2024年最新scrapy初步-简单静态爬虫(爬取电影天堂所有电影)

def init(self):

self.client = pymongo.MongoClient() #构建mongodb客户端

def process_item(self, item, spider):

if item:

print(“is saveing a move %s”%item.name)

dic_item = dict(item) #将数据类转化为能存储的字典

result = self.client.moves.ygdy.find_one({“name”:item[“name”]}) #查询数据库中是否存在此数据

if result == None:

self.client.moves.ygdy.insert(dic_item)

else:

print(“one move is in document document”)

pipelines需要在settings.py中注册,详见后面的seetings.py

• middlewares.py

-- coding: utf-8 --

Define here the models for your spider middleware

See documentation in:

http://doc.scrapy.org/en/latest/topics/spider-middleware.html

from scrapy import signals

from scrapy.downloadermiddlewares.useragent import UserAgentMiddleware

import random

class MyUserAgentMiddleware(UserAgentMiddleware):

‘’’

设置User-Agent

‘’’

def init(self, user_agent):

self.user_agent = user_agent

@classmethod

def from_crawler(cls, crawler):

return cls(

user_agent=crawler.settings.get(‘MY_USER_AGENT’)

)

def process_request(self, request, spider):

agent = random.choice(self.user_agent)

request.headers[‘User-Agent’] = agent

用于在request中添加随机user-agent

• settings.py

-- coding: utf-8 --

Scrapy settings for DyttSpider project

For simplicity, this file contains only settings considered important or

commonly used. You can find more settings consulting the documentation:

http://doc.scrapy.org/en/latest/topics/settings.html

http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html

http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html

BOT_NAME = ‘DyttSpider’

SPIDER_MODULES = [‘DyttSpider.spiders’]

NEWSPIDER_MODULE = ‘DyttSpider.spiders’

COOKIES_ENABLES=False

Crawl responsibly by identifying yourself (and your website) on the user-agent

#USER_AGENT = ‘DyttSpider (+http://www.yourdomain.com)’

Obey robots.txt rules

ROBOTSTXT_OBEY = False

DOWNLOADER_MIDDLEWARES={

‘scrapy.downloadermiddlewares.useragent.UserAgentMiddleware’:None,

‘DyttSpider.middlewares.MyUserAgentMiddleware’:400,

}

ITEM_PIPELINES = {“DyttSpider.pipelines.DyttspiderPipeline”:300}

MY_USER_AGENT = [

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; AcooBrowser; .NET CLR 1.1.4322; .NET CLR 2.0.50727)”,

“Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Acoo Browser; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)”,

“Mozilla/4.0 (compatible; MSIE 7.0; AOL 9.5; AOLBuild 4337.35; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)”,

“Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)”,

“Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)”,

“Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)”,

“Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)”,

“Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)”,

“Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6”,

“Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1”,

“Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0”,

“Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5”,

“Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko Fedora/1.9.0.8-1.fc10 Kazehakase/0.5.6”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11”,

“Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.20 (KHTML, like Gecko) Chrome/19.0.1036.7 Safari/535.20”,

“Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; fr) Presto/2.9.168 Version/11.52”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.11 TaoBrowser/2.0 Safari/536.11”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.71 Safari/537.1 LBBROWSER”,

“Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; LBBROWSER)”,

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E; LBBROWSER)”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.84 Safari/535.11 LBBROWSER”,

“Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)”,

“Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; QQBrowser/7.0.3698.400)”,

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E)”,

“Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SV1; QQDownload 732; .NET4.0C; .NET4.0E; 360SE)”,

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; QQDownload 732; .NET4.0C; .NET4.0E)”,

“Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)”,

“Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1”,

“Mozilla/5.0 (iPad; U; CPU OS 4_2_1 like Mac OS X; zh-cn) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5”,

“Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:2.0b13pre) Gecko/20110307 Firefox/4.0b13pre”,

“Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:16.0) Gecko/20100101 Firefox/16.0”,

“Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11”,

“Mozilla/5.0 (X11; U; Linux x86_64; zh-CN; rv:1.9.2.10) Gecko/20100922 Ubuntu/10.10 (maverick) Firefox/3.6.10”,

“Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36”,]

Configure maximum concurrent requests performed by Scrapy (default: 16)

#CONCURRENT_REQUESTS = 32

Configure a delay for requests for the same website (default: 0)

See http://scrapy.readthedocs.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 http://scrapy.readthedocs.org/en/latest/topics/spider-middleware.html

#SPIDER_MIDDLEWARES = {

‘DyttSpider.middlewares.DyttspiderSpiderMiddleware’: 543,

#}

Enable or disable downloader middlewares

See http://scrapy.readthedocs.org/en/latest/topics/downloader-middleware.html

#DOWNLOADER_MIDDLEWARES = {

‘DyttSpider.middlewares.MyCustomDownloaderMiddleware’: 543,

#}

Enable or disable extensions

See http://scrapy.readthedocs.org/en/latest/topics/extensions.html

#EXTENSIONS = {

‘scrapy.extensions.telnet.TelnetConsole’: None,

#}

Configure item pipelines

See http://scrapy.readthedocs.org/en/latest/topics/item-pipeline.html

#ITEM_PIPELINES = {

‘DyttSpider.pipelines.DyttspiderPipeline’: 300,

#}

Enable and configure the AutoThrottle extension (disabled by default)

See http://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)

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