243 lines
9.2 KiB
Python
Executable File
243 lines
9.2 KiB
Python
Executable File
# coding=utf-8
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import json
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import time
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import random
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import sys
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import os
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sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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import traceback
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support.ui import WebDriverWait
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from selenium.webdriver.support import expected_conditions as EC
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from selenium.common.exceptions import TimeoutException
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from selenium.webdriver.common.action_chains import ActionChains
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from config import create_browser,_scroll_into_view
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def find_valid_detail_tab(driver, origin_handle, timeout=10):
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"""从现有句柄中挑出一个不是原始窗口的有效新标签页。"""
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end_time = time.time() + timeout
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while time.time() < end_time:
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for handle in driver.window_handles:
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if handle != origin_handle:
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try:
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driver.switch_to.window(handle)
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current_url = driver.current_url
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if not current_url.startswith("chrome://") and current_url != "about:blank":
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print(f"[万方切换窗口] 成功 → {driver.title}")
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return handle
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except Exception:
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pass
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time.sleep(0.5)
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raise Exception("未能在规定时间内找到有效详情页窗口")
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# ---------主函数 ---------
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def extract_row_info(row, driver):
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"""抓取单条记录信息并返回字典"""
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try:
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type_text = row.find_element(By.XPATH, 'td[6]').text.strip()
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except Exception:
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type_text = ""
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# 如果不是期刊论文，直接跳过
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if type_text != "期刊论文":
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return None
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title_element= row.find_element(By.XPATH, 'td[2]/span[1]')
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title = row.find_element(By.XPATH, 'td[2]/span[1]').text.strip()
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author_area=row.find_element(By.XPATH,'td[3]')
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authors = author_area.find_elements(By.XPATH, ".//span[@class='authors'][not(contains(text(),'年'))]")
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author_names = [a.text for a in authors]
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# 获取期刊来源
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source = row.find_element(By.XPATH, "td[4]/span").text
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# 获取期刊时间
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date = row.find_element(By.XPATH, 'td[5]').text
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# 获取期刊引用次数
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quote= row.find_element(By.XPATH, 'td[7]').text
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# 获取期刊下载次数
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download = row.find_element(By.XPATH, 'td[8]').text
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print("类型:", type_text)
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print("论文名称", title)
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print("作者列表:", author_names)
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print("期刊来源:", source)
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print("时间:", date)
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print("引用次数:", quote)
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print("下载次数:", download)
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time.sleep(1)
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origin = driver.current_window_handle
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existing_handles = driver.window_handles
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try:
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_scroll_into_view(driver, title_element)
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title_element.click()
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except Exception:
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try:
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ActionChains(driver).move_to_element(title_element).pause(0.1).click(title_element).perform()
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except Exception:
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driver.execute_script("arguments[0].click();", title_element)
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try:
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WebDriverWait(driver, 10).until(EC.new_window_is_opened(existing_handles))
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except TimeoutException:
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print("[警告] 未检测到新窗口，跳过")
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return None
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try:
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detail_tab = find_valid_detail_tab(driver, origin)
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if detail_tab not in driver.window_handles:
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return None
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driver.switch_to.window(detail_tab)
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time.sleep(1)
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originalLink = driver.current_url
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print("详情页链接:", originalLink)
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# 尝试获取摘要
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summary_text = ""
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try:
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summary_container = driver.find_element(By.CSS_SELECTOR, "#essential > div.detailList > div.summary.list")
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text_span = summary_container.find_element(By.CSS_SELECTOR, "span.text-overflow > span > span")
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summary_text = text_span.text
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except Exception:
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# 没找到元素，就保持 summary_text 为空
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print("[警告] 摘要信息未找到")
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# 判断折叠按钮
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try:
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expand_btn = summary_container.find_element(By.CSS_SELECTOR,
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"span.slot-box > span.abstractIcon.btn[title='查看全部']")
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driver.execute_script("arguments[0].click();", expand_btn)
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time.sleep(1)
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summary_text = text_span.text
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except Exception:
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pass
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print("摘要：", summary_text)
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#获取关键词信息
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# 定位关键词容器
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keyword_container = driver.find_element(By.CSS_SELECTOR, "#essential > div.detailList > div.keyword.list")
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# 定位里面所有的 span
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keyword_elements = keyword_container.find_elements(By.CSS_SELECTOR, "div.itemKeyword a span")
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# 提取文本
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keywords = [el.text.strip() for el in keyword_elements]
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print("关键词:", keywords)
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time.sleep(1)
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finally:
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# 仅关闭非原窗口
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if driver.current_window_handle != origin:
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driver.close()
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driver.switch_to.window(origin)
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time.sleep(random.uniform(0.5, 1.5))
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return {
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"title": title, # 确保函数里有定义
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"author": author_names,
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"source": source,
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"date": date,
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"site":"万方",
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"quote": quote,
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"originalLink": originalLink,
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"download": download,
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"keywords": keywords,
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"summary": summary_text
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}
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def crawl_current_sort(driver, limit):
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"""抓取当前排序下的 limit 条记录"""
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fetched_count = 0
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results = []
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while fetched_count < limit:
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try:
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WebDriverWait(driver, 10).until(
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EC.presence_of_element_located((By.CSS_SELECTOR, '#anxs-logoName_sns'))
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)
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except TimeoutException:
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print("[警告] 本页结果表格未出现，尝试继续")
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time.sleep(2)
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rows = driver.find_elements(By.XPATH, '/ html / body / div[5] / div / div[3] / div[2] / div / div[4] / div[2] / div[1] / table / tbody / tr')
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for row in rows:
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if fetched_count >= limit:
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break
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try:
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info = extract_row_info(row, driver)
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if info:
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results.append(info)
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time.sleep(2)
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fetched_count += 1
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except Exception as e:
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print(f"[错误] {e}")
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traceback.print_exc()
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try:
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if driver.window_handles:
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driver.switch_to.window(driver.window_handles[0])
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except Exception:
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pass
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# 翻页
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try:
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next_btn = driver.find_element(By.XPATH, "/html/body/div[5]/div/div[3]/div[2]/div/div[3]/div[2]/div[4]/span[3]")
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if not next_btn.is_enabled() or fetched_count >= limit:
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break
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_scroll_into_view(driver, next_btn)
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try:
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next_btn.click()
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except Exception:
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try:
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ActionChains(driver).move_to_element(next_btn).pause(0.1).click(next_btn).perform()
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except Exception:
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driver.execute_script("arguments[0].click();", next_btn)
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time.sleep(1)
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except Exception:
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print("[INFO] 已到最后一页或翻页失败")
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break
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return results
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def wangfang(keyword, limit, sort_options=None):
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"""主函数：三种排序抓取"""
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driver = create_browser()
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wait = WebDriverWait(driver, 15)
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all_results = {}
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if not sort_options:
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sort_options = ["relevance"] # 默认相关性
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try:
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driver.get("https://www.wanfangdata.com.cn/index.html")
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wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#search-input"))).send_keys(keyword)
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driver.find_element(By.CLASS_NAME, "search-icon").click()
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time.sleep(1)
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#切换展示模式
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element=driver.find_element(By.CLASS_NAME, "toggle-table-list")
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driver.execute_script("arguments[0].scrollIntoView({block: 'center'});", element)
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time.sleep(2)
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element.click()
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for sort_name in sort_options:
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if sort_name == "relevance":
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print("[INFO] 使用相关性排序（默认）")
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elif sort_name == "download_count":
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print("[INFO] 使用下载量排序")
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try:
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driver.find_element(By.XPATH, '//span[text()="被引频次"]').click()
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except Exception:
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print(f"[WARN] 点击排序 {sort_name} 失败")
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elif sort_name == "publication_time":
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print("[INFO] 使用时间排序")
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try:
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driver.find_element(By.XPATH, '//span[text()="出版时间"]').click()
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except Exception:
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print(f"[WARN] 点击排序 {sort_name} 失败")
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time.sleep(1)
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results = crawl_current_sort(driver, limit)
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all_results[sort_name] = results
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finally:
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try:
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driver.quit()
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except Exception:
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pass
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print("[DONE] PDF处理完成")
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print(json.dumps(all_results, ensure_ascii=False, indent=2))
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return all_results
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if __name__ == '__main__':
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keyword = "知识图谱"
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limit=100
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wangfang(keyword,limit, ["relevance", "publication_time"]) |