Edge Side Includes or ESI is a small markup language for edge level dynamic web content ESI is implemented by some content delivery networks, such as Akamai, and by some caching proxy servers such as Varnish, Squid and Mongrel . A dockerized version of Akamai’s Edge Side Includes Test Server (ETS). – akamai /esi-test-server-docker. ESI is currently supported by Content Delivery Networks: Akamai, Fastly, CloudFlare and caching proxy servers – Varnish, Squid and Mongrel.

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The purpose of ESI is to tackle the problem of web infrastructure scaling. Edge Architecture Specification This document defines the Edge Akamau, which extends the web infrastructure through the use of HTTP surrogates – intermediaries that act on akmai of an origin server.

Shows the ESI source code. The main alternatives to ESI are: This specification defines the ESI Invalidation Protocol that allows for tight coherence between origin serves and surrogates also known as “Reverse Proxies”. ESI Language Specification 1. Tom Leighton Pamela J.

By providing a URL to your website or to your test server, you can generate a comprehensive debugging report.

By assembling dynamic pages from individual page fragments only non- cacheable or expired fragments need to be fetched from the origin location, thereby lowering the need to akakai complete pages. The document contains no ESI tags.

This operation provides a debugging report on the ESI code of your source page and all pages that the source page references. The proposal editor was Mark Nottingham.


By using this site, you agree to the Terms of Use and Privacy Policy. For testing purposes, you can set up a test origin server to debug websites before deployment or modification. This allows different caching times for different parts of the page, or different degrees of personalization.

The W3C has acknowledged receipt, but has not accepted the proposal. This specification defines ESI 1. Hesse Tom Killalea Jonathan F.

Edge Side Includes | Customer Support | Akamai

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The XML based ESI tags indicate to the edge-side processing agent the action that needs to be taken to complete the page’s assembly.

ESI leverages client tools such as caches to improve end-user performance, reduce processing overhead on the origin wkamai, and enhance availability. This page was last edited on 22 Septemberat These tokens appear as custom hostnames that look like this: Tom Leighton Rick M.

Reports information, warning, and error messages about ESI processing. It could be because of changing content like catalogs or forums, or because of personalization.

To diagnose many common problems Akamai customers experience when delivering eis to their end users, see also The Diagnostic Tools API. It is fairly common for websites to have generated content.

Edge Side Includes

Getting started To configure this API for the first time: GlobalDots helps companies to evaluate, purchase, and integrate cloud services by acting as a neutral consultancy layer between vendors and customers with a keen focus on optimizing performance, workflows, and costs.

A debugging report on akamaj ESI code of a source page and all included pages. Akamai also adds additional features to the version they support.


Reports all ESI-supported environment variables and their values. Alternatively the whole page with the ESI tags may be cached, and only the ESI requests may be akamsi to the origin server.

ESI Debugger API v1 – Akamai Documentation | Akamai Developer

Example akzmai an ESI element is the include tag which is used to include content external to the page. Email Us Email Us??? As a result, ESI enables companies to develop web applications once and choose at deployment time where the web application should be assembled – on the content management system, the application server, or the content delivery network, thus reducing complexity, development time and deployment costs.

Scripting languages Proxy servers. It also includes an optional errors array that lists potentially more than one problem detected in the request.

This sample shows an incorrect input error, where the type value defines the type of problem, and the instance may be useful if you need to communicate akmaai the problem with your Akamai support representative: An ESI debugging report consists of the following subsections: Member is required in requests, or always present in responses, even if its value is empty or null. The test origin server where the edge server sends requests instead of the origin server.

ESI provides a mechanism for managing online content transparently across application server solutions, content management systems and content delivery networks.