async def fetch(self, url, method='GET', headers=None, body=None):
"""Perform a HTTP request and return decoded JSON data"""
request_headers = self.prepare_request_headers(headers)
url = self.proxy + url
if self.verbose:
print("\nRequest:", method, url, headers, body)
self.logger.debug("%s %s, Request: %s %s", method, url, headers, body)
request_body = body
encoded_body = body.encode() if body else None
self.open()
session_method = getattr(self.session, method.lower())
http_response = None
http_status_code = None
http_status_text = None
json_response = None
try:
async with session_method(yarl.URL(url, encoded=True),
data=encoded_body,
headers=request_headers,
timeout=(self.timeout / 1000),
proxy=self.aiohttp_proxy) as response:
http_response = await response.text()
http_status_code = response.status
http_status_text = response.reason
json_response = self.parse_json(http_response)
headers = response.headers
if self.enableLastHttpResponse:
self.last_http_response = http_response
if self.enableLastResponseHeaders:
self.last_response_headers = headers
if self.enableLastJsonResponse:
self.last_json_response = json_response
if self.verbose:
print("\nResponse:", method, url, http_status_code,
headers, http_response)
self.logger.debug("%s %s, Response: %s %s %s", method, url,
http_status_code, headers, http_response)
except socket.gaierror as e:
raise ExchangeNotAvailable(method + ' ' + url)
except concurrent.futures._base.TimeoutError as e:
raise RequestTimeout(method + ' ' + url)
except aiohttp.client_exceptions.ClientConnectionError as e:
raise ExchangeNotAvailable(method + ' ' + url)
except aiohttp.client_exceptions.ClientError as e: # base exception class
raise ExchangeError(method + ' ' + url)
self.handle_errors(http_status_code, http_status_text, url, method,
headers, http_response, json_response,
request_headers, request_body)
self.handle_rest_errors(http_status_code, http_status_text,
http_response, url, method)
self.handle_rest_response(http_response, json_response, url, method)
if json_response is not None:
return json_response
if self.is_text_response(headers):
return http_response
return response.content
async def fetch(self, url, method='GET', headers=None, body=None):
"""Perform a HTTP request and return decoded JSON data"""
request_headers = self.prepare_request_headers(headers)
url = self.proxy + url
if self.verbose:
self.print("\nRequest:", method, url, headers, body)
self.logger.debug("%s %s, Request: %s %s", method, url, headers, body)
request_body = body
encoded_body = body.encode() if body else None
self.open()
session_method = getattr(self.session, method.lower())
http_response = None
http_status_code = None
http_status_text = None
json_response = None
try:
async with session_method(yarl.URL(url, encoded=True),
data=encoded_body,
headers=request_headers,
timeout=(self.timeout / 1000),
proxy=self.aiohttp_proxy) as response:
http_response = await response.text()
# CIMultiDictProxy
raw_headers = response.headers
headers = {}
for header in raw_headers:
if header in headers:
headers[header] = headers[header] + ', ' + raw_headers[
header]
else:
headers[header] = raw_headers[header]
http_status_code = response.status
http_status_text = response.reason
http_response = self.on_rest_response(
http_status_code, http_status_text, url, method, headers,
http_response, request_headers, request_body)
json_response = self.parse_json(http_response)
if self.enableLastHttpResponse:
self.last_http_response = http_response
if self.enableLastResponseHeaders:
self.last_response_headers = headers
if self.enableLastJsonResponse:
self.last_json_response = json_response
if self.verbose:
self.print("\nResponse:", method, url, http_status_code,
headers, http_response)
self.logger.debug("%s %s, Response: %s %s %s", method, url,
http_status_code, headers, http_response)
except socket.gaierror as e:
details = ' '.join([self.id, method, url])
raise ExchangeNotAvailable(details) from e
except (concurrent.futures.TimeoutError, asyncio.TimeoutError) as e:
details = ' '.join([self.id, method, url])
raise RequestTimeout(details) from e
except aiohttp.ClientConnectionError as e:
details = ' '.join([self.id, method, url])
raise ExchangeNotAvailable(details) from e
except aiohttp.ClientError as e: # base exception class
details = ' '.join([self.id, method, url])
raise ExchangeError(details) from e
self.handle_errors(http_status_code, http_status_text, url, method,
headers, http_response, json_response,
request_headers, request_body)
self.handle_http_status_code(http_status_code, http_status_text, url,
method, http_response)
if json_response is not None:
return json_response
if self.is_text_response(headers):
return http_response
return response.content
def handle_errors(self, httpCode, reason, url, method, headers, body):
if not isinstance(body, basestring):
return # fallback to default error handler
if len(body) < 2:
return # fallback to default error handler
if (body[0] == '{') or (body[0] == '['):
response = json.loads(body)
if 'success' in response:
#
# 1 - Liqui only returns the integer 'success' key from their private API
#
# {"success": 1, ...} httpCode == 200
# {"success": 0, ...} httpCode == 200
#
# 2 - However, exchanges derived from Liqui, can return non-integers
#
# It can be a numeric string
# {"sucesss": "1", ...}
# {"sucesss": "0", ...}, httpCode >= 200(can be 403, 502, etc)
#
# Or just a string
# {"success": "true", ...}
# {"success": "false", ...}, httpCode >= 200
#
# Or a boolean
# {"success": True, ...}
# {"success": False, ...}, httpCode >= 200
#
# 3 - Oversimplified, Python PEP8 forbids comparison operator(==) of different types
#
# 4 - We do not want to copy-paste and duplicate the code of self handler to other exchanges derived from Liqui
#
# To cover points 1, 2, 3 and 4 combined self handler should work like self:
#
success = self.safe_value(response, 'success', False)
if isinstance(success, basestring):
if (success == 'true') or (success == '1'):
success = True
else:
success = False
if not success:
code = self.safe_string(response, 'code')
message = self.safe_string(response, 'error')
feedback = self.id + ' ' + self.json(response)
exceptions = self.exceptions
if code in exceptions:
raise exceptions[code](feedback)
# need a second error map for these messages, apparently...
# in fact, we can use the same .exceptions with string-keys to save some loc here
if message == 'invalid api key':
raise AuthenticationError(feedback)
elif message == 'invalid sign':
raise AuthenticationError(feedback)
elif message == 'api key dont have trade permission':
raise AuthenticationError(feedback)
elif message.find(
'invalid parameter'
) >= 0: # errorCode 0, returned on buy(symbol, 0, 0)
raise InvalidOrder(feedback)
elif message == 'invalid order':
raise InvalidOrder(feedback)
elif message == 'Requests too often':
raise DDoSProtection(feedback)
elif message == 'not available':
raise ExchangeNotAvailable(feedback)
elif message == 'data unavailable':
raise ExchangeNotAvailable(feedback)
elif message == 'external service unavailable':
raise ExchangeNotAvailable(feedback)
else:
raise ExchangeError(self.id +
' unknown "error" value: ' +
self.json(response))
def handle_errors(self, code, reason, url, method, headers, body):
if (code == 418) or (code == 429):
raise DDoSProtection(self.id + ' ' + str(code) + ' ' + reason +
' ' + body)
# error response in a form: {"code": -1013, "msg": "Invalid quantity."}
# following block cointains legacy checks against message patterns in "msg" property
# will switch "code" checks eventually, when we know all of them
if code >= 400:
if body.find('Price * QTY is zero or less') >= 0:
raise InvalidOrder(
self.id + ' order cost = amount * price is zero or less ' +
body)
if body.find('LOT_SIZE') >= 0:
raise InvalidOrder(
self.id +
' order amount should be evenly divisible by lot size ' +
body)
if body.find('PRICE_FILTER') >= 0:
raise InvalidOrder(
self.id +
' order price is invalid, i.e. exceeds allowed price precision, exceeds min price or max price limits or is invalid float value in general, use self.price_to_precision(symbol, amount) '
+ body)
if len(body) > 0:
if body[0] == '{':
response = json.loads(body)
# check success value for wapi endpoints
# response in format {'msg': 'The coin does not exist.', 'success': True/false}
success = self.safe_value(response, 'success', True)
if not success:
message = self.safe_string(response, 'msg')
parsedMessage = None
if message is not None:
try:
parsedMessage = json.loads(message)
except Exception as e:
# do nothing
parsedMessage = None
if parsedMessage is not None:
response = parsedMessage
# checks against error codes
error = self.safe_string(response, 'code')
if error is not None:
exceptions = self.exceptions
if error in exceptions:
# a workaround for {"code":-2015,"msg":"Invalid API-key, IP, or permissions for action."}
# despite that their message is very confusing, it is raised by Binance
# on a temporary ban(the API key is valid, but disabled for a while)
if (error == '-2015') and self.options[
'hasAlreadyAuthenticatedSuccessfully']:
raise DDoSProtection(self.id +
' temporary banned: ' + body)
message = self.safe_string(response, 'msg')
if message == 'Order would trigger immediately.':
raise InvalidOrder(self.id + ' ' + body)
elif message == 'Account has insufficient balance for requested action.':
raise InsufficientFunds(self.id + ' ' + body)
elif message == 'Rest API trading is not enabled.':
raise ExchangeNotAvailable(self.id + ' ' + body)
raise exceptions[error](self.id + ' ' + body)
else:
raise ExchangeError(self.id + ' ' + body)
if not success:
raise ExchangeError(self.id + ' ' + body)
def handle_errors(self,
code,
reason,
url,
method,
headers,
body,
response=None):
if body[0] == '{':
response = json.loads(body)
# {success: False, message: "message"}
success = self.safe_value(response, 'success')
if success is None:
raise ExchangeError(self.id + ': malformed response: ' +
self.json(response))
if isinstance(success, basestring):
# bleutrade uses string instead of boolean
success = True if (success == 'true') else False
if not success:
message = self.safe_string(response, 'message')
feedback = self.id + ' ' + self.json(response)
exceptions = self.exceptions
if message == 'APIKEY_INVALID':
if self.options['hasAlreadyAuthenticatedSuccessfully']:
raise DDoSProtection(feedback)
else:
raise AuthenticationError(feedback)
if message == 'DUST_TRADE_DISALLOWED_MIN_VALUE_50K_SAT':
raise InvalidOrder(
self.id + ' order cost should be over 50k satoshi ' +
self.json(response))
if message == 'INVALID_ORDER':
# Bittrex will return an ambiguous INVALID_ORDER message
# upon canceling already-canceled and closed orders
# therefore self special case for cancelOrder
# url = 'https://bittrex.com/api/v1.1/market/cancel?apikey=API_KEY&uuid=ORDER_UUID'
cancel = 'cancel'
indexOfCancel = url.find(cancel)
if indexOfCancel >= 0:
parts = url.split('&')
orderId = None
for i in range(0, len(parts)):
part = parts[i]
keyValue = part.split('=')
if keyValue[0] == 'uuid':
orderId = keyValue[1]
break
if orderId is not None:
raise OrderNotFound(self.id + ' cancelOrder ' +
orderId + ' ' +
self.json(response))
else:
raise OrderNotFound(self.id + ' cancelOrder ' +
self.json(response))
if message in exceptions:
raise exceptions[message](feedback)
if message is not None:
if message.find('throttled. Try again') >= 0:
raise DDoSProtection(feedback)
if message.find('problem') >= 0:
raise ExchangeNotAvailable(
feedback
) # 'There was a problem processing your request. If self problem persists, please contact...')
raise ExchangeError(feedback)
