scrapy 部署
下面简单介绍两种部署的方式,crontab定时任务+日志,第二种则是scrapyd+spiderkeeper,更推荐后者,图形界面的方式,管理方便,清晰。
scrapy 开发调试
1、在spiders同目录下新建一个run.py文件,内容如下(列表里面最后可以加上参数,如--nolog)
2、下面命令只限于,快速调试的作用或一个项目下单个spider的爬行任务。
from scrapy.cmdline import execute
execute(['scrapy','crawl','app1'])
多爬虫并发:
1、在spiders同级创建任意目录,如:commands
2、在其中创建 crawlall.py 文件 (此处文件名就是自定义的命令)
crawlall.py
from scrapy.commands import ScrapyCommand
from scrapy.crawler import CrawlerRunner
from scrapy.exceptions import UsageError
from scrapy.utils.conf import arglist_to_dict class Command(ScrapyCommand):
requires_project = True def syntax(self):
return '[options]' def short_desc(self):
return 'Runs all of the spiders' def add_options(self, parser):
ScrapyCommand.add_options(self, parser)
parser.add_option("-a", dest="spargs", action="append", default=[], metavar="NAME=VALUE",
help="set spider argument (may be repeated)")
parser.add_option("-o", "--output", metavar="FILE",
help="dump scraped items into FILE (use - for stdout)")
parser.add_option("-t", "--output-format", metavar="FORMAT",
help="format to use for dumping items with -o") def process_options(self, args, opts):
ScrapyCommand.process_options(self, args, opts)
try:
opts.spargs = arglist_to_dict(opts.spargs)
except ValueError:
raise UsageError("Invalid -a value, use -a NAME=VALUE", print_help=False) def run(self, args, opts):
# settings = get_project_settings() spider_loader = self.crawler_process.spider_loader
for spidername in args or spider_loader.list():
print("*********cralall NewsSpider************")
self.crawler_process.crawl(spidername, **opts.spargs)
self.crawler_process.start()
3、到这里还没完,settings.py配置文件还需要加一条。
COMMANDS_MODULE = ‘项目名称.目录名称’
COMMANDS_MODULE = 'NewSpider.commands'
4、执行命令
$ scrapy crawlall
5、 日志输出,
# 保存log信息的文件名
LOG_FILE = "myspider.log"
LOG_LEVEL = "INFO"
scrapyd+spiderkeeper
1.安装
$ pip install scrapyd $ pip install scrapyd-client $ pip install spiderkeeper
2.配置
配置scrapy.cfg文件,取消注释url
[settings]
default = project.settings [deploy:project_deploy]
url = http://localhost:6800/
project = project username = root
password = password
scrapyd-deploy在linux和mac下可运行,windows下需在python/scripts路径下新建scrapyd-deploy.bat,注意了,下面python路径以及scrapyd-deploy路径需要修改
@echo off "C:\Users\CZN\scrapyVir\Scripts\python.exe" "C:\Users\CZN\scrapyVir\Scripts\scrapyd-deploy" %1 %2 %3 %4 %5 %6 %7 %8 %9
cmd下进入scrapy项目根目录,
1)敲入scrapyd-deploy -l
project http://localhost:6800/
2)敲入scrapy list 显示 spider 列表
LOG_STDOUT = True # 大坑,导致scrapy list 失效
3)scrapyd #在scrapy.cfg同路径下启动scrapyd服务器 端口6800
4)spiderkeeper --server=http://localhost:6800 --username=root --password=password #启动spiderkeep 端口5000
5)scrapyd-deploy project_deploy -p project #发布工程到scrapyd
成功返回json数据
6)scrapyd-deploy --build-egg output.egg #生成output.egg文件
7)spiderkeep图形界面上传output.egg即可
部署完成,设置定时爬取任务或启动单个spider
settings.py 几个具有普适性配置
# Obey robots.txt rules
ROBOTSTXT_OBEY = False CONCURRENT_REQUESTS = 32
DOWNLOAD_DELAY = 0.1
DOWNLOAD_TIMEOUT = 10
RETRY_TIMES = 5
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16
COOKIES_ENABLED = False
最新文章
- C# Console控制命令
- 北大poj- 1028
- Kafka深入理解-1:Kafka高效的文件存储设计
- Smart210学习记录----nand flash驱动
- apache安装后编译新模块
- Subsets [LeetCode]
- Who needs an architect?---Martin Fowler
- Spring在代码中获取bean的几种方式
- Redis学习手册(虚拟内存)
- C++中关于const的思考
- http://www.shengshiyouxi.com
- 【原创】一个基于简单剪枝的DFS解数独程序
- 关于js 构造 onclick 方法中传递Guid参数问题
- 第九章 BootstrapTable的使用
- Spring Boot快速入门(一): Hello Spring Boot
- [LeetCode] Can Place Flowers 可以放置花
- SwipeBackLayout 右滑退出Activity
- 【AGC013C】Ants on a Circle 弹性碰撞
- 10.31vue(一)
- async await的用法