pincer.core.http.HTTPClient.__aexit__() - Code Metrics - Inspection of "Merge pull request #18 from Maneren/main" - Pincer-org/Pincer - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — main ( 95e4d4...e97ed6 )

by Yohann

created 2021-09-01 14:27 UTC

pincer.core.http.HTTPClient.aexit() A

↳ Parent: pincer.core.http

Complexity

Conditions

Size

Total Lines	2
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	2
dl	0
loc	2
rs	10
c	0
b	0
f	0
cc	1
nop	4

# -*- coding: utf-8 -*-

# MIT License
#
# Copyright (c) 2021 Pincer
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import asyncio
import logging
from json import dumps
from typing import Dict, Any, Optional, Protocol

from aiohttp import ClientSession, ClientResponse
from aiohttp.client import _RequestContextManager
from aiohttp.typedefs import StrOrURL

from pincer import __package__

from pincer.exceptions import (
    NotFoundError, BadRequestError, NotModifiedError, UnauthorizedError,
    ForbiddenError, MethodNotAllowedError, RateLimitError, ServerError,
    HTTPError
)

_log = logging.getLogger(__package__)

class HttpCallable(Protocol):
    """aiohttp HTTP method"""

    def __call__(
            self, url: StrOrURL, *,
            allow_redirects: bool = True, json: Dict = None, **kwargs: Any
    ) -> _RequestContextManager:
        pass


class HTTPClient:
    """Interacts with Discord API through HTTP protocol"""

    def __init__(self, token: str, *, version: int, ttl: int = 5):
        """
        Instantiate a new HttpApi object.

        :param token:
            Discord API token

        Keyword Arguments:

        :param version:
            The discord API version.
            See `developers/docs/reference#api-versioning`.

        :param ttl:
            Max amount of attempts after error code 5xx
        """
        self.url: str = f"https://discord.com/api/v{version}"
        self.max_ttl: int = ttl

        headers: Dict[str, str] = {
            "Authorization": f"Bot {token}"
        }
        self.__session = ClientSession(headers=headers)

        self.__http_exceptions: Dict[int, HTTPError] = {
            304: NotModifiedError(),
            400: BadRequestError(),
            401: UnauthorizedError(),
            403: ForbiddenError(),
            404: NotFoundError(),
            405: MethodNotAllowedError(),
            429: RateLimitError()
        }

    # for with block
    async def __aenter__(self):
        return self

    async def __aexit__(self, exc_type, exc, tb):

        await self.__session.close()

    async def __send(
            self, method: HttpCallable, endpoint: str, *,
            data: Optional[Dict] = None, __ttl: int = None
    ) -> Optional[Dict]:
        """
        Send an api request to the Discord REST API.

        :param method: The method for the request. (eg GET or POST)
        :param endpoint: The endpoint to which the request will be sent.
        :param __ttl: Private param used for recursively setting the
        retry amount. (Eg set to 1 for 1 max retry)
        :param data: The data which will be added to the request.
        """
        ttl = __ttl or self.max_ttl

        if ttl == 0:
            logging.error(

                # TODO: print better method name

                f"{method.__name__.upper()} {endpoint} has reached the "
                f"maximum retry count of {self.max_ttl}."
            )

            raise ServerError(f"Maximum amount of retries for `{endpoint}`.")

        # TODO: print better method name

        _log.debug(f"{method.__name__.upper()} {endpoint} | {dumps(data)}")


        url = f"{self.url}/{endpoint}"
        async with method(url, json=data) as res:
            return await self.__handle_response(
                res, method, endpoint, ttl, data
            )

    async def __handle_response(
            self,
            res: ClientResponse,
            method: HttpCallable,
            endpoint: str,
            __ttl: int,
            data: Optional[Dict],
    ):
        """Handle responses from the discord API."""
        if res.ok:

            if res.status == 204:
                _log.debug(
                    "Request has been sent successfully. "
                )
                return

            _log.debug(
                "Request has been sent successfully. "
                "Returning json response."
            )

            return await res.json()

        exception = self.__http_exceptions.get(res.status)

        if exception:
            _log.error(

                f"An http exception occurred while trying to send "
                f"a request to {endpoint}. ({res.status}, {res.reason})"
            )

            exception.__init__(res.reason)
            raise exception

        # status code is guaranteed to be 5xx
        retry_in = 1 + (self.max_ttl - __ttl) * 2

        _log.debug(

            "Server side error occurred with status code "
            f"{res.status}. Retrying in {retry_in}s."
        )

        await asyncio.sleep(retry_in)

        # try sending it again
        return await self.__send(method, endpoint, __ttl=__ttl - 1, data=data)

    async def delete(self, route: str) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.delete, route)

    async def get(self, route: str) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.get, route)

    async def head(self, route: str) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.head, route)

    async def options(self, route: str) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.options, route)

    async def patch(self, route: str, data: Dict) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.patch, route, data=data)

    async def post(self, route: str, data: Dict) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.post, route, data=data)

    async def put(self, route: str, data: Dict) -> Optional[Dict]:
        """
        :return: JSON response from the discord API.
        """
        return await self.__send(self.__session.put, route, data=data)


1			# -- coding: utf-8 --
			0 ignored issues – show introduced 2021-08-30 06:38 UTC by Report Bug Copy Issue Report Missing module docstring Loading history...
2			# MIT License
3			#
4			# Copyright (c) 2021 Pincer
5			#
6			# Permission is hereby granted, free of charge, to any person obtaining
7			# a copy of this software and associated documentation files
8			# (the "Software"), to deal in the Software without restriction,
9			# including without limitation the rights to use, copy, modify, merge,
10			# publish, distribute, sublicense, and/or sell copies of the Software,
11			# and to permit persons to whom the Software is furnished to do so,
12			# subject to the following conditions:
13			#
14			# The above copyright notice and this permission notice shall be
15			# included in all copies or substantial portions of the Software.
16			#
17			# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18			# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19			# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20			# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21			# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22			# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23			# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24
25			import asyncio
26			import logging
27			from json import dumps
28			from typing import Dict, Any, Optional, Protocol
29
30			from aiohttp import ClientSession, ClientResponse
31			from aiohttp.client import _RequestContextManager
32			from aiohttp.typedefs import StrOrURL
33
34			from pincer import __package__
			1 ignored issue – show Bug Best Practice introduced 2021-08-31 17:23 UTC by Report Bug Copy Issue Report This seems to re-define the built-in `__package__`. It is generally discouraged to redefine built-ins as this makes code very hard to read. Loading history...
35			from pincer.exceptions import (
36			NotFoundError, BadRequestError, NotModifiedError, UnauthorizedError,
37			ForbiddenError, MethodNotAllowedError, RateLimitError, ServerError,
38			HTTPError
39			)
40
41			_log = logging.getLogger(__package__)
42
43			class HttpCallable(Protocol):
44			"""aiohttp HTTP method"""
45
46			def __call__(
47			self, url: StrOrURL, *,
48			allow_redirects: bool = True, json: Dict = None, **kwargs: Any
49			) -> _RequestContextManager:
50			pass
51
52
53			class HTTPClient:
54			"""Interacts with Discord API through HTTP protocol"""
55
56			def __init__(self, token: str, *, version: int, ttl: int = 5):
57			"""
58			Instantiate a new HttpApi object.
59
60			:param token:
61			Discord API token
62
63			Keyword Arguments:
64
65			:param version:
66			The discord API version.
67			See `developers/docs/reference#api-versioning`.
68
69			:param ttl:
70			Max amount of attempts after error code 5xx
71			"""
72			self.url: str = f"https://discord.com/api/v{version}"
73			self.max_ttl: int = ttl
74
75			headers: Dict[str, str] = {
76			"Authorization": f"Bot {token}"
77			}
78			self.__session = ClientSession(headers=headers)
79
80			self.__http_exceptions: Dict[int, HTTPError] = {
81			304: NotModifiedError(),
82			400: BadRequestError(),
83			401: UnauthorizedError(),
84			403: ForbiddenError(),
85			404: NotFoundError(),
86			405: MethodNotAllowedError(),
87			429: RateLimitError()
88			}
89
90			# for with block
91			async def __aenter__(self):
92			return self
93
94			async def __aexit__(self, exc_type, exc, tb):
			1 ignored issue – show Coding Style Naming introduced 2021-09-01 14:06 UTC by Report Bug Copy Issue Report Argument name "tb" doesn't conform to snake_case naming style ('([^\\W\\dA-Z][^\\WA-Z]2,\|_[^\\WA-Z]*\|__[^\\WA-Z\\d_][^\\WA-Z]+__)$' pattern) This check looks for invalid names for a range of different identifiers. You can set regular expressions to which the identifiers must conform if the defaults do not match your requirements. If your project includes a Pylint configuration file, the settings contained in that file take precedence. To find out more about Pylint, please refer to their site. Loading history...
95			await self.__session.close()
96
97			async def __send(
98			self, method: HttpCallable, endpoint: str, *,
99			data: Optional[Dict] = None, __ttl: int = None
100			) -> Optional[Dict]:
101			"""
102			Send an api request to the Discord REST API.
103
104			:param method: The method for the request. (eg GET or POST)
105			:param endpoint: The endpoint to which the request will be sent.
106			:param __ttl: Private param used for recursively setting the
107			retry amount. (Eg set to 1 for 1 max retry)
108			:param data: The data which will be added to the request.
109			"""
110			ttl = __ttl or self.max_ttl
111
112			if ttl == 0:
113			logging.error(
			0 ignored issues – show introduced 2021-08-31 06:28 UTC by Report Bug Copy Issue Report Use lazy % formatting in logging functions Loading history...
114			# TODO: print better method name
			0 ignored issues – show Coding Style introduced 2021-09-01 14:06 UTC by Report Bug Copy Issue Report `TODO` and `FIXME` comments should generally be avoided. Loading history...
115			f"{method.__name__.upper()} {endpoint} has reached the "
116			f"maximum retry count of {self.max_ttl}."
117			)
118
119			raise ServerError(f"Maximum amount of retries for `{endpoint}`.")
120
121			# TODO: print better method name
			0 ignored issues – show Coding Style introduced 2021-09-01 14:06 UTC by Report Bug Copy Issue Report `TODO` and `FIXME` comments should generally be avoided. Loading history...
122			_log.debug(f"{method.__name__.upper()} {endpoint} \| {dumps(data)}")
			0 ignored issues – show introduced 2021-08-31 06:28 UTC by Report Bug Copy Issue Report Use lazy % formatting in logging functions Loading history...
123
124			url = f"{self.url}/{endpoint}"
125			async with method(url, json=data) as res:
126			return await self.__handle_response(
127			res, method, endpoint, ttl, data
128			)
129
130			async def __handle_response(
131			self,
132			res: ClientResponse,
133			method: HttpCallable,
134			endpoint: str,
135			__ttl: int,
136			data: Optional[Dict],
137			):
138			"""Handle responses from the discord API."""
139			if res.ok:
140
141			if res.status == 204:
142			_log.debug(
143			"Request has been sent successfully. "
144			)
145			return
146
147			_log.debug(
148			"Request has been sent successfully. "
149			"Returning json response."
150			)
151
152			return await res.json()
153
154			exception = self.__http_exceptions.get(res.status)
155
156			if exception:
157			_log.error(
			0 ignored issues – show introduced 2021-08-31 17:23 UTC by Report Bug Copy Issue Report Use lazy % formatting in logging functions Loading history...
158			f"An http exception occurred while trying to send "
159			f"a request to {endpoint}. ({res.status}, {res.reason})"
160			)
161
162			exception.__init__(res.reason)
163			raise exception
164
165			# status code is guaranteed to be 5xx
166			retry_in = 1 + (self.max_ttl - __ttl) * 2
167
168			_log.debug(
			0 ignored issues – show introduced 2021-08-31 06:28 UTC by Report Bug Copy Issue Report Use lazy % formatting in logging functions Loading history...
169			"Server side error occurred with status code "
170			f"{res.status}. Retrying in {retry_in}s."
171			)
172
173			await asyncio.sleep(retry_in)
174
175			# try sending it again
176			return await self.__send(method, endpoint, __ttl=__ttl - 1, data=data)
177
178			async def delete(self, route: str) -> Optional[Dict]:
179			"""
180			:return: JSON response from the discord API.
181			"""
182			return await self.__send(self.__session.delete, route)
183
184			async def get(self, route: str) -> Optional[Dict]:
185			"""
186			:return: JSON response from the discord API.
187			"""
188			return await self.__send(self.__session.get, route)
189
190			async def head(self, route: str) -> Optional[Dict]:
191			"""
192			:return: JSON response from the discord API.
193			"""
194			return await self.__send(self.__session.head, route)
195
196			async def options(self, route: str) -> Optional[Dict]:
197			"""
198			:return: JSON response from the discord API.
199			"""
200			return await self.__send(self.__session.options, route)
201
202			async def patch(self, route: str, data: Dict) -> Optional[Dict]:
203			"""
204			:return: JSON response from the discord API.
205			"""
206			return await self.__send(self.__session.patch, route, data=data)
207
208			async def post(self, route: str, data: Dict) -> Optional[Dict]:
209			"""
210			:return: JSON response from the discord API.
211			"""
212			return await self.__send(self.__session.post, route, data=data)
213
214			async def put(self, route: str, data: Dict) -> Optional[Dict]:
215			"""
216			:return: JSON response from the discord API.
217			"""
218			return await self.__send(self.__session.put, route, data=data)
219

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