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import sys
import asyncio
import inspect
from jinja2.utils import concat
async def render_async(self, *args, **kwargs):
if not self.environment._async:
raise RuntimeError('The environment was not created with async mode '
'enabled.')
vars = dict(*args, **kwargs)
ctx = self.new_context(vars)
rv = []
async def collect():
async for event in self.root_render_func(ctx):
rv.append(event)
try:
await collect()
return concat(rv)
except Exception:
exc_info = sys.exc_info()
return self.environment.handle_exception(exc_info, True)
def wrap_render_func(original_render):
def render(self, *args, **kwargs):
if not self.environment._async:
return original_render(self, *args, **kwargs)
loop = asyncio.get_event_loop()
return loop.run_until_complete(self.render_async(self, *args, **kwargs))
return render
def patch_template():
from jinja2 import Template
Template.render_async = render_async
Template.render = wrap_render_func(Template.render)
def patch_all():
patch_template()
async def auto_await(value):
if inspect.isawaitable(value):
return await value
return value
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