.info(click.style(f"Send enterprise mail to {to} succeeded: latency: {end_at - start_at}", fg="green"))
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except Exception:
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logger.exception("Send enterprise mail to %s failed", to)
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