碎片图像spipeline警告：文件（未知错误）：从<GET下载图像时出错

Question

我正在学习Python和Scrapy，并学习如何使用它下载图像。我现在有点卡住了，我不知道真正的问题是什么。在

我运行蜘蛛时收到这个错误消息

<None>: Unsupported URL scheme '': no handler available for that scheme

以及

^{pr2}$

请看我的管道.py这里

import scrapy
from scrapy.contrib.pipeline.images import ImagesPipeline
from scrapy.exceptions import DropItem


class PriceoflipkartPipeline(object):
    def process_item(self, item, spider):
        return item

class MyImagesPipeline(ImagesPipeline):

def get_media_requests(self, item, info):
    for image_url in item['image_urls']:
        yield scrapy.Request(image_url)

def item_completed(self, results, item, info):
    image_paths = [x['path'] for ok, x in results if ok]
    if not image_paths:
        raise DropItem("Item contains no images")
    item['image_paths'] = image_paths
    return item

请看我的设置.py这里

SPIDER_MODULES = ['PriceoFlipkart.spiders']
NEWSPIDER_MODULE = 'PriceoFlipkart.spiders'
ITEM_PIPELINES = ['scrapy.contrib.pipeline.images.ImagesPipeline']
IMAGES_STORE = 'D:\PriceoFlipkart\Images'
IMAGES_EXPIRES = 90

请看我的蜘蛛

import scrapy
from PriceoFlipkart.items import PriceoflipkartItem

class FlipkartSpider(scrapy.Spider):
    name = "imageflip"
    allowed_domains = ["flipkart.com"]
     start_urls = [
    "http://www.flipkart.com/moto-g-2nd-gen/p/itme5z8n9mt77ajr?pid=MOBDYGZ6SHNB7RFC&srno=b_1&ref=06f4e48c-9548-45fa-b3ac-fa5fdf0e0d22"
]

def parse(self, response):
    for sel in response.xpath('//body'):
        item = PriceoflipkartItem()
        item['image_urls'] = sel.select('//img[@class="productImage  current"]').extract()
        yield item

在我的项目.py我添加了以下代码

image_urls = scrapy.Field()
images = scrapy.Field()

请告诉我如何正确配置，以便下载图像。我在Windows 8机器上。提前谢谢你。在

Answer 1

用于提取图像URL的XPath不正确，它应该在末尾包含/@src，以便只提取图像的URL。让它像：

item['image_urls'] = sel.select(
    '//img[@class="productImage  current"]/@src').extract()