113 lines
3.5 KiB
Python
113 lines
3.5 KiB
Python
import re
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from typing import Optional, Tuple
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import httpx
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HEADERS = {
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"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0",
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"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
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"Accept-Language": "en-US,en;q=0.5",
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"Accept-Encoding": "gzip, deflate, br",
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"DNT": "1",
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"Sec-GPC": "1",
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"Connection": "keep-alive",
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"Upgrade-Insecure-Requests": "1",
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"Sec-Fetch-Dest": "document",
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"Sec-Fetch-Mode": "navigate",
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"Sec-Fetch-Site": "none",
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"Sec-Fetch-User": "?1",
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"Pragma": "no-cache",
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"Cache-Control": "no-cache",
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}
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async def _get_cookies(client):
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# Make a request to https://www.coles.com.au/ as if we were a normal browser, then return the cookies
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response = await client.get(
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"https://www.coles.com.au/product/coles-strawberries-250g-5191256",
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headers=HEADERS,
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follow_redirects=True,
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)
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version = re.findall(r"202[4-9][01]\d[0-2]\d.02_v\d.\d\d.\d", response.text)
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if len(version) == 0:
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raise Exception("Could not find the Coles API")
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return dict(response.cookies), version[0]
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def _get_package_size(size: str) -> Tuple[int, str]:
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if size:
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match = re.match(r"(\d+)(.*)", size)
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if match:
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return int(match.group(1)), match.group(2)
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return 1, "items"
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def _get_client():
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return httpx.AsyncClient()
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api_details = None
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async def _request_details(product_id: str) -> Optional[dict]:
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global api_details
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async with _get_client() as client:
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if not api_details:
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api_details = await _get_cookies(client)
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cookies, api_version = api_details
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url = _get_product_details_url(api_version, product_id)
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try:
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response = await client.get(
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url, headers=HEADERS, follow_redirects=True, cookies=cookies
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)
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response.raise_for_status()
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return response.json()
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except httpx.HTTPError as ne:
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print(ne)
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api_details = None
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return None
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def _get_product_details_url(version: str, product_id: str) -> str:
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# https://www.coles.com.au/_next/data/20240926.02_v4.18.0/en/product/cadbury-favourites-boxed-chocolate-340g-3571992.json?slug=cadbury-favourites-boxed-chocolate-340g-3571992
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# https://www.coles.com.au/_next/data/20240926.02_v4.18.0/en/product/coles-blueberries-170g-3571948.json?slug=coles-blueberries-170g-3571948
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#
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return f"https://www.coles.com.au/_next/data/{version}/en/product/{product_id}.json"
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def get_product_id(url: str) -> Optional[str]:
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# https://www.coles.com.au/product/cadbury-favourites-boxed-chocolate-340g-3571992
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regex = r"https://www.coles.com.au/product/([^/]+)/?.*"
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match = re.match(regex, url)
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if match:
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return match.group(1)
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return None
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async def scrape(product_id: str) -> Tuple[dict, dict]:
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raw_data = await _request_details(product_id)
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if raw_data is None:
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raw_data = {"pageProps": {"product": {"size": "", "images": []}}}
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product = raw_data["pageProps"]["product"]
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quantity, unit = _get_package_size(product["size"])
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img_prefix = "https://shop.coles.com.au"
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images = product["images"][0]
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product_data = {
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"name": product["name"],
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"quantity": quantity,
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"unit": unit,
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"img_small": (img_prefix + images["thumb"]["path"]) if images else None,
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"img_large": (img_prefix + images["full"]["path"]) if images else None,
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}
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return product_data, raw_data
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