A lightweight,asynchronous micro-framework, written with asyncio
and aiohttp
, aims to make crawling url as convenient as possible.
pip install aspider
pip install git+https://github.com/howie6879/aspider
We provide an easy way to request
a url and return a friendly response
:
import asyncio
from aspider import Request
request = Request("https://news.ycombinator.com/")
response = asyncio.get_event_loop().run_until_complete(request.fetch())
# Output
# [2018-07-25 11:23:42,620]-Request-INFO <GET: https://news.ycombinator.com/>
# <Response url[text]: https://news.ycombinator.com/ status:200 metadata:{}>
JavaScript Support:
request = Request("https://www.jianshu.com/", load_js=True)
response = asyncio.get_event_loop().run_until_complete(request.fetch())
print(response.body)
Note, when you ever run the fetch()
method first time,, it will download a recent version of Chromium (~100MB). This only happens once.
Let's take a look at a quick example of using Item
to extract target data. Start off by adding the following to your demo.py:
import asyncio
from aspider import AttrField, TextField, Item
class HackerNewsItem(Item):
target_item = TextField(css_select='tr.athing')
title = TextField(css_select='a.storylink')
url = AttrField(css_select='a.storylink', attr='href')
async def clean_title(self, value):
return value
items = asyncio.get_event_loop().run_until_complete(HackerNewsItem.get_items(url="https://news.ycombinator.com/"))
for item in items:
print(item.title, item.url)
Run: python demo.py
Notorious ‘Hijack Factory’ Shunned from Web https://krebsonsecurity.com/2018/07/notorious-hijack-factory-shunned-from-web/
......
For multiple pages, you can solve this with Spider
Create hacker_news_spider.py
:
import aiofiles
from aspider import AttrField, TextField, Item, Spider
class HackerNewsItem(Item):
target_item = TextField(css_select='tr.athing')
title = TextField(css_select='a.storylink')
url = AttrField(css_select='a.storylink', attr='href')
async def clean_title(self, value):
return value
class HackerNewsSpider(Spider):
start_urls = ['https://news.ycombinator.com/', 'https://news.ycombinator.com/news?p=2']
async def parse(self, res):
items = await HackerNewsItem.get_items(html=res.html)
for item in items:
async with aiofiles.open('./hacker_news.txt', 'a') as f:
await f.write(item.title + '\n')
if __name__ == '__main__':
HackerNewsSpider.start()
Run hacker_news_spider.py
:
[2018-07-11 17:50:12,430]-aspider-INFO Spider started!
[2018-07-11 17:50:12,430]-Request-INFO <GET: https://news.ycombinator.com/>
[2018-07-11 17:50:12,456]-Request-INFO <GET: https://news.ycombinator.com/news?p=2>
[2018-07-11 17:50:14,785]-aspider-INFO Time usage: 0:00:02.355062
[2018-07-11 17:50:14,785]-aspider-INFO Spider finished!
- Custom middleware
- JavaScript support
- Friendly response
- Pull Request
- Open Issue