def fail(value, contextinfo=None, srcexception=None, errcondition=None):
"""Wrapper to raise (and log) DAVError."""
if isinstance(value, Exception):
e = asDAVError(value)
else:
e = DAVError(value, contextinfo, srcexception, errcondition)
log("Raising DAVError %s" % e.getUserInfo())
raise e
def __call__(self, environ, start_response):
# Intercept start_response
sub_app_start_response = util.SubAppStartResponse()
try:
try:
# request_server app may be a generator (for example the GET handler)
# So we must iterate - not return self._application(..)!
# Otherwise the we could not catch exceptions here.
response_started = False
app_iter = self._application(environ, sub_app_start_response)
for v in app_iter:
# Start response (the first time)
if not response_started:
# Success!
start_response(sub_app_start_response.status,
sub_app_start_response.response_headers,
sub_app_start_response.exc_info)
response_started = True
yield v
# Close out iterator
if hasattr(app_iter, "close"):
app_iter.close()
# Start response (if it hasn't been done yet)
if not response_started:
# Success!
start_response(sub_app_start_response.status,
sub_app_start_response.response_headers,
sub_app_start_response.exc_info)
return
except DAVError as e:
_logger.debug("re-raising %s" % e)
raise
except Exception as e:
# Caught a non-DAVError
if self._catch_all_exceptions:
# Catch all exceptions to return as 500 Internal Error
traceback.print_exc(10, environ.get(
"wsgi.errors") or sys.stderr)
raise asDAVError(e)
else:
util.warn("ErrorPrinter: caught Exception")
traceback.print_exc(10, sys.stderr)
raise
except DAVError as e:
_logger.debug("caught %s" % e)
status = getHttpStatusString(e)
# Dump internal errors to console
if e.value == HTTP_INTERNAL_ERROR:
print("ErrorPrinter: caught HTTPRequestException("
"HTTP_INTERNAL_ERROR)", file=sys.stdout)
traceback.print_exc(10, environ.get(
"wsgi.errors") or sys.stdout)
print("e.srcexception:\n%s" % e.srcexception, file=sys.stdout)
elif e.value in (HTTP_NOT_MODIFIED, HTTP_NO_CONTENT):
# util.log("ErrorPrinter: forcing empty error response for %s"
# % e.value)
# See paste.lint: these code don't have content
start_response(status, [("Content-Length", "0"),
("Date", util.getRfc1123Time()),
])
yield b""
return
# If exception has pre-/post-condition: return as XML response,
# else return as HTML
content_type, body = e.getResponsePage()
# TODO: provide exc_info=sys.exc_info()?
start_response(status, [("Content-Type", content_type),
("Content-Length", str(len(body))),
("Date", util.getRfc1123Time()),
])
yield body
return
