在不重写file\u path函数的情况下,spider下载所有带有默认“request URL hash”文件名的图像。然而,当我试图覆盖的功能,它只是不工作。默认输出属性images中没有任何内容。你知道吗
我尝试了IMAGES\u STORE变量的相对路径和绝对路径设置.py以及文件路径函数都没有用。即使我用完全相同的默认文件路径函数覆盖文件路径函数,图像也不会下载。你知道吗
任何帮助都将不胜感激!你知道吗
你知道吗设置.py你知道吗
BOT_NAME = 'HomeApp2'
SPIDER_MODULES = ['HomeApp2.spiders']
NEWSPIDER_MODULE = 'HomeApp2.spiders'
USER_AGENT = 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.93 Safari/537.36'
# ScrapySplash settings
SPLASH_URL = 'http://192.168.99.100:8050'
DOWNLOADER_MIDDLEWARES = {
'scrapy_splash.SplashCookiesMiddleware': 723,
'scrapy_splash.SplashMiddleware': 725,
'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810,
}
SPIDER_MIDDLEWARES = {
'scrapy_splash.SplashDeduplicateArgsMiddleware': 100,
}
DUPEFILTER_CLASS = 'scrapy_splash.SplashAwareDupeFilter'
HTTPCACHE_STORAGE = 'scrapy_splash.SplashAwareFSCacheStorage'
# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
'HomeApp2.pipelines.DuplicatesPipeline': 250,
'HomeApp2.pipelines.ProcessImagesPipeline': 251,
'HomeApp2.pipelines.HomeApp2Pipeline': 300,
}
IMAGES_STORE = 'files'
你知道吗管道.py你知道吗
import json
import scrapy
from scrapy.exceptions import DropItem
from scrapy.pipelines.images import ImagesPipeline
class DuplicatesPipeline(object):
def __init__(self):
self.sku_seen = set()
def process_item(self, item, spider):
if item['sku'] in self.sku_seen:
raise DropItem("Repeated item found: %s" % item)
else:
self.sku_seen.add(item['sku'])
return item
class ProcessImagesPipeline(ImagesPipeline):
'''
def file_path(self, request):
print('!!!!!!!!!!!!!!!!!!!!!!!!!')
sku = request.meta['sku']
num = request.meta['num']
return '%s/%s.jpg' % (sku, num)
'''
def get_media_requests(self, item, info):
print('- - - - - - - - - - - - - - - - - -')
sku = item['sku']
for num, image_url in item['image_urls'].items():
yield scrapy.Request(url=image_url, meta = {'sku': sku,
'num': num})
class HomeApp2Pipeline(object):
def __init__(self):
self.file = open('items.jl', 'w')
def process_item(self, item, spider):
line = json.dumps(dict(item)) + '\n'
self.file.write(line)
return item
附件2.py
import scrapy
from scrapy_splash import SplashRequest
from HomeApp2.items import HomeAppItem
class AppScrape2Spider(scrapy.Spider):
name = 'AppScrape2'
def start_requests(self):
yield SplashRequest(
url = 'https://www.appliancesonline.com.au/product/samsung-sr400lstc-400l-top-mount-fridge?sli_sku_jump=1',
callback = self.parse,
)
def parse(self, response):
item = HomeAppItem()
product = response.css('aol-breadcrumbs li:nth-last-of-type(1) .breadcrumb-link ::text').extract_first().rsplit(' ', 1)
if product is None:
return {}
item['sku'] = product[-1]
item['image_urls'] = {}
root_url = 'https://www.appliancesonline.com.au'
product_picture_count = 0
for pic in response.css('aol-product-media-gallery-main-image-portal img.image'):
product_picture_count = product_picture_count + 1
item['image_urls']['p'+str(product_picture_count)] = (
root_url + pic.css('::attr(src)').extract_first())
feature_count = 0
for feat in response.css('aol-product-features .feature'):
feature_count = feature_count + 1
item['image_urls']['f'+str(feature_count)] = (
root_url + feat.css('.feature-image ::attr(src)').extract_first())
yield item
你知道吗项目.py你知道吗
import scrapy
class HomeAppItem(scrapy.Item):
# define the fields for your item here like:
# name = scrapy.Field()
sku = scrapy.Field()
image_urls = scrapy.Field()
images = scrapy.Field()
pass
经过反复试验,我找到了解决办法。它只是将其余的参数添加到文件路径方法中。你知道吗
改变
至
我的原始代码似乎错误地重写了该方法,导致对该方法的调用失败。你知道吗
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