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WSGI middleware should call "close" on iterable if available #6

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WSGI middleware should call "close" on iterable if available #6

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18 changes: 16 additions & 2 deletions repoze/tm/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ def __init__(self, application, commit_veto=None):
self.application = application
self.commit_veto = commit_veto
self.transaction = transaction # for testing

def __call__(self, environ, start_response):
transaction = self.transaction
environ[ekey] = True
Expand All @@ -47,8 +47,10 @@ def save_status_and_headers(status, headers, exc_info=None):
ctx.update(status=status, headers=headers)
return start_response(status, headers, exc_info)

iterable = None
try:
for chunk in self.application(environ, save_status_and_headers):
iterable = self.application(environ, save_status_and_headers)
for chunk in iterable:
yield chunk
except Exception:
"""Saving the exception"""
Expand All @@ -58,6 +60,18 @@ def save_status_and_headers(status, headers, exc_info=None):
reraise(type_, value, tb)
finally:
del type_, value, tb
finally:
if hasattr(iterable, 'close'):
try:
iterable.close()
except Exception:
"""Saving the exception"""
try:
type_, value, tb = sys.exc_info()
self.abort()
reraise(type_, value, tb)
finally:
del type_, value, tb

# ZODB 3.8 + has isDoomed
if hasattr(transaction, 'isDoomed') and transaction.isDoomed():
Expand Down