# Written by John Hoffman
# see LICENSE.txt for license information
from httplib import HTTPConnection,HTTPSConnection,HTTPException
from urlparse import urlparse
from bencode import bdecode
from gzip import GzipFile
from StringIO import StringIO
from __init__ import product_name,version_short
VERSION = product_name+'/'+version_short
MAX_REDIRECTS = 10
class btHTTPcon(HTTPConnection): # attempt to add automatic connection timeout
def connect(self):
HTTPConnection.connect(self)
try:
self.sock.settimeout(30)
except:
pass
class btHTTPScon(HTTPSConnection): # attempt to add automatic connection timeout
def connect(self):
HTTPSConnection.connect(self)
try:
self.sock.settimeout(30)
except:
pass
class urlopen:
def __init__(self, url):
self.tries = 0
self._open(url.strip())
self.error_return = None
def _open(self, url):
self.tries += 1
if self.tries > MAX_REDIRECTS:
raise IOError, ('http error', 500,
"Internal Server Error: Redirect Recursion")
(scheme, netloc, path, pars, query, fragment) = urlparse(url)
if scheme != 'http' and scheme != 'https':
raise IOError, ('url error', 'unknown url type', scheme, url)
url = path
if pars:
url += ';'+pars
if query:
url += '?'+query
# if fragment:
try:
if scheme == 'http':
self.connection = btHTTPcon(netloc)
else:
self.connection = btHTTPScon(netloc)
self.connection.request('GET', url, None,
{ 'User-Agent': VERSION,
'Accept-Encoding': 'gzip' } )
self.response = self.connection.getresponse()
except HTTPException, e:
raise IOError, ('http error', str(e))
status = self.response.status
if status in (301, 302):
try:
self.connection.close()
except:
pass
self._open(self.response.getheader('Location'))
return
if status != 200:
try:
data = self._read()
d = bdecode(data)
if d.has_key('failure reason'):
self.error_return = data
return
except:
pass
raise IOError, ('http error', status, self.response.reason)
def read(self):
if self.error_return:
return self.error_return
return self._read()
def _read(self):
data = self.response.read()
if self.response.getheader('Content-Encoding', '').find('gzip') >= 0:
try:
compressed = StringIO(data)
f = GzipFile(fileobj = compressed)
data = f.read()
except:
raise IOError, ('http error', 'got corrupt response')
return data
def close(self):
self.connection.close()
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