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Regression in parsing empty headers #3218

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merged 4 commits into from
Aug 28, 2018
Merged

Regression in parsing empty headers #3218

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3e12a2c
Add a empty header value parsing test (failing test)
popravich Aug 27, 2018
3bd5206
fix empty header value parsing
popravich Aug 27, 2018
0f1520b
add one more related issue to CHANGES
popravich Aug 27, 2018
3c98df8
drop duplicate news fragment
popravich Aug 28, 2018
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1 change: 1 addition & 0 deletions CHANGES/3218.bugfix
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix empty header parsing regression.
6 changes: 5 additions & 1 deletion aiohttp/_http_parser.pyx
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Expand Up @@ -260,6 +260,7 @@ cdef class HttpParser:

bytearray _raw_name
bytearray _raw_value
bint _has_value

object _protocol
object _loop
Expand Down Expand Up @@ -327,6 +328,7 @@ cdef class HttpParser:

self._raw_name = bytearray()
self._raw_value = bytearray()
self._has_value = False

self._max_line_size = max_line_size
self._max_headers = max_headers
Expand Down Expand Up @@ -364,12 +366,13 @@ cdef class HttpParser:

PyByteArray_Resize(self._raw_name, 0)
PyByteArray_Resize(self._raw_value, 0)
self._has_value = False
self._raw_headers.append((raw_name, raw_value))

cdef _on_header_field(self, char* at, size_t length):
cdef Py_ssize_t size
cdef char *buf
if self._raw_value:
if self._has_value:
self._process_header()

size = PyByteArray_Size(self._raw_name)
Expand All @@ -385,6 +388,7 @@ cdef class HttpParser:
PyByteArray_Resize(self._raw_value, size + length)
buf = PyByteArray_AsString(self._raw_value)
memcpy(buf + size, at, length)
self._has_value = True

cdef _on_headers_complete(self):
self._process_header()
Expand Down
20 changes: 20 additions & 0 deletions tests/test_client_functional.py
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Expand Up @@ -495,6 +495,26 @@ async def handler(request):
resp.close()


async def test_empty_header_values(aiohttp_client):
async def handler(request):
resp = web.Response()
resp.headers['X-Empty'] = ''
return resp

app = web.Application()
app.router.add_route('GET', '/', handler)
client = await aiohttp_client(app)
resp = await client.get('/')
assert resp.status == 200
raw_headers = tuple((bytes(h), bytes(v)) for h, v in resp.raw_headers)
assert raw_headers == ((b'X-Empty', b''),
(b'Content-Length', b'0'),
(b'Content-Type', b'application/octet-stream'),
(b'Date', mock.ANY),
(b'Server', mock.ANY))
resp.close()


async def test_204_with_gzipped_content_encoding(aiohttp_client):
async def handler(request):
resp = web.StreamResponse(status=204)
Expand Down