From acea803d8fc76e6a5f110e97f284bf225d67083b Mon Sep 17 00:00:00 2001 From: caoqianming Date: Mon, 10 Apr 2023 14:16:16 +0800 Subject: [PATCH] first commit --- .gitignore | 4 ++ note.txt | 1 + requirements.txt | 3 + scrapy.cfg | 14 +++++ zcspider/__init__.py | 0 zcspider/items.py | 12 ++++ zcspider/middlewares.py | 103 +++++++++++++++++++++++++++++++++++ zcspider/pipelines.py | 45 +++++++++++++++ zcspider/settings.py | 97 +++++++++++++++++++++++++++++++++ zcspider/spiders/__init__.py | 4 ++ zcspider/spiders/base.py | 33 +++++++++++ 11 files changed, 316 insertions(+) create mode 100644 .gitignore create mode 100644 note.txt create mode 100644 requirements.txt create mode 100644 scrapy.cfg create mode 100644 zcspider/__init__.py create mode 100644 zcspider/items.py create mode 100644 zcspider/middlewares.py create mode 100644 zcspider/pipelines.py create mode 100644 zcspider/settings.py create mode 100644 zcspider/spiders/__init__.py create mode 100644 zcspider/spiders/base.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b32a1a3 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +dbs/* +venv/* +__pycache__/ +*.pyc \ No newline at end of file diff --git a/note.txt b/note.txt new file mode 100644 index 0000000..e78fca5 --- /dev/null +++ b/note.txt @@ -0,0 +1 @@ +scrapy crawl basespider -a start_url=http://ctc.ac.cn/ \ No newline at end of file diff --git a/requirements.txt b/requirements.txt new file mode 100644 index 0000000..0f103ee --- /dev/null +++ b/requirements.txt @@ -0,0 +1,3 @@ +scrapy==2.8.0 +scrapyd==1.4.1 +scrapyd-client==1.2.3 \ No newline at end of file diff --git a/scrapy.cfg b/scrapy.cfg new file mode 100644 index 0000000..a581407 --- /dev/null +++ b/scrapy.cfg @@ -0,0 +1,14 @@ +# Automatically created by: scrapy startproject +# +# For more information about the [deploy] section see: +# https://scrapyd.readthedocs.io/en/latest/deploy.html + +[settings] +default = zcspider.settings + +[scrapyd] +bind_address = 0.0.0.0 + +[deploy zc1] +# url = http://localhost:6800/ +project = zcspider diff --git a/zcspider/__init__.py b/zcspider/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/zcspider/items.py b/zcspider/items.py new file mode 100644 index 0000000..02d1c68 --- /dev/null +++ b/zcspider/items.py @@ -0,0 +1,12 @@ +# Define here the models for your scraped items +# +# See documentation in: +# https://docs.scrapy.org/en/latest/topics/items.html + +import scrapy + + +class ZcspiderItem(scrapy.Item): + # define the fields for your item here like: + # name = scrapy.Field() + pass diff --git a/zcspider/middlewares.py b/zcspider/middlewares.py new file mode 100644 index 0000000..139f8ab --- /dev/null +++ b/zcspider/middlewares.py @@ -0,0 +1,103 @@ +# Define here the models for your spider middleware +# +# See documentation in: +# https://docs.scrapy.org/en/latest/topics/spider-middleware.html + +from scrapy import signals + +# useful for handling different item types with a single interface +from itemadapter import is_item, ItemAdapter + + +class ZcspiderSpiderMiddleware: + # 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, 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 Request 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 ZcspiderDownloaderMiddleware: + # 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) diff --git a/zcspider/pipelines.py b/zcspider/pipelines.py new file mode 100644 index 0000000..ae92c10 --- /dev/null +++ b/zcspider/pipelines.py @@ -0,0 +1,45 @@ +# Define your item pipelines here +# +# Don't forget to add your pipeline to the ITEM_PIPELINES setting +# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html + + +# useful for handling different item types with a single interface +from scrapy.exceptions import IgnoreRequest +import psycopg2 + +class ZcspiderPipeline: + + def open_spider(self, spider): + print('初始化数据库连接') + self.conn = psycopg2.connect(host="49.232.14.174",database="zcspider", user="postgres", password="zcDsj2021") + self.cur = self.conn.cursor() + self.cur.execute("delete from content where domain = %s", (spider.domain, )) + # rows = self.cur.fetchall() + # spider.visited_urls_last = [i[0] for i in rows] if len(rows)>1 else [] + + # def process_request(self, request, spider): + # print('检查当前地址有没有存储过') + # self.cur.execute("SELECT url from content where url= %s", request.url) + # row = self.cur.fetchone() is not None + # print(row) + # if row: + # raise IgnoreRequest(f"Duplicate URL found: {request.url}") + # return request + + def process_item(self, item, spider): + try: + self.cur.execute("INSERT INTO content (domain, url, text) VALUES(%s, %s, %s)", + (item['domain'], item['url'], item['text'])) + self.conn.commit() + except: + self.conn.rollback() + raise + return item + + # 结束,关闭连接 + def close_spider(self, spider): + # 关闭游标 + self.cur.close() + # 关闭连接 + self.conn.close() \ No newline at end of file diff --git a/zcspider/settings.py b/zcspider/settings.py new file mode 100644 index 0000000..383e700 --- /dev/null +++ b/zcspider/settings.py @@ -0,0 +1,97 @@ +# Scrapy settings for zcspider project +# +# For simplicity, this file contains only settings considered important or +# commonly used. You can find more settings consulting the documentation: +# +# https://docs.scrapy.org/en/latest/topics/settings.html +# https://docs.scrapy.org/en/latest/topics/downloader-middleware.html +# https://docs.scrapy.org/en/latest/topics/spider-middleware.html + +BOT_NAME = "zcspider" + +SPIDER_MODULES = ["zcspider.spiders"] +NEWSPIDER_MODULE = "zcspider.spiders" + + +# Crawl responsibly by identifying yourself (and your website) on the user-agent +#USER_AGENT = "zcspider (+http://www.yourdomain.com)" + +# Obey robots.txt rules +ROBOTSTXT_OBEY = True + +# 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://docs.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://docs.scrapy.org/en/latest/topics/spider-middleware.html +#SPIDER_MIDDLEWARES = { +# "zcspider.middlewares.ZcspiderSpiderMiddleware": 543, +#} + +# Enable or disable downloader middlewares +# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html +#DOWNLOADER_MIDDLEWARES = { +# "zcspider.middlewares.ZcspiderDownloaderMiddleware": 543, +#} + +# Enable or disable extensions +# See https://docs.scrapy.org/en/latest/topics/extensions.html +#EXTENSIONS = { +# "scrapy.extensions.telnet.TelnetConsole": None, +#} + +# Configure item pipelines +# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html +#ITEM_PIPELINES = { +# "zcspider.pipelines.ZcspiderPipeline": 300, +#} + +# Enable and configure the AutoThrottle extension (disabled by default) +# See https://docs.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://docs.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" + +# Set settings whose default value is deprecated to a future-proof value +REQUEST_FINGERPRINTER_IMPLEMENTATION = "2.7" +TWISTED_REACTOR = "twisted.internet.asyncioreactor.AsyncioSelectorReactor" +FEED_EXPORT_ENCODING = "utf-8" + +ITEM_PIPELINES = { + 'zcspider.pipelines.ZcspiderPipeline': 300, +} diff --git a/zcspider/spiders/__init__.py b/zcspider/spiders/__init__.py new file mode 100644 index 0000000..ebd689a --- /dev/null +++ b/zcspider/spiders/__init__.py @@ -0,0 +1,4 @@ +# This package will contain the spiders of your Scrapy project +# +# Please refer to the documentation for information on how to create and manage +# your spiders. diff --git a/zcspider/spiders/base.py b/zcspider/spiders/base.py new file mode 100644 index 0000000..fd9c75c --- /dev/null +++ b/zcspider/spiders/base.py @@ -0,0 +1,33 @@ +import scrapy +from urllib.parse import urlparse +import html2text + +class BaseSpider(scrapy.Spider): + name = "basespider" + start_urls = ["http://ctc.ac.cn/"] + visited_urls = set() + + def __init__(self, start_url: str, name=None, **kwargs): + super().__init__(name, **kwargs) + self.domain = urlparse(start_url).netloc + self.start_urls = [start_url] + self.ext = tuple(['.png', '.jpg', '.pdf', '.doc', '.docx', '.xls', '.xlsx', '.ppt', '.pptx']) + + def parse(self, response): + self.visited_urls.add(response.url) + h = html2text.HTML2Text() + h.ignore_links = True # 忽略所有链接 + # 提取纯文本内容 + text = h.handle(response.body.decode()) + + yield { + 'domain': self.domain, + 'url': response.url, + 'text': text, + } + + for link in response.css("a::attr('href')").getall(): + if link not in self.visited_urls: + if link.startswith("/") or urlparse(link).netloc == self.domain: + if not link.endswith(self.ext): + yield scrapy.Request(response.urljoin(link), callback=self.parse) \ No newline at end of file