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Add ApifyHttpProxyMiddleware for managing proxies
Closes: apify/actor-templates#255
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from .middlewares import ApifyRetryMiddleware | ||
from .pipelines import ActorDatasetPushPipeline | ||
from .scheduler import ApifyScheduler | ||
from .utils import get_running_event_loop_id, open_queue_with_custom_client, to_apify_request, to_scrapy_request |
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from __future__ import annotations | ||
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import base64 | ||
from typing import TYPE_CHECKING | ||
from urllib.parse import unquote | ||
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from scrapy.exceptions import NotConfigured | ||
from scrapy.utils.python import to_bytes | ||
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from apify import Actor | ||
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if TYPE_CHECKING: | ||
from scrapy import Request, Spider | ||
from scrapy.crawler import Crawler | ||
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class ApifyHttpProxyMiddleware: | ||
def __init__(self: ApifyHttpProxyMiddleware, proxy_settings: dict, auth_encoding: str = 'latin-1') -> None: | ||
self.auth_encoding = auth_encoding | ||
self.proxy_settings = proxy_settings | ||
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@classmethod | ||
def from_crawler(cls: type[ApifyHttpProxyMiddleware], crawler: Crawler) -> ApifyHttpProxyMiddleware: | ||
proxy_settings = crawler.settings.get('PROXY_SETTINGS') | ||
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if not proxy_settings: | ||
Actor.log.warning('Field "PROXY_SETTINGS" is missing in the settings. ApifyHttpProxyMiddleware is not NotConfigured.') | ||
raise NotConfigured | ||
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return cls(proxy_settings) | ||
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def process_request(self: ApifyHttpProxyMiddleware, request: Request, spider: Spider) -> None: | ||
if self.proxy_settings: | ||
request.meta['proxy'] = self.proxy_settings['url'] | ||
creds = self._basic_auth_header() | ||
request.headers[b'Proxy-Authorization'] = b'Basic ' + creds | ||
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Actor.log.info(f'ApifyHttpProxyMiddleware: request.meta={request.meta}') | ||
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def _basic_auth_header(self: ApifyHttpProxyMiddleware) -> bytes: | ||
username = self.proxy_settings['username'] | ||
password = self.proxy_settings['password'] | ||
user_pass = to_bytes(f'{unquote(username)}:{unquote(password)}', encoding=self.auth_encoding) | ||
return base64.b64encode(user_pass) |
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