HTTP Working GroupI. Grigorik
Internet-DraftGoogle
Intended status: ExperimentalOctober 13, 2017
Expires: April 16, 2018

heiratswillige frauen thailand HTTP Client Hints

draft-ietf-httpbis-client-hints-latest

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safety tips for online dating sites This specification defines a set of HTTP request header fields, colloquially known as Client Hints, to address this. They are intended to be used as input to proactive content negotiation; just as the Accept header field allows user agents to indicate what formats they prefer, Client Hints allow user agents to indicate device and agent specific preferences.österreich partnersuche gratis

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heiratswillige frauen aus afrika Discussion of this draft takes place on the HTTP working group mailing list ([email protected]), which is archived at online dating manual.partnersuche mit niveau zitate

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heiratswillige frauen aus tschechien Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as “work in progress”.partner finden in der schweiz

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kosten partnerbörsen A Client Hint request header field is a HTTP header field that is used by HTTP clients to indicate configuration data that can be used by the server to select an appropriate response. Each one conveys client preferences that the server can use to adapt and optimize the response.partnersuche ungarn kostenlos youtube

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kosten partnerbörsen vergleich Clients control which Client Hints are sent in requests, based on their default settings, user configuration and/or preferences. Implementers might provide user choice mechanisms so that users may balance privacy concerns with bandwidth limitations. Implementations specific to certain use cases or threat models might avoid transmitting these header fields altogether, or limit them to secure contexts or authenticated sessions. Implementers should be aware that explaining the privacy implications of passive fingerprinting or network information disclosure may be challenging.partnersuche österreich test

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tips for good online dating profile Further, depending on the hint used, the server can generate additional response header fields to convey related values to aid client processing. For example, this specification defines the “Content-DPR” response header field that needs to be returned by the server when the “DPR” hint is used to select the response.online sims dating games free

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  Accept-CH = #field-name

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  Accept-CH: DPR, Width, Viewport-Width

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  Accept-CH-Lifetime = #delta-seconds

dating online gratis italia The field-value indicates that the Accept-CH preference SHOULD be considered stale after its age is greater than the specified number of seconds.the gentleman guide to online dating pdf password

  Accept-CH: DPR, Width
  Accept-CH: Viewport-Width
  Accept-CH-Lifetime: 86400

partnerbörse ohne versteckte kosten For example, based on the Accept-CH and Accept-CH-Lifetime example above, a user agent could persist an origin-wide Accept-CH preference for up to 86400 seconds (1 day). Then, if a request is initiated to the same origin before the preference is stale (e.g. as a result of a navigation to the origin, or fetching a subresource from the origin) the client could append the requested header fields (DPR, Width, and Viewport-Width in this example) to the request and any subresource requests initiated as a result of processing a response from same origin.partnerbörse parship kosten

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online dating site profile examples When selecting an optimized response based on one or more Client Hints, and if the resource is cacheable, the server needs to generate a Vary response header field ([RFC7234]) to indicate which hints can affect the selected response and whether the selected response is appropriate for a later request.singlebörse alleinerziehend kostenlos online

  Vary: DPR

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  Vary: DPR, Width

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partnersuche in villach The “DPR” request header field is a number that indicates the client’s current Device Pixel Ratio (DPR), which is the ratio of physical pixels over CSS px (Section 5.2 of [CSSVAL]) of the layout viewport (Section 9.1.1 of [CSS2]) on the device.kosten der partnerbörsen

  DPR = 1*DIGIT [ "." 1*DIGIT ]

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south africa's biggest dating site The “Content-DPR” response header field is a number that indicates the ratio between physical pixels over CSS px of the selected image response.guide to online dating password

  Content-DPR = 1*DIGIT [ "." 1*DIGIT ]

namibian online dating sites DPR ratio affects the calculation of intrinsic size of image resources on the client - i.e. typically, the client automatically scales the natural size of the image by the DPR ratio to derive its display dimensions. As a result, the server MUST explicitly indicate the DPR of the selected image response whenever the DPR hint is used, and the client MUST use the DPR value returned by the server to perform its calculations. In case the server returned Content-DPR value contradicts previous client-side DPR indication, the server returned value MUST take precedence.guide to online dating

partnervermittlung ungarinnen kennenlernen Note that DPR confirmation is only required for image responses, and the server does not need to confirm the resource width as this value can be derived from the resource itself once it is decoded by the client.online dating sites sri lanka

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  Width = 1*DIGIT

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  Viewport-Width = 1*DIGIT

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  Save-Data = sd-token *( OWS ";" OWS [sd-token] )
  sd-token = token

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  DPR: 2.0
  Width: 320
  Viewport-Width: 320

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  Content-DPR: 1.0

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gratis partnervermittlung österreich zeitung The request header fields defined in this specification expose information that is already available to Web applications in the browser runtime itself (e.g., using JavaScript and CSS). For example, the application can obtain viewport width, image display width, and device pixel ratio via JavaScript, or through the use of CSS media queries and unique resource URLs even if JavaScript is disabled. However, servers that gather this information through such mechanisms are typically observable (e.g., you can see that they’re using JavaScript to gather it), whereas servers’ use of the header fields introduced by this specification is not observable. Section 2.1 discusses potential mitigations.partnervermittlung mainaschaff lauf

online dating kostenlos runterladen For example, sending Client Hints on all requests can make information about the user’s environment available to origins that otherwise did not have access to this data, which may or may not be the desired outcome - e.g. this may enable an image optimization service to deliver a tailored asset, and it may reveal same information about the user to other origins that may not have had access to it before. Similarly, sending highly granular data, such as image and viewport width may help identify users across multiple requests. Restricting such field values to an enumerated range, where the user agent advertises a threshold value that is close but is not an exact representation of the current value, can help mitigate the risk of such fingerprinting.online dating for professionals australia

free singles phone chat numbers Implementers ought to provide mechanisms and policies to control how and when such hints are advertised. For example, they could require origin opt-in via Accept-CH; clear remembered opt-in, as set by Accept-CH-Lifetime, when site data, browsing history, browsing cache, or similar, are cleared; restrict delivery to same origin subrequests; limit delivery to requests that already carry identifying information (e.g. cookies); modify delivery policy when in an “incognito” or a similar privacy mode; enable user configuration and opt in, and so on.online dating for professionals canada

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good morning america online dating tips This document defines the “Accept-CH”, “DPR”, “Save-Data”, “Viewport-Width”, and “Width” HTTP request fields, “Accept-CH”, “Accept-CH-Lifetime”, and “Content-DPR” HTTP response field, and registers them in the Permanent Message Header Fields registry.online dating for professionals

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  • Header field name: Accept-CH
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): online dating for professionals usa of this document
  • Related information: for Client Hints

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  • Header field name: Accept-CH-Lifetime
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): the gentleman's guide to online dating review of this document
  • Related information: for Client Hints

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  • Header field name: Content-DPR
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): online dating local singles of this document
  • Related information: for Client Hints

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  • Header field name: DPR
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): frauen ab 50.ch of this document
  • Related information: for Client Hints

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  • Header field name: Save-Data
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): frauen 50+ suchen mann of this document
  • Related information: for Client Hints

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  • Header field name: Viewport-Width
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): partnersuche hundebesitzer erzgebirge of this document
  • Related information: for Client Hints

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  • Header field name: Width
  • Applicable protocol: HTTP
  • Status: standard
  • Author/Change controller: IETF
  • Specification document(s): heiratswillige frauen aus italien of this document
  • Related information: for Client Hints

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great online dating tips Thanks to Mark Nottingham, Julian Reschke, Chris Bentzel, Yoav Weiss, Ben Greenstein, Tarun Bansal, Roy Fielding, Vasiliy Faronov, Ted Hardie, Jonas Sicking, and numerous other members of the IETF HTTP Working Group for invaluable help and feedback.heiratswillige frauen ukraine

heiratswillige ungarische frauen References

heiratswillige frauen ungarn Normative References

[CSS2]
Bos, B., Celic, T., Hickson, I., and H. Lie, “online dating sri lanka free”, W3C Recommendation REC-CSS2-20110607, June 2011, <heiratswillige frauen mit bild>.
[CSSVAL]
Atkins, T. and E. Etemad, “heiratswillige frauen marokko”, World Wide Web Consortium CR CR-css-values-3-20160929, September 2016, <free online dating sites 13 year olds>.
[HTML5]
Hickson, I., Berjon, R., Faulkner, S., Leithead, T., Navara, E., O&#039;Connor, T., and S. Pfeiffer, “online dating meeting for the first time tips”, World Wide Web Consortium Recommendation REC-html5-20141028, October 2014, <tips for online dating conversation>.
[RFC2119]
Bradner, S., “free online dating sites for guys”, BCP 14, RFC 2119, cx christliche partnersuche gratis, March 1997, <best online dating sim>.
[RFC5234]
Crocker, D., Ed. and P. Overell, “top online dating sim”, STD 68, RFC 5234, best online dating rpg, January 2008, <heiratswillige frauen finden>.
[RFC6454]
Barth, A., “best way to start a conversation with a girl online dating”, RFC 6454, best way to initiate conversation online dating, December 2011, <free singles chat bazaar>.
[RFC7230]
Fielding, R., Ed. and J. Reschke, Ed., “heiratswillige frauen aus estland”, RFC 7230, online dating website tips, June 2014, <top online dating profile examples>.
[RFC7231]
Fielding, R., Ed. and J. Reschke, Ed., “heiratswillige deutsche frauen”, RFC 7231, www.heiratswillige frauen.de, June 2014, <heiratswillige frauen aus der ukraine>.
[RFC7234]
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., “heiratswillige frauen aus dem ausland”, RFC 7234, heiratswillige frauen deutschland, June 2014, <heiratswillige frauen aus der schweiz>.

heiratswillige frauen aus der slowakei Informative References

[KEY]
Fielding, R. and M. Nottingham, “the gentleman's guide to online dating free”, Internet-Draft draft-ietf-httpbis-key-01 (work in progress), March 2016.
[RFC6265]
Barth, A., “single partys zürich”, RFC 6265, partnervermittlung ulm umgebung, April 2011, <heiratswillige frauen aus kuba>.

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tips writing online dating email Client Hints may be combined with Key response header field ([KEY]) to enable fine-grained control of the cache key for improved cache efficiency. For example, the server can return the following set of instructions:heiratswillige frauen kostenlos

  Key: DPR;partition=1.5:2.5:4.0

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  Key: Width;div=320

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  • Issue 168 (make Save-Data extensible) updated ABNF.
  • Issue 163 (CH review feedback) editorial feedback from httpwg list.
  • Issue 153 (NetInfo API citation) added normative reference.

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  • Issue 200: Moved Key reference to informative.
  • Issue 215: Extended passive fingerprinting and mitigation considerations.
  • Changed document status to experimental.

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  • Issue 239: Updated reference to CR-css-values-3
  • Issue 240: Updated reference for Network Information API
  • Issue 241: Consistency in IANA considerations
  • Issue 250: Clarified Accept-CH

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  • Issue 284: Extended guidance for Accept-CH
  • Issue 308: Editorial cleanup
  • Issue 306: Define Accept-CH-Lifetime

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  • Issue 361: Removed Downlink
  • Issue 361: Moved Key to appendix, plus other editorial feedback.

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  • None

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