第十八节：Scrapy爬虫框架之settings文件详解

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

# Scrapy settings for maoyan 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

# #Scrapy项目的名字,这将用来构造默认 User-Agent
BOT_NAME = 'BLZX'

SPIDER_MODULES = ['BLZX.spiders']         # Scrapy搜索spider的模块列表 默认: [xxx.spiders]
NEWSPIDER_MODULE = 'BLZX.spiders'         # 使用 genspider 命令创建新spider的模块。默认: 'xxx.spiders'

# 通过在用户代理上标识您自己（和您的网站）来负责地爬行
# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'maoyan (+http://www.yourdomain.com)'

# Obey robots.txt rules    遵守robots.txt规则
ROBOTSTXT_OBEY = False

# 配置Scrapy执行的最大并发请求（默认值：16）
# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32

# 同一网站的请求配置延迟（默认值：0）
# 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
# 下载延迟
#DOWNLOAD_DELAY = 3

# 下载延迟设置将仅满足以下条件之一(二选一)
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16            # 每个域的并发请求的最大值
#CONCURRENT_REQUESTS_PER_IP = 16                # 对单个IP进行并发请求的最大值

# 禁用cookie（默认情况下启用）
# Disable cookies (enabled by default)
#COOKIES_ENABLED = False

# 禁用telnet控制台（默认启用）
# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# 覆盖默认请求头
# 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',
#}

# 启用或禁用蜘蛛中间件
# Enable or disable spider middlewares
# See https://doc.scrapy.org/en/latest/topics/spider-middleware.html

# =======================Spider Middleware=============================
#SPIDER_MIDDLEWARES = {
#    'maoyan.middlewares.MaoyanSpiderMiddleware': 543,
#}

# 启用或禁用下载器中间件
# Enable or disable downloader middlewares
# See https://doc.scrapy.org/en/latest/topics/downloader-middleware.html

# =====================Downloader Middleware===========================
# DOWNLOADER_MIDDLEWARES = {
   # 'maoyan.middlewares.MaoyanDownloaderMiddleware': 543,
# }

# 启用或禁用扩展
# Enable or disable extensions
# See https://doc.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
#}

# 管道配置项目
# Configure item pipelines
# See https://doc.scrapy.org/en/latest/topics/item-pipeline.html
#ITEM_PIPELINES = {
#    'maoyan.pipelines.MaoyanPipeline': 300,
#}

# 启用和配置AutoThrottle扩展（默认情况下禁用）
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://doc.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True

# 初始下载延迟
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5

# 在高延迟情况下设置的最大下载延迟
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60

# Scrapy平均请求数应与每个远程服务器并行发送
# 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

# 启用和配置HTTP缓存（默认情况下禁用）
# 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'