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<!DOCTYPE html><html lang="en" style="font-size:16px"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Source: router/Request.js</title><!--[if lt IE 9]>
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href="RouterResponse.html">RouterResponse</a></div><div class="sidebar-section-children"><a href="RouterStack.html">RouterStack</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-global"><div>Global</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="global.html#getRoutes">getRoutes</a></div><div class="sidebar-section-children"><a href="global.html#loadRoutes">loadRoutes</a></div></div></div></div></div><div class="navbar-container" id="VuAckcnZhf"><nav class="navbar"><div class="navbar-left-items"></div><div class="navbar-right-items"><div class="navbar-right-item"><button class="icon-button search-button" aria-label="open-search"><svg><use xlink:href="#search-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button theme-toggle" aria-label="toggle-theme"><svg><use class="theme-svg-use" xlink:href="#light-theme-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button font-size" aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div><nav></nav></nav></div><div class="toc-container"><div class="toc-content"><span class="bold">On this page</span><div id="eed4d2a0bfd64539bb9df78095dec881"></div></div></div><div class="body-wrapper"><div class="main-content"><div class="main-wrapper"><section id="source-page" class="source-page"><header><h1 id="title" class="has-anchor">router_Request.js</h1></header><article><pre class="prettyprint source lang-js"><code>/**
* lambda-lambda-lambda/router
* AWS Lambda@Edge serverless application router.
*
* Copyright 2021-2023, Marc S. Brooks (https://mbrooks.info)
* Licensed under the MIT license:
* http://www.opensource.org/licenses/mit-license.php
*/
'use strict';
// Local modules.
const {RouterError} = require('./Error');
/**
* Provides AWS CloudFront request instance and methods.
*
* @see https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-event-structure.html#example-origin-request
*/
class RouterRequest {
/**
* @param {CloudFrontRequest} cfReqObj
* CloudFront request object.
*/
constructor(cfReqObj) {
this.cfReqObj = cfReqObj;
this.plugins = {};
Object.seal(this);
}
/**
* Return CloudFront request object.
*
* @return {CloudFrontRequest}
*/
data() {
return this.cfReqObj;
}
/**
* Return value for given HTTP header name.
*
* @param {String} name
* HTTP header name.
*
* @return {String|undefined}
*
* @example
* const value = req.header('Content-Type');
* // text/html
*/
header(name) {
const headers = this.getHeaders();
let value;
Object.keys(headers).forEach(function(key) {
if (name && key === name.toLowerCase()) {
value = headers[key][0].value;
}
});
return value;
}
/**
* Check Accept matches the given value.
*
* @param {String} mimeType
* MIME type value.
*
* @return {Boolean}
*
* @example
* const value = req.is('text/html');
* // true
*/
is(mimeType) {
return (this.header('Accept') === mimeType);
}
/**
* Return the HTTP request parameters or name/value.
*
* @param {String} name
* Parameter name (optional).
*
* @return {String|Object|undefined}
*
* @example
* const params = req.param();
* // {name: 'value'}
*
* const value = req.param('name');
* // value
*/
param(name) {
let obj = {};
if (this.queryString()) {
obj = RouterRequest.parseParams(this.queryString());
} else if (this.body()) {
obj = RouterRequest.parseBody(this.body());
}
if (Object.keys(obj).length > 0) {
if (name) {
return obj[name];
}
return obj;
}
}
/**
* Return the HTTP method of the request.
*
* @return {String}
*/
method() {
return this.data().method;
}
/**
* Return the serialized query parameters.
*
* @return {String}
*/
queryString() {
return this.data().querystring;
}
/**
* Return the relative path of the requested object.
*
* @return {String}
*/
uri() {
return this.data().uri;
}
/**
* Return the HTTP client IP (remote address).
*
* @return {String}
*/
clientIp() {
return this.data().clientIp;
}
/**
* Return the base64-encoded body data.
*
* @return {String}
*/
body() {
return this.data().body.data;
}
/**
* Return the headers of the request.
*
* @return {CloudFrontFunctionsHeaders}
*/
getHeaders() {
return this.data().headers;
}
/**
* Set/Get value passed down the application stack.
*
* @param {String} name
* Plugin name.
*
* @param {*} value
* Plugin value.
*
* @return {*|undefined}
*
* @example
* req.plugin('name', 'value');
*
* ..
*
* const value = req.plugin('name');
* // value
*/
plugin(name, value) {
const plugin = this.plugins[name];
if ((!plugin && name && value) || (plugin && value)) {
return this.plugins[name] = value;
} else if (plugin && !value) {
return this.plugins[name];
}
throw new RouterError(`Plugin "${name}" doesn't exist`);
}
/**
* Convert base64-encoded request body to object.
*
* @param {String} str
* base64 string.
*
* @return {Object|undefined}
*/
static parseBody(str) {
const body = Buffer.from(
str, 'base64'
).toString();
if (RouterRequest.isJson(body)) {
return JSON.parse(body);
}
if (RouterRequest.isParams(body)) {
return RouterRequest.parseParams(body);
}
}
/**
* Convert serialized query string to object.
*
* @param {String} str
* Parameter name/value pairs.
*
* @return {Object}
*/
static parseParams(str) {
return Object.fromEntries(new URLSearchParams(str));
}
/**
* Check valid HTTP request parameters.
*
* @param {String} str
* Parameter name/value pairs.
*
* @return {Boolean}
*/
static isParams(str) {
const values = Array.from(new URLSearchParams(str));
return (values.length > 0 && values[0][0] !== str);
}
/**
* Check valid JSON string format.
*
* @param {String} str
* JSON string.
*
* @return {Boolean}
*/
static isJson(str) {
let data;
try {
data = JSON.parse(str);
} catch (err) {
return false;
}
return (Array.isArray(data) || typeof data === 'object');
}
};
module.exports = RouterRequest;
</code></pre></article></section></div></div></div><div class="search-container" id="PkfLWpAbet" style="display:none"><div class="wrapper" id="iCxFxjkHbP"><button class="icon-button search-close-button" id="VjLlGakifb" aria-label="close search"><svg><use xlink:href="#close-icon"></use></svg></button><div class="search-box-c"><svg><use xlink:href="#search-icon"></use></svg> <input type="text" id="vpcKVYIppa" class="search-input" placeholder="Search..." autofocus></div><div class="search-result-c" id="fWwVHRuDuN"><span class="search-result-c-text">Type anything to view search result</span></div></div></div><div class="mobile-menu-icon-container"><button class="icon-button" id="mobile-menu" data-isopen="false" aria-label="menu"><svg><use xlink:href="#menu-icon"></use></svg></button></div><div id="mobile-sidebar" class="mobile-sidebar-container"><div class="mobile-sidebar-wrapper"><div class="mobile-nav-links"></div><div class="mobile-sidebar-items-c"><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-modules"><div>Modules</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="module-router_Route.html">router/Route</a></div><div class="sidebar-section-children"><a href="module-router_Utils.html">router/Utils</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-classes"><div>Classes</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="Router.html">Router</a></div><div class="sidebar-section-children"><a href="RouterRequest.html">RouterRequest</a></div><div class="sidebar-section-children"><a href="RouterResponse.html">RouterResponse</a></div><div class="sidebar-section-children"><a href="RouterStack.html">RouterStack</a></div></div><div class="sidebar-section-title with-arrow" data-isopen="false" id="sidebar-global"><div>Global</div><svg><use xlink:href="#down-icon"></use></svg></div><div class="sidebar-section-children-container"><div class="sidebar-section-children"><a href="global.html#getRoutes">getRoutes</a></div><div class="sidebar-section-children"><a href="global.html#loadRoutes">loadRoutes</a></div></div></div><div class="mobile-navbar-actions"><div class="navbar-right-item"><button class="icon-button search-button" aria-label="open-search"><svg><use xlink:href="#search-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button theme-toggle" aria-label="toggle-theme"><svg><use class="theme-svg-use" xlink:href="#light-theme-icon"></use></svg></button></div><div class="navbar-right-item"><button class="icon-button font-size" aria-label="change-font-size"><svg><use xlink:href="#font-size-icon"></use></svg></button></div></div></div></div><script type="text/javascript" src="scripts/core.min.js"></script><script src="scripts/search.min.js" defer="defer"></script><script src="scripts/third-party/fuse.js" defer="defer"></script><script type="text/javascript">var tocbotInstance=tocbot.init({tocSelector:"#eed4d2a0bfd64539bb9df78095dec881",contentSelector:".main-content",headingSelector:"h1, h2, h3",hasInnerContainers:!0,scrollContainer:".main-content",headingsOffset:130,onClick:bringLinkToView})</script></body></html>