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OpenAPI Specification

openapi: 3.2.0
info:
  title: SNU S-Space Interface Open Search API
  version: '1.1'
  summary: OpenSearch 1.1 search interface over the SNU Open Repository and Archive.
  description: 'S-Space serves an OpenSearch 1.1 description document at /open-search/description.xml and answers queries at /open-search/ in Atom, RSS 2.0 or HTML. This is a genuine machine-readable search surface on Seoul National University''s own host, and it is the only keyword-search API the institution operates.

    It carries one significant caveat that must not be papered over. Unlike the OAI-PMH endpoints, /open-search/ sits BEHIND the JavaScript interstitial challenge that fronts s-space.snu.ac.kr. A client without a browser receives HTTP 200 and a ~1 KB HTML shell containing a `js-challenge` token, not search results — a textbook soft-200. Real results require replaying that token as a `js-challenge` cookie. Every example in this contract was captured that way. Treat this surface as GATED, not open: the status code says 200, the payload says no.'
  x-generated: '2026-08-19'
  x-method: probed
  x-operator: institution
  x-source: Live probes of https://s-space.snu.ac.kr/open-search/description.xml and /open-search/ (atom, rss) on 2026-08-19, with the js-challenge cookie replayed, plus the OpenSearch 1.1 specification. SNU publishes no OpenAPI for this surface.
  contact:
    name: S-Space Administrator, Seoul National University
    email: s-space@snu.ac.kr
    url: https://s-space.snu.ac.kr/
  license:
    name: Not stated
    identifier: NOASSERTION
servers:
- url: https://s-space.snu.ac.kr
  description: S-Space, Seoul National University.
security:
- jsChallengeCookie: []
tags:
- name: OpenSearch
  description: OpenSearch 1.1 description and query endpoints.
paths:
  /open-search/description.xml:
    get:
      tags:
      - OpenSearch
      operationId: getOpenSearchDescription
      summary: Retrieve the OpenSearch 1.1 description document
      description: Returns the OpenSearchDescription document advertising the query templates. Requires the js-challenge cookie; without it the response is a 200 HTML shell.
      responses:
        '200':
          description: OpenSearch description document.
          content:
            application/opensearchdescription+xml:
              schema:
                type: object
              examples:
                description:
                  summary: Captured live 2026-08-19 with the js-challenge cookie replayed
                  externalValue: ../examples/snu-s-space-opensearch-description-example.xml
            text/html:
              schema:
                type: string
              examples:
                challenge:
                  summary: What a client without JavaScript actually receives — HTTP 200 with a js-challenge shell, no OpenSearch document.
                  value: <!doctype html><html lang="ko">... <div id="jc-data" data-name="js-challenge" data-token="..." data-ttl="1800" ...>
  /open-search/:
    get:
      tags:
      - OpenSearch
      operationId: openSearchQuery
      summary: Search the repository
      description: Keyword search across S-Space items, returning an OpenSearch-annotated Atom or RSS feed. Requires the js-challenge cookie.
      parameters:
      - name: query
        in: query
        required: true
        description: Search terms.
        schema:
          type: string
          examples:
          - climate
      - name: format
        in: query
        required: false
        description: Response syndication format.
        schema:
          type: string
          enum:
          - atom
          - rss
          - html
          default: atom
      - name: start
        in: query
        required: false
        description: Zero-based index of the first result.
        schema:
          type: integer
          minimum: 0
          default: 0
      - name: rpp
        in: query
        required: false
        description: Results per page.
        schema:
          type: integer
          minimum: 1
          default: 10
      - name: scope
        in: query
        required: false
        description: Handle of a community or collection to restrict the search to.
        schema:
          type: string
          examples:
          - 10371/29
      - name: sort_by
        in: query
        required: false
        schema:
          type: string
      - name: order
        in: query
        required: false
        schema:
          type: string
          enum:
          - ASC
          - DESC
      responses:
        '200':
          description: An OpenSearch result feed — or, for a client that did not solve the JS challenge, a 200 HTML challenge shell.
          content:
            application/atom+xml:
              schema:
                type: object
              examples:
                atom:
                  summary: Captured live 2026-08-19 with the js-challenge cookie replayed
                  externalValue: ../examples/snu-s-space-opensearch-atom-example.xml
            application/rss+xml:
              schema:
                type: object
            text/html:
              schema:
                type: string
components:
  securitySchemes:
    jsChallengeCookie:
      type: apiKey
      in: cookie
      name: js-challenge
      description: 'Not authentication. A bot-mitigation interstitial: the first request returns an HTML page carrying a `data-token`, which the client must set as the `js-challenge` cookie (TTL 1800s) before the real response is served. Documented here because a machine client cannot use this surface without it.'