scrapy----下载文件

1.qishu.py

# 需要下载的文件地址，需要是一个列表
# 如果不下载，只是将地址保存在数据库中，不需要设置列表
    qishu['download_url'] = [download_url]

2.在pipelines.py中自定义自己的pipeline

from scrapy.pipelines.files import FilesPipeline
from scrapy.http import Request
class QishuxiazaiPipeline(FilesPipeline):
    def get_media_requests(self, item, info):
        image_url = item['download_url'][0]
        yield Request(image_url, meta={'item': item})

    def file_path(self, request, response=None, info=None):
        item = request.meta['item']
        novel_name = item['download_url'][0].split('/')[-1]
        return '%s' % novel_name

    def item_completed(self, results, item, info):
        print(results)
        return item

3.在settings.py中开启自己的pipeline

ITEM_PIPELINES = {
  'Qishu.pipelines.QishuxiazaiPipeline': 3,
#如果采用自定义的CustomImagesPipeline，需要将自带的ImagesPipeline设置为None。
 'scrapy.pipelines.files.FilesPipeline':None
}
FILES_STORE = 'files'
FILES_URLS_FIELD = 'download_url'