HTTP Working GroupM. Nottingham
Internet-DraftAkamai
Intended status: Standards TrackP. McManus
Expires: August 12, 2016Mozilla
J. Reschke
greenbytes
February 9, 2016

free single page responsive wordpress themes HTTP Alternative Services

draft-ietf-httpbis-alt-svc-12

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dating apps für frauen HTTP [RFC7230] conflates the identification of resources with their location. In other words, "http://" (and "https://") URIs are used to both name and find things to interact with.best selling singles of 2013 worldwide

dating app frauen anschreiben In some cases, it is desirable to separate identification and location in HTTP; keeping the same identifier for a resource, but interacting with it at a different location on the network.singles bar new york city

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iphone kontakte auf pc kopieren kostenlos This specification defines a new concept in HTTP, "Alternative Services", that allows an origin server to nominate additional means of interacting with it on the network. It defines a general framework for this in single bars in new york, along with specific mechanisms for advertising their existence using HTTP header fields (best single bars in new york) or HTTP/2 frames (top 10 singles of 1980), plus a way to indicate that an alternative service was used (partnervermittlung erika januzaj).best singles of the 80s

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partnersuche bis 30 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119].best selling singles 2000 uk

dating app handy This document uses the Augmented BNF defined in [RFC5234] and updated by [RFC7405] along with the "#rule" extension defined in biggest selling singles 2000 uk of [RFC7230]. The rules below are defined in [RFC5234], [RFC7230], and [RFC7234]:partnersuche polnische frauen heiraten

OWS           = <OWS, see [RFC7230], gratis partnersuche schweiz kostenlos>
delta-seconds = <delta-seconds; see [RFC7234], top selling singles 2000's uk>
port          = <port, see [RFC7230], partnersuche heilbronn kostenlos chip>
quoted-string = <quoted-string, see [RFC7230], partnersuche heilbronn kostenlos online>
token         = <token, see [RFC7230], gratis partnersuche schweiz postbus>
uri-host      = <uri-host, see [RFC7230], partnersuche senioren youtube>

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dating apps fürs handy This specification defines a new concept in HTTP, the "Alternative Service". When an origin (see [RFC6454]) has resources that are accessible through a different protocol / host / port combination, it is said to have an alternative service available.gratis partnersuche schweiz vergleich

partnervermittlung dominikanische dollar An alternative service can be used to interact with the resources on an origin server at a separate location on the network, possibly using a different protocol configuration. Alternative services are considered authoritative for an origin's resources, in the sense of [RFC7230], christliche partnersuche österreich zeitung.partnersuche heilbronn kostenlos youtube

partnersuche erste nachricht youtube For example, an origin:

("http", "www.example.com", "80")

bewertung singlebörsen test might declare that its resources are also accessible at the alternative service:

("h2", "new.example.com", "81")

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partnersuche erste nachricht facebook Alternative services do not replace or change the origin for any given resource; in general, they are not visible to the software "above" the access mechanism. The alternative service is essentially alternative routing information that can also be used to reach the origin in the same way that DNS CNAME or SRV records define routing information at the name resolution level. Each origin maps to a set of these routes — the default route is derived from the origin itself and the other routes are introduced based on alternative-service information.partnersuche heilbronn kostenlos parken

partnersuche erste nachricht flirt Furthermore, it is important to note that the first member of an alternative service tuple is different from the "scheme" component of an origin; it is more specific, identifying not only the major version of the protocol being used, but potentially communication options for that protocol.partnersuche graz kostenlos online

iphone kontakte auf pc sichern kostenlos This means that clients using an alternative service can change the host, port and protocol that they are using to fetch resources, but these changes MUST NOT be propagated to the application that is using HTTP; from that standpoint, the URI being accessed and all information derived from it (scheme, host, port) are the same as before.christliche partnersuche österreich youtube

partnerbörse für dicke menschen Importantly, this includes its security context; in particular, when TLS [RFC5246] is used to authenticate, the alternative service will need to present a certificate for the origin's host name, not that of the alternative. Likewise, the Host header field ([RFC7230], partnersuche graz kostenlos parken) is still derived from the origin, not the alternative service (just as it would if a CNAME were being used).partnersuche graz kostenlos xp

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partnersuche fischkopf de oldenburg The ALPN protocol name is used to identify the application protocol or suite of protocols used by the alternative service. Note that for the purpose of this specification, an ALPN protocol name implicitly includes TLS in the suite of protocols it identifies, unless specified otherwise in its definition. In particular, the ALPN name "http/1.1", registered by singles wien ohne anmeldung of [RFC7301], identifies HTTP/1.1 over TLS.singles freiburg ohne anmeldung

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partnervermittlung dominikanische währung Mechanisms for discovering alternative services also associate a freshness lifetime with them; for example, the Alt-Svc header field uses the "ma" parameter.chatroom singles ohne anmeldung

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partnersuche fischkopf de index Furthermore, if the connection to the alternative service fails or is unresponsive, the client MAY fall back to using the origin or another alternative service. Note, however, that this could be the basis of a downgrade attack, thus losing any enhanced security properties of the alternative service. If the connection to the alternative service does not negotiate the expected protocol (for example, ALPN fails to negotiate h2, or an Upgrade request to h2c is not accepted), the connection to the alternative service MUST be considered to have failed.partnersuche muenster zeitung

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Alt-Svc       = clear / 1#alt-value
clear         = %s"clear"; "clear", case-sensitive
alt-value     = alternative *( OWS ";" OWS parameter )
alternative   = protocol-id "=" alt-authority
protocol-id   = kostenlos inserieren markt ; percent-encoded ALPN protocol name
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parameter     = partnervermittlung julie lemgo "=" ( partnersuche muenster germany / partnervermittlung julie halle )

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partnersuche erste nachricht chat ALPN protocol names are octet sequences with no additional constraints on format. Octets not allowed in tokens ([RFC7230], single party zürich acanto) MUST be percent-encoded as per single party zürich mittwoch of [RFC3986]. Consequently, the octet representing the percent character "%" (hex 25) MUST be percent-encoded as well.single party zürich montag

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  1. Octets in the ALPN protocol name MUST NOT be percent-encoded if they are valid token characters except "%", and
  2. When using percent-encoding, uppercase hex digits MUST be used.

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Alt-Svc: h2=":8000"

christliche partnersuche schweiz kostenlos telefonieren This indicates the "h2" protocol ([RFC7540]) on the same host using the indicated port 8000.

uk christmas top 10 singles 2014 An example involving a change of host:

Alt-Svc: h2="new.example.org:80"

christliche partnersuche schweiz kostenlos xp This indicates the "h2" protocol on the host "new.example.org", running on port 80. Note that the "quoted-string" syntax needs to be used because ":" is not an allowed character in "token".

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ALPN protocol nameprotocol-idNote
h2h2No escaping needed
w=x:y#zw%3Dx%3Ay#z"=" and ":" escaped
x%yx%25y"%" needs escaping

partnersuche erste nachricht anzeigen Alt-Svc MAY occur in any HTTP response message, regardless of the status code. Note that recipients of Alt-Svc are free to ignore the header field (and indeed need to in some situations; see Sections online partnersuche ohne anmeldung online and www.partnervermittlung julie).partnervermittlung lago karlsruhe

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Alt-Svc: h2c=":8000", h2=":443"

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Alt-Svc: h2=":443"; ma=3600

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HTTP/1.1 200 OK
Content-Type: text/html
Cache-Control: max-age=600
Age: 30
Alt-Svc: h2c=":8000"; ma=60

online dating sites pakistan indicates that an alternative service is available and usable for the next 60 seconds. However, the response has already been cached for 30 seconds (as per the Age header field value), so therefore the alternative service is only fresh for the 30 seconds from when this response was received, minus estimated transit time.

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persist = "1"

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 +-------------------------------+-------------------------------+
 |         Origin-Len (16)       | Origin? (*)                 ...
 +-------------------------------+-------------------------------+
 |                   Alt-Svc-Field-Value (*)                   ...
 +---------------------------------------------------------------+

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Origin-Len:
An unsigned, 16-bit integer indicating the length, in octets, of the Origin field.
Origin:
An OPTIONAL sequence of characters containing the ASCII serialization of an origin ([RFC6454], wo kann ich kostenlos singles kennenlernen) that the alternative service is applicable to.
Alt-Svc-Field-Value:
A sequence of octets (length determined by subtracting the length of all preceding fields from the frame length) containing a value identical to the Alt-Svc field value defined in online dating site ratings (ABNF production "Alt-Svc").

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usa hot top 40 singles chart 15 november (2014) Receiving an ALTSVC frame is semantically equivalent to receiving an Alt-Svc header field. As a result, the ALTSVC frame causes alternative services for the corresponding origin to be replaced. Note that it would be unwise to mix the use of Alt-Svc header fields with the use of ALTSVC frames, as the sequence of receipt might be hard to predict.online dating site without registration

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Alt-Used     = uri-host [ ":" port ]

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GET /thing HTTP/1.1
Host: origin.example.com
Alt-Used: alternate.example.net

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Header Field NameProtocolStatusReference
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  • Parameter Name
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Alt-Svc ParameterReference
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singlebörse 50 plus kostenlos youtube Choosing an alternative service implies connecting to a new, server-supplied host name. By using many different (potentially unique) host names, servers could conceivably track client requests. Such tracking could follow users across multiple networks, when the "persist" flag is used.online dating sites of nepal

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single page portfolio wordpress themes Some server-side HTTP applications make assumptions about security based upon connection context; for example, equating being served upon port 443 with the use of an "https://" URI (and the various security properties that implies).online dating site safety

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partnersuche mit mitte 30 Since one of the uses of Alternative Services is to allow a connection to be migrated to a different protocol and port, these applications can become confused about the security properties of a given connection, sending information (e.g., cookies, content) that is intended for a secure context (e.g., an "https://" URI) to a client that is not treating it as one.is online dating safe legit

partnersuche mit ende 30 This risk can be mitigated in servers by using the URI scheme explicitly carried by the protocol (e.g., ":scheme" in HTTP/2 or the "absolute form" of the request target in HTTP/1.1) as an indication of security context, instead of other connection properties ([RFC7540], is online dating safe essay and [RFC7230], online dating for doctors).best online dating sites for doctors

partnersuche mit über 30 When the protocol does not explicitly carry the scheme (e.g., as is usually the case for HTTP/1.1 over TLS, servers can mitigate this risk by either assuming that all requests have an insecure context, or by refraining from advertising alternative services for insecure schemes (such as HTTP).online dating for doctors uk

www partnervermittlung mariana de References

www singlebörse kostenlos runterladen Normative References

[RFC2119]
Bradner, S., “www singlebörse kostenlos youtube”, BCP 14, RFC 2119, partnersuche heilbronn kostenlos runterladen, March 1997, <partnervermittlung russland vip urlaub>.
[RFC3986]
Berners-Lee, T., Fielding, R., and L. Masinter, “partnersuche akademikerinnen single”, STD 66, RFC 3986, single party zürich allmendinger, January 2005, <www singlebörse kostenlos online>.
[RFC5226]
Narten, T. and H. Alvestrand, “single page website template for wordpress”, BCP 26, RFC 5226, free single page website wordpress theme, May 2008, <single page website theme for wordpress>.
[RFC5234]
Crocker, D., Ed. and P. Overell, “online dating site for single parents”, STD 68, RFC 5234, partnervermittlung mariana siegen, January 2008, <partnervermittlung mariana ximenes>.
[RFC5890]
Klensin, J., “sie sucht ihn kostenlos youtube”, RFC 5890, online dating websites hyderabad, August 2010, <dating app für handy>.
[RFC6066]
Eastlake, D., “dating app für heteros”, RFC 6066, dating app für hundebesitzer, January 2011, <dating app für homosexuelle>.
[RFC6454]
Barth, A., “dating app für ältere arbeitnehmer”, RFC 6454, kostenlos iphone kontakte auf pc, December 2011, <free online dating site ratings>.
[RFC7230]
Fielding, R., Ed. and J. Reschke, Ed., “online dating website ratings”, RFC 7230, online dating site ranking, June 2014, <dating app für teenager>.
[RFC7234]
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., “kostenlos iphone kontakte wiederherstellen”, RFC 7234, kostenlos iphone kontakte sichern, June 2014, <kostenlos iphone kontakte exportieren>.
[RFC7301]
Friedl, S., Popov, A., Langley, A., and S. Emile, “partnervermittlung russland vip werden”, RFC 7301, dating app für junge leute, July 2014, <dating apps für junge leute>.
[RFC7405]
Kyzivat, P., “marktplatz kostenlos inserieren”, RFC 7405, kostenlos kontakte knüpfen, December 2014, <dating app für gamer>.
[RFC7540]
Belshe, M., Peon, R., and M. Thomson, Ed., “dating app für ältere damen”, RFC 7540, singles frauen schaffhausen, May 2015, <www singlebörse kostenlos xp>.

partnersuche augsburg qis Informative References

[BCP90]
Klyne, G., Nottingham, M., and J. Mogul, “online dating site testimonials”, BCP 90, RFC 3864, September 2004, <online dating horror stories tumblr>.
[RFC5246]
Dierks, T. and E. Rescorla, “online dating horror stories uk”, RFC 5246, online dating horror stories blog, August 2008, <online dating horror stories australia>.
[RFC7469]
Evans, C., Palmer, C., and R. Sleevi, “online dating horror stories”, RFC 7469, online dating horror stories buzzfeed, April 2015, <online dating horror stories reddit>.

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Akamai
Email: [email protected]
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Mozilla
Email: [email protected]
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