Python web抓取javascript生成的内容 [英] Python web scraping for javascript generated content

问题描述

我正在尝试使用python3来返回 http://www.doi2bib.org/。 url是可预测的，因此脚本可以在不必与网页交互的情况下计算出url。我尝试过使用selenium，bs4等，但无法获取文本框内的文字。

I am trying to use python3 to return the bibtex citation generated by http://www.doi2bib.org/. The url's are predictable so the script can work out the url without having to interact with the web page. I have tried using selenium, bs4, etc but cant get the text inside the box.

url = "http://www.doi2bib.org/#/doi/10.1007/s00425-007-0544-9"
import urllib.request
from bs4 import BeautifulSoup
text = BeautifulSoup(urllib.request.urlopen(url).read())
print(text)

任何人都可以建议在python中将bibtex引用作为字符串（或其他）返回吗？

Can anyone suggest a way of returning the bibtex citation as a string (or whatever) in python?

推荐答案

此处不需要 BeautifulSoup 。有一个额外的XHR请求被发送到服务器以填写bibtex引文，模拟它，例如，用 请求 ：

You don't need BeautifulSoup here. There is an additional XHR request sent to the server to fill out the bibtex citation, simulate it, for example, with requests:

import requests

bibtex_id = '10.1007/s00425-007-0544-9'

url = "http://www.doi2bib.org/#/doi/{id}".format(id=bibtex_id)
xhr_url = 'http://www.doi2bib.org/doi2bib'

with requests.Session() as session:
    session.get(url)

    response = session.get(xhr_url, params={'id': bibtex_id})
    print(response.content)

打印：

@article{Burgert_2007,
    doi = {10.1007/s00425-007-0544-9},
    url = {http://dx.doi.org/10.1007/s00425-007-0544-9},
    year = 2007,
    month = {jun},
    publisher = {Springer Science $\mathplus$ Business Media},
    volume = {226},
    number = {4},
    pages = {981--987},
    author = {Ingo Burgert and Michaela Eder and Notburga Gierlinger and Peter Fratzl},
    title = {Tensile and compressive stresses in tracheids are induced by swelling based on geometrical constraints of the wood cell},
    journal = {Planta}
}

---

你也可以用 selenium 来解决它。这里的关键技巧是使用显式等待等待引用< a href =http://selenium-python.readthedocs.org/en/latest/api.html#selenium.webdriver.support.expected_conditions.visibility_of_element_located>以显示：

---

You can also solve it with selenium. The key trick here is to use an Explicit Wait to wait for the citation to become visible:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Firefox()
driver.get('http://www.doi2bib.org/#/doi/10.1007/s00425-007-0544-9')

element = WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.XPATH, '//pre[@ng-show="bib"]')))
print(element.text)

driver.close()

打印与上述解决方案相同。

Prints the same as the above solution.

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