mirror of
https://github.com/thecyberlearn/chat-backend.git
synced 2026-08-18 14:12:53 +00:00
a0fce0b484
Features: - Django REST API backend - Multi-strategy web scraping system (Beautiful Soup, Playwright, Firecrawl) - Anti-detection features (proxy rotation, user-agent rotation) - Data export functionality (JSON, CSV, TXT) - Business and CrawledPage models - Enhanced crawling service with fallback mechanisms 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
445 lines
14 KiB
Python
445 lines
14 KiB
Python
# Copyright (c) Microsoft Corporation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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import math
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import os
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import re
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import time
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import traceback
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from pathlib import Path
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from types import TracebackType
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from typing import (
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TYPE_CHECKING,
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Any,
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Callable,
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Dict,
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List,
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Literal,
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Optional,
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Pattern,
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Set,
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TypedDict,
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TypeVar,
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Union,
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cast,
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)
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from urllib.parse import urljoin
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from playwright._impl._api_structures import NameValue
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from playwright._impl._errors import (
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Error,
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TargetClosedError,
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TimeoutError,
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is_target_closed_error,
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rewrite_error,
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)
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from playwright._impl._glob import glob_to_regex
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from playwright._impl._greenlets import RouteGreenlet
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from playwright._impl._str_utils import escape_regex_flags
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if TYPE_CHECKING: # pragma: no cover
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from playwright._impl._api_structures import HeadersArray
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from playwright._impl._network import Request, Response, Route
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URLMatch = Union[str, Pattern[str], Callable[[str], bool]]
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URLMatchRequest = Union[str, Pattern[str], Callable[["Request"], bool]]
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URLMatchResponse = Union[str, Pattern[str], Callable[["Response"], bool]]
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RouteHandlerCallback = Union[
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Callable[["Route"], Any], Callable[["Route", "Request"], Any]
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]
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ColorScheme = Literal["dark", "light", "no-preference", "null"]
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ForcedColors = Literal["active", "none", "null"]
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ReducedMotion = Literal["no-preference", "null", "reduce"]
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DocumentLoadState = Literal["commit", "domcontentloaded", "load", "networkidle"]
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KeyboardModifier = Literal["Alt", "Control", "ControlOrMeta", "Meta", "Shift"]
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MouseButton = Literal["left", "middle", "right"]
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ServiceWorkersPolicy = Literal["allow", "block"]
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HarMode = Literal["full", "minimal"]
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HarContentPolicy = Literal["attach", "embed", "omit"]
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RouteFromHarNotFoundPolicy = Literal["abort", "fallback"]
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class ErrorPayload(TypedDict, total=False):
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message: str
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name: str
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stack: str
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value: Optional[Any]
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class HarRecordingMetadata(TypedDict, total=False):
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path: str
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content: Optional[HarContentPolicy]
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def prepare_record_har_options(params: Dict) -> Dict[str, Any]:
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out_params: Dict[str, Any] = {"path": str(params["recordHarPath"])}
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if "recordHarUrlFilter" in params:
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opt = params["recordHarUrlFilter"]
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if isinstance(opt, str):
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out_params["urlGlob"] = opt
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if isinstance(opt, Pattern):
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out_params["urlRegexSource"] = opt.pattern
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out_params["urlRegexFlags"] = escape_regex_flags(opt)
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del params["recordHarUrlFilter"]
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if "recordHarMode" in params:
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out_params["mode"] = params["recordHarMode"]
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del params["recordHarMode"]
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new_content_api = None
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old_content_api = None
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if "recordHarContent" in params:
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new_content_api = params["recordHarContent"]
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del params["recordHarContent"]
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if "recordHarOmitContent" in params:
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old_content_api = params["recordHarOmitContent"]
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del params["recordHarOmitContent"]
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content = new_content_api or ("omit" if old_content_api else None)
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if content:
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out_params["content"] = content
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return out_params
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class ParsedMessageParams(TypedDict):
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type: str
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guid: str
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initializer: Dict
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class ParsedMessagePayload(TypedDict, total=False):
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id: int
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guid: str
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method: str
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params: ParsedMessageParams
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result: Any
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error: ErrorPayload
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class Document(TypedDict):
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request: Optional[Any]
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class FrameNavigatedEvent(TypedDict):
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url: str
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name: str
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newDocument: Optional[Document]
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error: Optional[str]
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Env = Dict[str, Union[str, float, bool]]
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class URLMatcher:
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def __init__(self, base_url: Union[str, None], match: URLMatch) -> None:
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self._callback: Optional[Callable[[str], bool]] = None
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self._regex_obj: Optional[Pattern[str]] = None
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if isinstance(match, str):
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if base_url and not match.startswith("*"):
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match = urljoin(base_url, match)
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regex = glob_to_regex(match)
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self._regex_obj = re.compile(regex)
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elif isinstance(match, Pattern):
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self._regex_obj = match
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else:
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self._callback = match
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self.match = match
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def matches(self, url: str) -> bool:
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if self._callback:
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return self._callback(url)
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if self._regex_obj:
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return cast(bool, self._regex_obj.search(url))
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return False
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class HarLookupResult(TypedDict, total=False):
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action: Literal["error", "redirect", "fulfill", "noentry"]
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message: Optional[str]
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redirectURL: Optional[str]
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status: Optional[int]
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headers: Optional["HeadersArray"]
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body: Optional[str]
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class TimeoutSettings:
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def __init__(self, parent: Optional["TimeoutSettings"]) -> None:
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self._parent = parent
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self._default_timeout: Optional[float] = None
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self._default_navigation_timeout: Optional[float] = None
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def set_default_timeout(self, timeout: Optional[float]) -> None:
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self._default_timeout = timeout
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def timeout(self, timeout: float = None) -> float:
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if timeout is not None:
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return timeout
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if self._default_timeout is not None:
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return self._default_timeout
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if self._parent:
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return self._parent.timeout()
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return 30000
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def set_default_navigation_timeout(
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self, navigation_timeout: Optional[float]
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) -> None:
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self._default_navigation_timeout = navigation_timeout
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def default_navigation_timeout(self) -> Optional[float]:
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return self._default_navigation_timeout
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def default_timeout(self) -> Optional[float]:
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return self._default_timeout
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def navigation_timeout(self) -> float:
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if self._default_navigation_timeout is not None:
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return self._default_navigation_timeout
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if self._parent:
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return self._parent.navigation_timeout()
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return 30000
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def serialize_error(ex: Exception, tb: Optional[TracebackType]) -> ErrorPayload:
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return ErrorPayload(
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message=str(ex), name="Error", stack="".join(traceback.format_tb(tb))
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)
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def parse_error(error: ErrorPayload, log: Optional[str] = None) -> Error:
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base_error_class = Error
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if error.get("name") == "TimeoutError":
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base_error_class = TimeoutError
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if error.get("name") == "TargetClosedError":
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base_error_class = TargetClosedError
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if not log:
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log = ""
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exc = base_error_class(patch_error_message(error["message"]) + log)
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exc._name = error["name"]
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exc._stack = error["stack"]
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return exc
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def patch_error_message(message: str) -> str:
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match = re.match(r"(\w+)(: expected .*)", message)
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if match:
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message = to_snake_case(match.group(1)) + match.group(2)
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message = message.replace(
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"Pass { acceptDownloads: true }", "Pass 'accept_downloads=True'"
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)
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return message
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def locals_to_params(args: Dict) -> Dict:
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copy = {}
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for key in args:
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if key == "self":
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continue
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if args[key] is not None:
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copy[key] = (
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args[key]
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if not isinstance(args[key], Dict)
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else locals_to_params(args[key])
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)
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return copy
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def monotonic_time() -> int:
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return math.floor(time.monotonic() * 1000)
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class RouteHandlerInvocation:
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complete: "asyncio.Future"
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route: "Route"
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def __init__(self, complete: "asyncio.Future", route: "Route") -> None:
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self.complete = complete
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self.route = route
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class RouteHandler:
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def __init__(
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self,
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matcher: URLMatcher,
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handler: RouteHandlerCallback,
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is_sync: bool,
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times: Optional[int] = None,
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):
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self.matcher = matcher
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self.handler = handler
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self._times = times if times else math.inf
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self._handled_count = 0
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self._is_sync = is_sync
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self._ignore_exception = False
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self._active_invocations: Set[RouteHandlerInvocation] = set()
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def matches(self, request_url: str) -> bool:
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return self.matcher.matches(request_url)
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async def handle(self, route: "Route") -> bool:
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handler_invocation = RouteHandlerInvocation(
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asyncio.get_running_loop().create_future(), route
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)
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self._active_invocations.add(handler_invocation)
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try:
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return await self._handle_internal(route)
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except Exception as e:
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# If the handler was stopped (without waiting for completion), we ignore all exceptions.
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if self._ignore_exception:
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return False
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if is_target_closed_error(e):
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# We are failing in the handler because the target has closed.
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# Give user a hint!
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optional_async_prefix = "await " if not self._is_sync else ""
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raise rewrite_error(
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e,
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f"\"{str(e)}\" while running route callback.\nConsider awaiting `{optional_async_prefix}page.unroute_all(behavior='ignoreErrors')`\nbefore the end of the test to ignore remaining routes in flight.",
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)
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raise e
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finally:
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handler_invocation.complete.set_result(None)
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self._active_invocations.remove(handler_invocation)
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async def _handle_internal(self, route: "Route") -> bool:
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handled_future = route._start_handling()
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self._handled_count += 1
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if self._is_sync:
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handler_finished_future = route._loop.create_future()
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def _handler() -> None:
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try:
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self.handler(route, route.request) # type: ignore
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handler_finished_future.set_result(None)
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except Exception as e:
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handler_finished_future.set_exception(e)
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# As with event handlers, each route handler is a potentially blocking context
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# so it needs a fiber.
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g = RouteGreenlet(_handler)
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g.switch()
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await handler_finished_future
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else:
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coro_or_future = self.handler(route, route.request) # type: ignore
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if coro_or_future:
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# separate task so that we get a proper stack trace for exceptions / tracing api_name extraction
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await asyncio.ensure_future(coro_or_future)
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return await handled_future
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async def stop(self, behavior: Literal["ignoreErrors", "wait"]) -> None:
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# When a handler is manually unrouted or its page/context is closed we either
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# - wait for the current handler invocations to finish
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# - or do not wait, if the user opted out of it, but swallow all exceptions
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# that happen after the unroute/close.
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if behavior == "ignoreErrors":
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self._ignore_exception = True
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else:
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tasks = []
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for activation in self._active_invocations:
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if not activation.route._did_throw:
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tasks.append(activation.complete)
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await asyncio.gather(*tasks)
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@property
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def will_expire(self) -> bool:
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return self._handled_count + 1 >= self._times
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@staticmethod
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def prepare_interception_patterns(
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handlers: List["RouteHandler"],
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) -> List[Dict[str, str]]:
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patterns = []
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all = False
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for handler in handlers:
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if isinstance(handler.matcher.match, str):
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patterns.append({"glob": handler.matcher.match})
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elif isinstance(handler.matcher._regex_obj, re.Pattern):
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patterns.append(
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{
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"regexSource": handler.matcher._regex_obj.pattern,
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"regexFlags": escape_regex_flags(handler.matcher._regex_obj),
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}
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)
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else:
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all = True
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if all:
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return [{"glob": "**/*"}]
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return patterns
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to_snake_case_regex = re.compile("((?<=[a-z0-9])[A-Z]|(?!^)[A-Z](?=[a-z]))")
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def to_snake_case(name: str) -> str:
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return to_snake_case_regex.sub(r"_\1", name).lower()
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def make_dirs_for_file(path: Union[Path, str]) -> None:
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if not os.path.isabs(path):
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path = Path.cwd() / path
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os.makedirs(os.path.dirname(path), exist_ok=True)
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async def async_writefile(file: Union[str, Path], data: Union[str, bytes]) -> None:
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def inner() -> None:
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with open(file, "w" if isinstance(data, str) else "wb") as fh:
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fh.write(data)
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loop = asyncio.get_running_loop()
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await loop.run_in_executor(None, inner)
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async def async_readfile(file: Union[str, Path]) -> bytes:
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def inner() -> bytes:
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with open(file, "rb") as fh:
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return fh.read()
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loop = asyncio.get_running_loop()
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return await loop.run_in_executor(None, inner)
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T = TypeVar("T")
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def to_impl(obj: T) -> T:
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if hasattr(obj, "_impl_obj"):
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return cast(Any, obj)._impl_obj
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return obj
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def object_to_array(obj: Optional[Dict]) -> Optional[List[NameValue]]:
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if not obj:
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return None
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result = []
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for key, value in obj.items():
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result.append(NameValue(name=key, value=str(value)))
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return result
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def is_file_payload(value: Optional[Any]) -> bool:
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return (
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isinstance(value, dict)
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and "name" in value
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and "mimeType" in value
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and "buffer" in value
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)
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TEXTUAL_MIME_TYPE = re.compile(
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r"^(text\/.*?|application\/(json|(x-)?javascript|xml.*?|ecmascript|graphql|x-www-form-urlencoded)|image\/svg(\+xml)?|application\/.*?(\+json|\+xml))(;\s*charset=.*)?$"
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)
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def is_textual_mime_type(mime_type: str) -> bool:
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return bool(TEXTUAL_MIME_TYPE.match(mime_type))
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