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"""Module to crawl the website 'https://www.mofcom.gov.cn' to fetch and process articles."""
import time
import urllib.request
from datetime import datetime, timedelta
from lxml import etree
from prefect import task, get_run_logger
from controllers.utils import crawl_by_url
@task(name = "Data Collection - mofcom", log_prints = True)
def crawl(delta):
"""
Crawls the website http://www.mofcom.gov.cn to retrieve articles based on the specified delta.
Parameters:
- delta (int): The number of days in the past from today to retrieve articles.
Returns:
None
"""
logger = get_run_logger()
logger.info("mofcom.gov.cn")
categories = ['jdzhsw', 'jdgnmy', 'jddwmy', 'jdtzhz']
for category in categories:
i = 1
while i > -1:
if i == 1:
url = f"http://www.mofcom.gov.cn/article/zcjd/{category}/"
else:
url = f"http://www.mofcom.gov.cn/article/zcjd/{category}/?{i}"
i = i + 1
try:
req = urllib.request.urlopen(url, timeout=60)
text = req.read()
html_text = text.decode("utf-8")
page = etree.HTML(html_text)
articlelist = page.xpath(
"//section[contains(@class, 'listCon iListCon f-mt30')]/ul/li")
for article in articlelist:
if isinstance(article, etree._Element):
subelement = etree.tostring(article).decode()
subpage = etree.HTML(subelement)
date = subpage.xpath("//span/text()")[0]
parsed_datetime = datetime.strptime(
time.strftime("%Y-%m-%d",
time.strptime(date, "%Y-%m-%d %H:%M:%S")),
"%Y-%m-%d")
if parsed_datetime < (datetime.today() - timedelta(days=delta)):
i = -1
else:
urls = subpage.xpath("//a/@href")
for url in urls:
try:
article = {}
if '/article/zcjd' in url:
url = "http://www.mofcom.gov.cn" + url
article['category'] = "Policy Interpretation"
else:
article['category'] = "Policy Release"
crawl_by_url(url, article)
except (urllib.error.URLError, etree.XMLSyntaxError) as error:
logger.error(error)
except (urllib.error.URLError, etree.XMLSyntaxError) as error:
i = -1
logger.error(error)
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