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https://github.com/howie6879/talospider
talospider - A simple,lightweight scraping micro-framework
https://github.com/howie6879/talospider
crawler crawling python spider web-spider
Last synced: 15 days ago
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talospider - A simple,lightweight scraping micro-framework
- Host: GitHub
- URL: https://github.com/howie6879/talospider
- Owner: howie6879
- Created: 2017-06-03T03:04:28.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2019-02-22T06:55:48.000Z (over 5 years ago)
- Last Synced: 2024-10-14T09:25:23.205Z (22 days ago)
- Topics: crawler, crawling, python, spider, web-spider
- Language: Python
- Homepage:
- Size: 174 KB
- Stars: 54
- Watchers: 6
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## talospider
 [](https://pypi.python.org/pypi/talospider/)
### 1.为什么写这个？
> 一些简单的页面，无需用比较大的框架来进行爬取，自己纯手写又比较麻烦，适用于单页面的爬虫编写
>
> 微爬虫框架 - 小巧、方便、练手学习
因此针对这个需求写了`talospider`:
- 1.针对单页面的item提取 - 具体介绍点[这里](./docs/item.md)
- 2.spider模块 - 具体介绍点[这里](./docs/spider.md)
**注意：此项目已经废弃，有需求请大家转用我新编写的异步框架[ruia](https://github.com/howie6879/ruia)**
### 2.介绍&&使用
#### 使用
```shell
pip install talospider
```
#### 2.1.item
这个模块是可以独立使用的，对于一些请求比较简单的网站（比如只需要`get`请求），单单只用这个模块就可以快速地编写出你想要的爬虫，比如(以下使用python3，python2见examples目录)：
##### 2.1.1.单页面单目标
比如要获取这个网址http://book.qidian.com/info/1004608738 的书籍信息，封面等信息，可直接这样写：
```python
import time
from pprint import pprint
from talospider import Item, TextField, AttrField
class QidianSpider(Item):
title = TextField(css_select='.book-info>h1>em')
author = TextField(css_select='a.writer')
cover = AttrField(css_select='a#bookImg>img', attr='src')
def tal_title(self, title):
return title
def tal_cover(self, cover):
return 'http:' + cover
if __name__ == '__main__':
item_data = QidianSpider.get_item(url='http://book.qidian.com/info/1004608738')
pprint(item_data)
```
具体见[qidian_details_by_item.py](./examples/qidian_details_by_item.py)
##### 2.1.1.单页面多目标
比如获取[豆瓣250电影]([https://movie.douban.com/top250](https://movie.douban.com/top250))首页展示的25部电影，这一个页面有25个目标，可直接这样写：
```python
from pprint import pprint
from talospider import Item, TextField, AttrField
class DoubanSpider(Item):
# 定义继承自item的Item类
target_item = TextField(css_select='div.item')
title = TextField(css_select='span.title')
cover = AttrField(css_select='div.pic>a>img', attr='src')
abstract = TextField(css_select='span.inq')
def tal_title(self, title):
if isinstance(title, str):
return title
else:
return ''.join([i.text.strip().replace('\xa0', '') for i in title])
if __name__ == '__main__':
items_data = DoubanSpider.get_items(url='https://movie.douban.com/top250')
result = []
for item in items_data:
result.append({
'title': item.title,
'cover': item.cover,
'abstract': item.abstract,
})
pprint(result)
```
具体见[douban_page_by_item.py](./examples/douban_page_by_item.py)
#### 2.2.spider
当需要爬取有层次的页面时，比如爬取豆瓣250全部电影，这时候`spider`部分就派上了用场：
```python
# !/usr/bin/env python
from talospider import AttrField, Request,Spider, Item, TextField
from talospider.utils import get_random_user_agent
class DoubanItem(Item):
# 定义继承自item的Item类
target_item = TextField(css_select='div.item')
title = TextField(css_select='span.title')
cover = AttrField(css_select='div.pic>a>img', attr='src')
abstract = TextField(css_select='span.inq')
def tal_title(self, title):
if isinstance(title, str):
return title
else:
return ''.join([i.text.strip().replace('\xa0', '') for i in title])
class DoubanSpider(Spider):
# 定义起始url，必须
start_urls = ['https://movie.douban.com/top250']
# requests配置
request_config = {
'RETRIES': 3,
'DELAY': 0,
'TIMEOUT': 20
}
def parse(self, res):
# 解析函数 必须有
# 将html转化为etree
etree = self.e_html(res.html)
# 提取目标值生成新的url
pages = [i.get('href') for i in etree.cssselect('.paginator>a')]
pages.insert(0, '?start=0&filter=')
headers = {
"User-Agent": get_random_user_agent()
}
for page in pages:
url = self.start_urls[0] + page
yield Request(url, request_config=self.request_config, headers=headers, callback=self.parse_item)
def parse_item(self, res):
items_data = DoubanItem.get_items(html=res.html)
# result = []
for item in items_data:
# result.append({
# 'title': item.title,
# 'cover': item.cover,
# 'abstract': item.abstract,
# })
# 保存
with open('douban250.txt', 'a+') as f:
f.writelines(item.title + '\n')
if __name__ == '__main__':
DoubanSpider.start()
```
控制台：
```shell
2018-01-02 09:33:34 - [talospider ]: talospider started
2018-01-02 09:33:35 - [downloading]: GET: https://movie.douban.com/top250
2018-01-02 09:33:35 - [downloading]: GET: https://movie.douban.com/top250?start=0&filter=
2018-01-02 09:33:35 - [downloading]: GET: https://movie.douban.com/top250?start=25&filter=
2018-01-02 09:33:36 - [downloading]: GET: https://movie.douban.com/top250?start=50&filter=
2018-01-02 09:33:36 - [downloading]: GET: https://movie.douban.com/top250?start=75&filter=
2018-01-02 09:33:36 - [downloading]: GET: https://movie.douban.com/top250?start=100&filter=
2018-01-02 09:33:37 - [downloading]: GET: https://movie.douban.com/top250?start=125&filter=
2018-01-02 09:33:37 - [downloading]: GET: https://movie.douban.com/top250?start=150&filter=
2018-01-02 09:33:37 - [downloading]: GET: https://movie.douban.com/top250?start=175&filter=
2018-01-02 09:33:37 - [downloading]: GET: https://movie.douban.com/top250?start=200&filter=
2018-01-02 09:33:38 - [downloading]: GET: https://movie.douban.com/top250?start=225&filter=
2018-01-02 09:33:38 - [talospider ]: Time usage：0:00:03.367604
```
此时当前目录会生成`douban250.txt`，具体见[douban_page_by_spider.py](./examples/douban_page_by_spider.py)。
### 3.说明
学习之作，待完善的地方还有很多
由`talospider`编写的示例：
- [百度图片爬虫 ](https://github.com/howie6879/spider/blob/master/baidu_img/bd_img.py)
- [百度贴吧图片爬虫](https://github.com/howie6879/spider/blob/master/baidu_img/tieba_img.py)
- [起点小说信息以及榜单爬虫](https://github.com/howie6879/spider/tree/master/qidian)
- [豆瓣250](https://github.com/howie6879/spider/tree/master/douban250)