/usr/lib/swipl/library/http/json.pl
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  • library
    • http
      • http_unix_daemon.pl -- Run SWI-Prolog HTTP server as a Unix system daemon
      • thread_httpd.pl -- Threaded HTTP server
      • http_wrapper.pl -- Server processing of an HTTP request
      • http_header.pl -- Handling HTTP headers
      • http_stream.pl -- HTTP Streams
      • http_exception.pl -- Map Prolog exceptions to HTTP errors
      • http_path.pl -- Abstract specification of HTTP server locations
      • http_dispatch.pl -- Dispatch requests in the HTTP server
      • http_host.pl -- Obtain public server location
      • http_ssl_plugin.pl -- SSL plugin for HTTP libraries
      • http_json.pl -- HTTP JSON Plugin module
      • http_client.pl -- HTTP client library
      • json.pl -- Reading and writing JSON serialization
        • atom_json_term/3
        • json_read/2
        • json_read/3
        • json_write/2
        • json_write/3
        • json_write_hook/4
        • json_dict_pairs/2
        • is_json_term/1
        • is_json_term/2
        • json_read_dict/2
        • json_read_dict/3
        • json_write_dict/2
        • json_write_dict/3
        • atom_json_dict/3
      • http_open.pl -- HTTP client library
      • http_parameters.pl -- Extract parameters (GET and POST) from HTTP requests
      • http_multipart_plugin.pl -- Multipart form-data plugin
      • http_hook.pl -- HTTP library hooks
      • html_write.pl -- Write HTML text
      • html_quasiquotations.pl -- HTML quasi quotations
      • js_write.pl -- Utilities for including JavaScript
      • js_grammar.pl -- JavaScript grammar
      • http_server_files.pl -- Serve files needed by modules from the server
      • hub.pl -- Manage a hub for websockets
      • websocket.pl -- WebSocket support
      • http_session.pl -- HTTP Session management
      • mimetype.pl -- Determine mime-type for a file
      • http_cors.pl -- Enable CORS: Cross-Origin Resource Sharing
      • html_head.pl -- Automatic inclusion of CSS and scripts links
      • jquery.pl -- Provide JQuery
      • term_html.pl -- Represent Prolog terms as HTML
      • http_dyn_workers.pl -- Dynamically schedule HTTP workers.
      • http_authenticate.pl -- Authenticate HTTP connections using 401 headers
      • http_digest.pl -- HTTP Digest authentication
      • json_convert.pl -- Convert between JSON terms and Prolog application terms
      • mimepack.pl -- Create a MIME message
 json_write_hook(+Term, +Stream, +State, +Options) is semidet[multifile, library(http/json)]
Hook that can be used to emit a JSON representation for Term to Stream. If the predicate succeeds it must have written a valid JSON data element and if it fails it may not have produced any output. This facility may be used to map arbitrary Prolog terms to JSON. It was added to manage the precision with which floating point numbers are emitted.

Note that this hook is shared by all users of this library. It is generally adviced to map a unique compound term to avoid interference with normal output.

Arguments:
State- and Options are opaque handles to the current output state and settings. Future versions may provide documented access to these terms. Currently it is adviced to ignore these arguments.