fix: use isomorphic solution for base64 encoding (#2526)

btoa npm dependency was using Buffer without an import.
This causes probles in bundler environemnt and Node.js
polyfills needs to be applied.

Refs swagger-api/swagger-editor#3042

package.json

@@ -5,7 +5,10 @@
   "browser": {
     "./src/http/fold-formdata-to-request.node.js": "./src/http/fold-formdata-to-request.browser.js",
     "./lib/http/fold-formdata-to-request.node.js": "./lib/http/fold-formdata-to-request.browser.js",
-    "./es/http/fold-formdata-to-request.node.js": "./es/http/fold-formdata-to-request.browser.js"
+    "./es/http/fold-formdata-to-request.node.js": "./es/http/fold-formdata-to-request.browser.js",
+    "./src/helpers/btoa.node.js": "./src/helpers/btoa.browser.js",
+    "./lib/helpers/btoa.node.js": "./lib/helpers/btoa.browser.js",
+    "./es/helpers/btoa.node.js": "./es/helpers/btoa.browser.js"
   },
   "main": "lib/commonjs.js",
   "module": "es/index.js",
@@ -106,7 +109,6 @@
   },
   "dependencies": {
     "@babel/runtime-corejs3": "^7.11.2",
-    "btoa": "^1.2.1",
     "cookie": "~0.5.0",
     "cross-fetch": "^3.1.5",
     "deepmerge": "~4.2.2",

src/execute/index.js

@@ -9,7 +9,7 @@ import SWAGGER2_PARAMETER_BUILDERS from './swagger2/parameter-builders.js';
 import * as OAS3_PARAMETER_BUILDERS from './oas3/parameter-builders.js';
 import oas3BuildRequest from './oas3/build-request.js';
 import swagger2BuildRequest from './swagger2/build-request.js';
-import { getOperationRaw, legacyIdFromPathMethod, isOAS3 } from '../helpers.js';
+import { getOperationRaw, legacyIdFromPathMethod, isOAS3 } from '../helpers/index.js';
 
 const arrayOrEmpty = (ar) => (Array.isArray(ar) ? ar : []);
 

src/execute/oas3/build-request.js

@@ -2,7 +2,8 @@
 // `src/execute/index.js#buildRequest`
 import { isPlainObject } from 'is-plain-object';
 import get from 'lodash/get';
-import btoa from 'btoa';
+
+import btoa from '../../helpers/btoa.node.js';
 
 export default function buildRequest(options, req) {
   const { operation, requestBody, securities, spec, attachContentTypeForEmptyPayload } = options;

src/execute/swagger2/build-request.js

@@ -1,4 +1,4 @@
-import btoa from 'btoa';
+import btoa from '../../helpers/btoa.node.js';
 
 // This function runs after the common function,
 // `src/execute/index.js#buildRequest`

src/helpers/btoa.browser.js

@@ -0,0 +1,19 @@
+/* eslint-disable no-undef, no-restricted-globals */
+
+const globalObject = (() => {
+  // new standardized access to the global object
+  if (typeof globalThis !== 'undefined') {
+    return globalThis;
+  }
+
+  // WebWorker specific access
+  if (typeof self !== 'undefined') {
+    return self;
+  }
+
+  return window;
+})();
+
+const { btoa } = globalObject;
+
+export default btoa;

src/helpers/btoa.node.js

@@ -0,0 +1,15 @@
+import { Buffer } from 'buffer';
+
+const btoa = (val) => {
+  let buffer;
+
+  if (val instanceof Buffer) {
+    buffer = val;
+  } else {
+    buffer = Buffer.from(val.toString(), 'binary');
+  }
+
+  return buffer.toString('base64');
+};
+
+export default btoa;

src/index.js

@@ -5,7 +5,7 @@ import Resolver, { clearCache } from './resolver.js';
 import resolveSubtree from './subtree-resolver/index.js';
 import { makeApisTagOperation } from './interfaces.js';
 import { execute, buildRequest, baseUrl } from './execute/index.js';
-import { opId } from './helpers.js';
+import { opId } from './helpers/index.js';
 
 Swagger.http = Http;
 Swagger.makeHttp = makeHttp.bind(null, Swagger.http);

src/interfaces.js

@@ -1,4 +1,4 @@
-import { eachOperation, opId } from './helpers.js';
+import { eachOperation, opId } from './helpers/index.js';
 
 const nullFn = () => null;
 

src/resolver.js

@@ -1,6 +1,6 @@
 import Http from './http/index.js';
 import mapSpec, { plugins } from './specmap/index.js';
-import { normalizeSwagger } from './helpers.js';
+import { normalizeSwagger } from './helpers/index.js';
 import { ACCEPT_HEADER_VALUE_FOR_DOCUMENTS } from './constants.js';
 
 export function makeFetchJSON(http, opts = {}) {

src/subtree-resolver/index.js

@@ -24,7 +24,7 @@
 import get from 'lodash/get';
 
 import resolve from '../resolver.js';
-import { normalizeSwagger } from '../helpers.js';
+import { normalizeSwagger } from '../helpers/index.js';
 
 export default async function resolveSubtree(obj, path, opts = {}) {
   const {

test/execute/main.js

@@ -2,7 +2,7 @@ import { Readable } from 'stream';
 import AbortController from 'abort-controller';
 
 import { execute, buildRequest, self as stubs } from '../../src/execute/index.js';
-import { normalizeSwagger } from '../../src/helpers.js';
+import { normalizeSwagger } from '../../src/helpers/index.js';
 
 // Supported shape...  { spec, operationId, parameters, securities, fetch }
 // One can use operationId or pathItem + method

test/helpers.js

@@ -1,4 +1,4 @@
-import { normalizeSwagger, getOperationRaw, idFromPathMethod } from '../src/helpers.js';
+import { normalizeSwagger, getOperationRaw, idFromPathMethod } from '../src/helpers/index.js';
 
 describe('helpers', () => {
   describe('idFromPathMethod', () => {

test/oas3/execute/authorization.js

@@ -1,5 +1,4 @@
-import btoa from 'btoa';
-
+import btoa from '../../../src/helpers/btoa.node.js';
 import { buildRequest } from '../../../src/execute/index.js';
 
 // OAS 3.0 Authorization

test/oas3/helpers.js

@@ -1,4 +1,4 @@
-import { isOAS3, isSwagger2 } from '../../src/helpers.js';
+import { isOAS3, isSwagger2 } from '../../src/helpers/index.js';
 
 describe('helpers - OpenAPI Specification 3.0', () => {
   describe('isOAS3', () => {