osm_nbi/validation.py

   1 # -*- coding: utf-8 -*-
   2
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #    http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  12 # implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 from jsonschema import validate as js_v, exceptions as js_e
  17 from http import HTTPStatus
  18 from copy import deepcopy
  19
  20 __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>"
  21 __version__ = "0.1"
  22 version_date = "Mar 2018"
  23
  24 """
  25 Validator of input data using JSON schemas for those items that not contains an  OSM yang information model
  26 """
  27
  28 # Basis schemas
  29 patern_name = "^[ -~]+$"
  30 nameshort_schema = {"type": "string", "minLength": 1, "maxLength": 60, "pattern": "^[^,;()\\.\\$'\"]+$"}
  31 passwd_schema = {"type": "string", "minLength": 1, "maxLength": 60}
  32 name_schema = {"type": "string", "minLength": 1, "maxLength": 255, "pattern": "^[^,;()'\"]+$"}
  33 string_schema = {"type": "string", "minLength": 1, "maxLength": 255}
  34 xml_text_schema = {"type": "string", "minLength": 1, "maxLength": 1000, "pattern": "^[^']+$"}
  35 description_schema = {"type": ["string", "null"], "maxLength": 255, "pattern": "^[^'\"]+$"}
  36 id_schema_fake = {"type": "string", "minLength": 2, "maxLength": 36}
  37 bool_schema = {"type": "boolean"}
  38 null_schema = {"type": "null"}
  39 # "pattern": "^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$"
  40 id_schema = {"type": "string", "pattern": "^[a-fA-F0-9]{8}(-[a-fA-F0-9]{4}){3}-[a-fA-F0-9]{12}$"}
  41 time_schema = {"type": "string", "pattern": "^[0-9]{4}-[0-1][0-9]-[0-3][0-9]T[0-2][0-9]([0-5]:){2}"}
  42 pci_schema = {"type": "string", "pattern": "^[0-9a-fA-F]{4}(:[0-9a-fA-F]{2}){2}\\.[0-9a-fA-F]$"}
  43 # allows [] for wildcards. For that reason huge length limit is set
  44 pci_extended_schema = {"type": "string", "pattern": "^[0-9a-fA-F.:-\\[\\]]{12,40}$"}
  45 http_schema = {"type": "string", "pattern": "^https?://[^'\"=]+$"}
  46 bandwidth_schema = {"type": "string", "pattern": "^[0-9]+ *([MG]bps)?$"}
  47 memory_schema = {"type": "string", "pattern": "^[0-9]+ *([MG]i?[Bb])?$"}
  48 integer0_schema = {"type": "integer", "minimum": 0}
  49 integer1_schema = {"type": "integer", "minimum": 1}
  50 path_schema = {"type": "string", "pattern": "^(\\.){0,2}(/[^/\"':{}\\(\\)]+)+$"}
  51 vlan_schema = {"type": "integer", "minimum": 1, "maximum": 4095}
  52 vlan1000_schema = {"type": "integer", "minimum": 1000, "maximum": 4095}
  53 mac_schema = {"type": "string",
  54               "pattern": "^[0-9a-fA-F][02468aceACE](:[0-9a-fA-F]{2}){5}$"}  # must be unicast: LSB bit of MSB byte ==0
  55 dpid_Schema = {"type": "string", "pattern": "^[0-9a-fA-F]{2}(:[0-9a-fA-F]{2}){7}$"}
  56 # mac_schema={"type":"string", "pattern":"^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$"}
  57 ip_schema = {"type": "string",
  58              "pattern": "^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"}
  59 ip_prefix_schema = {"type": "string",
  60                     "pattern": "^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}"
  61                                "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/(30|[12]?[0-9])$"}
  62 port_schema = {"type": "integer", "minimum": 1, "maximum": 65534}
  63 object_schema = {"type": "object"}
  64 schema_version_2 = {"type": "integer", "minimum": 2, "maximum": 2}
  65 # schema_version_string={"type":"string","enum": ["0.1", "2", "0.2", "3", "0.3"]}
  66 log_level_schema = {"type": "string", "enum": ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]}
  67 checksum_schema = {"type": "string", "pattern": "^[0-9a-fA-F]{32}$"}
  68 size_schema = {"type": "integer", "minimum": 1, "maximum": 100}
  69 array_edition_schema = {
  70     "type": "object",
  71     "patternProperties": {
  72         "^\\$": "Any"
  73     },
  74     "additionalProperties": False,
  75     "minProperties": 1,
  76 }
  77 nameshort_list_schema = {
  78     "type": "array",
  79     "minItems": 1,
  80     "items": nameshort_schema,
  81 }
  82
  83
  84 ns_instantiate_vdu = {
  85     "title": "ns action instantiate input schema for vdu",
  86     "$schema": "http://json-schema.org/draft-04/schema#",
  87     "type": "object",
  88     "properties": {
  89         "id": name_schema,
  90         "volume": {
  91             "type": "array",
  92             "minItems": 1,
  93             "items": {
  94                 "type": "object",
  95                 "properties": {
  96                     "name": name_schema,
  97                     "vim-volume-id": name_schema,
  98                 },
  99                 "required": ["name", "vim-volume-id"],
 100                 "additionalProperties": False
 101             }
 102         },
 103         "interface": {
 104             "type": "array",
 105             "minItems": 1,
 106             "items": {
 107                 "type": "object",
 108                 "properties": {
 109                     "name": name_schema,
 110                     "ip-address": ip_schema,
 111                     "mac-address": mac_schema,
 112                     "floating-ip-required": bool_schema,
 113                 },
 114                 "required": ["name"],
 115                 "additionalProperties": False
 116             }
 117         }
 118     },
 119     "required": ["id"],
 120     "additionalProperties": False
 121 }
 122
 123 ip_profile_dns_schema = {
 124     "type": "array",
 125     "minItems": 1,
 126     "items": {
 127         "type": "object",
 128         "properties": {
 129             "address": ip_schema,
 130         },
 131         "required": ["address"],
 132         "additionalProperties": False
 133     }
 134 }
 135
 136 ip_profile_dhcp_schema = {
 137     "type": "object",
 138     "properties": {
 139         "enabled": {"type": "boolean"},
 140         "count": integer1_schema,
 141         "start-address": ip_schema
 142     },
 143     "additionalProperties": False,
 144 }
 145
 146 ip_profile_schema = {
 147     "title": "ip profile validation schame",
 148     "$schema": "http://json-schema.org/draft-04/schema#",
 149     "type": "object",
 150     "properties": {
 151         "ip-version": {"enum": ["ipv4", "ipv6"]},
 152         "subnet-address": ip_prefix_schema,
 153         "gateway-address": ip_schema,
 154         "dns-server": ip_profile_dns_schema,
 155         "dhcp-params": ip_profile_dhcp_schema,
 156     }
 157 }
 158
 159 ip_profile_update_schema = {
 160     "title": "ip profile validation schame",
 161     "$schema": "http://json-schema.org/draft-04/schema#",
 162     "type": "object",
 163     "properties": {
 164         "ip-version": {"enum": ["ipv4", "ipv6"]},
 165         "subnet-address": {"oneOf": [null_schema, ip_prefix_schema]},
 166         "gateway-address": {"oneOf": [null_schema, ip_schema]},
 167         "dns-server": {"oneOf": [null_schema, ip_profile_dns_schema]},
 168
 169         "dhcp-params": {"oneOf": [null_schema, ip_profile_dhcp_schema]},
 170     },
 171     "additionalProperties": False
 172 }
 173
 174 ns_instantiate_internal_vld = {
 175     "title": "ns action instantiate input schema for vdu",
 176     "$schema": "http://json-schema.org/draft-04/schema#",
 177     "type": "object",
 178     "properties": {
 179         "name": name_schema,
 180         "vim-network-name": name_schema,
 181         "ip-profile": ip_profile_update_schema,
 182         "internal-connection-point": {
 183             "type": "array",
 184             "minItems": 1,
 185             "items": {
 186                 "type": "object",
 187                 "properties": {
 188                     "id-ref": name_schema,
 189                     "ip-address": ip_schema,
 190                     # "mac-address": mac_schema,
 191                 },
 192                 "required": ["id-ref"],
 193                 "minProperties": 2,
 194                 "additionalProperties": False
 195             },
 196         }
 197     },
 198     "required": ["name"],
 199     "minProperties": 2,
 200     "additionalProperties": False
 201 }
 202
 203 ns_instantiate = {
 204     "title": "ns action instantiate input schema",
 205     "$schema": "http://json-schema.org/draft-04/schema#",
 206     "type": "object",
 207     "properties": {
 208         "lcmOperationType": string_schema,
 209         "nsInstanceId": id_schema,
 210         "netsliceInstanceId": id_schema,
 211         "nsName": name_schema,
 212         "nsDescription": {"oneOf": [description_schema, {"type": "null"}]},
 213         "nsdId": id_schema,
 214         "vimAccountId": id_schema,
 215         "ssh_keys": {"type": "array", "items": {"type": "string"}},
 216         "nsr_id": id_schema,
 217         "vduImage": name_schema,
 218         "vnf": {
 219             "type": "array",
 220             "minItems": 1,
 221             "items": {
 222                 "type": "object",
 223                 "properties": {
 224                     "member-vnf-index": name_schema,
 225                     "vimAccountId": id_schema,
 226                     "vdu": {
 227                         "type": "array",
 228                         "minItems": 1,
 229                         "items": ns_instantiate_vdu,
 230                     },
 231                     "internal-vld": {
 232                         "type": "array",
 233                         "minItems": 1,
 234                         "items": ns_instantiate_internal_vld
 235                     }
 236                 },
 237                 "required": ["member-vnf-index"],
 238                 "minProperties": 2,
 239                 "additionalProperties": False
 240             }
 241         },
 242         "vld": {
 243             "type": "array",
 244             "minItems": 1,
 245             "items": {
 246                 "type": "object",
 247                 "properties": {
 248                     "name": string_schema,
 249                     "vim-network-name": {"OneOf": [string_schema, object_schema]},
 250                     "ip-profile": object_schema,
 251                     "vnfd-connection-point-ref": {
 252                         "type": "array",
 253                         "minItems": 1,
 254                         "items": {
 255                             "type": "object",
 256                             "properties": {
 257                                 "member-vnf-index-ref": name_schema,
 258                                 "vnfd-connection-point-ref": name_schema,
 259                                 "ip-address": ip_schema,
 260                                 # "mac-address": mac_schema,
 261                             },
 262                             "required": ["member-vnf-index-ref", "vnfd-connection-point-ref"],
 263                             "minProperties": 3,
 264                             "additionalProperties": False
 265                         },
 266                     }
 267                 },
 268                 "required": ["name"],
 269                 "additionalProperties": False
 270             }
 271         },
 272     },
 273     "required": ["nsName", "nsdId", "vimAccountId"],
 274     "additionalProperties": False
 275 }
 276
 277 ns_action = {   # TODO for the moment it is only contemplated the vnfd primitive execution
 278     "title": "ns action input schema",
 279     "$schema": "http://json-schema.org/draft-04/schema#",
 280     "type": "object",
 281     "properties": {
 282         "lcmOperationType": string_schema,
 283         "nsInstanceId": id_schema,
 284         "member_vnf_index": name_schema,
 285         "vnf_member_index": name_schema,  # TODO for backward compatibility. To remove in future
 286         "vdu_id": name_schema,
 287         "primitive": name_schema,
 288         "primitive_params": {"type": "object"},
 289     },
 290     "required": ["primitive", "primitive_params"],   # TODO add member_vnf_index
 291     "additionalProperties": False
 292 }
 293 ns_scale = {   # TODO for the moment it is only VDU-scaling
 294     "title": "ns scale input schema",
 295     "$schema": "http://json-schema.org/draft-04/schema#",
 296     "type": "object",
 297     "properties": {
 298         "lcmOperationType": string_schema,
 299         "nsInstanceId": id_schema,
 300         "scaleType": {"enum": ["SCALE_VNF"]},
 301         "scaleVnfData": {
 302             "type": "object",
 303             "properties": {
 304                 "vnfInstanceId": name_schema,
 305                 "scaleVnfType": {"enum": ["SCALE_OUT", 'SCALE_IN']},
 306                 "scaleByStepData": {
 307                     "type": "object",
 308                     "properties": {
 309                         "scaling-group-descriptor": name_schema,
 310                         "member-vnf-index": name_schema,
 311                         "scaling-policy": name_schema,
 312                     },
 313                     "required": ["scaling-group-descriptor", "member-vnf-index"],
 314                     "additionalProperties": False
 315                 },
 316             },
 317             "required": ["scaleVnfType", "scaleByStepData"],  # vnfInstanceId
 318             "additionalProperties": False
 319         },
 320         "scaleTime": time_schema,
 321     },
 322     "required": ["scaleType", "scaleVnfData"],
 323     "additionalProperties": False
 324 }
 325
 326
 327 schema_version = {"type": "string", "enum": ["1.0"]}
 328 vim_account_edit_schema = {
 329     "title": "vim_account edit input schema",
 330     "$schema": "http://json-schema.org/draft-04/schema#",
 331     "type": "object",
 332     "properties": {
 333         "name": name_schema,
 334         "description": description_schema,
 335         "type": nameshort_schema,  # currently "openvim" or "openstack", can be enlarged with plugins
 336         "vim": name_schema,
 337         "datacenter": name_schema,
 338         "vim_url": description_schema,
 339         "vim_url_admin": description_schema,
 340         "vim_tenant": name_schema,
 341         "vim_tenant_name": name_schema,
 342         "vim_username": nameshort_schema,
 343         "vim_password": passwd_schema,
 344         "config": {"type": "object"}
 345     },
 346     "additionalProperties": False
 347 }
 348 schema_type = {"type": "string"}
 349
 350 vim_account_new_schema = {
 351     "title": "vim_account creation input schema",
 352     "$schema": "http://json-schema.org/draft-04/schema#",
 353     "type": "object",
 354     "properties": {
 355         "schema_version": schema_version,
 356         "schema_type": schema_type,
 357         "name": name_schema,
 358         "description": description_schema,
 359         "vim": name_schema,
 360         "datacenter": name_schema,
 361         "vim_type": {"enum": ["openstack", "openvim", "vmware", "opennebula", "aws"]},
 362         "vim_url": description_schema,
 363         # "vim_url_admin": description_schema,
 364         # "vim_tenant": name_schema,
 365         "vim_tenant_name": name_schema,
 366         "vim_user": nameshort_schema,
 367         "vim_password": passwd_schema,
 368         "config": {"type": "object"}
 369     },
 370     "required": ["name", "vim_url", "vim_type", "vim_user", "vim_password", "vim_tenant_name"],
 371     "additionalProperties": False
 372 }
 373
 374
 375 sdn_properties = {
 376     "name": name_schema,
 377     "description": description_schema,
 378     "dpid": dpid_Schema,
 379     "ip": ip_schema,
 380     "port": port_schema,
 381     "type": {"type": "string", "enum": ["opendaylight", "floodlight", "onos"]},
 382     "version": {"type": "string", "minLength": 1, "maxLength": 12},
 383     "user": nameshort_schema,
 384     "password": passwd_schema
 385 }
 386 sdn_new_schema = {
 387     "title": "sdn controller information schema",
 388     "$schema": "http://json-schema.org/draft-04/schema#",
 389     "type": "object",
 390     "properties": sdn_properties,
 391     "required": ["name", "port", 'ip', 'dpid', 'type'],
 392     "additionalProperties": False
 393 }
 394 sdn_edit_schema = {
 395     "title": "sdn controller update information schema",
 396     "$schema": "http://json-schema.org/draft-04/schema#",
 397     "type": "object",
 398     "properties": sdn_properties,
 399     # "required": ["name", "port", 'ip', 'dpid', 'type'],
 400     "additionalProperties": False
 401 }
 402 sdn_port_mapping_schema = {
 403     "$schema": "http://json-schema.org/draft-04/schema#",
 404     "title": "sdn port mapping information schema",
 405     "type": "array",
 406     "items": {
 407         "type": "object",
 408         "properties": {
 409             "compute_node": nameshort_schema,
 410             "ports": {
 411                 "type": "array",
 412                 "items": {
 413                     "type": "object",
 414                     "properties": {
 415                         "pci": pci_extended_schema,
 416                         "switch_port": nameshort_schema,
 417                         "switch_mac": mac_schema
 418                     },
 419                     "required": ["pci"]
 420                 }
 421             }
 422         },
 423         "required": ["compute_node", "ports"]
 424     }
 425 }
 426 sdn_external_port_schema = {
 427     "$schema": "http://json-schema.org/draft-04/schema#",
 428     "title": "External port information",
 429     "type": "object",
 430     "properties": {
 431         "port": {"type": "string", "minLength": 1, "maxLength": 60},
 432         "vlan": vlan_schema,
 433         "mac": mac_schema
 434     },
 435     "required": ["port"]
 436 }
 437
 438 # PDUs
 439 pdu_interface = {
 440     "type": "object",
 441     "properties": {
 442         "name": nameshort_schema,
 443         "mgmt": bool_schema,
 444         "type": {"enum": ["overlay", 'underlay']},
 445         "ip-address": ip_schema,
 446         # TODO, add user, password, ssh-key
 447         "mac-address": mac_schema,
 448         "vim-network-name": nameshort_schema,  # interface is connected to one vim network, or switch port
 449         # TODO "vim-network-id": nameshort_schema,
 450         # # provide this in case SDN assist must deal with this interface
 451         # "switch-dpid": dpid_Schema,
 452         # "switch-port": nameshort_schema,
 453         # "switch-mac": nameshort_schema,
 454         # "switch-vlan": vlan_schema,
 455     },
 456     "required": ["name", "mgmt", "ip-address"],
 457     "additionalProperties": False
 458 }
 459 pdu_new_schema = {
 460     "title": "pdu creation input schema",
 461     "$schema": "http://json-schema.org/draft-04/schema#",
 462     "type": "object",
 463     "properties": {
 464         "name": nameshort_schema,
 465         "type": nameshort_schema,
 466         "description": description_schema,
 467         "shared": bool_schema,
 468         "vims": nameshort_list_schema,
 469         "vim_accounts": nameshort_list_schema,
 470         "interfaces": {
 471             "type": "array",
 472             "items": pdu_interface,
 473             "minItems": 1
 474         }
 475     },
 476     "required": ["name", "type", "interfaces"],
 477     "additionalProperties": False
 478 }
 479
 480 pdu_edit_schema = {
 481     "title": "pdu edit input schema",
 482     "$schema": "http://json-schema.org/draft-04/schema#",
 483     "type": "object",
 484     "properties": {
 485         "name": nameshort_schema,
 486         "type": nameshort_schema,
 487         "description": description_schema,
 488         "shared": bool_schema,
 489         "vims": {"oneOf": [array_edition_schema, nameshort_list_schema]},
 490         "vim_accounts": {"oneOf": [array_edition_schema, nameshort_list_schema]},
 491         "interfaces": {"oneOf": [
 492             array_edition_schema,
 493             {
 494                 "type": "array",
 495                 "items": pdu_interface,
 496                 "minItems": 1
 497             }
 498         ]}
 499     },
 500     "additionalProperties": False,
 501     "minProperties": 1
 502 }
 503
 504 # USERS
 505 user_new_schema = {
 506     "$schema": "http://json-schema.org/draft-04/schema#",
 507     "title": "New user schema",
 508     "type": "object",
 509     "properties": {
 510         "username": nameshort_schema,
 511         "password": passwd_schema,
 512         "projects": nameshort_list_schema,
 513     },
 514     "required": ["username", "password", "projects"],
 515     "additionalProperties": False
 516 }
 517 user_edit_schema = {
 518     "$schema": "http://json-schema.org/draft-04/schema#",
 519     "title": "User edit schema for administrators",
 520     "type": "object",
 521     "properties": {
 522         "password": passwd_schema,
 523         "projects": {
 524             "oneOf": [
 525                 nameshort_list_schema,
 526                 array_edition_schema
 527             ]
 528         },
 529     },
 530     "minProperties": 1,
 531     "additionalProperties": False
 532 }
 533
 534 # PROJECTS
 535 project_new_schema = {
 536     "$schema": "http://json-schema.org/draft-04/schema#",
 537     "title": "New project schema for administrators",
 538     "type": "object",
 539     "properties": {
 540         "name": nameshort_schema,
 541         "admin": bool_schema,
 542     },
 543     "required": ["name"],
 544     "additionalProperties": False
 545 }
 546 project_edit_schema = {
 547     "$schema": "http://json-schema.org/draft-04/schema#",
 548     "title": "Project edit schema for administrators",
 549     "type": "object",
 550     "properties": {
 551         "admin": bool_schema,
 552     },
 553     "additionalProperties": False,
 554     "minProperties": 1
 555 }
 556
 557 # GLOBAL SCHEMAS
 558
 559 nbi_new_input_schemas = {
 560     "users": user_new_schema,
 561     "projects": project_new_schema,
 562     "vim_accounts": vim_account_new_schema,
 563     "sdns": sdn_new_schema,
 564     "ns_instantiate": ns_instantiate,
 565     "ns_action": ns_action,
 566     "ns_scale": ns_scale,
 567     "pdus": pdu_new_schema,
 568 }
 569
 570 nbi_edit_input_schemas = {
 571     "users": user_edit_schema,
 572     "projects": project_edit_schema,
 573     "vim_accounts": vim_account_edit_schema,
 574     "sdns": sdn_edit_schema,
 575     "pdus": pdu_edit_schema,
 576 }
 577
 578 # NETSLICE SCHEMAS
 579 nsi_slice_instantiate = deepcopy(ns_instantiate)
 580 nsi_slice_instantiate["title"] = "netslice subnet instantiation params input schema"
 581 nsi_slice_instantiate["properties"]["id"] = name_schema
 582 del nsi_slice_instantiate["required"]
 583
 584 nsi_vld_instantiate = {
 585     "title": "netslice vld instantiation params input schema",
 586     "$schema": "http://json-schema.org/draft-04/schema#",
 587     "type": "object",
 588     "properties": {
 589         "name": string_schema,
 590         "vim-network-name": {"OneOf": [string_schema, object_schema]},
 591         "ip-profile": object_schema,
 592     },
 593     "required": ["name"],
 594     "additionalProperties": False
 595 }
 596
 597 nsi_instantiate = {
 598     "title": "netslice action instantiate input schema",
 599     "$schema": "http://json-schema.org/draft-04/schema#",
 600     "type": "object",
 601     "properties": {
 602         "lcmOperationType": string_schema,
 603         "nsiInstanceId": id_schema,
 604         "nsiName": name_schema,
 605         "nsiDescription": {"oneOf": [description_schema, {"type": "null"}]},
 606         "nstId": string_schema,
 607         "vimAccountId": id_schema,
 608         "ssh_keys": {"type": "string"},
 609         "nsi_id": id_schema,
 610         "netslice-subnet": {
 611             "type": "array",
 612             "minItems": 1,
 613             "items": nsi_slice_instantiate
 614         },
 615         "netslice-vld": {
 616             "type": "array",
 617             "minItems": 1,
 618             "items": nsi_vld_instantiate
 619         },
 620     },
 621     "required": ["nsiName", "nstId", "vimAccountId"],
 622     "additionalProperties": False
 623 }
 624
 625 nsi_action = {
 626
 627 }
 628
 629 nsi_terminate = {
 630
 631 }
 632
 633
 634 class ValidationError(Exception):
 635     def __init__(self, message, http_code=HTTPStatus.UNPROCESSABLE_ENTITY):
 636         self.http_code = http_code
 637         Exception.__init__(self, message)
 638
 639
 640 def validate_input(indata, schema_to_use):
 641     """
 642     Validates input data against json schema
 643     :param indata: user input data. Should be a dictionary
 644     :param schema_to_use: jsonschema to test
 645     :return: None if ok, raises ValidationError exception on error
 646     """
 647     try:
 648         if schema_to_use:
 649             js_v(indata, schema_to_use)
 650         return None
 651     except js_e.ValidationError as e:
 652         if e.path:
 653             error_pos = "at '" + ":".join(map(str, e.path)) + "'"
 654         else:
 655             error_pos = ""
 656         raise ValidationError("Format error {} '{}' ".format(error_pos, e.message))
 657     except js_e.SchemaError:
 658         raise ValidationError("Bad json schema {}".format(schema_to_use), http_code=HTTPStatus.INTERNAL_SERVER_ERROR)