def write(self, chunk, status=None):
"""Writes the given chunk to the output buffer.
To write the output to the network, use the flush() method below.
If the given chunk is a dictionary, we write it as JSON and set
the Content-Type of the response to be ``application/json``.
(if you want to send JSON as a different ``Content-Type``, call
set_header *after* calling write()).
Note that lists are not converted to JSON because of a potential
cross-site security vulnerability. All JSON output should be
wrapped in a dictionary. More details at
http://haacked.com/archive/2008/11/20/anatomy-of-a-subtle-json-vulnerability.aspx
"""
if self._finished:
raise RuntimeError("Cannot write() after finish(). May be caused "
"by using async operations without the "
"@asynchronous decorator.")
if isinstance(chunk, dict):
chunk = jsonutil.json_encode(chunk)
elif isinstance(chunk, list):
chunk = jsonutil.json_encode({"list": chunk})
else:
chunk = jsonutil.json_encode({"result": chunk})
chunk = utf8(chunk)
self._write_buffer.append(chunk)
self.set_header("Content-Type", "application/json; charset=UTF-8")
if status is not None:
self.set_status(status)
def flat_attributes(self):
""" 扁平化的属性，只保留一层。
在bo转dbmodel使用
如果存在list就把list转换成字符串
如果是bo对象，就把这个对象转换成json字符串
:return:
"""
d = DefaultDict()
for name, obj in self.class_attributes:
value = getattr(self, name)
if isinstance(value, BizModel):
d[name] = jsonutil.json_encode(value.attributes)
elif isinstance(value, (list, tuple)):
if obj.generic_type and issubclass(obj.generic_type, BizModel):
values = []
for v in value:
values.append(v.attributes)
d[name] = jsonutil.json_encode(values)
else:
values = []
for v in value:
if isinstance(v, basestring) and obj.prefix:
if v.startswith(obj.prefix):
v = v.replace(obj.prefix, '', 1)
values.append(v)
else:
values.append(v)
d[name] = obj.split.join(values)
else:
v = getattr(self, name)
if isinstance(v, basestring) and obj.prefix:
if v.startswith(obj.prefix):
v = v.replace(obj.prefix, '', 1)
if isinstance(v, basestring) and obj.time_stamp:
v = dateutil.string_to_timestamp(v)
d[name] = v
return d
