爬蟲scrapy框架 settings檔案介紹

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

# Scrapy settings for baidu project

# For simplicity, this file 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

# 專案名稱：在使用startproject時創建
BOT_NAME = 'baidu'

# 爬蟲檔案所在目錄
SPIDER_MODULES = ['baidu.spiders']
# 創建爬蟲檔案的模板，創建好的爬蟲檔案會存在此目錄下
NEWSPIDER_MODULE = 'baidu.spiders'


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

# Obey robots.txt rules
# 是否服從機器人(爬蟲)協議，scrapy默認是服從
ROBOTSTXT_OBEY = False

# Configure maximum concurrent requests performed by Scrapy (default: 16)
# 下載器處理的最大并發請求數量
# 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
# 下載延時，單位是秒，默認是0
# 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)
# 是否攜帶cookie,默認是True，代表攜帶
#COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
# 設定默認請求頭
# 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
# 是否啟用爬蟲中間件
# SPIDER_MIDDLEWARES = {
#    'baidu.middlewares.BaiduSpiderMiddleware': 543,
# }

# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html
# 設定下載中間件
# DOWNLOADER_MIDDLEWARES = {
#    'baidu.middlewares.BaiduDownloaderMiddleware': 543,
# }

# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html

# 設定擴展功能
# EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
# }

# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html

# 激活管道檔案
# 注意：如果需要對資料進行處理（使用pipelines.py檔案），必須解開注釋
# ITEM_PIPELINES = {
#    'baidu.pipelines.BaiduPipeline': 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'