mirror of
https://github.com/serverless/serverless.git
synced 2026-01-18 14:58:43 +00:00
746 lines
21 KiB
JavaScript
746 lines
21 KiB
JavaScript
'use strict';
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/**
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* Action: Endpoint Build ApiGateway
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* - Creates API Gateway endpoints on the AWS account.
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* - Handles one endpoint only in one region. The FunctionDeploy Action orchestrates this.
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*/
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const SPlugin = require('../ServerlessPlugin'),
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SError = require('../ServerlessError'),
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SUtils = require('../utils/index'),
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BbPromise = require('bluebird'),
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path = require('path'),
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fs = require('fs'),
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os = require('os');
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// Promisify fs module.
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BbPromise.promisifyAll(fs);
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class EndpointBuildApiGateway extends SPlugin {
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/**
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* Constructor
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*/
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constructor(S, config) {
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super(S, config);
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}
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/**
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* Get Name
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*/
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static getName() {
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return 'serverless.core.' + EndpointBuildApiGateway.name;
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}
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/**
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* Register Actions
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*/
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registerActions() {
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this.S.addAction(this.endpointBuildApiGateway.bind(this), {
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handler: 'endpointBuildApiGateway',
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description: 'Provision one or multiple endpoints on API Gateway',
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});
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return BbPromise.resolve();
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}
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/**
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* Endpoint Build ApiGateway
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*/
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endpointBuildApiGateway(evt) {
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let builder = new Builder(this.S);
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return builder.build(evt);
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}
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}
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/**
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* Builder
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* - Necessary for this action to run concurrently
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*/
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class Builder {
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constructor(S) {
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this.S = S;
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}
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build(evt) {
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let _this = this;
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return _this._validateAndPrepare(evt)
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.bind(_this)
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.then(_this._fetchDeployedLambda)
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.then(_this._getApiResources)
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.then(_this._createEndpointResources)
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.then(_this._createEndpointMethod)
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.then(_this._createEndpointIntegration)
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.then(_this._createEndpointMethodResponses)
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.then(_this._createEndpointMethodIntegResponses)
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.then(_this._manageLambdaAccessPolicy)
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.then(function() {
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evt.endpoint.url = 'https://'
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+ evt.region.restApiId
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+ '.execute-api.'
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+ evt.region.region
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+ '.amazonaws.com/'
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+ evt.stage
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+ '/'
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+ evt.endpoint.path;
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SUtils.sDebug(
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'"'
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+ evt.stage
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+ '" successfully deployed endpoint to API Gateway in the region "'
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+ evt.region.region
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+ '". Access it via '
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+ evt.endpoint.method
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+ ' @ '
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+ evt.endpoint.url);
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return evt;
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});
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}
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/**
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* Validate And Prepare
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*/
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_validateAndPrepare(evt) {
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let _this = this;
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// Get AWS Account Number
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evt.awsAccountNumber = evt.region.iamRoleArnLambda.replace('arn:aws:iam::', '').split(':')[0];
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// Load AWS Service Instances
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let awsConfig = {
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region: evt.region.region,
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accessKeyId: _this.S._awsAdminKeyId,
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secretAccessKey: _this.S._awsAdminSecretKey,
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};
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_this.CloudFormation = require('../utils/aws/CloudFormation')(awsConfig);
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_this.ApiGateway = require('../utils/aws/ApiGateway')(awsConfig);
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_this.Lambda = require('../utils/aws/Lambda')(awsConfig);
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// Validate and sanitize endpoint attributes
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if (!evt.endpoint.path) {
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throw new SError('Endpoint does not have a "path" property');
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}
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if (!evt.endpoint.method) {
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throw new SError('Endpoint does not have a "method" property');
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}
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if (!evt.endpoint.authorizationType) {
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throw new SError('Endpoint does not have a "authorizationType" property');
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}
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if (typeof evt.endpoint.apiKeyRequired === 'undefined') {
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throw new SError('Endpoint does not have a "apiKeyRequired" property');
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}
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if (!evt.endpoint.requestTemplates) {
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throw new SError('Endpoint does not have a "requestTemplates" property');
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}
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if (!evt.endpoint.requestParameters) {
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throw new SError('Endpoint does not have a "requestParameters" property');
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}
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if (!evt.endpoint.responses) {
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throw new SError('Endpoint does not have a "responses" property');
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}
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// Sanitize path
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if (evt.endpoint.path.charAt(0) === '/') evt.endpoint.path = evt.endpoint.path.substring(1);
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// Sanitize method
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evt.endpoint.method = evt.endpoint.method.toUpperCase();
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// Prepare StatementId
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evt.endpoint.statementId = ('s-apig-' + evt.endpoint.path + '-' + evt.endpoint.method).replace(/\//g, '_');
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return BbPromise.resolve(evt);
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}
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/**
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* Fetch Deployed Lambda
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* @private
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*/
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_fetchDeployedLambda(evt) {
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let _this = this;
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let params = {
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FunctionName: _this.Lambda.sGetLambdaName(_this.S._projectJson, evt.endpoint.function), /* required */
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Qualifier: evt.stage
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};
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return _this.Lambda.getFunctionPromised(params)
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.then(function(data) {
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evt.endpoint.lambda = data.Configuration;
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return evt;
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});
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}
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/**
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* Get API Resources
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* @returns {Promise}
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* @private
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*/
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_getApiResources(evt) {
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let _this = this;
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let params = {
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restApiId: evt.region.restApiId, /* required */
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limit: 500
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};
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// List all Resources for this REST API
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return _this.ApiGateway.getResourcesPromised(params)
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.then(function(response) {
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evt.apiResources = response.items;
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// Get Parent Resource ID
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for (let i = 0; i < evt.apiResources.length; i++) {
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if (evt.apiResources[i].path === '/') {
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evt.apiParentResourceId = evt.apiResources[i].id;
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}
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}
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SUtils.sDebug(
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'"'
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+ evt.stage + ' - '
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+ evt.region.region
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+ '": found '
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+ evt.apiResources.length
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+ ' existing Resources on API Gateway');
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return evt;
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});
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}
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/**
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* Create Endpoint Resources
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* @returns {Promise}
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* @private
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*/
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_createEndpointResources(evt) {
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let _this = this,
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endpoint = evt.endpoint,
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eResources = endpoint.path.split('/');
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/**
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* Private Function to find resource
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* @param resource
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* @param parent
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* @returns {*}
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*/
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let findEndpointResource = function(resource, parent) {
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// Replace slashes in resource
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resource = resource.replace(/\//g, '');
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let index = eResources.indexOf(resource),
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resourcePath,
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resourceIndex;
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if (parent) {
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index = index - 1;
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resource = eResources[index];
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}
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if (index < 0) {
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resourcePath = '/';
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} else {
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resourceIndex = endpoint.path.indexOf(resource);
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resourcePath = '/' + endpoint.path.substring(0, resourceIndex + resource.length);
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}
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// If resource has already been created, skip it
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for (let i = 0; i < evt.apiResources.length; i++) {
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// Check if path matches, in case there are duplicate resources (users/list, org/list)
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if (evt.apiResources[i].path === resourcePath) {
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return evt.apiResources[i];
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}
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}
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};
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return BbPromise.try(function() {
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return eResources;
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}).each(function(eResource) {
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// Remove slashes in resource
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eResource = eResource.replace(/\//g, '');
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// If resource exists, skip it
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let resource = findEndpointResource(eResource);
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if (resource) return resource;
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// Get Parent Resource
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evt.apiParentResourceId = findEndpointResource(eResource, true).id;
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let params = {
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parentId: evt.apiParentResourceId, /* required */
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pathPart: eResource, /* required */
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restApiId: evt.region.restApiId /* required */
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};
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// Create Resource
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return _this.ApiGateway.createResourcePromised(params)
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.then(function(response) {
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// Add resource to _this.resources and callback
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evt.apiResources.push(response);
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SUtils.sDebug(
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'"'
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+ evt.stage + ' - '
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+ evt.region.region
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+ ' - ' + evt.endpoint.path + '": '
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+ 'created resource: '
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+ response.pathPart);
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});
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}).then(function() {
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// Attach the last resource to endpoint for later use
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let endpointResource = endpoint.path.split('/').pop().replace(/\//g, '');
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evt.resource = findEndpointResource(endpointResource);
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return evt;
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});
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}
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/**
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* Create Endpoint Method
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* @returns {Promise}
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* @private
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*/
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_createEndpointMethod(evt) {
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let _this = this,
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endpoint = evt.endpoint,
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requestParameters = {};
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// If Request Params, add them
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if (endpoint.RequestParameters) {
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// Format them per APIG API's Expectations
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for (let prop in endpoint.requestParameters) {
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let requestParam = endpoint.requestParameters[prop];
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requestParameters[requestParam] = true;
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}
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}
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let params = {
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId /* required */
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};
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return _this.ApiGateway.getMethodPromised(params)
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.then(function(response) {
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// Method exists. Delete and recreate it.
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// First, save integration's Lambda aliasEndpoint, if any
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if (response.methodIntegration) {
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evt.prevIntegration = response.methodIntegration;
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}
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let params = {
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId /* required */
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};
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return _this.ApiGateway.deleteMethodPromised(params)
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.then(function() {
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let params = {
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authorizationType: endpoint.authorizationType, /* required */
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId, /* required */
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apiKeyRequired: endpoint.apiKeyRequired,
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requestModels: endpoint.requestModels,
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requestParameters: requestParameters
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};
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return _this.ApiGateway.putMethodPromised(params);
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});
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}, function(error) {
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// Method does not exist. Create it.
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let params = {
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authorizationType: endpoint.authorizationType, /* required */
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId, /* required */
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apiKeyRequired: endpoint.apiKeyRequired,
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requestModels: endpoint.requestModels,
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requestParameters: requestParameters
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};
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return _this.ApiGateway.putMethodPromised(params);
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})
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.delay(250) // API Gateway takes time to delete Methods. Might have to increase this.
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.then(function(response) {
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SUtils.sDebug(
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'"'
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+ evt.stage + ' - '
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+ evt.region.region
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+ ' - ' + evt.endpoint.path + '": '
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+ 'created method: '
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+ endpoint.method);
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return evt;
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});
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}
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/**
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* Create Endpoint Integration
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*/
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_createEndpointIntegration(evt) {
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let _this = this,
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endpoint = evt.endpoint;
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// Alias Lambda, default ot $LATEST
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let alias;
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if (evt.aliasEndpoint) alias = evt.aliasEndpoint;
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else alias = '${stageVariables.functionAlias}';
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let params = {
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId, /* required */
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type: 'AWS', /* required */
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cacheKeyParameters: endpoint.cacheKeyParameters || [],
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cacheNamespace: endpoint.cacheNamespace || null,
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// Due to a bug in API Gateway reported here: https://github.com/awslabs/aws-apigateway-swagger-importer/issues/41
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// Specifying credentials within API Gateway causes extra latency (~500ms)
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// Until API Gateway is fixed, we need to make a separate call to Lambda to add credentials to API Gateway
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// Once API Gateway is fixed, we can use this in credentials:
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// _this._regionJson.iamRoleArnApiGateway
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credentials: null,
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integrationHttpMethod: 'POST',
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requestParameters: endpoint.requestParameters || {},
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requestTemplates: endpoint.requestTemplates || {},
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uri: 'arn:aws:apigateway:' // Make ARN for apigateway - lambda
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+ evt.region.region
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+ ':lambda:path/2015-03-31/functions/arn:aws:lambda:'
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+ evt.region.region
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+ ':'
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+ evt.awsAccountNumber
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+ ':function:'
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+ evt.endpoint.lambda.FunctionName
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+ ':'
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+ alias
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+ '/invocations'
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};
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// Create Integration
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return _this.ApiGateway.putIntegrationPromised(params)
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.then(function(response) {
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// Save integration
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evt.integration = response;
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SUtils.sDebug(
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'"'
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+ evt.stage + ' - '
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+ evt.region.region
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+ ' - ' + evt.endpoint.path + '": '
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+ 'created integration with the type: AWS');
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return evt;
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})
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.catch(function(error) {
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throw new SError(
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error.message,
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SError.errorCodes.UNKNOWN);
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});
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}
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/**
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* Create Endpoint Method Response
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*/
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_createEndpointMethodResponses(evt) {
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let _this = this,
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endpoint = evt.endpoint;
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return BbPromise.try(function() {
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// Collect Response Keys
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if (endpoint.responses) return Object.keys(endpoint.responses);
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else return [];
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})
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.each(function(responseKey) {
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// Iterate through each response to be created
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let thisResponse = endpoint.responses[responseKey];
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let responseParameters = {};
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let responseModels = {};
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// If Response Params, add them
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if (thisResponse.responseParameters) {
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// Format Response Parameters per APIG API's Expectations
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for (let prop in thisResponse.responseParameters) {
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responseParameters[prop] = true;
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}
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}
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// If Request models, add them
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if (thisResponse.responseModels) {
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// Format Response Models per APIG API's Expectations
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for (let name in thisResponse.responseModels) {
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let value = thisResponse.responseModels[name];
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responseModels[name] = value;
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}
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}
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let params = {
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId, /* required */
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statusCode: thisResponse.statusCode, /* required */
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responseModels: responseModels,
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responseParameters: responseParameters
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};
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// Create Method Response
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return _this.ApiGateway.putMethodResponsePromised(params)
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.then(function() {
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SUtils.sDebug(
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'"'
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+ evt.stage + ' - '
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+ evt.region.region
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+ ' - ' + evt.endpoint.path + '": '
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+ 'created method response');
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})
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.catch(function(error) {
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throw new SError(error.message);
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});
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})
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.then(function() {
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return evt;
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});
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}
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/**
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* Create Method Integration Response
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*/
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_createEndpointMethodIntegResponses(evt) {
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let _this = this,
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endpoint = evt.endpoint;
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return BbPromise.try(function() {
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// Collect Response Keys
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if (endpoint.responses) return Object.keys(endpoint.responses);
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else return [];
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})
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.each(function(responseKey) {
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let thisResponse = endpoint.responses[responseKey];
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// Add Response Parameters
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let responseParameters = thisResponse.responseParameters || {};
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// Add Response Templates
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let responseTemplates = thisResponse.responseTemplates || {};
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// Add SelectionPattern
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let selectionPattern = thisResponse.selectionPattern || (responseKey === 'default' ? null : responseKey);
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let params = {
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httpMethod: endpoint.method, /* required */
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resourceId: evt.resource.id, /* required */
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restApiId: evt.region.restApiId, /* required */
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statusCode: thisResponse.statusCode, /* required */
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responseParameters: responseParameters,
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responseTemplates: responseTemplates,
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selectionPattern: selectionPattern,
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};
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// Create Integration Response
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return _this.ApiGateway.putIntegrationResponsePromised(params)
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.then(function() {
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|
|
SUtils.sDebug(
|
|
'"'
|
|
+ evt.stage + ' - '
|
|
+ evt.region.region
|
|
+ ' - ' + evt.endpoint.path + '": '
|
|
+ 'created method integration response');
|
|
|
|
}).catch(function(error) {
|
|
throw new SError(error.message);
|
|
});
|
|
})
|
|
.then(function() {
|
|
return evt;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Manage Lambda Access Policy
|
|
*/
|
|
|
|
_manageLambdaAccessPolicy(evt) {
|
|
|
|
let _this = this;
|
|
|
|
// If method integration is not for a lambda, skip
|
|
if (!evt.endpoint.lambda) return Promise.resolve();
|
|
|
|
return _this._getLambdaAccessPolicy(evt)
|
|
.bind(_this)
|
|
.then(_this._removeLambdaPermissionForEndpoint)
|
|
.then(_this._addLambdaPermissionForEndpoint);
|
|
}
|
|
|
|
/**
|
|
* Get Lambda Access Policy
|
|
* - Since specifying credentials when creating the Method Integration results in ~500ms
|
|
* - of extra latency, this function updates the lambda's access policy instead
|
|
* - to grant API Gateway permission. This is how the API Gateway console does it.
|
|
* - But this is not finished and the "getPolicy" method in the SDK is broken, so this
|
|
* - is currently impossible to implement.
|
|
*/
|
|
|
|
_getLambdaAccessPolicy(evt) {
|
|
|
|
let _this = this;
|
|
|
|
let params = {
|
|
FunctionName: evt.endpoint.lambda.FunctionArn, /* required */
|
|
//Qualifier: 'STRING_VALUE'
|
|
};
|
|
|
|
return _this.Lambda.getPolicyPromised(params)
|
|
.then(function(data) {
|
|
evt.endpoint.lambdaPolicy = JSON.parse(data.Policy);
|
|
return evt;
|
|
})
|
|
.catch(function(e) {
|
|
return evt;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Remove Lambda Access Policy
|
|
*/
|
|
|
|
_removeLambdaPermissionForEndpoint(evt) {
|
|
|
|
let _this = this,
|
|
statement;
|
|
|
|
if (evt.endpoint.lambdaPolicy) {
|
|
let policy = evt.endpoint.lambdaPolicy;
|
|
for (let i = 0; i < policy.Statement.length; i++) {
|
|
statement = policy.Statement[i];
|
|
if (statement.Sid && statement.Sid === evt.endpoint.statementId) continue;
|
|
}
|
|
}
|
|
|
|
if (!statement) return BbPromise.resolve(evt);
|
|
|
|
let params = {
|
|
FunctionName: evt.endpoint.lambda.FunctionArn, /* required */
|
|
StatementId: evt.endpoint.statementId, /* required */
|
|
//Qualifier: 'STRING_VALUE'
|
|
};
|
|
|
|
return _this.Lambda.removePermissionPromised(params)
|
|
.then(function(data) {
|
|
|
|
SUtils.sDebug(
|
|
'"'
|
|
+ evt.stage + ' - '
|
|
+ evt.region.region
|
|
+ ' - ' + evt.endpoint.path + '": '
|
|
+ 'removed existing lambda access policy statement');
|
|
|
|
return evt;
|
|
})
|
|
.catch(function(error) {
|
|
return evt;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Add Lambda Permission For Endpoint
|
|
*/
|
|
|
|
_addLambdaPermissionForEndpoint(evt) {
|
|
|
|
let _this = this,
|
|
endpoint = evt.endpoint;
|
|
|
|
// Sanitize Path - Remove first and last slashes, if any
|
|
endpoint.path = endpoint.path.split('/');
|
|
endpoint.path = endpoint.path.join('/');
|
|
|
|
// Create new access policy statement
|
|
let params = {};
|
|
params.Action = 'lambda:InvokeFunction';
|
|
params.FunctionName = evt.endpoint.lambda.FunctionArn;
|
|
params.Principal = 'apigateway.amazonaws.com';
|
|
params.StatementId = evt.endpoint.statementId;
|
|
params.SourceArn = 'arn:aws:execute-api:'
|
|
+ evt.region.region
|
|
+ ':'
|
|
+ evt.awsAccountNumber
|
|
+ ':'
|
|
+ evt.region.restApiId
|
|
+ '/*/'
|
|
+ endpoint.method
|
|
+ '/'
|
|
+ endpoint.path;
|
|
|
|
return _this.Lambda.addPermissionPromised(params)
|
|
.then(function(data) {
|
|
|
|
SUtils.sDebug(
|
|
'"'
|
|
+ evt.stage + ' - '
|
|
+ evt.region.region
|
|
+ ' - ' + evt.endpoint.path + '": '
|
|
+ 'added permission to Lambda');
|
|
|
|
return evt;
|
|
|
|
})
|
|
.catch(function(error) {
|
|
return endpoint;
|
|
});
|
|
}
|
|
|
|
}
|
|
|
|
module.exports = EndpointBuildApiGateway; |