363 lines
14 KiB
Python
363 lines
14 KiB
Python
# Create your tasks here
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from __future__ import absolute_import, unicode_literals
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from apps.utils.tasks import CustomTask
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from celery import shared_task
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from pyalex import Works, config
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from apps.resm.models import Paper, PaperAbstract
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from apps.utils.snowflake import idWorker
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from django.core.cache import cache
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import requests
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from lxml import etree
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from celery import current_app
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from datetime import datetime
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import random
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config.email = "caoqianming@foxmail.com"
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config.max_retries = 0
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config.retry_backoff_factor = 0.1
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config.retry_http_codes = [429, 500, 503]
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OPENALEX_KEY = "4KJZdkCFA0uFb6IsYKc8cd"
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config.api_key = OPENALEX_KEY
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@shared_task(base=CustomTask)
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def get_paper_meta_from_openalex(publication_year:int, keywords:str="", search:str="", end_year:int=None):
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cache_key = f"openalex_cursor_{publication_year}_{keywords}{search}"
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cache_cursor = cache.get(cache_key, "*")
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if keywords or search:
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pass
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else:
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raise Exception("keywords or search must be provided")
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# filter=keywords.id:clinker|cement
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pager = Works().filter(
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publication_year=publication_year,
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has_doi=True,
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type="article"
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)
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if keywords:
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if "|" in keywords:
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keywords_list = keywords.split("|")
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else:
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keywords_list = [keywords]
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pager = pager.filter(
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keywords={"id": keywords_list}
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)
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if search:
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pager = pager.filter(
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search=search
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)
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pager = pager.select([
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"id", "doi", "title", "publication_date",
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"open_access", "authorships", "primary_location", "publication_year",
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"display_name", "content_urls"
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]).paginate(per_page=200, n_max=None, cursor=cache_cursor)
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next_cursor = pager._next_value
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for page in pager:
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papers = []
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for record in page:
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if record["doi"] and (record["display_name"] or record["title"]):
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paper = Paper()
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paper.id = idWorker.get_id()
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paper.o_keywords = keywords
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paper.o_search = search
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paper.source = "openalex"
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paper.type = "article"
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paper.openalex_id = record["id"].split("/")[-1]
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paper.doi = record["doi"].replace("https://doi.org/", "")
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paper.title = record["display_name"]
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paper.publication_date = record["publication_date"]
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paper.publication_year = record["publication_year"]
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if record["open_access"]:
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paper.is_oa = record["open_access"]["is_oa"]
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paper.oa_url = record["open_access"]["oa_url"]
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if record["authorships"]:
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paper.first_author = record["authorships"][0]["author"]["display_name"]
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if record["authorships"][0]["institutions"]:
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paper.first_author_institution = record["authorships"][0]["institutions"][0]["display_name"]
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if record["primary_location"] and record["primary_location"]["source"]:
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paper.publication_name = record["primary_location"]["source"]["display_name"]
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papers.append(paper)
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Paper.objects.bulk_create(papers, ignore_conflicts=True)
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cache.set(cache_key, next_cursor, timeout=None)
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if end_year is None:
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end_year = datetime.now().year
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if publication_year + 1 <= end_year:
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current_app.send_task(
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"apps.resm.tasks.get_paper_meta_from_openalex",
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kwargs={
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"publication_year": publication_year + 1,
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"keywords": keywords,
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"search": search,
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"end_year": end_year
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},
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countdown=5
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)
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ELSEVIER_APIKEY = 'aa8868cac9e27d6153ab0a0acd7b50bf'
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# 常用的 User-Agent 列表
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USER_AGENTS = [
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
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"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36",
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"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36",
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"Mozilla/5.0 (iPhone; CPU iPhone OS 14_7_1 like Mac OS X) AppleWebKit/605.1.15",
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]
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def get_random_headers():
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"""获取随机的请求头"""
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return {
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"User-Agent": random.choice(USER_AGENTS),
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"Accept": "application/pdf, */*",
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"Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
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"Referer": "https://www.google.com/",
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}
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def show_task_run(def_name: str):
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return cache.get(def_name, True)
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@shared_task(base=CustomTask)
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def get_abstract_from_elsevier(publication_year: int = None, number_of_task:int = 100):
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def_name = get_abstract_from_elsevier.name
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if not show_task_run(def_name):
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return "stoped"
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qs = Paper.objects.filter(has_abstract=False)
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if publication_year is not None:
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qs = qs.filter(publication_year=publication_year)
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qs = qs.exclude(
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fail_reason__contains="elsevier_doi_not_found"
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).exclude(fail_reason__contains="elsevier_abstract_not_found").order_by("publication_date")
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if not qs.exists():
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return "done"
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params = {
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"apiKey": ELSEVIER_APIKEY,
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"httpAccept": "text/xml"
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}
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err_msg = ""
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with requests.Session() as req:
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for paper in qs[:number_of_task]:
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if not show_task_run(def_name):
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break
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try:
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res = req.get(
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f"https://api.elsevier.com/content/article/doi/{paper.doi}",
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params=params,
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timeout=(3, 15)
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)
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except requests.RequestException:
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err_msg = "elsevier_request_error"
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break
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if res.status_code == 200:
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xml_str = res.text
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try:
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root = etree.fromstring(xml_str.encode("utf-8"))
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except etree.XMLSyntaxError:
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paper.save_fail_reason("elsevier_xml_error")
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continue
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ns = {"dc": "http://purl.org/dc/elements/1.1/",
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"ce": "http://www.elsevier.com/xml/common/dtd",
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"xocs": "http://www.elsevier.com/xml/xocs/dtd",}
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abstract = root.xpath("//dc:description/text()", namespaces=ns)
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if abstract:
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PaperAbstract.objects.update_or_create(
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paper=paper,
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defaults={
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"abstract": abstract[0].strip(),
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"source": "elsevier"
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}
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)
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paper.has_abstract = True
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paper.has_abstract_xml = True
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paper.fetch_status = "abstract_ready"
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else:
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paper.save_fail_reason("elsevier_abstract_not_found")
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continue
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paras = root.xpath("//ce:para", namespaces=ns)
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has_fulltext = len(paras) > 0
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if has_fulltext is False:
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rawtexts = root.xpath("//xocs:rawtext/text()",namespaces=ns)
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if rawtexts and len(rawtexts[0].strip()) > 2000:
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has_fulltext = True
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if has_fulltext:
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paper.has_fulltext = True
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paper.has_fulltext_xml = True
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paper.fetch_status = "fulltext_ready"
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paper.save_file_xml(xml_str)
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paper.save(update_fields=["has_abstract",
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"has_abstract_xml", "has_fulltext",
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"has_fulltext_xml", "update_time", "fetch_status"])
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elif res.status_code == 404:
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paper.save_fail_reason("elsevier_doi_not_found")
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qs_count = qs.count()
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if show_task_run(def_name) and qs_count > 0:
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current_app.send_task(
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"apps.resm.tasks.get_abstract_from_elsevier",
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kwargs={
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"publication_year": publication_year,
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"number_of_task": number_of_task,
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},
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countdown=5,
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)
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return f'{def_name}, {err_msg}, remaining {qs_count} papers'
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@shared_task(base=CustomTask)
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def get_pdf_from_elsevier(number_of_task=100):
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"""
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获取elsevier全文
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"""
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def_name = get_pdf_from_elsevier.name
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if not show_task_run(def_name):
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return "stoped"
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qs = Paper.objects.filter(has_fulltext=True, has_fulltext_pdf=False)
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err_msg = ""
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with requests.Session() as req:
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for paper in qs[:number_of_task]:
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if not show_task_run(def_name):
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break
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params = {
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"apiKey": ELSEVIER_APIKEY,
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"httpAccept": "application/pdf"
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}
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try:
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res = req.get(
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f"https://api.elsevier.com/content/article/doi/{paper.doi}",
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params=params,
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timeout=(3, 15)
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)
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except requests.RequestException:
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err_msg = "elsevier_request_error"
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break
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if res.status_code == 200:
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# 检查是否是PDF文件：检查魔数 %PDF 或 content-type
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is_pdf = (
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res.content.startswith(b'%PDF') or
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res.headers.get("content-type", "").startswith("application/pdf")
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)
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if is_pdf and len(res.content) > 1024: # 至少1KB
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paper.save_file_pdf(res.content)
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paper.has_fulltext_pdf = True
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paper.save(update_fields=["has_fulltext_pdf", "update_time"])
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qs_count = qs.count()
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if show_task_run(def_name) and qs_count > 0:
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current_app.send_task(
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"apps.resm.tasks.get_pdf_from_elsevier",
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kwargs={
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"number_of_task": number_of_task,
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},
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countdown=5,
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)
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return f'{def_name}, {err_msg}, remaining {qs_count} papers'
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@shared_task(base=CustomTask)
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def get_pdf_from_oa_url(number_of_task=100):
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def_name = get_pdf_from_oa_url.name
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if not show_task_run(def_name):
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return "stoped"
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qs = Paper.objects.filter(is_oa=True, has_fulltext=False).exclude(
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fail_reason__contains="oa_url_request_error"
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).exclude(fail_reason__contains="oa_url_not_pdf")
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if not qs.exists():
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return "done"
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qs0 = qs.order_by("?")
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# 分批发送任务，控制并发数量，避免过多请求
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task_count = 0
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for paper in qs0[:number_of_task]:
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if not show_task_run(def_name):
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break
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if paper.oa_url:
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# 使用 countdown 错开请求时间，避免过多并发
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countdown = task_count * 2 # 每个任务间隔2秒
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current_app.send_task(
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"apps.resm.tasks.download_pdf",
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kwargs={
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"paper_id": paper.id,
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},
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countdown=countdown,
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)
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task_count += 1
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qs_count = qs.count()
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if show_task_run(def_name) and qs_count > 0:
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current_app.send_task(
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"apps.resm.tasks.get_pdf_from_oa_url",
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kwargs={
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"number_of_task": number_of_task,
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},
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countdown=60, # 等待当前批次完成后再继续
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)
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return f'{def_name}, sent {task_count} tasks, remaining {qs_count} papers'
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@shared_task(base=CustomTask)
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def download_pdf(self, paper_id):
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"""
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下载单个论文的PDF
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"""
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try:
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paper = Paper.objects.get(id=paper_id)
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except Paper.DoesNotExist:
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return f"Paper {paper_id} not found"
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# 检查缓存，避免短时间内重复下载同一个paper
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cache_key = f"download_pdf_{paper_id}"
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if cache.get(cache_key):
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return "already_processing"
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# 设置处理中标记，防止并发重复处理
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cache.set(cache_key, True, timeout=3600)
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try:
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headers = get_random_headers()
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res = requests.get(paper.oa_url, headers=headers, timeout=(3, 15))
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except requests.RequestException as e:
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paper.save_fail_reason("oa_url_request_error")
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return f"request_error_final: {str(e)}"
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if res.status_code == 200:
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# 检查是否是PDF文件：检查魔数 %PDF 或 content-type
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is_pdf = (
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res.content.startswith(b'%PDF') or
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res.headers.get("content-type", "").startswith("application/pdf") or
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res.headers.get("content-type", "") == "application/octet-stream"
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)
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if is_pdf and len(res.content) > 1024: # 至少1KB
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paper.save_file_pdf(res.content)
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paper.has_fulltext = True
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paper.has_fulltext_pdf = True
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paper.fetch_status = "fulltext_ready"
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paper.save(update_fields=["has_fulltext", "has_fulltext_pdf", "fetch_status", "update_time"])
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return "success"
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else:
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paper.save_fail_reason("oa_url_not_pdf")
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return "not_pdf"
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else:
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# 尝试openalex下载
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try:
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res = requests.get(url=f"https://content.openalex.org/works/{paper.openalex_id}.pdf",
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params={
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"api_key": OPENALEX_KEY
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})
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except requests.RequestException as e:
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paper.save_fail_reason("oa_url_not_pdf;openalex_pdf_error")
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return f"openalex_pdf_error: {str(e)}"
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if res.status_code == 200:
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paper.save_file_pdf(res.content)
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paper.has_fulltext = True
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paper.has_fulltext_pdf = True
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paper.fetch_status = "fulltext_ready"
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paper.save(update_fields=["has_fulltext", "has_fulltext_pdf", "fetch_status", "update_time"])
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return "success"
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else:
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paper.save_fail_reason("oa_url_not_pdf;openalex_pdf_error")
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return f"openalex_pdf_error: {res.status_code}" |