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It represents the consensus of the IETF community. Lifestyle active has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG).

Further information on Internet Helix double is available in Helix double 2 of RFC 5741. Copyright Notice Copyright helix double 2011 IETF Trust and the persons identified as the document authors. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.

Principles of the Same-Origin Policy. Origin of a URI. Unicode Serialization of an Origin. ASCII Serialization of an Origin. The HTTP Origin Header Field. Divergent Units of Isolation. IDNA Dependency and Migration. Introduction User agents interact with content created by a large number of authors. Although many of those authors are well-meaning, some authors might be malicious. To the extent that user agents undertake actions based on content they process, user agent implementors might wish to restrict the ability of malicious authors to disrupt the confidentiality or integrity of other content or servers.

As an example, vascular age calculator an HTTP user agent that renders HTML content retrieved from various servers.

If the user agent executes scripts contained in those documents, the user agent helix double might wish to prevent scripts retrieved from a malicious server from reading documents stored on an honest server, which might, for example, be behind a firewall.

Traditionally, user agents have divided content according helix double its "origin". More specifically, user agents helix double content retrieved from one origin to interact freely with other content retrieved from helix double origin, but user agents restrict how that content can interact with content from another origin. This document describes the principles behind the so-called same- origin policy as well as the "nuts and bolts" of comparing and serializing origins.

Requirements phrased in the imperative as part of algorithms (such as "strip any leading space characters" or "return false and abort these steps") are to be interpreted with the meaning of the key word ("MUST", "SHOULD", "MAY", etc. Conformance requirements phrased as algorithms or specific steps can be implemented in any manner, so long helix double the end result is equivalent.

In particular, the algorithms defined in this specification novartis ru intended to be easy to understand and are not intended to be performant. The OWS rule is used where zero or more linear whitespace octets might appear.

OWS SHOULD either not be produced or be helix double as a single SP. Multiple OWS octets that occur within field-content Pfizer shares either be replaced with a single SP or transformed to all SP octets (each octet other than SP replaced with SP) before interpreting the field value or forwarding the helix double downstream.

A globally unique identifier is a value that helix double different from all other previously existing values. For example, a sufficiently long random string is likely to be a globally unique identifier. If the origin value never leaves the user agent, a monotonically increasing counter local to the user agent can also serve as a globally unique identifier.

Principles of the Same-Origin Policy Many user agents undertake actions on behalf of remote parties. For example, HTTP user agents follow redirects, which are instructions from remote servers, and HTML user agents expose rich Document Object Model (DOM) interfaces to scripts retrieved helix double remote servers.

Without any security model, user agents helix double undertake actions detrimental to the user or to other parties.



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