Class HttpServiceGraphStore

constructor

• new HttpServiceGraphStore(context: any): HttpServiceGraphStore

  Parameters

  • context: any

  Returns HttpServiceGraphStore

Readonlycontext

Static ReadonlyALLOWED_METHODS

Static ReadonlyALLOWED_METHODS_STORE

Static ReadonlyPATH

deleteGraph

• deleteGraph(
      engine: QueryEngineBase,
      graph: NamedNode<string> | DefaultGraph,
  ): Promise<IGraphStoreResult>

  Delete a graph, together with all of its contents.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • graph: NamedNode<string> | DefaultGraph

    The graph to delete.

  Returns Promise<IGraphStoreResult>

graphExists

• graphExists(
      engine: QueryEngineBase,
      graph: NamedNode<string> | DefaultGraph,
  ): Promise<boolean>

  Determine if a graph is present in the graph store. The default graph is always present.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • graph: NamedNode<string> | DefaultGraph

    The graph to look for.

  Returns Promise<boolean>

handleRequest

• handleRequest(
      engine: QueryEngineBase,
      request: IncomingMessage,
      target: IGraphStoreTarget,
      graphStoreIri: string,
      readBody: () => Promise<string>,
  ): Promise<IGraphStoreResult>

  Handle a Graph Store HTTP Protocol request.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • request: IncomingMessage

    Request object.

  • target: IGraphStoreTarget

    The graph the request applies to.

  • graphStoreIri: string

    The IRI of the graph store.

  • readBody: () => Promise<string>

    A callback that reads the request body.

  Returns Promise<IGraphStoreResult>

  The outcome of the request.

parsePayload

• parsePayload(
      engine: QueryEngineBase,
      request: IncomingMessage,
      contentType: string,
      baseIRI: string,
      readBody: () => Promise<string>,
  ): Promise<AsyncIterator<Quad>[]>

  Parse the RDF payload of a request, which may consist of multiple parts.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • request: IncomingMessage

    Request object.

  • contentType: string

    The content type of the request body.

  • baseIRI: string

    The base IRI that relative IRIs in the payload are resolved against.

  • readBody: () => Promise<string>

    A callback that reads the request body.

  Returns Promise<AsyncIterator<Quad>[]>

  The quads of each part.

readGraph

• readGraph(
      engine: QueryEngineBase,
      graph: NamedNode<string> | DefaultGraph,
  ): Promise<IGraphStoreResult>

  Retrieve the contents of a graph.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • graph: NamedNode<string> | DefaultGraph

    The graph to retrieve.

  Returns Promise<IGraphStoreResult>

writeGraph

• writeGraph(
      engine: QueryEngineBase,
      graph: NamedNode<string> | DefaultGraph | undefined,
      replace: boolean,
      request: IncomingMessage,
      graphStoreIri: string,
      readBody: () => Promise<string>,
  ): Promise<IGraphStoreResult>

  Store the RDF payload of a request in a graph.

  Parameters

  • engine: QueryEngineBase

    A SPARQL engine.

  • graph: NamedNode<string> | DefaultGraph | undefined

    The graph to store the payload in, or undefined to create a new graph for it.

  • replace: boolean

    If the previous contents of the graph must be replaced instead of merged with.

  • request: IncomingMessage

    Request object.

  • graphStoreIri: string

    The IRI of the graph store, under which new graphs are created.

  • readBody: () => Promise<string>

    A callback that reads the request body.

  Returns Promise<IGraphStoreResult>

StaticconstructGraph

• constructGraph(graph: NamedNode<string> | DefaultGraph): BaseOperation

  Create a query that retrieves the contents of a graph as a single RDF graph.

  Parameters

  • graph: NamedNode<string> | DefaultGraph

    The graph to retrieve.

  Returns BaseOperation

StaticcreateGraphPattern

• createGraphPattern(graph: NamedNode<string> | DefaultGraph): Pattern

  Create a pattern that matches all triples of a graph.

  Parameters

  • graph: NamedNode<string> | DefaultGraph

    The graph to match.

  Returns Pattern

StaticdropGraph

• dropGraph(graph: NamedNode<string> | DefaultGraph): BaseOperation

  Create an update that removes a graph, together with all of its contents.

  Parameters

  • graph: NamedNode<string> | DefaultGraph

    The graph to remove.

  Returns BaseOperation

StaticgetMediaType

• getMediaType(contentType: string): string

  Determine the media type of a content type header value, without any of its parameters.

  Parameters

  • contentType: string

    A content type header value.

  Returns string

StaticgetMethodAdvertisementHeaders

• getMethodAdvertisementHeaders(target: IGraphStoreTarget): Record<string, string>

  Determines the headers with which this service advertises the HTTP methods that a resource supports.

  Parameters

  • target: IGraphStoreTarget

    The graph, or the graph store itself, that a request applies to.

  Returns Record<string, string>

  The method advertisement headers.

StaticgetTarget

• getTarget(
      request: IncomingMessage,
      requestUrl: UrlWithParsedQuery,
      graphStoreIri: string,
  ): IGraphStoreTarget | undefined

  Determine the graph that a request applies to, if it is a Graph Store HTTP Protocol request.

  Parameters

  • request: IncomingMessage

    Request object.

  • requestUrl: UrlWithParsedQuery

    The parsed request URL.

  • graphStoreIri: string

    The IRI of the graph store.

  Returns IGraphStoreTarget | undefined

  The graph, or undefined if this is not a graph store request.

StaticsplitMultipart

• splitMultipart(
      body: string,
      contentType: string,
  ): { body: string; contentType: string }[]

  Split a multipart/form-data payload into the RDF payloads it consists of.

  Parameters

  • body: string

    The multipart payload.

  • contentType: string

    The content type of the payload, which declares the boundary.

  Returns { body: string; contentType: string }[]

  The content type and body of each part.