281 lines
9.7 KiB
Python
281 lines
9.7 KiB
Python
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# 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, NoSuchWindowException, WebDriverException
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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"[维普切换窗口] 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[5]/div/span').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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try:
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title_element = row.find_element(By.XPATH, 'td[2]/div/div/a')
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title = title_element.text.strip()
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print("论文名称:", title)
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except Exception:
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print("[错误] 标题元素未找到")
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return None
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try:
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author_elems = row.find_elements(
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By.XPATH,
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".//div[contains(@class,'six-wrap')]//*[@data-warden-event-id='author-click']"
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)
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authors = [e.text.strip() for e in author_elems if e.text.strip()]
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except Exception:
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authors = []
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print("作者列表:", authors)
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try:
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source = row.find_element(By.XPATH, "td[4]/div/a").text
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except Exception:
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source = ""
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print("期刊来源:", source)
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print("类型:", type_text)
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time.sleep(1)
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try:
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origin = driver.current_window_handle
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except NoSuchWindowException:
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print("[错误] 当前窗口不存在")
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return None
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existing_handles = driver.window_handles
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# 点击标题打开新窗口
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clicked = False
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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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clicked = True
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except Exception:
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try:
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ActionChains(driver).move_to_element(title_element).pause(1).click(title_element).perform()
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clicked = True
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except Exception:
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try:
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driver.execute_script("arguments[0].click();", title_element)
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clicked = True
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except Exception:
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print("[错误] 点击标题失败")
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clicked = False
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if not clicked:
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return None
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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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# 获取新窗口句柄
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new_handles = driver.window_handles
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detail_tab = next((h for h in new_handles if h != origin), None)
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if not detail_tab:
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print("[警告] 找不到新窗口")
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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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try:
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originalLink = driver.current_url
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print("详情页链接:", originalLink)
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except NoSuchWindowException:
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print("[错误] 新窗口已关闭")
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return None
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# 获取摘要
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summary_text = ""
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try:
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abstract_elems = driver.find_elements(By.CSS_SELECTOR, "span.ellipsis.content-text")
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if abstract_elems:
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summary_text = abstract_elems[0].text.strip()
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else:
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print("[警告] 摘要信息未找到")
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except Exception:
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summary_text = ""
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print("摘要:", summary_text)
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# 获取关键词
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keywords = []
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try:
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keyword_container = driver.find_element(By.XPATH, "//div[contains(., '关键词')]")
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keyword_spans = keyword_container.find_elements(By.CSS_SELECTOR, "span.select_hover.pointer span")
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keywords = [k.text.strip() for k in keyword_spans if k.text.strip()]
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except Exception:
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keywords = []
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print("关键词列表:", keywords)
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time.sleep(1)
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except (NoSuchWindowException, WebDriverException):
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print("[警告] 窗口操作失败")
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return None
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finally:
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# 安全关闭新窗口
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try:
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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, 1.0))
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except (NoSuchWindowException, WebDriverException):
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print("[警告] 无法切回原窗口")
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return {
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"title": title,
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"author": authors,
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"source": source,
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"site":"维普",
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"keywords": keywords,
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"originalLink": originalLink if 'originalLink' in locals() else "",
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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, '#search_container > div.s-list > div.yx-start.content.al-str'))
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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, '//*[@id="search_container"]/div[2]/div[2]/div/div/div[3]/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.CSS_SELECTOR, "i.el-icon-arrow-right.pointer")
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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(5)
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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 weipu(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.cqvip.com/")
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search_input = driver.find_element(By.XPATH, "//input[@placeholder='请输入检索词']")
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search_input.send_keys(keyword)
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time.sleep(2)
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search_button = driver.find_element(By.XPATH, "//button[.//span[contains(text(),'检索')]]")
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search_button.click()
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time.sleep(3)
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#切换展示模式
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element = WebDriverWait(driver, 10).until(
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EC.element_to_be_clickable(
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(By.CSS_SELECTOR, 'i[data-warden-event-id="list-arrange"]')
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)
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)
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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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time.sleep(2)
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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] 使用被引量排序")
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try:
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driver.find_element(By.XPATH, '//span[contains(text(),"被引量")]').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[contains(text(),"时效性")]').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 = "深度学习"
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limit=10
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weipu(keyword,limit,["relevance"])
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