ruia-pyppeteer 0.0.3

ruia_pyppeteer - A Ruia plugin for loading javascript - pyppeteer.

## ruia-pyppeteer

A [Ruia](https://github.com/howie6879/ruia) plugin for loading javascript

> Notice: Works on ruia >= 0.0.3

### Installation

```shell
pip install ruia_pyppeteer
# New features
pip install git+https://github.com/ruia-plugins/ruia-pyppeteer
```

### Usage

`ruia_pyppeteer` will load js by using pyppeteer.

You need to pay attention when you use load_js, it will download a recent version of Chromium (~100MB). This only happens once.

**Load JavaScript**

```python
import asyncio

from ruia_pyppeteer import PyppeteerRequest as Request

request = Request("https://www.jianshu.com/", load_js=True)
response = asyncio.get_event_loop().run_until_complete(request.fetch())
print(response.html)
```

**Complete example**

```python
from ruia import AttrField, TextField, Item

from ruia_pyppeteer import PyppeteerSpider as Spider
from ruia_pyppeteer import PyppeteerRequest as Request


class JianshuItem(Item):
target_item = TextField(css_select='ul.list>li')
author_name = TextField(css_select='a.name')
author_url = AttrField(attr='href', css_select='a.name')

async def clean_author_url(self, author_url):
return f"https://www.jianshu.com{author_url}"


class JianshuSpider(Spider):
start_urls = ['https://www.jianshu.com/']
concurrency = 10
# Load js on the first request
load_js = True

async def parse(self, res):
items = await JianshuItem.get_items(html=res.html)
for item in items:
print(item)
# Loading js by using PyppeteerRequest
yield Request(url=items[0].author_url, load_js=self.load_js, callback=self.parse_item)

async def parse_item(self, res):
print(res)


if __name__ == '__main__':
JianshuSpider.start()
```

Enjoy it :)