Mercurial > kallithea
annotate rhodecode/controllers/api/__init__.py @ 1445:c78f6bf52e9c beta
Beginning of API implementation for rhodecode
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sat, 20 Aug 2011 18:13:54 +0300 |
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children | b951731f2143 |
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 json |
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30 import logging |
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31 import types |
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32 import urllib |
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33 |
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34 from paste.response import replace_header |
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35 |
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36 from pylons.controllers import WSGIController |
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37 from pylons.controllers.util import Response |
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38 |
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39 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \ |
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40 HTTPBadRequest, HTTPError |
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41 |
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42 from rhodecode.model.user import User |
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43 from rhodecode.lib.auth import AuthUser |
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44 |
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45 log = logging.getLogger('JSONRPC') |
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46 |
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47 class JSONRPCError(BaseException): |
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48 |
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49 def __init__(self, message): |
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50 self.message = message |
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51 |
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52 def __str__(self): |
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53 return str(self.message) |
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54 |
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55 |
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56 def jsonrpc_error(message, code=None): |
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57 """Generate a Response object with a JSON-RPC error body""" |
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58 return Response(body=json.dumps(dict(result=None, |
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59 error=message))) |
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60 |
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61 |
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62 class JSONRPCController(WSGIController): |
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63 """ |
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64 A WSGI-speaking JSON-RPC controller class |
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65 |
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66 See the specification: |
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67 <http://json-rpc.org/wiki/specification>`. |
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68 |
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69 Valid controller return values should be json-serializable objects. |
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70 |
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71 Sub-classes should catch their exceptions and raise JSONRPCError |
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72 if they want to pass meaningful errors to the client. |
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73 |
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74 """ |
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75 |
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76 def _get_method_args(self): |
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77 """ |
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78 Return `self._rpc_args` to dispatched controller method |
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79 chosen by __call__ |
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80 """ |
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81 return self._rpc_args |
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82 |
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83 def __call__(self, environ, start_response): |
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84 """ |
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85 Parse the request body as JSON, look up the method on the |
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86 controller and if it exists, dispatch to it. |
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87 """ |
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88 |
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89 if 'CONTENT_LENGTH' not in environ: |
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90 log.debug("No Content-Length") |
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91 return jsonrpc_error(0, "No Content-Length") |
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92 else: |
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93 length = environ['CONTENT_LENGTH'] or 0 |
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94 length = int(environ['CONTENT_LENGTH']) |
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95 log.debug('Content-Length: %s', length) |
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96 |
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97 if length == 0: |
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98 log.debug("Content-Length is 0") |
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99 return jsonrpc_error(0, "Content-Length is 0") |
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100 |
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101 raw_body = environ['wsgi.input'].read(length) |
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102 |
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103 try: |
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104 json_body = json.loads(urllib.unquote_plus(raw_body)) |
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105 except ValueError as e: |
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106 #catch JSON errors Here |
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107 return jsonrpc_error("JSON parse error ERR:%s RAW:%r" \ |
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108 % (e, urllib.unquote_plus(raw_body))) |
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109 |
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110 |
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111 #check AUTH based on API KEY |
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112 |
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113 try: |
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114 self._req_api_key = json_body['api_key'] |
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115 self._req_method = json_body['method'] |
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116 self._req_params = json_body['args'] |
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117 log.debug('method: %s, params: %s', |
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118 self._req_method, |
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119 self._req_params) |
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120 except KeyError as e: |
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121 return jsonrpc_error(message='Incorrect JSON query missing %s' % e) |
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122 |
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123 #check if we can find this session using api_key |
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124 try: |
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125 u = User.get_by_api_key(self._req_api_key) |
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126 auth_u = AuthUser(u.user_id, self._req_api_key) |
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127 except Exception as e: |
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128 return jsonrpc_error(message='Invalid API KEY') |
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129 |
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130 self._error = None |
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131 try: |
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132 self._func = self._find_method() |
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133 except AttributeError, e: |
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134 return jsonrpc_error(str(e)) |
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135 |
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136 # now that we have a method, add self._req_params to |
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137 # self.kargs and dispatch control to WGIController |
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138 arglist = inspect.getargspec(self._func)[0][1:] |
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139 |
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140 # this is little trick to inject logged in user for |
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141 # perms decorators to work they expect the controller class to have |
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142 # rhodecode_user set |
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143 self.rhodecode_user = auth_u |
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144 |
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145 if 'user' not in arglist: |
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146 return jsonrpc_error('This method [%s] does not support ' |
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147 'authentication (missing user param)' % |
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148 self._func.__name__) |
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149 |
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150 # get our arglist and check if we provided them as args |
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151 for arg in arglist: |
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152 if arg == 'user': |
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153 # user is something translated from api key and this is |
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154 # checked before |
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155 continue |
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156 |
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157 if not self._req_params or arg not in self._req_params: |
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158 return jsonrpc_error('Missing %s arg in JSON DATA' % arg) |
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159 |
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160 self._rpc_args = dict(user=u) |
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161 self._rpc_args.update(self._req_params) |
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162 |
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163 self._rpc_args['action'] = self._req_method |
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164 self._rpc_args['environ'] = environ |
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165 self._rpc_args['start_response'] = start_response |
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166 |
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167 status = [] |
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168 headers = [] |
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169 exc_info = [] |
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170 def change_content(new_status, new_headers, new_exc_info=None): |
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171 status.append(new_status) |
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172 headers.extend(new_headers) |
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173 exc_info.append(new_exc_info) |
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174 |
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175 output = WSGIController.__call__(self, environ, change_content) |
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176 output = list(output) |
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177 headers.append(('Content-Length', str(len(output[0])))) |
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178 replace_header(headers, 'Content-Type', 'application/json') |
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179 start_response(status[0], headers, exc_info[0]) |
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180 |
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181 return output |
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182 |
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183 def _dispatch_call(self): |
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184 """ |
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185 Implement dispatch interface specified by WSGIController |
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186 """ |
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187 try: |
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188 raw_response = self._inspect_call(self._func) |
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189 print raw_response |
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190 if isinstance(raw_response, HTTPError): |
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191 self._error = str(raw_response) |
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192 except JSONRPCError as e: |
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193 self._error = str(e) |
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194 except Exception as e: |
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195 log.debug('Encountered unhandled exception: %s', repr(e)) |
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196 json_exc = JSONRPCError('Internal server error') |
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197 self._error = str(json_exc) |
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198 |
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199 if self._error is not None: |
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200 raw_response = None |
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201 |
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202 response = dict(result=raw_response, error=self._error) |
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203 |
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204 try: |
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205 return json.dumps(response) |
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206 except TypeError, e: |
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207 log.debug('Error encoding response: %s', e) |
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208 return json.dumps(dict(result=None, |
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209 error="Error encoding response")) |
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210 |
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211 def _find_method(self): |
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212 """ |
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213 Return method named by `self._req_method` in controller if able |
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214 """ |
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215 log.debug('Trying to find JSON-RPC method: %s', self._req_method) |
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216 if self._req_method.startswith('_'): |
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217 raise AttributeError("Method not allowed") |
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218 |
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219 try: |
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220 func = getattr(self, self._req_method, None) |
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221 except UnicodeEncodeError: |
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222 raise AttributeError("Problem decoding unicode in requested " |
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223 "method name.") |
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224 |
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225 if isinstance(func, types.MethodType): |
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226 return func |
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227 else: |
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228 raise AttributeError("No such method: %s" % self._req_method) |