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我有一個腳本在谷歌Appengine每20分鐘由cron.yaml啓動。這適用於本地,在我自己的機器上。當我(手動)到網上啓動腳本的網址時,它也可以工作。但是,當cron.yaml負責啓動它時,腳本總是無法在線完成,在Google的實例中。cron作業失敗gae python
日誌顯示沒有錯誤,只有2調試消息:
D 2013-07-23 06:00:08.449
type(soup): <class 'bs4.BeautifulSoup'> END type(soup)
D 2013-07-23 06:00:11.246
type(soup): <class 'bs4.BeautifulSoup'> END type(soup)
這裏是我的腳本:
# coding: utf-8
import jinja2, webapp2, urllib2, re
from bs4 import BeautifulSoup as bs
from google.appengine.api import memcache
from google.appengine.ext import db
class Article(db.Model):
content = db.TextProperty()
datetime = db.DateTimeProperty(auto_now_add=True)
companies = db.ListProperty(db.Key)
url = db.StringProperty()
class Company(db.Model):
name = db.StringProperty()
ticker = db.StringProperty()
@property
def articles(self):
return Article.gql("WHERE companies = :1", self.key())
def companies_key(companies_name=None):
return db.Key.from_path('Companies', companies_name or 'default_companies')
def articles_key(articles_name=None):
return db.Key.from_path('Articles', articles_name or 'default_articles')
def scrape():
companies = memcache.get("companies")
if not companies:
companies = Company.all()
memcache.add("companies",companies,30)
for company in companies:
links = links(company.ticker)
links = set(links)
for link in links:
if link is not "None":
article_object = Article()
text = fetch(link)
article_object.content = text
article_object.url = link
article_object.companies.append(company.key()) #doesn't work.
article_object.put()
def fetch(link):
try:
html = urllib2.urlopen(url).read()
soup = bs(html)
except:
return "None"
text = soup.get_text()
text = text.encode('utf-8')
text = text.decode('utf-8')
text = unicode(text)
if text is not "None":
return text
else:
return "None"
def links(ticker):
url = "https://www.google.com/finance/company_news?q=NASDAQ:" + ticker + "&start=10&num=10"
html = urllib2.urlopen(url).read()
soup = bs(html)
div_class = re.compile("^g-section.*")
divs = soup.find_all("div", {"class" : div_class})
links = []
for div in divs:
a = unicode(div.find('a', attrs={'href': re.compile("^http://")}))
link_regex = re.search("(http://.*?)\"",a)
try:
link = link_regex.group(1)
soup = bs(link)
link = soup.get_text()
except:
link = "None"
links.append(link)
return links
...和腳本的處理程序主:
class ScrapeHandler(webapp2.RequestHandler):
def get(self):
scrape.scrape()
self.redirect("/")
我的猜測是這個問題可能是scrape腳本中的double for循環,但我不明白爲什麼。
更新: 文章確實被刮(應該有多少),現在沒有日誌錯誤,甚至根本沒有調試信息。看着日誌,cron作業看起來完美無瑕。即便如此,Appengine的cron工作小組表示cron工作失敗。
發佈您的代碼,可能是它錯了。這些調試消息是否打印在cron作業處理程序中? – marcadian
調試消息在線顯示在gae日誌中。這隻能在谷歌自己的雲中失敗。在我的機器上,它沒有任何警告或調試。 – memius
你知道它沒有啓動,日誌表明有一些東西正在啓動。但可能沒有完成。我建議你在那裏放更多的日誌,看看進程到底有多遠。 –