def test_double_iteration_over_same_response_body(self):
class TestHttpResp(object):
msg = {'transfer-encoding': 'chunked'}
def __init__(self, fp):
self.fp = fp
def close(self):
pass
def isclosed(self):
return len(self.fp.getvalue()) == self.fp.tell()
data = b'foobarbaz'
data = b'\n'.join([hex(len(data))[2:].encode('utf-8'), data])
response = http.ResponseBody(TestHttpResp(util.StringIO(data)), None,
None, None)
self.assertEqual(list(response.iterchunks()), [b'foobarbaz'])
self.assertEqual(list(response.iterchunks()), [])
def test_attachment_crud_with_files(self):
doc = {'bar': 42}
self.db['foo'] = doc
old_rev = doc['_rev']
fileobj = util.StringIO(b'Foo bar baz')
self.db.put_attachment(doc, fileobj, 'foo.txt')
self.assertNotEqual(old_rev, doc['_rev'])
doc = self.db['foo']
attachment = doc['_attachments']['foo.txt']
self.assertEqual(len('Foo bar baz'), attachment['length'])
self.assertEqual('text/plain', attachment['content_type'])
self.assertEqual(b'Foo bar baz',
self.db.get_attachment(doc, 'foo.txt').read())
self.assertEqual(b'Foo bar baz',
self.db.get_attachment('foo', 'foo.txt').read())
old_rev = doc['_rev']
self.db.delete_attachment(doc, 'foo.txt')
self.assertNotEqual(old_rev, doc['_rev'])
self.assertEqual(None, self.db['foo'].get('_attachments'))
def request(self,
method,
url,
body=None,
headers=None,
credentials=None,
num_redirects=0):
if url in self.perm_redirects:
url = self.perm_redirects[url]
method = method.upper()
if headers is None:
headers = {}
headers.setdefault('Accept', 'application/json')
headers['User-Agent'] = self.user_agent
cached_resp = None
if method in ('GET', 'HEAD'):
cached_resp = self.cache.get(url)
if cached_resp is not None:
etag = cached_resp[1].get('etag')
if etag:
headers['If-None-Match'] = etag
if (body is not None and not isinstance(body, util.strbase)
and not hasattr(body, 'read')):
body = json.encode(body).encode('utf-8')
headers.setdefault('Content-Type', 'application/json')
if body is None:
headers.setdefault('Content-Length', '0')
elif isinstance(body, util.strbase):
headers.setdefault('Content-Length', str(len(body)))
else:
headers['Transfer-Encoding'] = 'chunked'
authorization = basic_auth(credentials)
if authorization:
headers['Authorization'] = authorization
path_query = util.urlunsplit(('', '') + util.urlsplit(url)[2:4] +
('', ))
conn = self.connection_pool.get(url)
def _try_request_with_retries(retries):
while True:
try:
return _try_request()
except socket.error as e:
ecode = e.args[0]
if ecode not in self.retryable_errors:
raise
try:
delay = next(retries)
except StopIteration:
# No more retries, raise last socket error.
raise e
finally:
time.sleep(delay)
conn.close()
def _try_request():
try:
conn.putrequest(method, path_query, skip_accept_encoding=True)
for header in headers:
conn.putheader(header, headers[header])
if body is None:
conn.endheaders()
else:
if isinstance(body, util.strbase):
if isinstance(body, util.utype):
conn.endheaders(body.encode('utf-8'))
else:
conn.endheaders(body)
else: # assume a file-like object and send in chunks
conn.endheaders()
while 1:
chunk = body.read(CHUNK_SIZE)
if not chunk:
break
if isinstance(chunk, util.utype):
chunk = chunk.encode('utf-8')
status = ('%x\r\n' % len(chunk)).encode('utf-8')
conn.send(status + chunk + b'\r\n')
conn.send(b'0\r\n\r\n')
return conn.getresponse()
except BadStatusLine as e:
# httplib raises a BadStatusLine when it cannot read the status
# line saying, "Presumably, the server closed the connection
# before sending a valid response."
# Raise as ECONNRESET to simplify retry logic.
if e.line == '' or e.line == "''":
raise socket.error(errno.ECONNRESET)
else:
raise
resp = _try_request_with_retries(iter(self.retry_delays))
status = resp.status
# Handle conditional response
if status == 304 and method in ('GET', 'HEAD'):
resp.read()
self.connection_pool.release(url, conn)
status, msg, data = cached_resp
if data is not None:
data = util.StringIO(data)
return status, msg, data
elif cached_resp:
self.cache.remove(url)
# Handle redirects
if status == 303 or \
method in ('GET', 'HEAD') and status in (301, 302, 307):
resp.read()
self.connection_pool.release(url, conn)
if num_redirects > self.max_redirects:
raise RedirectLimit('Redirection limit exceeded')
location = resp.getheader('location')
if status == 301:
self.perm_redirects[url] = location
elif status == 303:
method = 'GET'
return self.request(method,
location,
body,
headers,
num_redirects=num_redirects + 1)
data = None
streamed = False
# Read the full response for empty responses so that the connection is
# in good state for the next request
if method == 'HEAD' or resp.getheader('content-length') == '0' or \
status < 200 or status in (204, 304):
resp.read()
self.connection_pool.release(url, conn)
# Buffer small non-JSON response bodies
elif int(resp.getheader('content-length', sys.maxsize)) < CHUNK_SIZE:
data = resp.read()
self.connection_pool.release(url, conn)
# For large or chunked response bodies, do not buffer the full body,
# and instead return a minimal file-like object
else:
data = ResponseBody(resp, self.connection_pool, url, conn)
streamed = True
# Handle errors
if status >= 400:
ctype = resp.getheader('content-type')
if data is not None and 'application/json' in ctype:
data = json.decode(data.decode('utf-8'))
error = data.get('error'), data.get('reason')
elif method != 'HEAD':
error = resp.read()
self.connection_pool.release(url, conn)
else:
error = ''
if status == 401:
raise Unauthorized(error)
elif status == 404:
raise ResourceNotFound(error)
elif status == 409:
raise ResourceConflict(error)
elif status == 412:
raise PreconditionFailed(error)
else:
raise ServerError((status, error))
# Store cachable responses
if not streamed and method == 'GET' and 'etag' in resp.msg:
self.cache.put(url, (status, resp.msg, data))
if not streamed and data is not None:
data = util.StringIO(data)
return status, resp.msg, data
