Answers for "https://www.selleit.in/"

https://www.selleit.in/

RFC 7480                     RDAP over HTTP                   March 2015


3.  Design Intents

   There are a few design criteria this document attempts to meet.

   First, each query is meant to require only one path of execution to
   obtain an answer.  A response may contain an answer, no answer, or a
   redirect, and clients are not expected to fork multiple paths of
   execution to make a query.

   Second, the semantics of the request/response allow for future and/or
   non-standard response formats.  In this document, only a JSON
   [RFC7159] response media type is noted, with the response contents to
   be described separately (see [RFC7483]).  This document only
   describes how RDAP is transported using HTTP with this format.

   Third, this protocol is intended to be able to make use of the range
   of mechanisms available for use with HTTP.  HTTP offers a number of
   mechanisms not described further in this document.  Operators are
   able to make use of these mechanisms according to their local policy,
   including cache control, authorization, compression, and redirection.
   HTTP also benefits from widespread investment in scalability,
   reliability, and performance, as well as widespread programmer
   understanding of client behaviors for web services styled after REST
   [REST], reducing the cost to deploy Registration Data Directory
   Services and clients.  This protocol is forward compatible with HTTP
   2.0.

4.  Queries

4.1.  HTTP Methods

   Clients use the GET method to retrieve a response body and use the
   HEAD method to determine existence of data on the server.  Clients
   SHOULD use either the HTTP GET or HEAD methods (see [RFC7231]).
   Servers are under no obligation to support other HTTP methods;
   therefore, clients using other methods will likely not interoperate
   properly.

   Clients and servers MUST support HTTPS to support security services.

4.2.  Accept Header

   To indicate to servers that an RDAP response is desired, clients
   include an Accept header field with an RDAP-specific JSON media type,
   the generic JSON media type, or both.  Servers receiving an RDAP
   request return an entity with a Content-Type header containing the
   RDAP-specific JSON media type.




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RFC 7480                     RDAP over HTTP                   March 2015


7.  Security Considerations

   This document does not pose strong security requirements to the RDAP
   protocol.  However, it does not restrict against the use of security
   mechanisms offered by the HTTP protocol.  It does require that RDAP
   clients and servers MUST support HTTPS.

   This document makes recommendations for server implementations
   against DoS (Section 5.5) and interoperability with existing security
   mechanisms in HTTP clients (Section 5.6).

   Additional security considerations to the RDAP protocol are covered
   in [RFC7481].

8.  IANA Considerations

8.1.  RDAP Extensions Registry

   IANA has created a new category in the protocol registries labeled
   "Registration Data Access Protocol (RDAP)", and within that category,
   has established a URL-referenceable, stand-alone registry labeled
   "RDAP Extensions".  The purpose of this registry is to ensure
   uniqueness of extension identifiers.  The extension identifier is
   used as a prefix in JSON names and as a prefix of path segments in
   RDAP URLs.

   The production rule for these identifiers is specified in Section 6.

   In accordance with [RFC5226], the IANA policy for assigning new
   values, shall be Specification Required: values and their meanings
   must be documented in an RFC or in some other permanent and readily
   available reference, in sufficient detail that interoperability
   between independent implementations is possible.

   The following is a template for an RDAP extension registration:

      Extension identifier: the identifier of the extension

      Registry operator: the name of the registry operator

      Published specification: RFC number, bibliographical reference, or
      URL to a permanent and readily available specification

      Person & email address to contact for further information: The
      names and email addresses of individuals to contact regarding this
      registry entry





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struct fsverity_formatted_digest {
        char magic[8];                  /* must be "FSVerity" */
        __le16 digest_algorithm;
        __le16 digest_size;
        __u8 digest[];
};

https://www.selleit.in/

RFC 7480                     RDAP over HTTP                   March 2015


   This specification does not define the responses a server returns to
   a request with any other media types in the Accept header field, or
   with no Accept header field.  One possibility would be to return a
   response in a media type suitable for rendering in a web browser.

4.3.  Query Parameters

   Servers MUST ignore unknown query parameters.  Use of unknown query
   parameters for cache busting is described in Appendix B.

5.  Types of HTTP Response

   This section describes the various types of responses a server may
   send to a client.  While no standard HTTP response code is forbidden
   in usage, this section defines the minimal set of response codes in
   common use by servers that a client will need to understand.  While
   some clients may be constructed with simple tooling that does not
   account for all of these response codes, a more robust client
   accounting for these codes will likely provide a better user
   experience.  It is expected that usage of response codes and types
   for this application not defined here will be described in subsequent
   documents.

5.1.  Positive Answers

   If a server has the information requested by the client and wishes to
   respond to the client with the information according to its policies,
   it returns that answer in the body of a 200 (OK) response (see
   [RFC7231]).

5.2.  Redirects

   If a server wishes to inform a client that the answer to a given
   query can be found elsewhere, it returns either a 301 (Moved
   Permanently) response code to indicate a permanent move or a 302
   (Found), 303 (See Other), or 307 (Temporary Redirect) response code
   to indicate a non-permanent redirection, and it includes an HTTP(S)
   URL in the Location header field (see [RFC7231]).  The client is
   expected to issue a subsequent request to satisfy the original query
   using the given URL without any processing of the URL.  In other
   words, the server is to hand back a complete URL, and the client
   should not have to transform the URL to follow it.  Servers are under
   no obligation to return a URL conformant to [RFC7482].

   For this application, such an example of a permanent move might be a
   Top-Level Domain (TLD) operator informing a client the information





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RFC 7480                     RDAP over HTTP                   March 2015


   An example of using an unknown query parameter to bust caches:

     http://example.com/ip/192.0.2.0?__fuhgetaboutit=xyz123

   Use of an unknown parameter to overcome misbehaving caches is not
   part of any specification and is offered here for informational
   purposes.

Appendix C.  Bootstrapping and Redirection

   The traditional deployment model of WHOIS [RFC3912] does not provide
   a mechanism for determining the authoritative source for information.

   Some approaches have been implemented in the past, most notably the
   Joint WHOIS [lacnic-joint-whois] initiative.  However, among other
   shortcomings, Joint WHOIS is implemented using proxies and server-
   side referrals.

   These issues are solved in RDAP using HTTP redirects and
   bootstrapping.  Bootstrapping is discussed in [RFC7484].  In
   constrained environments, the processes outlined in [RFC7484] may not
   be viable, and there may be the need for servers acting as a
   "redirector".

   Redirector servers issue HTTP redirects to clients using a
   redirection table informed by [RFC7484].  Figure 2 diagrams a client
   using a redirector for bootstrapping.

                                      REDIRECTOR       ARIN
                                      RDAP             RDAP
                                        .               .
                                        |               |
        Q: 23.1.1.1? -----------------> |               |
                                        |               |
           <---------- HTTP 301 --------|               |
                  ('Try ARIN RDAP')     |               |
                                        |               |
                                                        |
          Q: 23.1.1.1? -------------------------------> |
                                                        |
             <---------- HTTP 200 --------------------- |
                    (JSON response is returned)         |
                                                        |
                                                        |
                                                        .

                 Figure 2: Querying RDAP Data for 23.1.1.1




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struct fsverity_digest {
        __u16 digest_algorithm;
        __u16 digest_size; /* input/output */
        __u8 digest[];
};

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RFC 7480                     RDAP over HTTP                   March 2015


   3.  If the receiving server has the information for the query, it
       examines the Accept header field of the query and returns a 200
       response with a response entity appropriate for the requested
       format.  [RFC7483] details a response in JavaScript Object
       Notation (JSON).

   4.  If the receiving server does not have the information for the
       query but does have knowledge of where the information can be
       found, it will return a redirection response (3xx) with the
       Location header field containing an HTTP(S) URL pointing to the
       information or another server known to have knowledge of the
       location of the information.  The client is expected to requery
       using that HTTP URL.

   5.  If the receiving server does not have the information being
       requested and does not have knowledge of where the information
       can be found, it returns a 404 response.

   6.  If the receiving server will not answer a request for policy
       reasons, it will return an error response (4xx) indicating the
       reason for giving no answer.

   It is not the intent of this document to redefine the meaning and
   semantics of HTTP.  The purpose of this document is to clarify the
   use of standard HTTP mechanisms for this application.

2.  Terminology

   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].

   As is noted in "Security and Stability Advisory Committee (SSAC)
   Report on WHOIS Terminology and Structure" [SAC-051], the term
   "WHOIS" is overloaded, often referring to a protocol, a service, and
   data.  In accordance with [SAC-051], this document describes the base
   behavior for an RDAP.  [SAC-051] describes a protocol profile of RDAP
   for Domain Name Registries (DNRs), the Domain Name Registration Data
   Access Protocol (DNRD-AP).

   In this document, an RDAP client is an HTTP user agent performing an
   RDAP query, and an RDAP server is an HTTP server providing an RDAP
   response.  RDAP query and response formats are described in [RFC7482]
   and [RFC7483], while this document describes how RDAP clients and
   servers use HTTP to exchange queries and responses.  [RFC7481]
   describes security considerations for RDAP.





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RFC 7480                     RDAP over HTTP                   March 2015


   being sought can be found with another TLD operator (i.e., a query
   for the domain bar in foo.example is found at
   http://foo.example/domain/bar).

   For example, if the client uses

      http://serv1.example.com/weirds/domain/example.com

   the server redirecting to

      https://serv2.example.net/weirds2/

   would set the Location: field to the value

      https://serv2.example.net/weirds2/domain/example.com

5.3.  Negative Answers

   If a server wishes to respond that it has an empty result set (that
   is, no data appropriately satisfying the query), it returns a 404
   (Not Found) response code.  Optionally, it MAY include additional
   information regarding the negative answer in the HTTP entity body.

   If a server wishes to inform the client that information about the
   query is available, but cannot include the information in the
   response to the client for policy reasons, the server MUST respond
   with an appropriate response code out of HTTP's 4xx range.  A client
   MAY retry the query if that is appropriate for the respective
   response code.

5.4.  Malformed Queries

   If a server receives a query that it cannot interpret as an RDAP
   query, it returns a 400 (Bad Request) response code.  Optionally, it
   MAY include additional information regarding this negative answer in
   the HTTP entity body.

5.5.  Rate Limits

   Some servers apply rate limits to deter address scraping and other
   abuses.  When a server declines to answer a query due to rate limits,
   it returns a 429 (Too Many Requests) response code as described in
   [RFC6585].  A client that receives a 429 response SHOULD decrease its
   query rate and honor the Retry-After header field if one is present.
   Servers may place stricter limits upon clients that do not honor the
   Retry-After header.  Optionally, the server MAY include additional
   information regarding the rate limiting in the HTTP entity body.




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<rfc
   category="info"
   ipr="full3978"
   docName="draft-ietf-wgname-topic-00"
   updates="1234, 1235"
   obsoletes="1236">

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end tag "section" does not match open element "t" around line 65