- http
- http
- http_unix_daemon.pl
- 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
- http_path.pl
- http_dispatch.pl -- Dispatch requests in the HTTP server
- http_host.pl
- http_parameters.pl -- Extract parameters (GET and POST) from HTTP requests
- http_client.pl -- HTTP client library
- 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
- mimetype.pl -- Determine mime-type for a file
- html_head.pl -- Automatic inclusion of CSS and scripts links
- http_server_files.pl -- Serve files needed by modules from the server
- term_html.pl -- Represent Prolog terms as HTML
- json.pl -- Reading and writing JSON serialization
- http_open.pl -- HTTP client library
- http_session.pl -- HTTP Session management
- http_openid.pl -- OpenID consumer and server library
- yadis.pl -- Yadis discovery
- ax.pl -- Attribute Exchange library
- http_authenticate.pl -- Authenticate HTTP connections using 401 headers
- http_json.pl -- HTTP JSON Plugin module
- http_dirindex.pl -- HTTP directory listings
- js_write.pl -- Utilities for including JavaScript
- js_grammar.pl -- JavaScript grammar
- http_cors.pl -- Enable CORS: Cross-Origin Resource Sharing
- json_convert.pl -- Convert between JSON terms and Prolog application terms
- http_server.pl -- HTTP server library
- http_dyn_workers.pl -- Dynamically schedule HTTP workers.
- http_server_health.pl -- HTTP Server health statistics
- hub.pl -- Manage a hub for websockets
- websocket.pl -- WebSocket support
- http_log.pl -- HTTP Logging module
- mimepack.pl -- Create a MIME message
- http
- http_open_websocket(+URL, -WebSocket, +Options) is det
- Establish a client websocket connection. This predicate calls
http_open/3 with additional headers to negotiate a websocket
connection. In addition to the options processed by http_open/3, the
following options are recognised:
- subprotocols(+List)
- List of subprotocols that are acceptable. The selected
protocol is available as ws_property(WebSocket,
subprotocol(Protocol)
.
Note that clients often provide an Origin header and some servers require this field. See RFC 6455 for details. By default this predicate does not set Origin. It may be set using the
request_header
option of http_open/3, e.g. by passing this in the Options list:request_header('Origin' = 'https://www.swi-prolog.org')
The following example exchanges a message with the html5rocks.websocket.org echo service:
?- URL = 'ws://html5rocks.websocket.org/echo', http_open_websocket(URL, WS, []), ws_send(WS, text('Hello World!')), ws_receive(WS, Reply), ws_close(WS, 1000, "Goodbye"). URL = 'ws://html5rocks.websocket.org/echo', WS = <stream>(0xe4a440,0xe4a610), Reply = websocket{data:"Hello World!", opcode:text}.
- Arguments:
-
WebSocket - is a stream pair (see stream_pair/3)