services/api/app/controllers/arvados/v1/schema_controller.rb

   1 class Arvados::V1::SchemaController < ApplicationController
   2   skip_before_filter :find_objects_for_index
   3   skip_before_filter :find_object_by_uuid
   4   skip_before_filter :render_404_if_no_object
   5   skip_before_filter :require_auth_scope
   6
   7   def index
   8     expires_in 24.hours, public: true
   9     discovery = Rails.cache.fetch 'arvados_v1_rest_discovery' do
  10       Rails.application.eager_load!
  11       discovery = {
  12         kind: "discovery#restDescription",
  13         discoveryVersion: "v1",
  14         id: "arvados:v1",
  15         name: "arvados",
  16         version: "v1",
  17         revision: "20131114",
  18         source_version: (Rails.application.config.source_version ? Rails.application.config.source_version : "No version information available") + (Rails.application.config.local_modified ? Rails.application.config.local_modified.to_s : ''),
  19         generatedAt: Time.now.iso8601,
  20         title: "Arvados API",
  21         description: "The API to interact with Arvados.",
  22         documentationLink: "http://doc.arvados.org/api/index.html",
  23         protocol: "rest",
  24         baseUrl: root_url + "arvados/v1/",
  25         basePath: "/arvados/v1/",
  26         rootUrl: root_url,
  27         servicePath: "arvados/v1/",
  28         batchPath: "batch",
  29         parameters: {
  30           alt: {
  31             type: "string",
  32             description: "Data format for the response.",
  33             default: "json",
  34             enum: [
  35                    "json"
  36                   ],
  37             enumDescriptions: [
  38                                "Responses with Content-Type of application/json"
  39                               ],
  40             location: "query"
  41           },
  42           fields: {
  43             type: "string",
  44             description: "Selector specifying which fields to include in a partial response.",
  45             location: "query"
  46           },
  47           key: {
  48             type: "string",
  49             description: "API key. Your API key identifies your project and provides you with API access, quota, and reports. Required unless you provide an OAuth 2.0 token.",
  50             location: "query"
  51           },
  52           oauth_token: {
  53             type: "string",
  54             description: "OAuth 2.0 token for the current user.",
  55             location: "query"
  56           }
  57         },
  58         auth: {
  59           oauth2: {
  60             scopes: {
  61               "https://api.curoverse.com/auth/arvados" => {
  62                 description: "View and manage objects"
  63               },
  64               "https://api.curoverse.com/auth/arvados.readonly" => {
  65                 description: "View objects"
  66               }
  67             }
  68           }
  69         },
  70         schemas: {},
  71         resources: {}
  72       }
  73
  74       if Rails.application.config.websocket_address
  75         discovery[:websocketUrl] = Rails.application.config.websocket_address
  76       elsif ENV['ARVADOS_WEBSOCKETS']
  77         discovery[:websocketUrl] = (root_url.sub /^http/, 'ws') + "websocket"
  78       end
  79
  80       ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
  81         begin
  82           ctl_class = "Arvados::V1::#{k.to_s.pluralize}Controller".constantize
  83         rescue
  84           # No controller -> no discovery.
  85           next
  86         end
  87         object_properties = {}
  88         k.columns.
  89           select { |col| col.name != 'id' }.
  90           collect do |col|
  91           if k.serialized_attributes.has_key? col.name
  92             object_properties[col.name] = {
  93               type: k.serialized_attributes[col.name].object_class.to_s
  94             }
  95           else
  96             object_properties[col.name] = {
  97               type: col.type
  98             }
  99           end
 100         end
 101         discovery[:schemas][k.to_s + 'List'] = {
 102           id: k.to_s + 'List',
 103           description: k.to_s + ' list',
 104           type: "object",
 105           properties: {
 106             kind: {
 107               type: "string",
 108               description: "Object type. Always arvados##{k.to_s.camelcase(:lower)}List.",
 109               default: "arvados##{k.to_s.camelcase(:lower)}List"
 110             },
 111             etag: {
 112               type: "string",
 113               description: "List version."
 114             },
 115             items: {
 116               type: "array",
 117               description: "The list of #{k.to_s.pluralize}.",
 118               items: {
 119                 "$ref" => k.to_s
 120               }
 121             },
 122             next_link: {
 123               type: "string",
 124               description: "A link to the next page of #{k.to_s.pluralize}."
 125             },
 126             next_page_token: {
 127               type: "string",
 128               description: "The page token for the next page of #{k.to_s.pluralize}."
 129             },
 130             selfLink: {
 131               type: "string",
 132               description: "A link back to this list."
 133             }
 134           }
 135         }
 136         discovery[:schemas][k.to_s] = {
 137           id: k.to_s,
 138           description: k.to_s,
 139           type: "object",
 140           uuidPrefix: (k.respond_to?(:uuid_prefix) ? k.uuid_prefix : nil),
 141           properties: {
 142             uuid: {
 143               type: "string",
 144               description: "Object ID."
 145             },
 146             etag: {
 147               type: "string",
 148               description: "Object version."
 149             }
 150           }.merge(object_properties)
 151         }
 152         discovery[:resources][k.to_s.underscore.pluralize] = {
 153           methods: {
 154             get: {
 155               id: "arvados.#{k.to_s.underscore.pluralize}.get",
 156               path: "#{k.to_s.underscore.pluralize}/{uuid}",
 157               httpMethod: "GET",
 158               description: "Gets a #{k.to_s}'s metadata by UUID.",
 159               parameters: {
 160                 uuid: {
 161                   type: "string",
 162                   description: "The UUID of the #{k.to_s} in question.",
 163                   required: true,
 164                   location: "path"
 165                 }
 166               },
 167               parameterOrder: [
 168                                "uuid"
 169                               ],
 170               response: {
 171                 "$ref" => k.to_s
 172               },
 173               scopes: [
 174                        "https://api.curoverse.com/auth/arvados",
 175                        "https://api.curoverse.com/auth/arvados.readonly"
 176                       ]
 177             },
 178             list: {
 179               id: "arvados.#{k.to_s.underscore.pluralize}.list",
 180               path: k.to_s.underscore.pluralize,
 181               httpMethod: "GET",
 182               description:
 183                  %|List #{k.to_s.pluralize}.
 184
 185                    The <code>list</code> method returns a
 186                    <a href="/api/resources.html">resource list</a> of
 187                    matching #{k.to_s.pluralize}. For example:
 188
 189                    <pre>
 190                    {
 191                     "kind":"arvados##{k.to_s.camelcase(:lower)}List",
 192                     "etag":"",
 193                     "self_link":"",
 194                     "next_page_token":"",
 195                     "next_link":"",
 196                     "items":[
 197                        ...
 198                     ],
 199                     "items_available":745,
 200                     "_profile":{
 201                      "request_time":0.157236317
 202                     }
 203                     </pre>|,
 204               parameters: {
 205                 limit: {
 206                   type: "integer",
 207                   description: "Maximum number of #{k.to_s.underscore.pluralize} to return.",
 208                   default: "100",
 209                   format: "int32",
 210                   minimum: "0",
 211                   location: "query",
 212                 },
 213                 offset: {
 214                   type: "integer",
 215                   description: "Number of #{k.to_s.underscore.pluralize} to skip before first returned record.",
 216                   default: "0",
 217                   format: "int32",
 218                   minimum: "0",
 219                   location: "query",
 220                   },
 221                 filters: {
 222                   type: "array",
 223                   description: "Conditions for filtering #{k.to_s.underscore.pluralize}.",
 224                   location: "query"
 225                 },
 226                 where: {
 227                   type: "object",
 228                   description: "Conditions for filtering #{k.to_s.underscore.pluralize}. (Deprecated. Use filters instead.)",
 229                   location: "query"
 230                 },
 231                 order: {
 232                   type: "string",
 233                   description: "Order in which to return matching #{k.to_s.underscore.pluralize}.",
 234                   location: "query"
 235                 },
 236                 select: {
 237                   type: "array",
 238                   description: "Select which fields to return",
 239                   location: "query"
 240                 },
 241                 distinct: {
 242                   type: "boolean",
 243                   description: "Return each distinct object",
 244                   location: "query"
 245                 }
 246               },
 247               response: {
 248                 "$ref" => "#{k.to_s}List"
 249               },
 250               scopes: [
 251                        "https://api.curoverse.com/auth/arvados",
 252                        "https://api.curoverse.com/auth/arvados.readonly"
 253                       ]
 254             },
 255             create: {
 256               id: "arvados.#{k.to_s.underscore.pluralize}.create",
 257               path: "#{k.to_s.underscore.pluralize}",
 258               httpMethod: "POST",
 259               description: "Create a new #{k.to_s}.",
 260               parameters: {},
 261               request: {
 262                 required: true,
 263                 properties: {
 264                   k.to_s.underscore => {
 265                     "$ref" => k.to_s
 266                   }
 267                 }
 268               },
 269               response: {
 270                 "$ref" => k.to_s
 271               },
 272               scopes: [
 273                        "https://api.curoverse.com/auth/arvados"
 274                       ]
 275             },
 276             update: {
 277               id: "arvados.#{k.to_s.underscore.pluralize}.update",
 278               path: "#{k.to_s.underscore.pluralize}/{uuid}",
 279               httpMethod: "PUT",
 280               description: "Update attributes of an existing #{k.to_s}.",
 281               parameters: {
 282                 uuid: {
 283                   type: "string",
 284                   description: "The UUID of the #{k.to_s} in question.",
 285                   required: true,
 286                   location: "path"
 287                 }
 288               },
 289               request: {
 290                 required: true,
 291                 properties: {
 292                   k.to_s.underscore => {
 293                     "$ref" => k.to_s
 294                   }
 295                 }
 296               },
 297               response: {
 298                 "$ref" => k.to_s
 299               },
 300               scopes: [
 301                        "https://api.curoverse.com/auth/arvados"
 302                       ]
 303             },
 304             delete: {
 305               id: "arvados.#{k.to_s.underscore.pluralize}.delete",
 306               path: "#{k.to_s.underscore.pluralize}/{uuid}",
 307               httpMethod: "DELETE",
 308               description: "Delete an existing #{k.to_s}.",
 309               parameters: {
 310                 uuid: {
 311                   type: "string",
 312                   description: "The UUID of the #{k.to_s} in question.",
 313                   required: true,
 314                   location: "path"
 315                 }
 316               },
 317               response: {
 318                 "$ref" => k.to_s
 319               },
 320               scopes: [
 321                        "https://api.curoverse.com/auth/arvados"
 322                       ]
 323             }
 324           }
 325         }
 326         # Check for Rails routes that don't match the usual actions
 327         # listed above
 328         d_methods = discovery[:resources][k.to_s.underscore.pluralize][:methods]
 329         Rails.application.routes.routes.each do |route|
 330           action = route.defaults[:action]
 331           httpMethod = ['GET', 'POST', 'PUT', 'DELETE'].map { |method|
 332             method if route.verb.match(method)
 333           }.compact.first
 334           if httpMethod and
 335               route.defaults[:controller] == 'arvados/v1/' + k.to_s.underscore.pluralize and
 336               ctl_class.action_methods.include? action
 337             if !d_methods[action.to_sym]
 338               method = {
 339                 id: "arvados.#{k.to_s.underscore.pluralize}.#{action}",
 340                 path: route.path.spec.to_s.sub('/arvados/v1/','').sub('(.:format)','').sub(/:(uu)?id/,'{uuid}'),
 341                 httpMethod: httpMethod,
 342                 description: "#{action} #{k.to_s.underscore.pluralize}",
 343                 parameters: {},
 344                 response: {
 345                   "$ref" => (action == 'index' ? "#{k.to_s}List" : k.to_s)
 346                 },
 347                 scopes: [
 348                          "https://api.curoverse.com/auth/arvados"
 349                         ]
 350               }
 351               route.segment_keys.each do |key|
 352                 if key != :format
 353                   key = :uuid if key == :id
 354                   method[:parameters][key] = {
 355                     type: "string",
 356                     description: "",
 357                     required: true,
 358                     location: "path"
 359                   }
 360                 end
 361               end
 362             else
 363               # We already built a generic method description, but we
 364               # might find some more required parameters through
 365               # introspection.
 366               method = d_methods[action.to_sym]
 367             end
 368             if ctl_class.respond_to? "_#{action}_requires_parameters".to_sym
 369               ctl_class.send("_#{action}_requires_parameters".to_sym).each do |k, v|
 370                 if v.is_a? Hash
 371                   method[:parameters][k] = v
 372                 else
 373                   method[:parameters][k] = {}
 374                 end
 375                 if !method[:parameters][k][:default].nil?
 376                   # The JAVA SDK is sensitive to all values being strings
 377                   method[:parameters][k][:default] = method[:parameters][k][:default].to_s
 378                 end
 379                 method[:parameters][k][:type] ||= 'string'
 380                 method[:parameters][k][:description] ||= ''
 381                 method[:parameters][k][:location] = (route.segment_keys.include?(k) ? 'path' : 'query')
 382                 if method[:parameters][k][:required].nil?
 383                   method[:parameters][k][:required] = v != false
 384                 end
 385               end
 386             end
 387             d_methods[action.to_sym] = method
 388           end
 389         end
 390       end
 391       discovery
 392     end
 393     render json: discovery
 394   end
 395 end