更新由scrapyd控制的蜘蛛代码

时间:2017-01-10 11:38:43

标签: scrapy scrapyd

安装/激活由scrapyd控制的蜘蛛的正确方法是什么?

我使用scrapyd-deploy安装了一个新的蜘蛛版本;一份工作目前正在运行。我是否必须使用cancel.json停止工作,然后安排新工作?

1 个答案:

答案 0 :(得分:0)

回答我自己的问题:

我写了一个小的python脚本来阻止所有正在运行的蜘蛛。运行此脚本后,我运行scrapyd-deploy,然后重新启动我的蜘蛛。 我仍然不确定这是否是scrapy专业人员会这样做的方式,但对我来说这看起来很合理。

这是脚本(替换PROJECT的值以适合您),它需要requests包(pip install requests):

import requests
import sys
import time


PROJECT = 'crawler'  # replace with your project's name

resp = requests.get("http://localhost:6800/listjobs.json?project=%s" % PROJECT)
list_json = resp.json()
failed = False

count = len(list_json["running"])
if count == 0:
    print "No running spiders found."
    sys.exit(0)

for sp in list_json["running"]:
    # cancel this spider
    r = requests.post("http://localhost:6800/cancel.json", data={"project":PROJECT, "job": sp["id"]})
    print "Sent cancel request for %s %s" % (sp["spider"], sp["id"])
    print "Status: %s" % r.json()
    if r.json()["status"] != "ok":
        print "ERROR: Failed to stop spider %s" % sp["spider"]
        failed = True

if failed:
    sys.exit(1)

# poll running spiders and wait until all spiders are down
while count:
    time.sleep(2)
    resp = requests.get("http://localhost:6800/listjobs.json?project=%s" % PROJECT)
    count = len(resp.json()["running"])
    print "%d spiders still running" % count