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1 | # GNU MediaGoblin -- federated, autonomous media hosting |
2 | # Copyright (C) 2013 MediaGoblin contributors. See AUTHORS. | |
3 | # | |
4 | # This program is free software: you can redistribute it and/or modify | |
5 | # it under the terms of the GNU Affero General Public License as published by | |
6 | # the Free Software Foundation, either version 3 of the License, or | |
7 | # (at your option) any later version. | |
8 | # | |
9 | # This program is distributed in the hope that it will be useful, | |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU Affero General Public License for more details. | |
13 | # | |
14 | # You should have received a copy of the GNU Affero General Public License | |
15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | ||
17 | import logging | |
18 | ||
19 | import lxml.etree as ET | |
20 | from werkzeug.exceptions import MethodNotAllowed | |
21 | ||
22 | from mediagoblin.tools.response import Response | |
23 | ||
24 | ||
25 | _log = logging.getLogger(__name__) | |
26 | ||
27 | ||
28 | class PwgNamedArray(list): | |
29 | def __init__(self, l, item_name, as_attrib=()): | |
30 | self.item_name = item_name | |
31 | self.as_attrib = as_attrib | |
32 | list.__init__(self, l) | |
33 | ||
34 | def fill_element_xml(self, el): | |
35 | for it in self: | |
36 | n = ET.SubElement(el, self.item_name) | |
37 | if isinstance(it, dict): | |
38 | _fill_element_dict(n, it, self.as_attrib) | |
39 | else: | |
40 | _fill_element(n, it) | |
41 | ||
42 | ||
43 | def _fill_element_dict(el, data, as_attr=()): | |
1330abf7 | 44 | for k, v in data.iteritems(): |
4234fffa E |
45 | if k in as_attr: |
46 | if not isinstance(v, basestring): | |
47 | v = str(v) | |
48 | el.set(k, v) | |
49 | else: | |
50 | n = ET.SubElement(el, k) | |
51 | _fill_element(n, v) | |
52 | ||
53 | ||
54 | def _fill_element(el, data): | |
55 | if isinstance(data, bool): | |
56 | if data: | |
57 | el.text = "1" | |
58 | else: | |
59 | el.text = "0" | |
60 | elif isinstance(data, basestring): | |
61 | el.text = data | |
62 | elif isinstance(data, int): | |
63 | el.text = str(data) | |
64 | elif isinstance(data, dict): | |
65 | _fill_element_dict(el, data) | |
66 | elif isinstance(data, PwgNamedArray): | |
67 | data.fill_element_xml(el) | |
68 | else: | |
69 | _log.warn("Can't convert to xml: %r", data) | |
70 | ||
71 | ||
72 | def response_xml(result): | |
73 | r = ET.Element("rsp") | |
74 | r.set("stat", "ok") | |
75 | _fill_element(r, result) | |
76 | return Response(ET.tostring(r, encoding="utf-8", xml_declaration=True), | |
77 | mimetype='text/xml') | |
78 | ||
79 | ||
80 | class CmdTable(object): | |
81 | _cmd_table = {} | |
82 | ||
83 | def __init__(self, cmd_name, only_post=False): | |
84 | assert not cmd_name in self._cmd_table | |
85 | self.cmd_name = cmd_name | |
86 | self.only_post = only_post | |
87 | ||
88 | def __call__(self, to_be_wrapped): | |
89 | assert not self.cmd_name in self._cmd_table | |
90 | self._cmd_table[self.cmd_name] = (to_be_wrapped, self.only_post) | |
91 | return to_be_wrapped | |
92 | ||
93 | @classmethod | |
94 | def find_func(cls, request): | |
95 | if request.method == "GET": | |
96 | cmd_name = request.args.get("method") | |
97 | else: | |
98 | cmd_name = request.form.get("method") | |
99 | entry = cls._cmd_table.get(cmd_name) | |
100 | if not entry: | |
101 | return entry | |
cf0816c1 | 102 | _log.debug("Found method %s", cmd_name) |
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103 | func, only_post = entry |
104 | if only_post and request.method != "POST": | |
105 | _log.warn("Method %s only allowed for POST", cmd_name) | |
106 | raise MethodNotAllowed() | |
107 | return func |