Multiple ALTO Resources Query Using Multipart Message
draft-zhang-alto-multipart-02

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ALTO WG                                                         J. Zhang
Internet-Draft                                         Tongji University
Intended status: Standards Track                          March 25, 2019
Expires: September 26, 2019

         Multiple ALTO Resources Query Using Multipart Message
                     draft-zhang-alto-multipart-02

Abstract

   Many ALTO use cases involve multiple ALTO information resources like
   different network maps, cost maps and property maps to achieve their
   own specific goals.  To make the ALTO client query them one by one is
   not only inefficient but also error-prone.  The inconsistent
   responses can be performed because of the unstable communication
   environment, and finally conduct the unexpected traffic optimization.
   Further more, some ALTO information resources may have correlation,
   which means one's input parameters may depends on another one's
   response.  To address those issues, some advanced query schema is
   required.  This document proposes an ALTO extension to support the
   multiple ALTO resources query in the single request using the HTTP
   multipart message and the existing JSON query languages.

Requirements Language

   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].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   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."

   This Internet-Draft will expire on September 26, 2019.

Zhang                  Expires September 26, 2019               [Page 1]
Internet-Draft                  Multipart                     March 2019

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminologies . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Resource Query Entry  . . . . . . . . . . . . . . . . . .   4
     2.2.  Resource Response Entry . . . . . . . . . . . . . . . . .   4
     2.3.  Resource Response Entry Body  . . . . . . . . . . . . . .   4
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Simple Batch Query  . . . . . . . . . . . . . . . . . . .   4
     3.2.  Properties Constrained Query  . . . . . . . . . . . . . .   5
     3.3.  Path Vector Query . . . . . . . . . . . . . . . . . . . .   5
   4.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Design Space of Multipart Resource in ALTO  . . . . . . . . .   6
   6.  Multipart Query Resource  . . . . . . . . . . . . . . . . . .   7
     6.1.  Media Type  . . . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  HTTP Method . . . . . . . . . . . . . . . . . . . . . . .   7
     6.3.  Capabilities  . . . . . . . . . . . . . . . . . . . . . .   7
     6.4.  Accept Input Parameters . . . . . . . . . . . . . . . . .   7
     6.5.  Uses  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     6.6.  Response  . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Protocol Errors . . . . . . . . . . . . . . . . . . . . . . .   8
     7.1.  Partial Error . . . . . . . . . . . . . . . . . . . . . .   8
     7.2.  Entire Error  . . . . . . . . . . . . . . . . . . . . . .   9
   8.  Incremental Update Integration  . . . . . . . . . . . . . . .   9
   9.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  IRD Example . . . . . . . . . . . . . . . . . . . . . . .  10
     9.2.  Example 1: Simple Batch Query . . . . . . . . . . . . . .  12
     9.3.  Example 2: Properties Constrained Query . . . . . . . . .  13
     9.4.  Example 3: Path Vector Query  . . . . . . . . . . . . . .  16
   10. Compatibility . . . . . . . . . . . . . . . . . . . . . . . .  17