Mercurial > kallithea
annotate rhodecode/controllers/api/__init__.py @ 1693:60249224be04 beta
fix for api key lookup, reuse same function in user model
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Thu, 17 Nov 2011 18:52:48 +0200 |
parents | fe5575f95850 |
children | fee9895fa46e |
rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 """ |
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3 rhodecode.controllers.api |
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4 ~~~~~~~~~~~~~~~~~~~~~~~~~ |
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5 |
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6 JSON RPC controller |
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7 |
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8 :created_on: Aug 20, 2011 |
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9 :author: marcink |
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10 :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com> |
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11 :license: GPLv3, see COPYING for more details. |
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12 """ |
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13 # This program is free software; you can redistribute it and/or |
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14 # modify it under the terms of the GNU General Public License |
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15 # as published by the Free Software Foundation; version 2 |
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16 # of the License or (at your opinion) any later version of the license. |
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17 # |
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18 # This program is distributed in the hope that it will be useful, |
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19 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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21 # GNU General Public License for more details. |
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22 # |
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23 # You should have received a copy of the GNU General Public License |
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24 # along with this program; if not, write to the Free Software |
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25 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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26 # MA 02110-1301, USA. |
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27 |
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28 import inspect |
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29 import logging |
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30 import types |
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31 import urllib |
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32 import traceback |
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33 |
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34 from rhodecode.lib.compat import izip_longest, json |
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35 |
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36 from paste.response import replace_header |
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37 |
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38 from pylons.controllers import WSGIController |
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39 |
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40 |
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41 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \ |
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42 HTTPBadRequest, HTTPError |
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43 |
1489 | 44 from rhodecode.model.db import User |
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45 from rhodecode.lib.auth import AuthUser |
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46 |
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47 log = logging.getLogger('JSONRPC') |
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48 |
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49 class JSONRPCError(BaseException): |
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50 |
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51 def __init__(self, message): |
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52 self.message = message |
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53 |
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54 def __str__(self): |
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55 return str(self.message) |
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56 |
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57 |
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58 def jsonrpc_error(message, code=None): |
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59 """ |
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60 Generate a Response object with a JSON-RPC error body |
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61 """ |
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62 from pylons.controllers.util import Response |
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63 resp = Response(body=json.dumps(dict(result=None, error=message)), |
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64 status=code, |
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65 content_type='application/json') |
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66 return resp |
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67 |
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68 |
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69 |
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70 class JSONRPCController(WSGIController): |
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71 """ |
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72 A WSGI-speaking JSON-RPC controller class |
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73 |
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74 See the specification: |
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75 <http://json-rpc.org/wiki/specification>`. |
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76 |
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77 Valid controller return values should be json-serializable objects. |
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78 |
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79 Sub-classes should catch their exceptions and raise JSONRPCError |
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80 if they want to pass meaningful errors to the client. |
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81 |
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82 """ |
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83 |
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84 def _get_method_args(self): |
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85 """ |
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86 Return `self._rpc_args` to dispatched controller method |
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87 chosen by __call__ |
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88 """ |
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89 return self._rpc_args |
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90 |
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91 def __call__(self, environ, start_response): |
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92 """ |
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93 Parse the request body as JSON, look up the method on the |
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94 controller and if it exists, dispatch to it. |
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95 """ |
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96 if 'CONTENT_LENGTH' not in environ: |
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97 log.debug("No Content-Length") |
1489 | 98 return jsonrpc_error(message="No Content-Length in request") |
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99 else: |
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100 length = environ['CONTENT_LENGTH'] or 0 |
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101 length = int(environ['CONTENT_LENGTH']) |
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102 log.debug('Content-Length: %s', length) |
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103 |
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104 if length == 0: |
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105 log.debug("Content-Length is 0") |
1489 | 106 return jsonrpc_error(message="Content-Length is 0") |
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107 |
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108 raw_body = environ['wsgi.input'].read(length) |
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109 |
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110 try: |
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111 json_body = json.loads(urllib.unquote_plus(raw_body)) |
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112 except ValueError, e: |
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113 #catch JSON errors Here |
1489 | 114 return jsonrpc_error(message="JSON parse error ERR:%s RAW:%r" \ |
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115 % (e, urllib.unquote_plus(raw_body))) |
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116 |
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117 # check AUTH based on API KEY |
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118 try: |
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119 self._req_api_key = json_body['api_key'] |
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120 self._req_method = json_body['method'] |
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121 self._req_params = json_body['args'] |
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122 log.debug('method: %s, params: %s', |
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123 self._req_method, |
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124 self._req_params) |
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125 except KeyError, e: |
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126 return jsonrpc_error(message='Incorrect JSON query missing %s' % e) |
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127 |
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128 # check if we can find this session using api_key |
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129 try: |
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130 u = User.get_by_api_key(self._req_api_key) |
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131 if u is None: |
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132 return jsonrpc_error(message='Invalid API KEY') |
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133 auth_u = AuthUser(u.user_id, self._req_api_key) |
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134 except Exception, e: |
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135 return jsonrpc_error(message='Invalid API KEY') |
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136 |
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137 self._error = None |
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138 try: |
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139 self._func = self._find_method() |
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140 except AttributeError, e: |
1489 | 141 return jsonrpc_error(message=str(e)) |
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142 |
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143 # now that we have a method, add self._req_params to |
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144 # self.kargs and dispatch control to WGIController |
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145 argspec = inspect.getargspec(self._func) |
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146 arglist = argspec[0][1:] |
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147 defaults = argspec[3] or [] |
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148 default_empty = types.NotImplementedType |
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149 |
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150 kwarglist = list(izip_longest(reversed(arglist), reversed(defaults), |
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151 fillvalue=default_empty)) |
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152 |
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153 # this is little trick to inject logged in user for |
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154 # perms decorators to work they expect the controller class to have |
1500 | 155 # rhodecode_user attribute set |
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156 self.rhodecode_user = auth_u |
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157 |
1500 | 158 # This attribute will need to be first param of a method that uses |
159 # api_key, which is translated to instance of user at that name | |
160 USER_SESSION_ATTR = 'apiuser' | |
161 | |
162 if USER_SESSION_ATTR not in arglist: | |
1489 | 163 return jsonrpc_error(message='This method [%s] does not support ' |
1500 | 164 'authentication (missing %s param)' % |
165 (self._func.__name__, USER_SESSION_ATTR)) | |
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166 |
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167 # get our arglist and check if we provided them as args |
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168 for arg, default in kwarglist: |
1500 | 169 if arg == USER_SESSION_ATTR: |
170 # USER_SESSION_ATTR is something translated from api key and | |
171 # this is checked before so we don't need validate it | |
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172 continue |
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173 |
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174 # skip the required param check if it's default value is |
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175 # NotImplementedType (default_empty) |
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176 if not self._req_params or (type(default) == default_empty |
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177 and arg not in self._req_params): |
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178 return jsonrpc_error(message=('Missing non optional %s arg ' |
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179 'in JSON DATA') % arg) |
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180 |
1500 | 181 self._rpc_args = {USER_SESSION_ATTR:u} |
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182 self._rpc_args.update(self._req_params) |
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183 |
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184 self._rpc_args['action'] = self._req_method |
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185 self._rpc_args['environ'] = environ |
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186 self._rpc_args['start_response'] = start_response |
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187 |
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188 status = [] |
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189 headers = [] |
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190 exc_info = [] |
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191 def change_content(new_status, new_headers, new_exc_info=None): |
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192 status.append(new_status) |
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193 headers.extend(new_headers) |
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194 exc_info.append(new_exc_info) |
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195 |
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196 output = WSGIController.__call__(self, environ, change_content) |
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197 output = list(output) |
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198 headers.append(('Content-Length', str(len(output[0])))) |
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199 replace_header(headers, 'Content-Type', 'application/json') |
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200 start_response(status[0], headers, exc_info[0]) |
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201 |
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202 return output |
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203 |
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204 def _dispatch_call(self): |
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205 """ |
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206 Implement dispatch interface specified by WSGIController |
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207 """ |
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208 try: |
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209 raw_response = self._inspect_call(self._func) |
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210 if isinstance(raw_response, HTTPError): |
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211 self._error = str(raw_response) |
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212 except JSONRPCError, e: |
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213 self._error = str(e) |
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214 except Exception, e: |
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215 log.error('Encountered unhandled exception: %s' \ |
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216 % traceback.format_exc()) |
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217 json_exc = JSONRPCError('Internal server error') |
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218 self._error = str(json_exc) |
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219 |
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220 if self._error is not None: |
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221 raw_response = None |
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222 |
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223 response = dict(result=raw_response, error=self._error) |
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224 |
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225 try: |
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226 return json.dumps(response) |
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227 except TypeError, e: |
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228 log.debug('Error encoding response: %s', e) |
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229 return json.dumps(dict(result=None, |
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230 error="Error encoding response")) |
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231 |
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232 def _find_method(self): |
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233 """ |
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234 Return method named by `self._req_method` in controller if able |
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235 """ |
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236 log.debug('Trying to find JSON-RPC method: %s', self._req_method) |
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237 if self._req_method.startswith('_'): |
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238 raise AttributeError("Method not allowed") |
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239 |
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240 try: |
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241 func = getattr(self, self._req_method, None) |
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242 except UnicodeEncodeError: |
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243 raise AttributeError("Problem decoding unicode in requested " |
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244 "method name.") |
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245 |
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246 if isinstance(func, types.MethodType): |
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247 return func |
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248 else: |
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249 raise AttributeError("No such method: %s" % self._req_method) |
1500 | 250 |