Package: requests_spider
<div align=center><img src="./spider.png"></div>## 描述requests_spider 是一个轻量级的异步爬虫框架，基于requests_html进行二次开发，类似flask## 安装pip install requests_spider## 依赖python: > 3.6uvlooprequests_html## 用法##### 基础例子```python3import jsonfrom spider import XField, Spider, Model, Response, Requestclass Proxy(Model):ip = XField(rule='//tr[contains(@class, "odd")]/td[2]', first=False)port = XField(rule='//tr[contains(@class, "odd")]/td[3]', first=False)async def process(self, response: Response):with open('proxy1.txt', 'a+') as file:for result in self.merge():file.write(json.dumps(result) + '\n')spider = Spider('proxy', workers=15)spider.domains = ['www.xicidaili.com']spider.init_requests = [Request(url='http://www.xicidaili.com/nn/{}'.format(x), model=Proxy) for x in range(1, 10)]spider.async_limit = 5if __name__ == '__main__':spider.run()```爬取代理网站ip##### 中间组件```python3import randomimport refrom spider import Spider, Request, XRequest, Model, XField, RField, Response, Field, asyncio# 获取某个用户的所有的视频信息 ===> 获取aid / pagevideos_url = "https://space.bilibili.com/ajax/member/getSubmitVideos?mid={mid}" \"&pagesize=30&tid=0&page={page}&keyword=&order=pubdate"# 某个视频推荐的视频  ===> 获取aidrecommend_url = "https://comment.bilibili.com/playtag,{cid}-{aid}?html5=1"# 用户信息 post csrf/miduser_url = "https://space.bilibili.com/ajax/member/GetInfo"# av页面，====> 获取下载视频的url、cid-aid, midav_url = "https://www.bilibili.com/video/av{aid}"class AV(Model):urls = RField(rule='"url":"(.*?)","backup_url"', first=False)cid = RField(rule='cid=(.*?)&aid=')aid = RField(rule='&aid=(.*?)&pre_ad=')mid = RField(rule='"owner":{"mid":(.*?),')async def process(self, response: Response):print(self['urls'])print(self['cid'])print(self['aid'])print(self['mid'])print(self.json())if self['mid'] and self['aid'] and self['urls'] and self['cid']:# 推荐视频yield Request(url=recommend_url.format(cid=self['cid'], aid=self['aid']), model=Recommend)# 用户信息yield Request(url=user_url, method='POST', data={'csrf': '', 'mid': self['mid']},model=UserInfo, not_filter=True)# 下载视频for order, url in enumerate(self['urls']):yield Request(url=url.replace('http', 'https'),meta={'name': self['aid'] + '_' + str(order)}, model=Video)class UserInfo(Model):mid = Field()name = Field()sex = Field()rank = Field()face = Field()regtime = Field()birthday = Field()sign = Field()level_info = Field()async def process(self, response: Response):status = response.json().get('status')if status:data = response.json().get('data')for k in self.keys():if k in data:self[k] = data[k]with open('user_' + str(self['mid']) + '.txt', 'w') as f:f.write(self.dumps() + '\n')class Recommend(Model):async def process(self, response: Response):for data in response.json():yield Request(av_url.format(aid=data[1]), model=AV)class VideoInfo(Model):async def process(self, response: Response):status = response.json().get('status')if status:data = response.json().get('data')pattern = 'mid=(\d+?)&pagesize=30&tid=0&page=(\d+?)&keyword=&order=pubdate'patn = re.findall(pattern, response.url)[0]print(patn)yield Request(url=videos_url.format(mid=patn[0], page=int(patn[1]) + 1), model=VideoInfo),for v in data['vlist']:yield Request(url=av_url.format(aid=v.get('aid')), model=AV)class Video(Model):async def process(self, response: Response):file_name = response.current_request.meta.get('name')if file_name and response.status_code == 200:with open(file_name + '.mp4', 'wb') as f:for content in response.iter_content(chunk_size=512):f.write(content)f.flush()spider = Spider('bilibili', workers=5)spider.init_requests = [Request(url=videos_url.format(mid='35789774', page=1), model=VideoInfo),]spider.async_limit = 5@spider.Middleware('request')async def test(request):print(request.url)if request.url.startswith('https://space.bilibili.com/'):request.info.update({'headers': {'Referer': 'https://space.bilibili.com/'}})else:request.info.update({'headers': {'Referer': 'https://bilibili.com/'}})asyncio.sleep(round(random.random() * 5))return requestif __name__ == '__main__':spider.run()```爬取bilibili用户视频，用户资料，视频资料，利用中间组件进行切换headers## API#### Spider继承requests_html的HTMLSession- **Spider.async_limit**利用asyncio.Semaphore限制并发数量- **Spider.queue_timeout**从队列获取数据时候超时设置- **Spider.request_depth**请求的深度- **Spider.init_requests**初始化请求- **Spider.domains**爬取域名设置- **Spider.rules**从响应的数据中获取下次请求的信息，并加入队列- **Spider.Middleware**中间组件Middleware('request'), request入队之前执行，返回request, response, NoneMiddleware('response'), response入队之前，返回request, response, None##### ModelModel类似一个字典的数据模型- **Model.keys**类似字典的keys- **Model.values**类似字典的values- **Model.items**类似字典的items- **Model.json**获取所有Field的字典形式- **Model.dumps**获取所有的Field的字符串- **Model.merge**当所有的Field从响应数据获取的数据是列表的时候，将获取的列表合并成为json数据- **Model.process**处理响应数据##### Field- **Field**不处理或待处理数据项- **XField**利用xpath从响应数据中获取数据- **CField**利用css获取数据- **RField**利用正则获取数据##### Request- **Request**正常的请求- **XRequest**利用xpath, 用于Spider.rules- **RRequest**利用正则，用于Spider.rules## 例子examples目录下bilibili.py 爬取哔哩哔哩用户信息、视频信息和视频qidian.py 爬取起点小说月票排行包括评分proxy.py 爬取代理ip网站代理pearvideo.py 爬取梨视频网站的视频# LicenseMIT