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feat: Add the mini server + add unit testing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| /** | ||
| * Copyright (c) 2017, Neap Pty Ltd. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| */ | ||
| const path = require('path') | ||
| const fs = require('fs') | ||
| const httpError = require('http-errors') | ||
|
|
||
| let webconfig = null | ||
| const getWebConfig = () => { | ||
| if (webconfig == null) { | ||
| /*eslint-disable */ | ||
| const webconfigPath = path.join(process.cwd(), 'webconfig.json') | ||
| /*eslint-enable */ | ||
| webconfig = fs.existsSync(webconfigPath) ? require(webconfigPath) : undefined | ||
| } | ||
| return webconfig | ||
| } | ||
|
|
||
| let headersCollection = null | ||
| const getHeadersCollection = (headers = {}, memoize) => { | ||
| if (!memoize || headersCollection == null) { | ||
| headersCollection = [] | ||
| for (let key in headers) | ||
| headersCollection.push({ key, value: headers[key] }) | ||
| } | ||
| return headersCollection | ||
| } | ||
|
|
||
| let allowedOrigins = null | ||
| const getAllowedOrigins = (headers = {}, memoize) => { | ||
| if (!memoize || allowedOrigins == null) { | ||
| allowedOrigins = (headers['Access-Control-Allow-Origin'] || '').split(',') | ||
| .reduce((a, s) => { | ||
| if (s) | ||
| a[s.trim().toLowerCase().replace(/\/$/,'')] = true | ||
| return a | ||
| }, {}) | ||
| } | ||
| return allowedOrigins | ||
| } | ||
|
|
||
| let allowedMethods = null | ||
| const getAllowedMethods = (headers = {}, memoize) => { | ||
| if (!memoize || allowedMethods == null) { | ||
| allowedMethods = (headers['Access-Control-Allow-Methods'] || '').split(',') | ||
| .reduce((a, s) => { | ||
| if (s) | ||
| a[s.trim().toLowerCase()] = true | ||
| return a | ||
| }, {}) | ||
| } | ||
| return allowedMethods | ||
| } | ||
|
|
||
| const setResponseHeaders = (res, webconfig) => Promise.resolve((webconfig || getWebConfig() || {}).headers) | ||
| .then(headers => getHeadersCollection(headers, !webconfig).reduce((response, header) => res.set(header.key, header.value), res)) | ||
|
|
||
| const handleHttpRequest = (req, res, webconfig) => Promise.resolve(webconfig || getWebConfig() || {}) | ||
| .then(webConfig => { | ||
| const headers = webConfig.headers | ||
| const memoize = !webconfig | ||
| const origins = getAllowedOrigins(headers, memoize) | ||
| const methods = getAllowedMethods(headers, memoize) | ||
| const origin = new String(req.headers.origin).toLowerCase() | ||
| const referer = new String(req.headers.referer).toLowerCase() | ||
| const method = new String(req.method).toLowerCase() | ||
| const sameOrigin = referer.indexOf(origin) == 0 | ||
|
|
||
| // Check CORS | ||
| if (Object.keys(origins).length == 0 && !sameOrigin) { | ||
| setResponseHeaders(res, webConfig) | ||
| throw httpError(403, `Forbidden - CORS issue. Origin '${origin}' is not allowed.`) | ||
| } | ||
| if (!origins['*'] && Object.keys(origins).length != 0 && !(origin in origins)) { | ||
| setResponseHeaders(res, webConfig) | ||
| throw httpError(403, `Forbidden - CORS issue. Origin '${origin}' is not allowed.`) | ||
| } | ||
| if (Object.keys(methods).length != 0 && method != 'get' && method != 'head' && !(method in methods)) { | ||
| setResponseHeaders(res, webConfig) | ||
| throw httpError(403, `Forbidden - CORS issue. Method '${method.toUpperCase()}' is not allowed.`) | ||
| } | ||
|
|
||
| if (method == 'head' || method == 'options') | ||
| return setResponseHeaders(res, webConfig).then(res => res.status(200).send()) | ||
| }) | ||
|
|
||
| const serveHttp = (processHttpRequest, webconfig) => (req, res) => handleHttpRequest(req, res, webconfig) | ||
| .then(() => !res.headersSent ? processHttpRequest(req, res) : res) | ||
|
|
||
| module.exports = { | ||
| setResponseHeaders, | ||
| handleHttpRequest, | ||
| serveHttp | ||
| } |
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