def Items(self, opts=None):
"""
生成器，返回一个元组
对于HTML：section,url,title,content,brief
对于图片，mime,url,filename,content,brief
"""
urls = self.ParseFeedUrls()
readability = self.readability if self.fulltext_by_readability else self.readability_by_soup
prevsection = ''
decoder = AutoDecoder(False)
if USE_ASYNC_URLFETCH:
#启动异步下载
asyncopener = AsyncURLOpener(self.log)
rpcs = [
asyncopener.fetch(url, self.timeout, sec, title)
for sec, title, url, desc in urls if not desc
]
#为了效率起见，先处理全文RSS
#在处理全文RSS的时候，其他RSS在后台拼命下载中...
for section, ftitle, url, desc in urls:
if not desc:
continue
article = self.FragToXhtml(desc, ftitle)
#如果是图片，title则是mime
for title, imgurl, imgfn, content, brief in readability(
article, url, opts):
if title.startswith(r'image/'): #图片
yield (title, imgurl, imgfn, content, brief)
else:
if not title: title = ftitle
content = self.postprocess(content)
yield (section, url, title, content, brief)
#轮到摘要RSS了
for result, url, (section, ftitle) in asyncopener.get_result():
if section != prevsection or prevsection == '':
decoder.encoding = '' #每个小节都重新探测编码
prevsection = section
status_code, content = result.status_code, result.content
if status_code != 200 or not content:
self.log.warn('async fetch article failed(%d):%s.' %
(status_code, url))
continue
if self.page_encoding:
article = content.decode(self.page_encoding)
else:
article = decoder.decode(content, url)
#如果是图片，title则是mime
for title, imgurl, imgfn, content, brief in readability(
article, url, opts):
if title.startswith(r'image/'): #图片
yield (title, imgurl, imgfn, content, brief)
else:
if not title: title = ftitle
content = self.postprocess(content)
yield (section, url, title, content, brief)
else: #同步UrlFetch方式
for section, ftitle, url, desc in urls:
if not desc: #非全文RSS
if section != prevsection or prevsection == '':
decoder.encoding = '' #每个小节都重新探测编码
prevsection = section
article = self.fetcharticle(url, decoder)
if not article:
continue
else:
article = self.FragToXhtml(desc, ftitle)
#如果是图片，title则是mime
for title, imgurl, imgfn, content, brief in readability(
article, url, opts):
if title.startswith(r'image/'): #图片
yield (title, imgurl, imgfn, content, brief)
else:
if not title: title = ftitle
content = self.postprocess(content)
yield (section, url, title, content, brief)
def ParseFeedUrls(self):
""" return list like [(section,title,url,desc),..] """
urls = []
tnow = datetime.utcnow()
urladded = set()
asyncopener = AsyncURLOpener(self.log)
for feed in self.feeds:
section, url = feed[0], feed[1]
isfulltext = feed[2] if len(feed) > 2 else False
timeout = self.timeout + 10 if isfulltext else self.timeout
if USE_ASYNC_URLFETCH_IN_FEEDS:
asyncopener.fetch(url, timeout, section, isfulltext)
continue
opener = URLOpener(self.host, timeout=timeout)
result = opener.open(url)
if result.status_code == 200 and result.content:
if self.feed_encoding:
content = result.content.decode(self.feed_encoding)
else:
content = AutoDecoder(True).decode(result.content, url)
feed = feedparser.parse(content)
for e in feed['entries'][:self.max_articles_per_feed]:
if self.oldest_article > 0 and hasattr(
e, 'updated_parsed'):
updated = e.updated_parsed
if updated:
delta = tnow - datetime(*(updated[0:6]))
if delta.days * 86400 + delta.seconds > 86400 * self.oldest_article:
self.log.debug("article '%s' is too old" %
e.title)
continue
#支持HTTPS
urlfeed = e.link.replace(
'http://',
'https://') if url.startswith('https://') else e.link
if urlfeed in urladded:
continue
desc = None
if isfulltext:
if hasattr(e, 'content') and e.content[0]['value']:
desc = e.content[0]['value']
elif hasattr(e, 'description'):
desc = e.description
else:
self.log.warn(
'feed item invalid,link to webpage for article.(%s)'
% e.title)
urls.append((section, e.title, urlfeed, desc))
urladded.add(urlfeed)
else:
self.log.warn('fetch rss failed(%d):%s' %
(result.status_code, url))
#异步下载
if USE_ASYNC_URLFETCH_IN_FEEDS:
for result, url, (section, isfulltext) in asyncopener.get_result():
if result.status_code == 200 and result.content:
if self.feed_encoding:
content = result.content.decode(self.feed_encoding)
else:
content = AutoDecoder(True).decode(result.content, url)
feed = feedparser.parse(content)
for e in feed['entries'][:self.max_articles_per_feed]:
if self.oldest_article > 0 and hasattr(
e, 'updated_parsed'):
updated = e.updated_parsed
if updated:
delta = tnow - datetime(*(updated[0:6]))
if delta.days * 86400 + delta.seconds > 86400 * self.oldest_article:
self.log.debug("article '%s' is too old" %
e.title)
continue
#支持HTTPS
urlfeed = e.link.replace('http://',
'https://') if url.startswith(
'https://') else e.link
if urlfeed in urladded:
continue
desc = None
if isfulltext:
if hasattr(e, 'content') and e.content[0]['value']:
desc = e.content[0]['value']
elif hasattr(e, 'description'):
desc = e.description
else:
self.log.warn(
'feed item invalid,link to webpage for article.(%s)'
% e.title)
urls.append((section, e.title, urlfeed, desc))
urladded.add(urlfeed)
else:
self.log.warn('async fetch rss failed(%d):%s' %
(result.status_code, url))
return urls
