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import io
from wsgiref.validate import InputWrapper
import pytest
import falcon
import falcon.request
from falcon.stream import BoundedStream
import falcon.testing as testing
SIZE_1_KB = 1024
@pytest.fixture
def resource():
return testing.SimpleTestResource()
@pytest.fixture
def client():
app = falcon.App()
return testing.TestClient(app)
class TestRequestBody:
def _get_wrapped_stream(self, req):
# Getting wrapped wsgi.input:
stream = req.stream
if isinstance(stream, BoundedStream):
stream = stream.stream
if isinstance(stream, InputWrapper):
stream = stream.input
return stream
def test_empty_body(self, client, resource):
client.app.add_route('/', resource)
client.simulate_request(path='/', body='')
stream = self._get_wrapped_stream(resource.captured_req)
assert stream.tell() == 0
def test_tiny_body(self, client, resource):
client.app.add_route('/', resource)
expected_body = '.'
client.simulate_request(path='/', body=expected_body)
stream = self._get_wrapped_stream(resource.captured_req)
actual_body = stream.read(1)
assert actual_body == expected_body.encode('utf-8')
assert stream.tell() == 1
def test_tiny_body_overflow(self, client, resource):
client.app.add_route('/', resource)
expected_body = '.'
client.simulate_request(path='/', body=expected_body)
stream = self._get_wrapped_stream(resource.captured_req)
# Read too many bytes; shouldn't block
actual_body = stream.read(len(expected_body) + 1)
assert actual_body == expected_body.encode('utf-8')
def test_read_body(self, client, resource):
client.app.add_route('/', resource)
expected_body = testing.rand_string(SIZE_1_KB // 2, SIZE_1_KB)
expected_len = len(expected_body)
headers = {'Content-Length': str(expected_len)}
client.simulate_request(path='/', body=expected_body, headers=headers)
content_len = resource.captured_req.get_header('content-length')
assert content_len == str(expected_len)
stream = self._get_wrapped_stream(resource.captured_req)
actual_body = stream.read()
assert actual_body == expected_body.encode('utf-8')
stream.seek(0, 2)
assert stream.tell() == expected_len
assert stream.tell() == expected_len
def test_bounded_stream_property_empty_body(self):
"""Test that we can get a bounded stream outside of wsgiref."""
environ = testing.create_environ()
req = falcon.Request(environ)
bounded_stream = req.bounded_stream
# NOTE(kgriffs): Verify that we aren't creating a new object
# each time the property is called. Also ensures branch
# coverage of the property implementation.
assert bounded_stream is req.bounded_stream
data = bounded_stream.read()
assert len(data) == 0
def test_body_stream_wrapper(self):
data = testing.rand_string(SIZE_1_KB // 2, SIZE_1_KB)
expected_body = data.encode('utf-8')
expected_len = len(expected_body)
# NOTE(kgriffs): Append newline char to each line
# to match readlines behavior
expected_lines = [(line + '\n').encode('utf-8') for line in data.split('\n')]
# NOTE(kgriffs): Remove trailing newline to simulate
# what readlines does
expected_lines[-1] = expected_lines[-1][:-1]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.read() == expected_body
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.read(2) == expected_body[0:2]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.read(expected_len + 1) == expected_body
# NOTE(kgriffs): Test that reading past the end does not
# hang, but returns the empty string.
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
for i in range(expected_len + 1):
expected_value = expected_body[i : i + 1] if i < expected_len else b''
assert body.read(1) == expected_value
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readline() == expected_lines[0]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readline(-1) == expected_lines[0]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readline(expected_len + 1) == expected_lines[0]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readlines() == expected_lines
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readlines(-1) == expected_lines
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert body.readlines(expected_len + 1) == expected_lines
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
assert next(body) == expected_lines[0]
stream = io.BytesIO(expected_body)
body = BoundedStream(stream, expected_len)
for i, line in enumerate(body):
assert line == expected_lines[i]
def test_request_repr(self):
environ = testing.create_environ()
req = falcon.Request(environ)
_repr = '<%s: %s %r>' % (req.__class__.__name__, req.method, req.url)
assert req.__repr__() == _repr
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