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rest-helper-factory.js
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rest-helper-factory.js
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'use strict'
let Joi = require('@hapi/joi')
Joi.objectId = require('joi-objectid')(Joi)
let _ = require('lodash')
let assert = require('assert')
let joiMongooseHelper = require('./joi-mongoose-helper')
let validationHelper = require('./validation-helper')
let authHelper = require('./auth-helper')
let chalk = require('chalk')
let config = require('../config')
let restHapiPolicies = require('./policy-generator')
// TODO: remove "options"?
// TODO: change model "alias" to "routeAlias" (or remove the option)
module.exports = function(logger, mongoose, server) {
let HandlerHelper = require('./handler-helper-factory')()
let headersValidation
if (config.authStrategy) {
headersValidation = Joi.object({
authorization: Joi.string().required()
}).options({ allowUnknown: true })
} else {
headersValidation = Joi.object().options({ allowUnknown: true })
}
return {
defaultHeadersValidation: headersValidation,
/**
* Generates the restful API endpoints for a single model.
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: options object.
*/
generateRoutes: function(server, model, options) {
// TODO: generate multiple DELETE routes at /RESOURCE and at
// TODO: /RESOURCE/{ownerId}/ASSOCIATION that take a list of Id's as a payload
try {
validationHelper.validateModel(model, logger)
let collectionName = model.collectionDisplayName || model.modelName
let Log = logger.bind(chalk.blue(collectionName))
options = options || {}
if (model.routeOptions.allowRead !== false) {
this.generateListEndpoint(server, model, options, Log)
this.generateFindEndpoint(server, model, options, Log)
}
if (model.routeOptions.allowCreate !== false) {
this.generateCreateEndpoint(server, model, options, Log)
}
if (model.routeOptions.allowUpdate !== false) {
this.generateUpdateEndpoint(server, model, options, Log)
}
if (model.routeOptions.allowDelete !== false) {
this.generateDeleteOneEndpoint(server, model, options, Log)
this.generateDeleteManyEndpoint(server, model, options, Log)
}
if (model.routeOptions.associations) {
for (let associationName in model.routeOptions.associations) {
let association = model.routeOptions.associations[associationName]
if (
association.type === 'MANY_MANY' ||
association.type === 'ONE_MANY' ||
association.type === '_MANY'
) {
if (association.allowAdd !== false) {
this.generateAssociationAddOneEndpoint(
server,
model,
association,
options,
Log
)
this.generateAssociationAddManyEndpoint(
server,
model,
association,
options,
Log
)
}
if (association.allowRemove !== false) {
this.generateAssociationRemoveOneEndpoint(
server,
model,
association,
options,
Log
)
this.generateAssociationRemoveManyEndpoint(
server,
model,
association,
options,
Log
)
}
if (association.allowRead !== false) {
this.generateAssociationGetAllEndpoint(
server,
model,
association,
options,
Log
)
}
}
}
}
if (model.routeOptions && model.routeOptions.extraEndpoints) {
for (let extraEndpointIndex in model.routeOptions.extraEndpoints) {
let extraEndpointFunction =
model.routeOptions.extraEndpoints[extraEndpointIndex]
extraEndpointFunction(server, model, options, Log)
}
}
} catch (error) {
logger.error('Error:', error)
throw error
}
},
/**
* Creates an endpoint for GET /RESOURCE.
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
generateListEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('List'))
let collectionName = model.collectionDisplayName || model.modelName
options = options || {}
if (config.logRoutes) {
Log.note('Generating List endpoint for ' + collectionName)
}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateListHandler(model, options, Log)
let queryModel = joiMongooseHelper.generateJoiListQueryModel(model, Log)
let readModel = joiMongooseHelper.generateJoiReadModel(model, Log)
if (!config.enableResponseValidation) {
let label = readModel._flags.label
readModel = Joi.alternatives()
.try(readModel, Joi.any())
.label(label)
}
let auth = false
let listHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.readAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'read', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug('Scope for GET/' + resourceAliasForRoute + ':', scope)
}
}
} else {
listHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.readPolicies || []
)
}
if (config.enableDocumentScopes && auth) {
policies.push(restHapiPolicies.enforceDocumentScopePre(model, Log))
policies.push(restHapiPolicies.enforceDocumentScopePost(model, Log))
}
server.route({
method: 'GET',
path: '/' + resourceAliasForRoute,
config: {
handler: handler,
auth: auth,
description: 'Get a list of ' + collectionName + 's',
tags: ['api', collectionName],
cors: config.cors,
validate: {
query: queryModel,
headers: listHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 200,
message: 'The resource(s) was/were found successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{ code: 500, message: 'There was an unknown error.' },
{
code: 503,
message: 'There was a problem with the database.'
}
]
},
policies: policies
},
response: {
failAction: config.enableResponseFail ? 'error' : 'log',
schema: Joi.alternatives()
.try(
Joi.object({
docs: Joi.array()
.items(readModel)
.label(collectionName + 'ArrayModel'),
pages: Joi.any(),
items: Joi.any()
}),
Joi.number()
)
.label(collectionName + 'ListModel')
}
}
})
},
/**
* Creates an endpoint for GET /RESOURCE/{_id}
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
generateFindEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('Find'))
let collectionName = model.collectionDisplayName || model.modelName
if (config.logRoutes) {
Log.note('Generating Find endpoint for ' + collectionName)
}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateFindHandler(model, options, Log)
let queryModel = joiMongooseHelper.generateJoiFindQueryModel(model, Log)
let readModel =
model.readModel || joiMongooseHelper.generateJoiReadModel(model, Log)
if (!config.enableResponseValidation) {
let label = readModel._flags.label
readModel = Joi.alternatives()
.try(readModel, Joi.any())
.label(label)
}
let auth = false
let findHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.readAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'read', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug(
'Scope for GET/' + resourceAliasForRoute + '/{_id}' + ':',
scope
)
}
}
} else {
findHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.readPolicies || []
)
}
if (config.enableDocumentScopes && auth) {
policies.push(restHapiPolicies.enforceDocumentScopePre(model, Log))
policies.push(restHapiPolicies.enforceDocumentScopePost(model, Log))
}
server.route({
method: 'GET',
path: '/' + resourceAliasForRoute + '/{_id}',
config: {
handler: handler,
auth: auth,
description: 'Get a specific ' + collectionName,
tags: ['api', collectionName],
cors: config.cors,
validate: {
query: queryModel,
params: {
_id: Joi.objectId().required()
},
headers: findHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 200,
message: 'The resource(s) was/were found successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{
code: 404,
message: 'There was no resource found with that ID.'
},
{ code: 500, message: 'There was an unknown error.' },
{
code: 503,
message: 'There was a problem with the database.'
}
]
},
policies: policies
},
response: {
failAction: config.enableResponseFail ? 'error' : 'log',
schema: readModel
}
}
})
},
/**
* Creates an endpoint for POST /RESOURCE
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
generateCreateEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('Create'))
let collectionName = model.collectionDisplayName || model.modelName
if (config.logRoutes) {
Log.note('Generating Create endpoint for ' + collectionName)
}
options = options || {}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateCreateHandler(model, options, Log)
let createModel = joiMongooseHelper.generateJoiCreateModel(model, Log)
if (!config.enablePayloadValidation) {
let label = createModel._flags.label
createModel = Joi.alternatives()
.try(createModel, Joi.any())
.label(label)
}
// EXPL: support bulk creates
createModel = Joi.alternatives().try(
Joi.array().items(createModel),
createModel
)
let readModel = joiMongooseHelper.generateJoiReadModel(model, Log)
let label = readModel._flags.label
readModel = Joi.alternatives()
.try(Joi.array().items(readModel), readModel)
.label(label)
if (!config.enableResponseValidation) {
readModel = Joi.alternatives()
.try(readModel, Joi.any())
.label(label)
}
let auth = false
let createHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.createAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'create', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug('Scope for POST/' + resourceAliasForRoute + ':', scope)
}
}
} else {
createHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.createPolicies || []
)
}
if (config.enableDocumentScopes && auth) {
let authorizeDocumentCreator =
model.routeOptions.authorizeDocumentCreator === undefined
? config.authorizeDocumentCreator
: model.routeOptions.authorizeDocumentCreator
let authorizeDocumentCreatorToRead =
model.routeOptions.authorizeDocumentCreatorToRead === undefined
? config.authorizeDocumentCreatorToRead
: model.routeOptions.authorizeDocumentCreatorToRead
let authorizeDocumentCreatorToUpdate =
model.routeOptions.authorizeDocumentCreatorToUpdate === undefined
? config.authorizeDocumentCreatorToUpdate
: model.routeOptions.authorizeDocumentCreatorToUpdate
let authorizeDocumentCreatorToDelete =
model.routeOptions.authorizeDocumentCreatorToDelete === undefined
? config.authorizeDocumentCreatorToDelete
: model.routeOptions.authorizeDocumentCreatorToDelete
let authorizeDocumentCreatorToAssociate =
model.routeOptions.authorizeDocumentCreatorToAssociate === undefined
? config.authorizeDocumentCreatorToAssociate
: model.routeOptions.authorizeDocumentCreatorToAssociate
if (authorizeDocumentCreator) {
policies.push(restHapiPolicies.authorizeDocumentCreator(model, Log))
}
if (authorizeDocumentCreatorToRead) {
policies.push(
restHapiPolicies.authorizeDocumentCreatorToRead(model, Log)
)
}
if (authorizeDocumentCreatorToUpdate) {
policies.push(
restHapiPolicies.authorizeDocumentCreatorToUpdate(model, Log)
)
}
if (authorizeDocumentCreatorToDelete) {
policies.push(
restHapiPolicies.authorizeDocumentCreatorToDelete(model, Log)
)
}
if (authorizeDocumentCreatorToAssociate) {
policies.push(
restHapiPolicies.authorizeDocumentCreatorToAssociate(model, Log)
)
}
if (model.routeOptions.documentScope) {
policies.push(restHapiPolicies.addDocumentScope(model, Log))
}
}
if (config.enableCreatedBy) {
policies.push(restHapiPolicies.addCreatedBy(model, Log))
}
if (config.enableDuplicateFields) {
policies.push(
restHapiPolicies.populateDuplicateFields(model, mongoose, Log)
)
}
if (config.enableAuditLog) {
policies.push(restHapiPolicies.logCreate(mongoose, model, Log))
}
server.route({
method: 'POST',
path: '/' + resourceAliasForRoute,
config: {
handler: handler,
auth: auth,
cors: config.cors,
description: 'Create one or more new ' + collectionName + 's',
tags: ['api', collectionName],
validate: {
payload: createModel,
headers: createHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 201,
message: 'The resource was created successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{ code: 500, message: 'There was an unknown error.' },
{
code: 503,
message: 'There was a problem with the database.'
}
]
},
policies: policies
},
response: {
failAction: config.enableResponseFail ? 'error' : 'log',
schema: readModel
}
}
})
},
/**
* Creates an endpoint for DELETE /RESOURCE/{_id}
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
generateDeleteOneEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('DeleteOne'))
let collectionName = model.collectionDisplayName || model.modelName
if (config.logRoutes) {
Log.note('Generating Delete One endpoint for ' + collectionName)
}
options = options || {}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateDeleteHandler(model, options, Log)
let payloadModel = null
if (config.enableSoftDelete) {
payloadModel = Joi.object({ hardDelete: Joi.bool() }).allow(null)
if (!config.enablePayloadValidation) {
payloadModel = Joi.alternatives().try(payloadModel, Joi.any())
}
}
let auth = false
let deleteOneHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.deleteAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'delete', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug(
'Scope for DELETE/' + resourceAliasForRoute + '/{_id}' + ':',
scope
)
}
}
} else {
deleteOneHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.deletePolicies || []
)
}
if (config.enableDocumentScopes && auth) {
policies.push(restHapiPolicies.enforceDocumentScopePre(model, Log))
policies.push(restHapiPolicies.enforceDocumentScopePost(model, Log))
}
if (config.enableDeletedBy && config.enableSoftDelete) {
policies.push(restHapiPolicies.addDeletedBy(model, Log))
}
if (config.enableAuditLog) {
policies.push(restHapiPolicies.logDelete(mongoose, model, Log))
}
server.route({
method: 'DELETE',
path: '/' + resourceAliasForRoute + '/{_id}',
config: {
handler: handler,
auth: auth,
cors: config.cors,
description: 'Delete a ' + collectionName,
tags: ['api', collectionName],
validate: {
params: {
_id: Joi.objectId().required()
},
payload: payloadModel,
headers: deleteOneHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 200,
message: 'The resource was deleted successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{
code: 404,
message: 'There was no resource found with that ID.'
},
{ code: 500, message: 'There was an unknown error.' },
{
code: 503,
message: 'There was a problem with the database.'
}
]
},
policies: policies
},
response: {
// TODO: add a response schema if needed
// failAction: config.enableResponseFail ? 'error' : 'log',
// schema: model.readModel ? model.readModel : Joi.object().unknown().optional()
}
}
})
},
/**
* Creates an endpoint for DELETE /RESOURCE/
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
// TODO: handle partial deletes (return list of ids that failed/were not found)
generateDeleteManyEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('DeleteMany'))
let collectionName = model.collectionDisplayName || model.modelName
if (config.logRoutes) {
Log.note('Generating Delete Many endpoint for ' + collectionName)
}
options = options || {}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateDeleteHandler(model, options, Log)
let payloadModel = null
if (config.enableSoftDelete) {
payloadModel = Joi.alternatives().try(
Joi.array().items(
Joi.object({
_id: Joi.objectId(),
hardDelete: Joi.bool().default(false)
})
),
Joi.array().items(Joi.objectId())
)
} else {
payloadModel = Joi.array().items(Joi.objectId())
}
if (!config.enablePayloadValidation) {
payloadModel = Joi.alternatives().try(payloadModel, Joi.any())
}
let auth = false
let deleteManyHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.deleteAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'delete', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug('Scope for DELETE/' + resourceAliasForRoute + ':', scope)
}
}
} else {
deleteManyHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.deletePolicies || []
)
}
if (config.enableDocumentScopes && auth) {
policies.push(restHapiPolicies.enforceDocumentScopePre(model, Log))
policies.push(restHapiPolicies.enforceDocumentScopePost(model, Log))
}
if (config.enableDeletedBy && config.enableSoftDelete) {
policies.push(restHapiPolicies.addDeletedBy(model, Log))
}
if (config.enableAuditLog) {
policies.push(restHapiPolicies.logDelete(mongoose, model, Log))
}
server.route({
method: 'DELETE',
path: '/' + resourceAliasForRoute,
config: {
handler: handler,
auth: auth,
cors: config.cors,
description: 'Delete multiple ' + collectionName + 's',
tags: ['api', collectionName],
validate: {
payload: payloadModel,
headers: deleteManyHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 200,
message: 'The resource was deleted successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{
code: 404,
message: 'There was no resource found with that ID.'
},
{ code: 500, message: 'There was an unknown error.' },
{
code: 503,
message: 'There was a problem with the database.'
}
]
},
policies: policies
},
response: {
// TODO: add a response schema if needed
// failAction: config.enableResponseFail ? 'error' : 'log',
// schema: model.readModel ? model.readModel : Joi.object().unknown().optional()
}
}
})
},
/**
* Creates an endpoint for PUT /RESOURCE/{_id}
* @param server: A Hapi server.
* @param model: A mongoose model.
* @param options: Options object.
* @param logger: A logging object.
*/
generateUpdateEndpoint: function(server, model, options, logger) {
// This line must come first
validationHelper.validateModel(model, logger)
const Log = logger.bind(chalk.yellow('Update'))
let collectionName = model.collectionDisplayName || model.modelName
if (config.logRoutes) {
Log.note('Generating Update endpoint for ' + collectionName)
}
options = options || {}
let resourceAliasForRoute
if (model.routeOptions) {
resourceAliasForRoute = model.routeOptions.alias || model.modelName
} else {
resourceAliasForRoute = model.modelName
}
let handler = HandlerHelper.generateUpdateHandler(model, options, Log)
let updateModel = joiMongooseHelper.generateJoiUpdateModel(model, Log)
if (!config.enablePayloadValidation) {
let label = updateModel._flags.label
updateModel = Joi.alternatives()
.try(updateModel, Joi.any())
.label(label)
}
let readModel = joiMongooseHelper.generateJoiReadModel(model, Log)
if (!config.enableResponseValidation) {
let label = readModel._flags.label
readModel = Joi.alternatives()
.try(readModel, Joi.any())
.label(label)
}
let auth = false
let updateHeadersValidation = Object.assign(headersValidation, {})
if (config.authStrategy && model.routeOptions.updateAuth !== false) {
auth = {
strategy: config.authStrategy
}
let scope = authHelper.generateScopeForEndpoint(model, 'update', Log)
if (!_.isEmpty(scope)) {
auth.scope = scope
if (config.logScopes) {
Log.debug(
'Scope for PUT/' + resourceAliasForRoute + '/{_id}' + ':',
scope
)
}
}
} else {
updateHeadersValidation = null
}
let policies = []
if (model.routeOptions.policies && config.enablePolicies) {
policies = model.routeOptions.policies
policies = (policies.rootPolicies || []).concat(
policies.updatePolicies || []
)
}
if (config.enableDocumentScopes && auth) {
policies.push(restHapiPolicies.enforceDocumentScopePre(model, Log))
policies.push(restHapiPolicies.enforceDocumentScopePost(model, Log))
}
if (config.enableUpdatedBy) {
policies.push(restHapiPolicies.addUpdatedBy(model, Log))
}
if (config.enableDuplicateFields) {
policies.push(
restHapiPolicies.populateDuplicateFields(model, mongoose, Log)
)
if (config.trackDuplicatedFields) {
policies.push(
restHapiPolicies.trackDuplicatedFields(model, mongoose, Log)
)
}
}
if (config.enableAuditLog) {
policies.push(restHapiPolicies.logUpdate(mongoose, model, Log))
}
server.route({
method: 'PUT',
path: '/' + resourceAliasForRoute + '/{_id}',
config: {
handler: handler,
auth: auth,
cors: config.cors,
description: 'Update a ' + collectionName,
tags: ['api', collectionName],
validate: {
params: {
_id: Joi.objectId().required()
},
payload: updateModel,
headers: updateHeadersValidation
},
plugins: {
model: model,
'hapi-swagger': {
responseMessages: [
{
code: 200,
message: 'The resource was updated successfully.'
},
{ code: 400, message: 'The request was malformed.' },
{
code: 401,
message:
'The authentication header was missing/malformed, or the token has expired.'
},
{
code: 404,
message: 'There was no resource found with that ID.'
},