Scrapy 爬取某网站图片

1. 创建一个 Scrapy 项目，在命令行或者 Pycharm 的 Terminal 中输入：

scrapy startproject imagepix

自动生成了下列文件：

2. 在 imagepixiv/spiders 文件夹下新建一个 imagepixiv.py 文件

3. imagepixiv.py 下的代码：

import scrapy
from urllib.parse import urlencode
import json
from ..items import ImagepixItem


class ImagepixivSpider(scrapy.Spider):
    name = 'imagepixiv'

    def start_requests(self):
        data = {'keyword': '风景'}
        base_url_1 = 'https://api.pixivic.com/illustrations?'
        for page in range(1, self.settings.get('MAX_PAGE') + 1):
            data['page'] = page
            params = urlencode(data)
            url_1 = base_url_1 + params
            yield scrapy.Request(url_1, callback=self.parse)

    def parse(self, response):
        result = json.loads(response.text)
        for image in result.get('data'):
            item = ImagepixItem()
            item['title'] = image.get('title')
            item['id'] = image.get('id')
            url = image.get('imageUrls')[0].get('large')
            url_rel = 'https://img.pixivic.com:23334/get/' + str(url)
            item['url'] = url_rel
            yield item

4. items.py 下的代码：

import scrapy
from scrapy import Field


class ImagepixItem(scrapy.Item):

    title = Field()
    id = Field()
    url = Field()

5. pipelines.py 下的代码：

   from scrapy import Request
   from scrapy.exceptions import DropItem
   from scrapy.pipelines.images import ImagesPipeline


   class ImagepixPipeline(ImagesPipeline):
       def file_path(self, request, response=None, info=None):
           url = request.url
           file_name = url.split('/')[-1]
           return file_name

       def item_completed(self, results, item, info):
           image_paths = [x['path'] for ok, x in results if ok]
           if not image_paths:
               raise DropItem('Image Downloaded Failed')
           return item

       def get_media_requests(self, item, info):
           yield Request(item['url'])

6. settings.py 下的代码：

BOT_NAME = 'imagepix'

SPIDER_MODULES = ['imagepix.spiders']
NEWSPIDER_MODULE = 'imagepix.spiders'
MAX_PAGE = 50
FEED_EXPORT_ENCODING = 'utf-8'
IMAGES_STORE = './images'
ITEM_PIPELINES = {
    'imagepix.pipelines.ImagepixPipeline': 300,
}
ROBOTSTXT_OBEY = False

7. 在命令行运行：

scrapy crawl imagepixiv

8. 结果：