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Add TV posters to Facebook notifications
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3 changed files with 160 additions and 26 deletions
107
lib/openanything.py
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107
lib/openanything.py
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'''OpenAnything: a kind and thoughtful library for HTTP web services
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This program is part of 'Dive Into Python', a free Python book for
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experienced programmers. Visit http://diveintopython.org/ for the
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latest version.
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'''
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__author__ = 'Mark Pilgrim (mark@diveintopython.org)'
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__version__ = '$Revision: 1.6 $'[11:-2]
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__date__ = '$Date: 2004/04/16 21:16:24 $'
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__copyright__ = 'Copyright (c) 2004 Mark Pilgrim'
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__license__ = 'Python'
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import urllib2, urlparse, gzip
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from StringIO import StringIO
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USER_AGENT = 'OpenAnything/%s +http://diveintopython.org/http_web_services/' % __version__
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class SmartRedirectHandler(urllib2.HTTPRedirectHandler):
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def http_error_301(self, req, fp, code, msg, headers):
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result = urllib2.HTTPRedirectHandler.http_error_301(
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self, req, fp, code, msg, headers)
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result.status = code
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return result
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def http_error_302(self, req, fp, code, msg, headers):
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result = urllib2.HTTPRedirectHandler.http_error_302(
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self, req, fp, code, msg, headers)
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result.status = code
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return result
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class DefaultErrorHandler(urllib2.HTTPDefaultErrorHandler):
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def http_error_default(self, req, fp, code, msg, headers):
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result = urllib2.HTTPError(
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req.get_full_url(), code, msg, headers, fp)
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result.status = code
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return result
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def openAnything(source, etag=None, lastmodified=None, agent=USER_AGENT):
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"""URL, filename, or string --> stream
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This function lets you define parsers that take any input source
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(URL, pathname to local or network file, or actual data as a string)
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and deal with it in a uniform manner. Returned object is guaranteed
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to have all the basic stdio read methods (read, readline, readlines).
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Just .close() the object when you're done with it.
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If the etag argument is supplied, it will be used as the value of an
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If-None-Match request header.
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If the lastmodified argument is supplied, it must be a formatted
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date/time string in GMT (as returned in the Last-Modified header of
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a previous request). The formatted date/time will be used
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as the value of an If-Modified-Since request header.
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If the agent argument is supplied, it will be used as the value of a
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User-Agent request header.
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"""
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if hasattr(source, 'read'):
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return source
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if source == '-':
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return sys.stdin
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if urlparse.urlparse(source)[0] == 'http':
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# open URL with urllib2
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request = urllib2.Request(source)
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request.add_header('User-Agent', agent)
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if lastmodified:
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request.add_header('If-Modified-Since', lastmodified)
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if etag:
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request.add_header('If-None-Match', etag)
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request.add_header('Accept-encoding', 'gzip')
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opener = urllib2.build_opener(SmartRedirectHandler(), DefaultErrorHandler())
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return opener.open(request)
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# try to open with native open function (if source is a filename)
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try:
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return open(source)
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except (IOError, OSError):
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pass
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# treat source as string
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return StringIO(str(source))
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def fetch(source, etag=None, lastmodified=None, agent=USER_AGENT):
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'''Fetch data and metadata from a URL, file, stream, or string'''
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result = {}
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f = openAnything(source, etag, lastmodified, agent)
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result['data'] = f.read()
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if hasattr(f, 'headers'):
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# save ETag, if the server sent one
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result['etag'] = f.headers.get('ETag')
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# save Last-Modified header, if the server sent one
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result['lastmodified'] = f.headers.get('Last-Modified')
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if f.headers.get('content-encoding') == 'gzip':
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# data came back gzip-compressed, decompress it
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result['data'] = gzip.GzipFile(fileobj=StringIO(result['data'])).read()
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if hasattr(f, 'url'):
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result['url'] = f.url
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result['status'] = 200
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if hasattr(f, 'status'):
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result['status'] = f.status
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f.close()
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return result
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