31.網站數據監控-1

時間  2019-11-10
標籤 網站 數據 監控 欄目 網站開發 简体版
原文   原文鏈接 
網站數據監控：

思路：對網站數據字段監控並作MD5加密存入到數據，爲了後期監控數據是否更新做比對，而後郵件通知，存入四個字段。

引入的包：

md5_tools.py
# -*- coding:utf-8 -*-
import hashlib

# md5 加密
def md5_encode(md5):
    md5 = md5
    hash = hashlib.md5()
    hash.update(bytes(md5, encoding='utf-8'))  # 要對哪一個字符串進行加密，就放這裏
    return hash.hexdigest() # 拿到加密字符串
wenzhou.py

# -*- coding: utf-8 -*-
import scrapy
import time
import re
from WEB.conmon.md5_tool import md5_encode

from WEB.items import WebItem


class CompanyInfoSpider(scrapy.Spider):
    name = 'wenzhou'
    allowed_domains = ['wzszjw.wenzhou.gov.cn']
    start_urls = ['http://wzszjw.wenzhou.gov.cn/col/col1357901/index.html']
    custom_settings = {"DOWNLOAD_DELAY": 0.5,
                       "ITEM_PIPELINES":{'WEB.pipelines.MysqlPipeline': 320},
                       "DOWNLOADER_MIDDLEWARES": {
                           'WEB.middlewares.RandomUaseragentMiddleware': 500,
                       },
                       }

    def parse(self, response):

        #gbk解碼
        _response=response.text.encode('utf-8')
        # print(_response)
        # 轉碼
        _response=_response.decode('utf-8')
        texts=re.findall("<span>.*?</span><b>&middot;</b><a href=\'.*?\'",_response)
        str = ""
        for text in texts:
            str = str + "".join(text)
        # print(str)
        text_md5 = md5_encode(str)
        item = WebItem()
        item["website_name"] = "溫州市建設工程造價管理處"
        item["website_url"] = response.url
        item["content_md5"] = text_md5
        item["date_time"] = time.time()
        print(item)
        yield item
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 WebItem(scrapy.Item):
    # define the fields for your item here like:
    # name = scrapy.Field()
    content_md5 = scrapy.Field() # 監控文本
    website_url = scrapy.Field() # 採集頁面url
    website_name = scrapy.Field() # 網站名稱
    date_time = scrapy.Field() # 當前時間戳
piplines.py

# -*- coding: utf-8 -*-
from scrapy.conf import settings
import pymysql


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


# 數據保存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())):  # 第一個值爲sql語句第二個爲 值 爲一個元組
                print('數據入庫成功!')
                self.client.commit()
        except Exception as e:
            print(e)

            print('數據已存在，網站未更新!')
            self.client.rollback()
        return item

    def close_spider(self, spider):
        self.client.close()
setting.py

# -*- coding: utf-8 -*-

# Scrapy settings for WEB project
#
# For simplicity, this download 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 = 'WEB'

SPIDER_MODULES = ['WEB.spiders']
NEWSPIDER_MODULE = 'WEB.spiders'

# mysql配置參數
MYSQL_HOST = "172.16.0.55"
MYSQL_PORT = 3306
MYSQL_USER = "root"
MYSQL_PASSWORD = "concom603"
MYSQL_DB = 'web_page'
TABLE = "web_page_update"


# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'WEB (+http://www.yourdomain.com)'

# Obey robots.txt rules
ROBOTSTXT_OBEY = False

# 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 = {
#    'WEB.middlewares.WebSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
#DOWNLOADER_MIDDLEWARES = {
#    'WEB.middlewares.WebDownloaderMiddleware': 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 = {
#    'WEB.pipelines.WebPipeline': 300,
#}

# 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'
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
import random

from scrapy import signals


class WebSpiderMiddleware(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 WebDownloaderMiddleware(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)


# 隨機更換 USER_AGENT
class RandomUaseragentMiddleware(object):
    def __init__(self):
        self.user_agent = [
            "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.163 Safari/535.1",
            "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20100101 Firefox/6.0",
            "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50",
            "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.27 (KHTML, like Gecko) Chrome/12.0.712.0 Safari/534.27",
            "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/534.7 (KHTML, like Gecko) Chrome/7.0.514.0 Safari/534.7",
            "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6 GTB5",
            "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0 )",
            "HTC_Dream Mozilla/5.0 (Linux; U; Android 1.5; en-ca; Build/CUPCAKE) AppleWebKit/528.5  (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1",
            "Mozilla/5.0 (Linux; U; Android 2.3.6; en-us; Nexus S Build/GRK39F) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",
            "Mozilla/5.0 (Linux; U; Android 2.1; en-us; HTC Legend Build/cupcake) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17",
            "Mozilla/5.0 (Linux; U; Android 2.0; en-us; Milestone Build/ SHOLS_U2_01.03.1) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17",
            "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; TheWorld)",
            "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C)",
            "Opera/9.80 (Windows NT 5.1; U; zh-cn) Presto/2.9.168 Version/11.50"
        ]

    def process_request(self, request, spider):
        request.headers["User-Agent"] = random.choice(self.user_agent)
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