root / snf-django-lib / snf_django / lib / api / proxy / __init__.py @ 142133fb
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# Copyright 2012, 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.http import HttpResponse |
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from objpool.http import PooledHTTPConnection |
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from .utils import fix_header, forward_header |
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import urllib |
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import urlparse |
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# We use proxy to delegate requests to another domain. Sending host specific
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# headers (Host, Cookie) may cause confusion to the server we proxy to.
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#
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# http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.10
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# Connection and MUST NOT be communicated by proxies over further connections
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EXCLUDE_HEADERS = ['Host', 'Cookie', 'Connection'] |
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def proxy(request, target): |
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kwargs = {} |
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# prepare headers
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headers = dict(map(lambda (k, v): fix_header(k, v), |
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filter(lambda (k, v): forward_header(k), |
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request.META.iteritems()))) |
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# set X-Forwarded-For, if already set, pass it through, otherwise set it
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# to the current request remote address
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SOURCE_IP = request.META.get('REMOTE_ADDR', None) |
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if SOURCE_IP and not 'X-Forwarded-For' in headers: |
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headers['X-Forwarded-For'] = SOURCE_IP
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# request.META remains cleanup
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for k in headers.keys(): |
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if '_' in k: |
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headers.pop(k) |
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for k in EXCLUDE_HEADERS: |
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headers.pop(k, None)
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kwargs['headers'] = headers
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kwargs['body'] = request.raw_post_data
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p = urlparse.urlparse(target) |
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with PooledHTTPConnection(p.netloc, p.scheme) as conn: |
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conn.request( |
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request.method, |
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'?'.join([request.path, urllib.urlencode(request.GET)]),
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**kwargs) |
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response = conn.getresponse() |
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# turn httplib.HttpResponse to django.http.Response
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length = response.getheader('content-length', None) |
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data = response.read(length) |
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status = int(response.status)
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return HttpResponse(data, status=status)
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