解决图片下载重命名保存本地,直接上代码（在原来代码做了一定的修改）。
总结：主要就是添加配置一个内置的函数，对保存的东西进行修改再存储，主要问题还是再piplines的设置里面。
效果如图：
hm5988.py
# -*- coding: utf-8 -*-
import scrapy
from hm5988_web.items import Hm5988WebItem
class Hm5988Spider(scrapy.Spider):
name = 'hm5988'
allowed_domains = ['www.hm5988.com']
start_urls = ['http://www.hm5988.com/goods/CATE0.html?page=1']
custom_settings = {
'DOWNLOAD_DELAY': 0.5,
"ITEM_PIPELINES": {
'hm5988_web.pipelines.ImagePipeline': 300,
'hm5988_web.pipelines.MysqlPipeline': 302,
},
"DOWNLOADER_MIDDLEWARES": {
'hm5988_web.middlewares.Hm5988WebDownloaderMiddleware': 500,
},
}
def parse(self, response):
# 获取页码
p_url = response.xpath("//li[@class='last']/a/@href").extract_first()
page_num = p_url.split('=')[1]
# print(page_num)
for i in range(2, int(page_num)+1):
url = 'http://www.hm5988.com/goods/CATE0.html?page={}'.format(i)
yield scrapy.Request(url=url, callback=self.parse_detail)
def parse_detail(self,response):
link_urls = response.xpath("//li[@class='mr10 mb20']/a/@href").extract()
for link_url in link_urls:
# print(link_url)
yield scrapy.Request(url=link_url, callback=self.parse_detail2)
def parse_detail2(self, response):
item = Hm5988WebItem()
# 所属分类
_type = response.xpath("//div[@class='current']/a[6]/text()").extract_first()
item['_type'] = _type
# 产品名称
name = response.xpath("//div[@class='txt-t fl']/li[@class='fs22 gc3 fw']/text()").extract_first()
item['name'] = name
# 详情图片
pic = response.xpath("//div[@class='pic-box fl p10']/img[@class='pic-big']/@src").extract_first()
item['pic'] = pic
yield item
print('*'*100)
items.py
# -*- coding: utf-8 -*-
# Define here the models for your scraped items
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/items.html
import scrapy
class Hm5988WebItem(scrapy.Item):
# define the fields for your item here like:
# name = scrapy.Field()
# 所属分类
_type = scrapy.Field()
# 产品名称
name = scrapy.Field()
# 详情图片
pic = scrapy.Field()
middlewares.py
# -*- coding: utf-8 -*-
# Define here the models for your spider middleware
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html
from scrapy import signals
class Hm5988WebSpiderMiddleware(object):
# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the spider middleware does not modify the
# passed objects.
@classmethod
def from_crawler(cls, crawler):
# This method is used by Scrapy to create your spiders.
s = cls()
crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
return s
def process_spider_input(self, response, spider):
# Called for each response that goes through the spider
# middleware and into the spider.
# Should return None or raise an exception.
return None
def process_spider_output(self, response, result, spider):
# Called with the results returned from the Spider, after
# it has processed the response.
# Must return an iterable of Request, dict or Item objects.
for i in result:
yield i
def process_spider_exception(self, response, exception, spider):
# Called when a spider or process_spider_input() method
# (from other spider middleware) raises an exception.
# Should return either None or an iterable of Response, dict
# or Item objects.
pass
def process_start_requests(self, start_requests, spider):
# Called with the start requests of the spider, and works
# similarly to the process_spider_output() method, except
# that it doesn’t have a response associated.
# Must return only requests (not items).
for r in start_requests:
yield r
def spider_opened(self, spider):
spider.logger.info('Spider opened: %s' % spider.name)
class Hm5988WebDownloaderMiddleware(object):
# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the downloader middleware does not modify the
# passed objects.
@classmethod
def from_crawler(cls, crawler):
# This method is used by Scrapy to create your spiders.
s = cls()
crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
return s
def process_request(self, request, spider):
# Called for each request that goes through the downloader
# middleware.
# Must either:
# - return None: continue processing this request
# - or return a Response object
# - or return a Request object
# - or raise IgnoreRequest: process_exception() methods of
# installed downloader middleware will be called
return None
def process_response(self, request, response, spider):
# Called with the response returned from the downloader.
# Must either;
# - return a Response object
# - return a Request object
# - or raise IgnoreRequest
return response
def process_exception(self, request, exception, spider):
# Called when a download handler or a process_request()
# (from other downloader middleware) raises an exception.
# Must either:
# - return None: continue processing this exception
# - return a Response object: stops process_exception() chain
# - return a Request object: stops process_exception() chain
pass
def spider_opened(self, spider):
spider.logger.info('Spider opened: %s' % spider.name)
piplines.py
# -*- coding: utf-8 -*-
# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://doc.scrapy.org/en/latest/topics/item-pipeline.html
from scrapy.conf import settings
from scrapy import Request
from scrapy.exceptions import DropItem
from scrapy.pipelines.images import ImagesPipeline
import pymysql
class Hm5988WebPipeline(object):
def process_item(self, item, spider):
return item
# 数据保存mysql
class MysqlPipeline(object):
def open_spider(self, spider):
self.host = settings.get('MYSQL_HOST')
self.port = settings.get('MYSQL_PORT')
self.user = settings.get('MYSQL_USER')
self.password = settings.get('MYSQL_PASSWORD')
self.db = settings.get(('MYSQL_DB'))
self.table = settings.get('TABLE')
self.client = pymysql.connect(host=self.host, user=self.user, password=self.password, port=self.port, db=self.db, charset='utf8')
def process_item(self, item, spider):
item_dict = dict(item)
cursor = self.client.cursor()
values = ','.join(['%s'] * len(item_dict))
keys = ','.join(item_dict.keys())
sql = 'INSERT INTO {table}({keys}) VALUES ({values})'.format(table=self.table, keys=keys, values=values)
try:
if cursor.execute(sql, tuple(item_dict.values())): # 第一个值为sql语句第二个为 值 为一个元组
print('数据入库成功!')
self.client.commit()
except Exception as e:
print(e)
self.client.rollback()
return item
def close_spider(self, spider):
self.client.close()
class ImagePipeline(ImagesPipeline):
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['pic'], meta={'item':item})
def file_path(self, request, response=None, info=None):
item = request.meta['item']
filename = u'full/{}.jpg'.format(item['name'])
return filename
settings.py
# -*- coding: utf-8 -*-
# Scrapy settings for hm5988_web project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
# https://doc.scrapy.org/en/latest/topics/settings.html
# https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html
BOT_NAME = 'hm5988_web'
SPIDER_MODULES = ['hm5988_web.spiders']
NEWSPIDER_MODULE = 'hm5988_web.spiders'
IMAGES_STORE = './images'
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'hm5988_web (+http://www.yourdomain.com)'
# Obey robots.txt rules
# Obey robots.txt rules
ROBOTSTXT_OBEY = False
# mysql配置参数
MYSQL_HOST = "172.16.10.157"
MYSQL_PORT = 3306
MYSQL_USER = "root"
MYSQL_PASSWORD = "123456"
MYSQL_DB = 'web_datas'
TABLE = "hm5988_2"
# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32
# Configure a delay for requests for the same website (default: 0)
# See https://doc.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16
# Disable cookies (enabled by default)
#COOKIES_ENABLED = False
# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False
# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
# 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
# 'Accept-Language': 'en',
#}
# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
# 'hm5988_web.middlewares.Hm5988WebSpiderMiddleware': 543,
#}
# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
DOWNLOADER_MIDDLEWARES = {
'hm5988_web.middlewares.Hm5988WebDownloaderMiddleware': 543,
}
# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
#}
# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
'hm5988_web.pipelines.ImagePipeline': 300,
'hm5988_web.pipelines.Hm5988WebPipeline': 302,
}
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False
# Enable and configure HTTP caching (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'