root / snf-django-lib / snf_django / lib / api / proxy / __init__.py @ 5ad8eca1
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1 | 33c84784 | Sofia Papagiannaki | # Copyright 2012, 2013 GRNET S.A. All rights reserved.
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2 | 33c84784 | Sofia Papagiannaki | #
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3 | 33c84784 | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
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4 | 33c84784 | Sofia Papagiannaki | # without modification, are permitted provided that the following
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5 | 33c84784 | Sofia Papagiannaki | # conditions are met:
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6 | 33c84784 | Sofia Papagiannaki | #
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7 | 33c84784 | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
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8 | 33c84784 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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9 | 33c84784 | Sofia Papagiannaki | # disclaimer.
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10 | 33c84784 | Sofia Papagiannaki | #
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11 | 33c84784 | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
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12 | 33c84784 | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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13 | 33c84784 | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
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14 | 33c84784 | Sofia Papagiannaki | # provided with the distribution.
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15 | 33c84784 | Sofia Papagiannaki | #
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16 | 33c84784 | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 33c84784 | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 33c84784 | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 33c84784 | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 33c84784 | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 33c84784 | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 33c84784 | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 33c84784 | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 33c84784 | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 33c84784 | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 33c84784 | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 33c84784 | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
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28 | 33c84784 | Sofia Papagiannaki | #
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29 | 33c84784 | Sofia Papagiannaki | # The views and conclusions contained in the software and
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30 | 33c84784 | Sofia Papagiannaki | # documentation are those of the authors and should not be
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31 | 33c84784 | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
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32 | 33c84784 | Sofia Papagiannaki | # or implied, of GRNET S.A.
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33 | 33c84784 | Sofia Papagiannaki | |
34 | 33c84784 | Sofia Papagiannaki | from django.http import HttpResponse |
35 | 33c84784 | Sofia Papagiannaki | |
36 | fed0b230 | Christos Stavrakakis | from objpool.http import PooledHTTPConnection |
37 | 33c84784 | Sofia Papagiannaki | |
38 | 5ad8eca1 | Kostas Papadimitriou | from synnefo.lib import join_urls |
39 | 5ad8eca1 | Kostas Papadimitriou | |
40 | 33c84784 | Sofia Papagiannaki | from .utils import fix_header, forward_header |
41 | 33c84784 | Sofia Papagiannaki | |
42 | 33c84784 | Sofia Papagiannaki | import urllib |
43 | 33c84784 | Sofia Papagiannaki | import urlparse |
44 | 33c84784 | Sofia Papagiannaki | |
45 | 142133fb | Kostas Papadimitriou | # We use proxy to delegate requests to another domain. Sending host specific
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46 | 142133fb | Kostas Papadimitriou | # headers (Host, Cookie) may cause confusion to the server we proxy to.
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47 | 142133fb | Kostas Papadimitriou | #
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48 | 142133fb | Kostas Papadimitriou | # http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.10
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49 | 142133fb | Kostas Papadimitriou | # Connection and MUST NOT be communicated by proxies over further connections
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50 | 142133fb | Kostas Papadimitriou | EXCLUDE_HEADERS = ['Host', 'Cookie', 'Connection'] |
51 | 142133fb | Kostas Papadimitriou | |
52 | 33c84784 | Sofia Papagiannaki | |
53 | 33c84784 | Sofia Papagiannaki | def proxy(request, target): |
54 | 33c84784 | Sofia Papagiannaki | kwargs = {} |
55 | 33c84784 | Sofia Papagiannaki | |
56 | 33c84784 | Sofia Papagiannaki | # prepare headers
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57 | 33c84784 | Sofia Papagiannaki | headers = dict(map(lambda (k, v): fix_header(k, v), |
58 | 33c84784 | Sofia Papagiannaki | filter(lambda (k, v): forward_header(k), |
59 | 33c84784 | Sofia Papagiannaki | request.META.iteritems()))) |
60 | 33c84784 | Sofia Papagiannaki | |
61 | 142133fb | Kostas Papadimitriou | # set X-Forwarded-For, if already set, pass it through, otherwise set it
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62 | 142133fb | Kostas Papadimitriou | # to the current request remote address
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63 | 142133fb | Kostas Papadimitriou | SOURCE_IP = request.META.get('REMOTE_ADDR', None) |
64 | 142133fb | Kostas Papadimitriou | if SOURCE_IP and not 'X-Forwarded-For' in headers: |
65 | 142133fb | Kostas Papadimitriou | headers['X-Forwarded-For'] = SOURCE_IP
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66 | 142133fb | Kostas Papadimitriou | |
67 | 142133fb | Kostas Papadimitriou | # request.META remains cleanup
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68 | 142133fb | Kostas Papadimitriou | for k in headers.keys(): |
69 | 142133fb | Kostas Papadimitriou | if '_' in k: |
70 | 142133fb | Kostas Papadimitriou | headers.pop(k) |
71 | 142133fb | Kostas Papadimitriou | |
72 | 142133fb | Kostas Papadimitriou | for k in EXCLUDE_HEADERS: |
73 | 142133fb | Kostas Papadimitriou | headers.pop(k, None)
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74 | 142133fb | Kostas Papadimitriou | |
75 | 33c84784 | Sofia Papagiannaki | kwargs['headers'] = headers
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76 | 33c84784 | Sofia Papagiannaki | kwargs['body'] = request.raw_post_data
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77 | 33c84784 | Sofia Papagiannaki | |
78 | 33c84784 | Sofia Papagiannaki | p = urlparse.urlparse(target) |
79 | 5ad8eca1 | Kostas Papadimitriou | path = join_urls(p.path, request.path) |
80 | 33c84784 | Sofia Papagiannaki | with PooledHTTPConnection(p.netloc, p.scheme) as conn: |
81 | 33c84784 | Sofia Papagiannaki | conn.request( |
82 | 33c84784 | Sofia Papagiannaki | request.method, |
83 | 5ad8eca1 | Kostas Papadimitriou | '?'.join([path, urllib.urlencode(request.GET)]), **kwargs)
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84 | 33c84784 | Sofia Papagiannaki | response = conn.getresponse() |
85 | 33c84784 | Sofia Papagiannaki | |
86 | 33c84784 | Sofia Papagiannaki | # turn httplib.HttpResponse to django.http.Response
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87 | 33c84784 | Sofia Papagiannaki | length = response.getheader('content-length', None) |
88 | 33c84784 | Sofia Papagiannaki | data = response.read(length) |
89 | 33c84784 | Sofia Papagiannaki | status = int(response.status)
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90 | 33c84784 | Sofia Papagiannaki | return HttpResponse(data, status=status) |