Lesson6

avito_parse/items.py

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+# Define here the models for your scraped items
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/items.html
+
+import scrapy
+
+
+class AvitoParseItem(scrapy.Item):
+    # define the fields for your item here like:
+    # name = scrapy.Field()
+    pass

avito_parse/loaders.py

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+# from scrapy import Selector
+from scrapy.loader import ItemLoader
+from itemloaders.processors import TakeFirst, MapCompose, Compose
+from urllib.parse import urljoin
+
+
+def get_url(itm):
+    return urljoin("https://www.avito.ru", itm)
+
+
+def get_price(itm):
+    itm = itm.replace(" ", "")
+    return float(itm)
+
+
+def get_addr(itm):
+    itm = itm.replace("\n ", "")
+    return itm
+
+
+def get_params(data):
+    data = [itm.replace(": ", "") for itm in data if (itm != ' ') and (itm != '\n  ')]
+    data = [itm[:-1] if itm[-1] == ' ' else itm for itm in data]
+    result = {}
+    for idx in range(int(len(data) / 2)):
+        result.update({data[idx * 2]: data[idx * 2 + 1]})
+    return result
+
+
+class FlatLoader(ItemLoader):
+    default_item_class = dict
+    url_out = TakeFirst()
+    title_out = TakeFirst()
+    seller_url_in = MapCompose(get_url)
+    seller_url_out = TakeFirst()
+    price_in = MapCompose(get_price)
+    price_out = TakeFirst()
+    address_in = MapCompose(get_addr)
+    address_out = TakeFirst()
+    parameters_out = Compose(get_params)

avito_parse/middlewares.py

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+# 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 AvitoParseSpiderMiddleware:
+    # 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 AvitoParseDownloaderMiddleware:
+    # 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)

avito_parse/pipelines.py

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+# 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
+from .settings import BOT_NAME
+from pymongo import MongoClient
+
+
+class AvitoParsePipeline:
+    def __init__(self):
+        client = MongoClient()
+        self.db = client[BOT_NAME]
+
+    def process_item(self, item, spider):
+        self.db[spider.name].insert_one(item)
+        return item

avito_parse/settings.py

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+# Scrapy settings for avito_parse 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 = 'avito_parse'
+
+SPIDER_MODULES = ['avito_parse.spiders']
+NEWSPIDER_MODULE = 'avito_parse.spiders'
+
+LOG_ENABLE = True
+LOG_LEVEL = "DEBUG"
+
+# Crawl responsibly by identifying yourself (and your website) on the user-agent
+USER_AGENT = 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0'
+# USER_AGENT = ['Mozilla/5.0 '
+#               '(Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 '
+#               '(Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 '
+#               '(Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 '
+#               '(Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 '
+#               '(Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 '
+#               '(Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36',
+#               'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0']
+
+# 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 = 16
+
+# Disable cookies (enabled by default)
+COOKIES_ENABLED = True
+
+# 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": "ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3",
+}
+
+# Enable or disable spider middlewares
+# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+#SPIDER_MIDDLEWARES = {
+#    'avito_parse.middlewares.AvitoParseSpiderMiddleware': 543,
+#}
+
+# Enable or disable downloader middlewares
+# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
+# DOWNLOADER_MIDDLEWARES = {
+#     'avito_parse.middlewares.AvitoParseDownloaderMiddleware': 543,
+#     'rotating_proxies.middlewares.RotatingProxyMiddleware': 610,
+#     'rotating_proxies.middlewares.BanDetectionMiddleware': 620,
+# }
+
+# 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 = {
+   'avito_parse.pipelines.AvitoParsePipeline': 300,
+}
+
+# Enable and configure the AutoThrottle extension (disabled by default)
+# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
+# AUTOTHROTTLE_ENABLED = False
+# The initial download delay
+# AUTOTHROTTLE_START_DELAY = 2
+# The maximum download delay to be set in case of high latencies
+# AUTOTHROTTLE_MAX_DELAY = 10
+# 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 = True
+
+# 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'
+# ROTATING_PROXY_LIST_PATH = 'good_proxies'

avito_parse/spiders/__init__.py

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+# 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.

avito_parse/spiders/avito.py

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+import scrapy
+from ..loaders import FlatLoader
+
+
+class AvitoSpider(scrapy.Spider):
+    name = 'avito'
+    allowed_domains = ['www.avito.ru']
+    start_urls = ['https://www.avito.ru/moskva/kvartiry/prodam']
+
+    _xpath_selectors = {
+        "pagination": '//div[contains(@class, "pagination-hidden")]//a[@class="pagination-page"]/@href',
+        "flat_url": '//div[@data-marker="item"]'
+                    '//div[contains(@class, "iva-item-body")]'
+                    '//a[@data-marker="item-title"]/@href',
+    }
+
+    _xpath_data_selectors = {
+        "title": '//h1[@class="title-info-title"]/span[@class="title-info-title-text"]/text()',
+        "price": '//div[@class="item-price-wrapper"]/div[@id="price-value"]//span[@itemprop="price"]/text()',
+        "address": '//div[@itemprop="address"]/span[@class="item-address__string"]/text()',
+        "parameters": '//div[@class="item-params"]//li[@class="item-params-list-item"]//text()',
+        "seller_url": '//div[@data-marker="seller-info/name"]/a/@href' # добавить домен
+    }
+
+    def _get_follow(self, response, selector_str, callback):
+        for itm in response.xpath(selector_str):
+            yield response.follow(itm, callback=callback)
+
+    def parse(self, response, *args, **kwargs):
+        yield from self._get_follow(
+            response, self._xpath_selectors["pagination"], self.parse
+        )
+        yield from self._get_follow(
+            response, self._xpath_selectors["flat_url"], self.flat_parse
+        )
+
+    def flat_parse(self, response):
+        flat_loader = FlatLoader(response=response)
+        flat_loader.add_value("url", response.url)
+        for key, xpath in self._xpath_data_selectors.items():
+            flat_loader.add_xpath(key, xpath)
+        yield flat_loader.load_item()

main.py

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+from scrapy.crawler import CrawlerProcess
+from scrapy.settings import Settings
+from avito_parse.spiders.avito import AvitoSpider
+
+
+if __name__ == "__main__":
+    crawler_settings = Settings()
+    crawler_settings.setmodule("avito_parse.settings")
+    crawler_process = CrawlerProcess(settings=crawler_settings)
+    crawler_process.crawl(AvitoSpider)
+    crawler_process.start()

scrapy.cfg

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+# Automatically created by: scrapy startproject
+#
+# For more information about the [deploy] section see:
+# https://scrapyd.readthedocs.io/en/latest/deploy.html
+
+[settings]
+default = avito_parse.settings
+
+[deploy]
+#url = http://localhost:6800/
+project = avito_parse