我在 ubuntu 16.04 服务器上实现 dryscrape 时遇到问题(在 digital ocean 上进行全新安装) - 目的是抓取 JS 填充的网站。
我正在遵循 here 中的 dryscrape 安装说明:
apt-get update
apt-get install qt5-default libqt5webkit5-dev build-essential \
python-lxml python-pip xvfb
pip install dryscrape
然后运行我发现的以下 python 脚本 here以及同一链接的测试 html 页面。 (返回html或JS)
Python
import dryscrape
from bs4 import BeautifulSoup
session = dryscrape.Session()
my_url = 'http://www.example.com/scrape.php'
session.visit(my_url)
response = session.body()
soup = BeautifulSoup(response)
soup.find(id="intro-text")
HTML - scrape.php
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Javascript scraping test</title>
</head>
<body>
<p id='intro-text'>No javascript support</p>
<script>
document.getElementById('intro-text').innerHTML = 'Yay! Supports javascript';
</script>
</body>
</html>
当我这样做时，我似乎无法获得预期的返回数据，而只是错误。
我想知道我是否遗漏了任何明显的东西？
注意:我已经搜索了大量安装指南/线程，但似乎无法使其正常工作。我也尝试过使用 Selenium ，但似乎也没有取得任何进展。非常感谢。
输出
Traceback (most recent call last):
File "js.py", line 3, in <module>
session = dryscrape.Session()
File "/usr/local/lib/python2.7/dist-packages/dryscrape/session.py", line 22, in __init__
self.driver = driver or DefaultDriver()
File "/usr/local/lib/python2.7/dist-packages/dryscrape/driver/webkit.py", line 30, in __init__
super(Driver, self).__init__(**kw)
File "/usr/local/lib/python2.7/dist-packages/webkit_server.py", line 230, in __init__
self.conn = connection or ServerConnection()
File "/usr/local/lib/python2.7/dist-packages/webkit_server.py", line 507, in __init__
self._sock = (server or get_default_server()).connect()
File "/usr/local/lib/python2.7/dist-packages/webkit_server.py", line 450, in get_default_server
_default_server = Server()
File "/usr/local/lib/python2.7/dist-packages/webkit_server.py", line 424, in __init__
raise NoX11Error("Could not connect to X server. "
webkit_server.NoX11Error: Could not connect to X server. Try calling dryscrape.start_xvfb() before creating a session.
工作脚本
import dryscrape
from bs4 import BeautifulSoup
dryscrape.start_xvfb()
session = dryscrape.Session()
my_url = 'https://www.example.com/scrape.php'
session.visit(my_url)
response = session.body()
soup = BeautifulSoup(response, "html.parser")
print soup.find(id="intro-text").text
最佳答案
您没有运行 X 服务器。线索是
Try calling dryscrape.start_xvfb() before creating a session
参见http://dryscrape.readthedocs.io/en/latest/usage.html
if 'linux' in sys.platform:
# start xvfb in case no X is running. Make sure xvfb
# is installed, otherwise this won't work!
dryscrape.start_xvfb()
http://dryscrape.readthedocs.io/en/latest/installation.html
xvfb_ (necessary only if no other X server is available)
所以你可以添加:
dryscrape.start_xvfb()
之前:
session = dryscrape.Session()
关于javascript - drysrape 安装 Ubuntu 服务器 16.04，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45533732/