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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 var Event = require('event_bindings').Event; | |
| 6 var forEach = require('utils').forEach; | |
| 7 var GetAvailability = requireNative('v8_context').GetAvailability; | |
| 8 var logActivity = requireNative('activityLogger'); | |
| 9 var logging = requireNative('logging'); | |
| 10 var process = requireNative('process'); | |
| 11 var schemaRegistry = requireNative('schema_registry'); | |
| 12 var schemaUtils = require('schemaUtils'); | |
| 13 var utils = require('utils'); | |
| 14 var sendRequestHandler = require('sendRequest'); | |
| 15 | |
| 16 var contextType = process.GetContextType(); | |
| 17 var extensionId = process.GetExtensionId(); | |
| 18 var manifestVersion = process.GetManifestVersion(); | |
| 19 var sendRequest = sendRequestHandler.sendRequest; | |
| 20 | |
| 21 // Stores the name and definition of each API function, with methods to | |
| 22 // modify their behaviour (such as a custom way to handle requests to the | |
| 23 // API, a custom callback, etc). | |
| 24 function APIFunctions(namespace) { | |
| 25 this.apiFunctions_ = {}; | |
| 26 this.unavailableApiFunctions_ = {}; | |
| 27 this.namespace = namespace; | |
| 28 } | |
| 29 | |
| 30 APIFunctions.prototype.register = function(apiName, apiFunction) { | |
| 31 this.apiFunctions_[apiName] = apiFunction; | |
| 32 }; | |
| 33 | |
| 34 // Registers a function as existing but not available, meaning that calls to | |
| 35 // the set* methods that reference this function should be ignored rather | |
| 36 // than throwing Errors. | |
| 37 APIFunctions.prototype.registerUnavailable = function(apiName) { | |
| 38 this.unavailableApiFunctions_[apiName] = apiName; | |
| 39 }; | |
| 40 | |
| 41 APIFunctions.prototype.setHook_ = | |
| 42 function(apiName, propertyName, customizedFunction) { | |
| 43 if ($Object.hasOwnProperty(this.unavailableApiFunctions_, apiName)) | |
| 44 return; | |
| 45 if (!$Object.hasOwnProperty(this.apiFunctions_, apiName)) | |
| 46 throw new Error('Tried to set hook for unknown API "' + apiName + '"'); | |
| 47 this.apiFunctions_[apiName][propertyName] = customizedFunction; | |
| 48 }; | |
| 49 | |
| 50 APIFunctions.prototype.setHandleRequest = | |
| 51 function(apiName, customizedFunction) { | |
| 52 var prefix = this.namespace; | |
| 53 return this.setHook_(apiName, 'handleRequest', | |
| 54 function() { | |
| 55 var ret = $Function.apply(customizedFunction, this, arguments); | |
| 56 // Logs API calls to the Activity Log if it doesn't go through an | |
| 57 // ExtensionFunction. | |
| 58 if (!sendRequestHandler.getCalledSendRequest()) | |
| 59 logActivity.LogAPICall(extensionId, prefix + "." + apiName, | |
| 60 $Array.slice(arguments)); | |
| 61 return ret; | |
| 62 }); | |
| 63 }; | |
| 64 | |
| 65 APIFunctions.prototype.setUpdateArgumentsPostValidate = | |
| 66 function(apiName, customizedFunction) { | |
| 67 return this.setHook_( | |
| 68 apiName, 'updateArgumentsPostValidate', customizedFunction); | |
| 69 }; | |
| 70 | |
| 71 APIFunctions.prototype.setUpdateArgumentsPreValidate = | |
| 72 function(apiName, customizedFunction) { | |
| 73 return this.setHook_( | |
| 74 apiName, 'updateArgumentsPreValidate', customizedFunction); | |
| 75 }; | |
| 76 | |
| 77 APIFunctions.prototype.setCustomCallback = | |
| 78 function(apiName, customizedFunction) { | |
| 79 return this.setHook_(apiName, 'customCallback', customizedFunction); | |
| 80 }; | |
| 81 | |
| 82 function CustomBindingsObject() { | |
| 83 } | |
| 84 | |
| 85 CustomBindingsObject.prototype.setSchema = function(schema) { | |
| 86 // The functions in the schema are in list form, so we move them into a | |
| 87 // dictionary for easier access. | |
| 88 var self = this; | |
| 89 self.functionSchemas = {}; | |
| 90 $Array.forEach(schema.functions, function(f) { | |
| 91 self.functionSchemas[f.name] = { | |
| 92 name: f.name, | |
| 93 definition: f | |
| 94 } | |
| 95 }); | |
| 96 }; | |
| 97 | |
| 98 // Get the platform from navigator.appVersion. | |
| 99 function getPlatform() { | |
| 100 var platforms = [ | |
| 101 [/CrOS Touch/, "chromeos touch"], | |
| 102 [/CrOS/, "chromeos"], | |
| 103 [/Linux/, "linux"], | |
| 104 [/Mac/, "mac"], | |
| 105 [/Win/, "win"], | |
| 106 ]; | |
| 107 | |
| 108 for (var i = 0; i < platforms.length; i++) { | |
| 109 if ($RegExp.test(platforms[i][0], navigator.appVersion)) { | |
| 110 return platforms[i][1]; | |
| 111 } | |
| 112 } | |
| 113 return "unknown"; | |
| 114 } | |
| 115 | |
| 116 function isPlatformSupported(schemaNode, platform) { | |
| 117 return !schemaNode.platforms || | |
| 118 schemaNode.platforms.indexOf(platform) > -1; | |
| 119 } | |
| 120 | |
| 121 function isManifestVersionSupported(schemaNode, manifestVersion) { | |
| 122 return !schemaNode.maximumManifestVersion || | |
| 123 manifestVersion <= schemaNode.maximumManifestVersion; | |
| 124 } | |
| 125 | |
| 126 function isSchemaNodeSupported(schemaNode, platform, manifestVersion) { | |
| 127 return isPlatformSupported(schemaNode, platform) && | |
| 128 isManifestVersionSupported(schemaNode, manifestVersion); | |
| 129 } | |
| 130 | |
| 131 function createCustomType(type) { | |
| 132 var jsModuleName = type.js_module; | |
| 133 logging.CHECK(jsModuleName, 'Custom type ' + type.id + | |
| 134 ' has no "js_module" property.'); | |
| 135 var jsModule = require(jsModuleName); | |
| 136 logging.CHECK(jsModule, 'No module ' + jsModuleName + ' found for ' + | |
| 137 type.id + '.'); | |
| 138 var customType = jsModule[jsModuleName]; | |
| 139 logging.CHECK(customType, jsModuleName + ' must export itself.'); | |
| 140 customType.prototype = new CustomBindingsObject(); | |
| 141 customType.prototype.setSchema(type); | |
| 142 return customType; | |
| 143 } | |
| 144 | |
| 145 var platform = getPlatform(); | |
| 146 | |
| 147 function Binding(schema) { | |
| 148 this.schema_ = schema; | |
| 149 this.apiFunctions_ = new APIFunctions(schema.namespace); | |
| 150 this.customEvent_ = null; | |
| 151 this.customHooks_ = []; | |
| 152 }; | |
| 153 | |
| 154 Binding.create = function(apiName) { | |
| 155 return new Binding(schemaRegistry.GetSchema(apiName)); | |
| 156 }; | |
| 157 | |
| 158 Binding.prototype = { | |
| 159 // The API through which the ${api_name}_custom_bindings.js files customize | |
| 160 // their API bindings beyond what can be generated. | |
| 161 // | |
| 162 // There are 2 types of customizations available: those which are required in | |
| 163 // order to do the schema generation (registerCustomEvent and | |
| 164 // registerCustomType), and those which can only run after the bindings have | |
| 165 // been generated (registerCustomHook). | |
| 166 | |
| 167 // Registers a custom event type for the API identified by |namespace|. | |
| 168 // |event| is the event's constructor. | |
| 169 registerCustomEvent: function(event) { | |
| 170 this.customEvent_ = event; | |
| 171 }, | |
| 172 | |
| 173 // Registers a function |hook| to run after the schema for all APIs has been | |
| 174 // generated. The hook is passed as its first argument an "API" object to | |
| 175 // interact with, and second the current extension ID. See where | |
| 176 // |customHooks| is used. | |
| 177 registerCustomHook: function(fn) { | |
| 178 $Array.push(this.customHooks_, fn); | |
| 179 }, | |
| 180 | |
| 181 // TODO(kalman/cduvall): Refactor this so |runHooks_| is not needed. | |
| 182 runHooks_: function(api) { | |
| 183 $Array.forEach(this.customHooks_, function(hook) { | |
| 184 if (!isSchemaNodeSupported(this.schema_, platform, manifestVersion)) | |
| 185 return; | |
| 186 | |
| 187 if (!hook) | |
| 188 return; | |
| 189 | |
| 190 hook({ | |
| 191 apiFunctions: this.apiFunctions_, | |
| 192 schema: this.schema_, | |
| 193 compiledApi: api | |
| 194 }, extensionId, contextType); | |
| 195 }, this); | |
| 196 }, | |
| 197 | |
| 198 // Generates the bindings from |this.schema_| and integrates any custom | |
| 199 // bindings that might be present. | |
| 200 generate: function() { | |
| 201 var schema = this.schema_; | |
| 202 | |
| 203 function shouldCheckUnprivileged() { | |
| 204 var shouldCheck = 'unprivileged' in schema; | |
| 205 if (shouldCheck) | |
| 206 return shouldCheck; | |
| 207 | |
| 208 $Array.forEach(['functions', 'events'], function(type) { | |
| 209 if ($Object.hasOwnProperty(schema, type)) { | |
| 210 $Array.forEach(schema[type], function(node) { | |
| 211 if ('unprivileged' in node) | |
| 212 shouldCheck = true; | |
| 213 }); | |
| 214 } | |
| 215 }); | |
| 216 if (shouldCheck) | |
| 217 return shouldCheck; | |
| 218 | |
| 219 for (var property in schema.properties) { | |
| 220 if ($Object.hasOwnProperty(schema, property) && | |
| 221 'unprivileged' in schema.properties[property]) { | |
| 222 shouldCheck = true; | |
| 223 break; | |
| 224 } | |
| 225 } | |
| 226 return shouldCheck; | |
| 227 } | |
| 228 var checkUnprivileged = shouldCheckUnprivileged(); | |
| 229 | |
| 230 // TODO(kalman/cduvall): Make GetAvailability handle this, then delete the | |
| 231 // supporting code. | |
| 232 if (!isSchemaNodeSupported(schema, platform, manifestVersion)) { | |
| 233 console.error('chrome.' + schema.namespace + ' is not supported on ' + | |
| 234 'this platform or manifest version'); | |
| 235 return undefined; | |
| 236 } | |
| 237 | |
| 238 var mod = {}; | |
| 239 | |
| 240 var namespaces = $String.split(schema.namespace, '.'); | |
| 241 for (var index = 0, name; name = namespaces[index]; index++) { | |
| 242 mod[name] = mod[name] || {}; | |
| 243 mod = mod[name]; | |
| 244 } | |
| 245 | |
| 246 // Add types to global schemaValidator, the types we depend on from other | |
| 247 // namespaces will be added as needed. | |
| 248 if (schema.types) { | |
| 249 $Array.forEach(schema.types, function(t) { | |
| 250 if (!isSchemaNodeSupported(t, platform, manifestVersion)) | |
| 251 return; | |
| 252 schemaUtils.schemaValidator.addTypes(t); | |
| 253 }, this); | |
| 254 } | |
| 255 | |
| 256 // TODO(cduvall): Take out when all APIs have been converted to features. | |
| 257 // Returns whether access to the content of a schema should be denied, | |
| 258 // based on the presence of "unprivileged" and whether this is an | |
| 259 // extension process (versus e.g. a content script). | |
| 260 function isSchemaAccessAllowed(itemSchema) { | |
| 261 return (contextType == 'BLESSED_EXTENSION') || | |
| 262 schema.unprivileged || | |
| 263 itemSchema.unprivileged; | |
| 264 }; | |
| 265 | |
| 266 // Setup Functions. | |
| 267 if (schema.functions) { | |
| 268 $Array.forEach(schema.functions, function(functionDef) { | |
| 269 if (functionDef.name in mod) { | |
| 270 throw new Error('Function ' + functionDef.name + | |
| 271 ' already defined in ' + schema.namespace); | |
| 272 } | |
| 273 | |
| 274 if (!isSchemaNodeSupported(functionDef, platform, manifestVersion)) { | |
| 275 this.apiFunctions_.registerUnavailable(functionDef.name); | |
| 276 return; | |
| 277 } | |
| 278 | |
| 279 var apiFunction = {}; | |
| 280 apiFunction.definition = functionDef; | |
| 281 apiFunction.name = schema.namespace + '.' + functionDef.name; | |
| 282 | |
| 283 if (!GetAvailability(apiFunction.name).is_available || | |
| 284 (checkUnprivileged && !isSchemaAccessAllowed(functionDef))) { | |
| 285 this.apiFunctions_.registerUnavailable(functionDef.name); | |
| 286 return; | |
| 287 } | |
| 288 | |
| 289 // TODO(aa): It would be best to run this in a unit test, but in order | |
| 290 // to do that we would need to better factor this code so that it | |
| 291 // doesn't depend on so much v8::Extension machinery. | |
| 292 if (logging.DCHECK_IS_ON() && | |
| 293 schemaUtils.isFunctionSignatureAmbiguous(apiFunction.definition)) { | |
| 294 throw new Error( | |
| 295 apiFunction.name + ' has ambiguous optional arguments. ' + | |
| 296 'To implement custom disambiguation logic, add ' + | |
| 297 '"allowAmbiguousOptionalArguments" to the function\'s schema.'); | |
| 298 } | |
| 299 | |
| 300 this.apiFunctions_.register(functionDef.name, apiFunction); | |
| 301 | |
| 302 mod[functionDef.name] = $Function.bind(function() { | |
| 303 var args = $Array.slice(arguments); | |
| 304 if (this.updateArgumentsPreValidate) | |
| 305 args = $Function.apply(this.updateArgumentsPreValidate, this, args); | |
| 306 | |
| 307 args = schemaUtils.normalizeArgumentsAndValidate(args, this); | |
| 308 if (this.updateArgumentsPostValidate) { | |
| 309 args = $Function.apply(this.updateArgumentsPostValidate, | |
| 310 this, | |
| 311 args); | |
| 312 } | |
| 313 | |
| 314 sendRequestHandler.clearCalledSendRequest(); | |
| 315 | |
| 316 var retval; | |
| 317 if (this.handleRequest) { | |
| 318 retval = $Function.apply(this.handleRequest, this, args); | |
| 319 } else { | |
| 320 var optArgs = { | |
| 321 customCallback: this.customCallback | |
| 322 }; | |
| 323 retval = sendRequest(this.name, args, | |
| 324 this.definition.parameters, | |
| 325 optArgs); | |
| 326 } | |
| 327 sendRequestHandler.clearCalledSendRequest(); | |
| 328 | |
| 329 // Validate return value if in sanity check mode. | |
| 330 if (logging.DCHECK_IS_ON() && this.definition.returns) | |
| 331 schemaUtils.validate([retval], [this.definition.returns]); | |
| 332 return retval; | |
| 333 }, apiFunction); | |
| 334 }, this); | |
| 335 } | |
| 336 | |
| 337 // Setup Events | |
| 338 if (schema.events) { | |
| 339 $Array.forEach(schema.events, function(eventDef) { | |
| 340 if (eventDef.name in mod) { | |
| 341 throw new Error('Event ' + eventDef.name + | |
| 342 ' already defined in ' + schema.namespace); | |
| 343 } | |
| 344 if (!isSchemaNodeSupported(eventDef, platform, manifestVersion)) | |
| 345 return; | |
| 346 | |
| 347 var eventName = schema.namespace + "." + eventDef.name; | |
| 348 if (!GetAvailability(eventName).is_available || | |
| 349 (checkUnprivileged && !isSchemaAccessAllowed(eventDef))) { | |
| 350 return; | |
| 351 } | |
| 352 | |
| 353 var options = eventDef.options || {}; | |
| 354 if (eventDef.filters && eventDef.filters.length > 0) | |
| 355 options.supportsFilters = true; | |
| 356 | |
| 357 var parameters = eventDef.parameters; | |
| 358 if (this.customEvent_) { | |
| 359 mod[eventDef.name] = new this.customEvent_( | |
| 360 eventName, parameters, eventDef.extraParameters, options); | |
| 361 } else { | |
| 362 mod[eventDef.name] = new Event(eventName, parameters, options); | |
| 363 } | |
| 364 }, this); | |
| 365 } | |
| 366 | |
| 367 function addProperties(m, parentDef) { | |
| 368 var properties = parentDef.properties; | |
| 369 if (!properties) | |
| 370 return; | |
| 371 | |
| 372 forEach(properties, function(propertyName, propertyDef) { | |
| 373 if (propertyName in m) | |
| 374 return; // TODO(kalman): be strict like functions/events somehow. | |
| 375 if (!isSchemaNodeSupported(propertyDef, platform, manifestVersion)) | |
| 376 return; | |
| 377 if (!GetAvailability(schema.namespace + "." + | |
| 378 propertyName).is_available || | |
| 379 (checkUnprivileged && !isSchemaAccessAllowed(propertyDef))) { | |
| 380 return; | |
| 381 } | |
| 382 | |
| 383 var value = propertyDef.value; | |
| 384 if (value) { | |
| 385 // Values may just have raw types as defined in the JSON, such | |
| 386 // as "WINDOW_ID_NONE": { "value": -1 }. We handle this here. | |
| 387 // TODO(kalman): enforce that things with a "value" property can't | |
| 388 // define their own types. | |
| 389 var type = propertyDef.type || typeof(value); | |
| 390 if (type === 'integer' || type === 'number') { | |
| 391 value = parseInt(value); | |
| 392 } else if (type === 'boolean') { | |
| 393 value = value === 'true'; | |
| 394 } else if (propertyDef['$ref']) { | |
| 395 var ref = propertyDef['$ref']; | |
| 396 var type = utils.loadTypeSchema(propertyDef['$ref'], schema); | |
| 397 logging.CHECK(type, 'Schema for $ref type ' + ref + ' not found'); | |
| 398 var constructor = createCustomType(type); | |
| 399 var args = value; | |
| 400 // For an object propertyDef, |value| is an array of constructor | |
| 401 // arguments, but we want to pass the arguments directly (i.e. | |
| 402 // not as an array), so we have to fake calling |new| on the | |
| 403 // constructor. | |
| 404 value = { __proto__: constructor.prototype }; | |
| 405 $Function.apply(constructor, value, args); | |
| 406 // Recursively add properties. | |
| 407 addProperties(value, propertyDef); | |
| 408 } else if (type === 'object') { | |
| 409 // Recursively add properties. | |
| 410 addProperties(value, propertyDef); | |
| 411 } else if (type !== 'string') { | |
| 412 throw new Error('NOT IMPLEMENTED (extension_api.json error): ' + | |
| 413 'Cannot parse values for type "' + type + '"'); | |
| 414 } | |
| 415 m[propertyName] = value; | |
| 416 } | |
| 417 }); | |
| 418 }; | |
| 419 | |
| 420 addProperties(mod, schema); | |
| 421 | |
| 422 var availability = GetAvailability(schema.namespace); | |
| 423 if (!availability.is_available && $Object.keys(mod).length == 0) { | |
| 424 console.error('chrome.' + schema.namespace + ' is not available: ' + | |
| 425 availability.message); | |
| 426 return; | |
| 427 } | |
| 428 | |
| 429 this.runHooks_(mod); | |
| 430 return mod; | |
| 431 } | |
| 432 }; | |
| 433 | |
| 434 exports.Binding = Binding; | |
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Chromium Code Reviews
Issue 309413002:
Revert 274558 "Move some extensions renderer resources to extens..." (Closed)
Base URL: svn://svn.chromium.org/chrome/