def test_streaming_response(self):
r = StreamingHttpResponse(iter(['hello', 'world']))
# iterating over the response itself yields bytestring chunks.
chunks = list(r)
self.assertEqual(chunks, [b'hello', b'world'])
for chunk in chunks:
self.assertIsInstance(chunk, six.binary_type)
# and the response can only be iterated once.
self.assertEqual(list(r), [])
# even when a sequence that can be iterated many times, like a list,
# is given as content.
r = StreamingHttpResponse(['abc', 'def'])
self.assertEqual(list(r), [b'abc', b'def'])
self.assertEqual(list(r), [])
# streaming responses don't have a `content` attribute.
self.assertFalse(hasattr(r, 'content'))
# and you can't accidentally assign to a `content` attribute.
with self.assertRaises(AttributeError):
r.content = 'xyz'
# but they do have a `streaming_content` attribute.
self.assertTrue(hasattr(r, 'streaming_content'))
# that exists so we can check if a response is streaming, and wrap or
# replace the content iterator.
r.streaming_content = iter(['abc', 'def'])
r.streaming_content = (chunk.upper() for chunk in r.streaming_content)
self.assertEqual(list(r), [b'ABC', b'DEF'])
# coercing a streaming response to bytes doesn't return a complete HTTP
# message like a regular response does. it only gives us the headers.
r = StreamingHttpResponse(iter(['hello', 'world']))
self.assertEqual(
six.binary_type(r), b'Content-Type: text/html; charset=utf-8')
# and this won't consume its content.
self.assertEqual(list(r), [b'hello', b'world'])
# additional content cannot be written to the response.
r = StreamingHttpResponse(iter(['hello', 'world']))
with self.assertRaises(Exception):
r.write('!')
# and we can't tell the current position.
with self.assertRaises(Exception):
r.tell()
r = StreamingHttpResponse(iter(['hello', 'world']))
self.assertEqual(r.getvalue(), b'helloworld')
def test_streaming_response(self):
r = StreamingHttpResponse(iter(["hello", "world"]))
# iterating over the response itself yields bytestring chunks.
chunks = list(r)
self.assertEqual(chunks, [b"hello", b"world"])
for chunk in chunks:
self.assertIsInstance(chunk, six.binary_type)
# and the response can only be iterated once.
self.assertEqual(list(r), [])
# even when a sequence that can be iterated many times, like a list,
# is given as content.
r = StreamingHttpResponse(["abc", "def"])
self.assertEqual(list(r), [b"abc", b"def"])
self.assertEqual(list(r), [])
# iterating over Unicode strings still yields bytestring chunks.
r.streaming_content = iter(["hello", "café"])
chunks = list(r)
# '\xc3\xa9' == unichr(233).encode('utf-8')
self.assertEqual(chunks, [b"hello", b"caf\xc3\xa9"])
for chunk in chunks:
self.assertIsInstance(chunk, six.binary_type)
# streaming responses don't have a `content` attribute.
self.assertFalse(hasattr(r, "content"))
# and you can't accidentally assign to a `content` attribute.
with self.assertRaises(AttributeError):
r.content = "xyz"
# but they do have a `streaming_content` attribute.
self.assertTrue(hasattr(r, "streaming_content"))
# that exists so we can check if a response is streaming, and wrap or
# replace the content iterator.
r.streaming_content = iter(["abc", "def"])
r.streaming_content = (chunk.upper() for chunk in r.streaming_content)
self.assertEqual(list(r), [b"ABC", b"DEF"])
# coercing a streaming response to bytes doesn't return a complete HTTP
# message like a regular response does. it only gives us the headers.
r = StreamingHttpResponse(iter(["hello", "world"]))
self.assertEqual(six.binary_type(r), b"Content-Type: text/html; charset=utf-8")
# and this won't consume its content.
self.assertEqual(list(r), [b"hello", b"world"])
# additional content cannot be written to the response.
r = StreamingHttpResponse(iter(["hello", "world"]))
with self.assertRaises(Exception):
r.write("!")
# and we can't tell the current position.
with self.assertRaises(Exception):
r.tell()
r = StreamingHttpResponse(iter(["hello", "world"]))
self.assertEqual(r.getvalue(), b"helloworld")
def test_streaming_response(self):
r = StreamingHttpResponse(iter(["hello", "world"]))
# iterating over the response itself yields bytestring chunks.
chunks = list(r)
self.assertEqual(chunks, [b"hello", b"world"])
for chunk in chunks:
self.assertIsInstance(chunk, bytes)
# and the response can only be iterated once.
self.assertEqual(list(r), [])
# even when a sequence that can be iterated many times, like a list,
# is given as content.
r = StreamingHttpResponse(["abc", "def"])
self.assertEqual(list(r), [b"abc", b"def"])
self.assertEqual(list(r), [])
# iterating over strings still yields bytestring chunks.
r.streaming_content = iter(["hello", "café"])
chunks = list(r)
# '\xc3\xa9' == unichr(233).encode()
self.assertEqual(chunks, [b"hello", b"caf\xc3\xa9"])
for chunk in chunks:
self.assertIsInstance(chunk, bytes)
# streaming responses don't have a `content` attribute.
self.assertFalse(hasattr(r, "content"))
# and you can't accidentally assign to a `content` attribute.
with self.assertRaises(AttributeError):
r.content = "xyz"
# but they do have a `streaming_content` attribute.
self.assertTrue(hasattr(r, "streaming_content"))
# that exists so we can check if a response is streaming, and wrap or
# replace the content iterator.
r.streaming_content = iter(["abc", "def"])
r.streaming_content = (chunk.upper() for chunk in r.streaming_content)
self.assertEqual(list(r), [b"ABC", b"DEF"])
# coercing a streaming response to bytes doesn't return a complete HTTP
# message like a regular response does. it only gives us the headers.
r = StreamingHttpResponse(iter(["hello", "world"]))
self.assertEqual(bytes(r), b"Content-Type: text/html; charset=utf-8")
# and this won't consume its content.
self.assertEqual(list(r), [b"hello", b"world"])
# additional content cannot be written to the response.
r = StreamingHttpResponse(iter(["hello", "world"]))
with self.assertRaises(Exception):
r.write("!")
# and we can't tell the current position.
with self.assertRaises(Exception):
r.tell()
r = StreamingHttpResponse(iter(["hello", "world"]))
self.assertEqual(r.getvalue(), b"helloworld")