From 9e9b442f3549bf156781397be9073faecbb4a632 Mon Sep 17 00:00:00 2001 From: henningxtro Date: Wed, 28 Apr 2021 22:24:13 +0200 Subject: [PATCH] BETTERZON-58: Basic Functionality with scrapy (#33) --- Crawler/crawler/__init__.py | 0 Crawler/crawler/items.py | 12 ++++ Crawler/crawler/middlewares.py | 103 ++++++++++++++++++++++++++++ Crawler/crawler/pipelines.py | 13 ++++ Crawler/crawler/settings.py | 88 ++++++++++++++++++++++++ Crawler/crawler/spiders/__init__.py | 4 ++ Crawler/crawler/spiders/amazon.py | 66 ++++++++++++++++++ Crawler/requirements.txt | 1 + Crawler/scrapy.cfg | 11 +++ 9 files changed, 298 insertions(+) create mode 100644 Crawler/crawler/__init__.py create mode 100644 Crawler/crawler/items.py create mode 100644 Crawler/crawler/middlewares.py create mode 100644 Crawler/crawler/pipelines.py create mode 100644 Crawler/crawler/settings.py create mode 100644 Crawler/crawler/spiders/__init__.py create mode 100644 Crawler/crawler/spiders/amazon.py create mode 100644 Crawler/scrapy.cfg diff --git a/Crawler/crawler/__init__.py b/Crawler/crawler/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/Crawler/crawler/items.py b/Crawler/crawler/items.py new file mode 100644 index 0000000..b3d39d6 --- /dev/null +++ b/Crawler/crawler/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 CrawlerItem(scrapy.Item): + # define the fields for your item here like: + # name = scrapy.Field() + pass diff --git a/Crawler/crawler/middlewares.py b/Crawler/crawler/middlewares.py new file mode 100644 index 0000000..356d29f --- /dev/null +++ b/Crawler/crawler/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 CrawlerSpiderMiddleware: + # 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 CrawlerDownloaderMiddleware: + # 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/Crawler/crawler/pipelines.py b/Crawler/crawler/pipelines.py new file mode 100644 index 0000000..e3aa1dc --- /dev/null +++ b/Crawler/crawler/pipelines.py @@ -0,0 +1,13 @@ +# 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 itemadapter import ItemAdapter + + +class CrawlerPipeline: + def process_item(self, item, spider): + return item diff --git a/Crawler/crawler/settings.py b/Crawler/crawler/settings.py new file mode 100644 index 0000000..31260f0 --- /dev/null +++ b/Crawler/crawler/settings.py @@ -0,0 +1,88 @@ +# Scrapy settings for crawler 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 = 'crawler' + +SPIDER_MODULES = ['crawler.spiders'] +NEWSPIDER_MODULE = 'crawler.spiders' + + +# Crawl responsibly by identifying yourself (and your website) on the user-agent +USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36' + +# 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://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 = 1 + +# 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 = { +# 'crawler.middlewares.CrawlerSpiderMiddleware': 543, +#} + +# Enable or disable downloader middlewares +# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html +#DOWNLOADER_MIDDLEWARES = { +# 'crawler.middlewares.CrawlerDownloaderMiddleware': 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 = { +# 'crawler.pipelines.CrawlerPipeline': 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' diff --git a/Crawler/crawler/spiders/__init__.py b/Crawler/crawler/spiders/__init__.py new file mode 100644 index 0000000..ebd689a --- /dev/null +++ b/Crawler/crawler/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/Crawler/crawler/spiders/amazon.py b/Crawler/crawler/spiders/amazon.py new file mode 100644 index 0000000..12ea3d5 --- /dev/null +++ b/Crawler/crawler/spiders/amazon.py @@ -0,0 +1,66 @@ +# -*- coding: utf-8 -*- +import scrapy +from urllib.parse import urlencode +from urllib.parse import urljoin +import re +import json + +queries = ['iphone'] +API = '' + + +def get_url(url): + payload = {'api_key': API, 'url': url, 'country_code': 'us'} + proxy_url = 'http://api.scraperapi.com/?' + urlencode(payload) + return proxy_url + + +class AmazonSpider(scrapy.Spider): + name = 'amazon' + + def start_requests(self): + for query in queries: + url = 'https://www.amazon.de/s?' + urlencode({'k': query}) + yield scrapy.Request(url=url, callback=self.parse_keyword_response) + + def parse_keyword_response(self, response): + products = response.xpath('//*[@data-asin]') + + for product in products: + asin = product.xpath('@data-asin').extract_first() + product_url = f"https://www.amazon.de/dp/{asin}" + yield scrapy.Request(url=product_url, callback=self.parse_product_page, meta={'asin': asin}) + + next_page = response.xpath('//li[@class="a-last"]/a/@href').extract_first() + if next_page: + url = urljoin("https://www.amazon.de", next_page) + yield scrapy.Request(url=url, callback=self.parse_keyword_response) + + def parse_product_page(self, response): + asin = response.meta['asin'] + title = response.xpath('//*[@id="productTitle"]/text()').extract_first() + image = re.search('"large":"(.*?)"', response.text).groups()[0] + rating = response.xpath('//*[@id="acrPopover"]/@title').extract_first() + number_of_reviews = response.xpath('//*[@id="acrCustomerReviewText"]/text()').extract_first() + price = response.xpath('//*[@id="priceblock_ourprice"]/text()').extract_first() + + if not price: + price = response.xpath('//*[@data-asin-price]/@data-asin-price').extract_first() or \ + response.xpath('//*[@id="price_inside_buybox"]/text()').extract_first() + + temp = response.xpath('//*[@id="twister"]') + sizes = [] + colors = [] + if temp: + s = re.search('"variationValues" : ({.*})', response.text).groups()[0] + json_acceptable = s.replace("'", "\"") + di = json.loads(json_acceptable) + sizes = di.get('size_name', []) + colors = di.get('color_name', []) + + bullet_points = response.xpath('//*[@id="feature-bullets"]//li/span/text()').extract() + seller_rank = response.xpath( + '//*[text()="Amazon Best Sellers Rank:"]/parent::*//text()[not(parent::style)]').extract() + yield {'asin': asin, 'Title': title, 'MainImage': image, 'Rating': rating, 'NumberOfReviews': number_of_reviews, + 'Price': price, 'AvailableSizes': sizes, 'AvailableColors': colors, 'BulletPoints': bullet_points, + 'SellerRank': seller_rank} diff --git a/Crawler/requirements.txt b/Crawler/requirements.txt index 0b9c558..ba99df1 100644 --- a/Crawler/requirements.txt +++ b/Crawler/requirements.txt @@ -2,3 +2,4 @@ pymysql flask flask-sqlalchemy flask_restful +scrapy \ No newline at end of file diff --git a/Crawler/scrapy.cfg b/Crawler/scrapy.cfg new file mode 100644 index 0000000..83a4eef --- /dev/null +++ b/Crawler/scrapy.cfg @@ -0,0 +1,11 @@ +# Automatically created by: scrapy startproject +# +# For more information about the [deploy] section see: +# https://scrapyd.readthedocs.io/en/latest/deploy.html + +[settings] +default = crawler.settings + +[deploy] +#url = http://localhost:6800/ +project = crawler