root / api / util.py @ a62a4d20
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1 | 7e2f9d4b | Giorgos Verigakis | #
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2 | 7e2f9d4b | Giorgos Verigakis | # Copyright (c) 2010 Greek Research and Technology Network
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3 | 7e2f9d4b | Giorgos Verigakis | #
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4 | 7e2f9d4b | Giorgos Verigakis | |
5 | 7e2f9d4b | Giorgos Verigakis | from synnefo.api.errors import * |
6 | 7e2f9d4b | Giorgos Verigakis | from synnefo.db.models import * |
7 | 7e2f9d4b | Giorgos Verigakis | |
8 | 7e2f9d4b | Giorgos Verigakis | from django.http import HttpResponse |
9 | 7e2f9d4b | Giorgos Verigakis | from django.template.loader import render_to_string |
10 | 7e2f9d4b | Giorgos Verigakis | |
11 | 7e2f9d4b | Giorgos Verigakis | from functools import wraps |
12 | 7e2f9d4b | Giorgos Verigakis | from logging import getLogger |
13 | 7e2f9d4b | Giorgos Verigakis | from random import choice |
14 | 7e2f9d4b | Giorgos Verigakis | from string import ascii_letters, digits |
15 | 7e2f9d4b | Giorgos Verigakis | from traceback import format_exc |
16 | 7e2f9d4b | Giorgos Verigakis | from xml.etree import ElementTree |
17 | 7e2f9d4b | Giorgos Verigakis | from xml.parsers.expat import ExpatError |
18 | 7e2f9d4b | Giorgos Verigakis | |
19 | 7e2f9d4b | Giorgos Verigakis | import json |
20 | 7e2f9d4b | Giorgos Verigakis | |
21 | 7e2f9d4b | Giorgos Verigakis | |
22 | 7e2f9d4b | Giorgos Verigakis | log = getLogger('synnefo.api')
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23 | 7e2f9d4b | Giorgos Verigakis | |
24 | 7e2f9d4b | Giorgos Verigakis | |
25 | 7e2f9d4b | Giorgos Verigakis | def tag_name(e): |
26 | 7e2f9d4b | Giorgos Verigakis | ns, sep, name = e.tag.partition('}')
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27 | 7e2f9d4b | Giorgos Verigakis | return name if sep else e.tag |
28 | 7e2f9d4b | Giorgos Verigakis | |
29 | 7e2f9d4b | Giorgos Verigakis | def xml_to_dict(s): |
30 | c36934a7 | Giorgos Verigakis | # XXX Quick and dirty
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31 | 7e2f9d4b | Giorgos Verigakis | def _xml_to_dict(e): |
32 | 7e2f9d4b | Giorgos Verigakis | root = {} |
33 | 7e2f9d4b | Giorgos Verigakis | d = root[tag_name(e)] = dict(e.items())
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34 | 7e2f9d4b | Giorgos Verigakis | for child in e.getchildren(): |
35 | 7e2f9d4b | Giorgos Verigakis | d.update(_xml_to_dict(child)) |
36 | 7e2f9d4b | Giorgos Verigakis | return root
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37 | 7e2f9d4b | Giorgos Verigakis | return _xml_to_dict(ElementTree.fromstring(s.strip()))
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38 | 7e2f9d4b | Giorgos Verigakis | |
39 | 7e2f9d4b | Giorgos Verigakis | def get_user(): |
40 | 7e2f9d4b | Giorgos Verigakis | # XXX Placeholder function, everything belongs to a single SynnefoUser for now
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41 | 7e2f9d4b | Giorgos Verigakis | try:
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42 | 7e2f9d4b | Giorgos Verigakis | return SynnefoUser.objects.all()[0] |
43 | 7e2f9d4b | Giorgos Verigakis | except IndexError: |
44 | 7e2f9d4b | Giorgos Verigakis | raise Unauthorized
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45 | 7e2f9d4b | Giorgos Verigakis | |
46 | 7e2f9d4b | Giorgos Verigakis | def get_request_dict(request): |
47 | 7e2f9d4b | Giorgos Verigakis | data = request.raw_post_data |
48 | 7e2f9d4b | Giorgos Verigakis | if request.type == 'xml': |
49 | 7e2f9d4b | Giorgos Verigakis | try:
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50 | 7e2f9d4b | Giorgos Verigakis | return xml_to_dict(data)
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51 | 7e2f9d4b | Giorgos Verigakis | except ExpatError:
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52 | 7e2f9d4b | Giorgos Verigakis | raise BadRequest
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53 | 7e2f9d4b | Giorgos Verigakis | else:
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54 | 7e2f9d4b | Giorgos Verigakis | try:
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55 | 7e2f9d4b | Giorgos Verigakis | return json.loads(data)
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56 | 7e2f9d4b | Giorgos Verigakis | except ValueError: |
57 | 7e2f9d4b | Giorgos Verigakis | raise BadRequest
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58 | 7e2f9d4b | Giorgos Verigakis | |
59 | 7e2f9d4b | Giorgos Verigakis | def random_password(length=8): |
60 | 7e2f9d4b | Giorgos Verigakis | pool = ascii_letters + digits |
61 | 7e2f9d4b | Giorgos Verigakis | return ''.join(choice(pool) for i in range(length)) |
62 | 7e2f9d4b | Giorgos Verigakis | |
63 | 7e2f9d4b | Giorgos Verigakis | |
64 | c36934a7 | Giorgos Verigakis | def render_fault(request, fault): |
65 | 7e2f9d4b | Giorgos Verigakis | if settings.DEBUG or request.META.get('SERVER_NAME', None) == 'testserver': |
66 | 7e2f9d4b | Giorgos Verigakis | fault.details = format_exc(fault) |
67 | 7e2f9d4b | Giorgos Verigakis | if request.type == 'xml': |
68 | 7e2f9d4b | Giorgos Verigakis | mimetype = 'application/xml'
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69 | 7e2f9d4b | Giorgos Verigakis | data = render_to_string('fault.xml', dict(fault=fault)) |
70 | 7e2f9d4b | Giorgos Verigakis | else:
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71 | 7e2f9d4b | Giorgos Verigakis | mimetype = 'application/json'
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72 | 7e2f9d4b | Giorgos Verigakis | d = {fault.name: {'code': fault.code, 'message': fault.message, 'details': fault.details}} |
73 | 7e2f9d4b | Giorgos Verigakis | data = json.dumps(d) |
74 | 7e2f9d4b | Giorgos Verigakis | return HttpResponse(data, mimetype=mimetype, status=fault.code)
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75 | 7e2f9d4b | Giorgos Verigakis | |
76 | c36934a7 | Giorgos Verigakis | def api_method(http_method): |
77 | c36934a7 | Giorgos Verigakis | def decorator(func): |
78 | c36934a7 | Giorgos Verigakis | @wraps(func)
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79 | c36934a7 | Giorgos Verigakis | def wrapper(request, *args, **kwargs): |
80 | c36934a7 | Giorgos Verigakis | try:
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81 | c36934a7 | Giorgos Verigakis | if request.path.endswith('.json'): |
82 | c36934a7 | Giorgos Verigakis | type = 'json'
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83 | c36934a7 | Giorgos Verigakis | elif request.path.endswith('.xml'): |
84 | c36934a7 | Giorgos Verigakis | type = 'xml'
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85 | c36934a7 | Giorgos Verigakis | elif request.META.get('HTTP_ACCEPT', None) == 'application/xml': |
86 | c36934a7 | Giorgos Verigakis | type = 'xml'
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87 | c36934a7 | Giorgos Verigakis | else:
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88 | c36934a7 | Giorgos Verigakis | type = 'json'
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89 | c36934a7 | Giorgos Verigakis | request.type = type
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90 | c36934a7 | Giorgos Verigakis | |
91 | c36934a7 | Giorgos Verigakis | if request.method != http_method:
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92 | c36934a7 | Giorgos Verigakis | raise BadRequest()
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93 | c36934a7 | Giorgos Verigakis | |
94 | c36934a7 | Giorgos Verigakis | resp = func(request, *args, **kwargs) |
95 | c36934a7 | Giorgos Verigakis | resp['Content-Type'] = 'application/xml' if type == 'xml' else 'application/json' |
96 | c36934a7 | Giorgos Verigakis | return resp
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97 | c36934a7 | Giorgos Verigakis | except Fault, fault:
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98 | c36934a7 | Giorgos Verigakis | return render_fault(request, fault)
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99 | a62a4d20 | Giorgos Verigakis | except BaseException, e: |
100 | c36934a7 | Giorgos Verigakis | log.exception('Unexpected error: %s' % e)
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101 | c36934a7 | Giorgos Verigakis | fault = ServiceUnavailable() |
102 | c36934a7 | Giorgos Verigakis | return render_fault(request, fault)
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103 | c36934a7 | Giorgos Verigakis | return wrapper
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104 | c36934a7 | Giorgos Verigakis | return decorator |