35 lines
1.1 KiB
Python
35 lines
1.1 KiB
Python
"""A simple web server that accepts POSTS containing a list of feed urls,
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and returns the titles of those feeds.
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"""
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import eventlet
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feedparser = eventlet.import_patched('feedparser')
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# the pool provides a safety limit on our concurrency
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pool = eventlet.GreenPool()
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def fetch_title(url):
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d = feedparser.parse(url)
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return d.feed.get('title', '')
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def app(environ, start_response):
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if environ['REQUEST_METHOD'] != 'POST':
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start_response('403 Forbidden', [])
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return []
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# the pile collects the result of a concurrent operation -- in this case,
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# the collection of feed titles
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pile = eventlet.GreenPile(pool)
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for line in environ['wsgi.input'].readlines():
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url = line.strip()
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if url:
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pile.spawn(fetch_title, url)
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# since the pile is an iterator over the results,
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# you can use it in all sorts of great Pythonic ways
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titles = '\n'.join(pile)
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start_response('200 OK', [('Content-type', 'text/plain')])
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return [titles]
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if __name__ == '__main__':
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from eventlet import wsgi
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wsgi.server(eventlet.listen(('localhost', 9010)), app) |