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CORS Essentials.
Share code and assets across domains in Web applications with CORSAbout This Book* A step-by-step guide but at a high level/fast pace. Not all steps are covered as a basic knowledge is assumed* Provides a basic overview of the concepts but the focus is on providing the practical skills required to d...
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Packt Publishing,
2017.
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| Temas: | |
| Acceso en línea: | Texto completo |
MARC
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| 100 | 1 | |a Gunasundaram, Rajesh. | |
| 245 | 1 | 0 | |a CORS Essentials. |
| 260 | |b Packt Publishing, |c 2017. | ||
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| 505 | 0 | |a Cover; Copyright; Credits; About the Authors; www.PacktPub.com; Customer Feedback; Table of Contents; Preface; Chapter 1: Why You Need CORS; The same-origin policy; Considering the origin of entities; Internet Explorer exception policy; Commonly allowed cross-origin resource sharing; DOM elements allowed for cross-origin sharing; Allowing cross-origin sharing in WebSockets; Limited cross-origin JavaScript API access; Permissions required by JavaScript; JavaScript data storage access is strictly limited by origin; How CORS works -- the header and the request; The CORS header. | |
| 505 | 8 | |a Example 1 -- CORS request with JavaScriptPassing a request to a utility function; Example 2: the CORS transaction to retrieve the title tag; Distributing DOM elements to multiple domains; Putting it all together; Securing when all domains are whitelisted; Methods to add security when a CORS header whitelists all domains; Simple CORS request methods; CORS with Preflight; Triggering a preflight by setting a custom header; The preflight request; The preflight response; CORS via jQuery; Known issues with CORS preflight; Preflight in Firefox; Preflight in Chrome; Preflight in Internet Explorer. | |
| 505 | 8 | |a Non-simple CORS request methods and headers require preflightChecking for the withCredentials property; Troubleshooting and debugging CORS; Browser support for crossorigin attribute in the tag; CORS with jQuery; jQuery CORS AJAX plugin; Enabling CORS globally with server configuration; Alternatives to CORS; Example of JSON-P; Using JSON-P -- limitations and risks; Proposed JSON-P validation standard; WebSocket; WebSocket handshakes; WebSocket and cross-domain resource sharing; Risks of using WebSocket for cross-domain resource sharing; The window.postMessage method. | |
| 505 | 8 | |a PostMessage risks and security measuresSummary; Chapter 2: Creating Proxies for CORS; Proxies and the World Wide Web; What is a proxy server?; Reasons to use a proxy; Avoid mixing up protocols; Some API platforms require proxies or CORS; Getting through a local network firewall; Types of proxy server; Creating a proxy server with Google App Engine; Reverse proxy server; Reverse proxy server with Apache VirtualHost and .htaccess; Reverse proxy server in node.js; Summary; Chapter 3: Usability and Security; CORS usability; Browser support for CORS; Detecting AJAX support in the browser. | |
| 505 | 8 | |a Using preflight for non-simple CORS requestsThe HTTP request headers; HTTP response headers; Enhancing security in CORS; Limiting access when using the Access-Control-Allow-Origin, * wildcard; Trusting the HTTP_ORIGIN header is not recommended; Requests with credentials; CORS security cheat sheet by OWASP; Summary; Chapter 4: CORS in Popular Content Management Frameworks; Incoming CORS requests; SAAS or self-hosted?; CORS in WordPress; Limited support for CORS in SAAS WordPress.com; Unauthenticated GET requests to WordPress.com; Authenticated requests to WordPress.com. | |
| 520 | 8 | |a Share code and assets across domains in Web applications with CORSAbout This Book* A step-by-step guide but at a high level/fast pace. Not all steps are covered as a basic knowledge is assumed* Provides a basic overview of the concepts but the focus is on providing the practical skills required to develop applications* Focuses on providing practical examplesWho This Book Is ForWeb developers have been limited by the Same Origin Policy and often wish they could spread their application across different domains. You know JavaScript and AJAX, and have run up against the Same Domain Policy, which is limiting your applications. What You Will Learn* Why you need CORS: Bending the Same Origin Policy and basic CORS implementation, headers and XMLHttpRequest* Creating proxies for CORS: Sometimes the header is not enough* Security: vulnerabilities and how to secure your CORS application* CORS implementations in Content Management systems* Learn about CORS in Windows applications* Take CORS on the Cloud* Apply CORS in Node.js* Best practices for CORSIn DetailThis book explains how to use CORS, including specific implementations for platforms such as Drupal, WordPress, IIS Server, ASP.NET, JBoss, Windows Azure, and Salesforce, as well as how to use CORS in the Cloud on Amazon AWS, YouTube, Mulesoft, and others. It examines limitations, security risks, and alternatives to CORS. It explores the W3C Specification and major developer documentation sources about CORS. It attempts to predict what kinds of extension to the CORS specification, or completely new techniques, will come in the future to address the limitations of CORSWeb developers will learn how to share code and assets across domains with CORS. They will learn a variety of techniques that are rather similar in their method and syntax. The book is organized by similar types of framework and application, so it can be used as a reference. Developers will learn about special cases, such as when a proxy is necessary. And they will learn about some alternative techniques that achieve similar goals, and when they may be preferable to using CORSStyle and approachA step-by-step guide filled with real-world applications. | |
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