+++ /dev/null
-
-(* Copyright (C) 2002, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-(* TODO braindead situation: /add of a stylesheet which uri is an uwobo
-invocation *)
-
-open Printf;;
-open Uwobo_common;;
-
- (* debugging settings *)
-let debug = true;;
-let debug_level = `Debug;;
-let debug_print s = if debug then prerr_endline s;;
-let http_debug = false;;
-Http_common.debug := http_debug;;
-
- (* environment settings *)
-let daemon_name = "UWOBO OCaml";;
-let default_port = 8082;;
-let port_env_var = "UWOBO_PORT";;
-let default_media_type = "text/html";;
-let default_encoding = "utf8";;
-let port =
- try
- int_of_string (Sys.getenv port_env_var)
- with
- | Not_found -> default_port
- | Failure "int_of_string" ->
- prerr_endline "Warning: invalid port, reverting to default";
- default_port
-in
-
- (* facilities *)
-let pp_error = sprintf "<html><body><h1>Error: %s</h1></body></html>" in
-let return_error msg outchan =
- (* return an ok (200) http response, which display in html an error message *)
- Http_daemon.respond ~body:(pp_error msg) outchan
-in
-let bad_request body outchan = (* return a bad request http response *)
- Http_daemon.respond_error ~status:(`Client_error `Bad_request) ~body outchan
-in
-
- (* values common to all threads *)
-let syslogger = new Uwobo_logger.sysLogger ~level:debug_level () in
-syslogger#enable;
-let styles = new Uwobo_styles.styles in
-let usage_string =
- sprintf
-"
-<html>
- <head>
- <title>UWOBO's help message</title>
- </head>
- <body>
- <p>
- Usage: <kbd>http://hostname:uwoboport/</kbd><em>command</em>
- </p>
- <p>
- Available commands:
- </p>
- <p>
- <b><kbd>help</kbd></b><br />
- display this help message
- </p>
- <p>
- <b><kbd>add?bind=key,uri[&bind=key,stylesheet[&...]]</kbd></b><br />
- load a new stylesheet, specified by <em>uri</em>, and bind it to key
- <em>key</em>
- </p>
- <p>
- <b><kbd>remove?[?keys=key1,key2,...]</kbd></b><br />
- unload stylesheets specified by <em>key1, key2, ...</em> or all
- stylesheets if no key was given
- </p>
- <p>
- <b><kbd>reload?[?keys=key1,key2,...]</kbd></b><br />
- reload stylesheets specified by <em>key1, key2, ...</em> or all
- stylesheets if no key was given
- </p>
- <p>
- <b><kbd>list</kbd></b><br />
- return a list of loaded stylesheets
- </p>
- <p>
- <b><kbd>apply?xmluri=uri&keys=key1,key2,...[¶m.name=value[¶m.name=value[&...]]][¶m.key.name=value[¶m.key.name=value[&...]]][&name[=value][&prop.name[=value][&...]]]</kbd></b><br />
- apply a chain of stylesheets, specified by <em>key1, key2, ...</em>, to an
- input document, specified by <em>uri</em>.<br />
- Additional parameters can be set for each stylesheet application: global
- parameters (i.e. parameters passed to all stylesheets) are set using
- <em>param.name=value</em> syntax, per stylesheet parameters are set using
- <em>param.key.name=value</em> where <em>key</em> is the key of a loaded
- stylesheet.<br />
- Properties of the final chain output can be set too: valueless properties
- can be set using <em>prop.name</em> syntax, others can be set using
- <em>prop.name=value</em> syntax.<br />
- Current supported properties are: %s.
- </p>
- </body>
-</html>
-"
- (String.concat ", " Uwobo_common.supported_properties)
-in
-
- (* thread action *)
-let callback req outchan =
- (* perform an 'action' that can be applied to a list of keys or, if no
- keys was given, to all keys *)
- let act_on_keys req styles outchan per_key_action all_keys_action logmsg =
- let log = new Uwobo_logger.processingLogger () in
- let keys =
- try
- Pcre.split ~pat:"," (req#param "keys")
- with Http_request.Param_not_found _ -> []
- in
- (match keys with
- | [] -> (* no key provided, act on all stylesheets *)
- log#log "reloading all stylesheets ...";
- (try all_keys_action () with e -> log#log (Printexc.to_string e))
- | keys ->
- List.iter
- (fun key -> (* act on a single stylesheet *)
- log#log (sprintf "%s stylesheet %s" logmsg key);
- (try per_key_action key with e -> log#log (Printexc.to_string e)))
- keys);
- Http_daemon.respond ~body:log#asHtml outchan
- in
- let parse_apply_params = (* parse parameters for '/apply' action *)
- let is_global_param x = Pcre.pmatch ~pat:"^param(\\.[^.]+){1}$" x in
- let is_local_param x = Pcre.pmatch ~pat:"^param(\\.[^.]+){2}$" x in
- let is_property x = Pcre.pmatch ~pat:"^prop\\.[^.]+$" x in
- List.fold_left
- (fun (old_params, old_properties) (name, value) ->
- match name with
- | name when is_global_param name ->
- let name = Pcre.replace ~pat:"^param\\." name in
- ((fun x -> (old_params x) @ [name, value]), old_properties)
- | name when is_local_param name ->
- let pieces = Pcre.extract ~pat:"^param\\.([^.]+)\\.(.*)" name in
- let (key, name) = (pieces.(1), pieces.(2)) in
- ((function
- | x when x = key -> [name, value] @ (old_params x)
- | x -> old_params x),
- old_properties)
- | name when is_property name ->
- let name = Pcre.replace ~pat:"^prop\\." name in
- (old_params, ((name, value) :: old_properties))
- | _ -> (old_params, old_properties))
- ((fun _ -> []), []) (* no parameters, no properties *)
- in
- try
- syslogger#log `Debug (sprintf "Received request: %s" req#path);
- (match req#path with
- | "/add" ->
- (let bindings = req#paramAll "bind" in
- if bindings = [] then
- return_error "No [key,stylesheet] binding provided" outchan
- else begin
- let log = new Uwobo_logger.processingLogger () in
- List.iter
- (fun binding -> (* add a <key, stylesheet> binding *)
- let pieces = Pcre.split ~pat:"," binding in
- match pieces with
- | [key; style] ->
- log#log (sprintf "adding binding <%s,%s>" key style);
- (try
- styles#add key style;
- with e ->
- log#log (Printexc.to_string e))
- | _ -> log#log (sprintf "invalid binding %s" binding))
- bindings;
- Http_daemon.respond ~body:log#asHtml outchan
- end)
- | "/list" ->
- (let log = new Uwobo_logger.processingLogger () in
- log#log "Stylesheet list:";
- List.iter (fun s -> log#log s) styles#list;
- Http_daemon.respond ~body:log#asHtml outchan)
- | "/remove" ->
- act_on_keys
- req styles outchan
- styles#remove (fun () -> styles#removeAll) "removing"
- | "/reload" ->
- act_on_keys
- req styles outchan
- styles#reload (fun () -> styles#reloadAll) "reloading"
- | "/apply" ->
- if Unix.fork () = 0 then
- (let logger = new Uwobo_logger.processingLogger () in
- let xmluri = req#param "xmluri" in
- let keys = Pcre.split ~pat:"," (req#param "keys") in
- (* notation: "local" parameters are those defined on a per-stylesheet
- pasis (i.e. param.key.param=value), "global" parameters are those
- defined for all stylesheets (i.e. param.param=value) *)
- let (params, props) = parse_apply_params req#params in
- syslogger#log `Debug (sprintf "Parsing input document %s ..." xmluri);
- let domImpl = Gdome.domImplementation () in
- let input = domImpl#createDocumentFromURI ~uri:xmluri () in
- syslogger#log `Debug "Applying stylesheet chain ...";
- try
- let (write_result, media_type, encoding) = (* out_channel -> unit *)
- Uwobo_engine.apply
- ~logger:syslogger ~styles ~keys ~input ~params ~props
- in
- let content_type = (* value of Content-Type HTTP response header *)
- sprintf
- "%s; charset=%s"
- (match media_type with None -> default_media_type | Some t -> t)
- (match encoding with None -> default_encoding | Some e -> e)
- in
- syslogger#log
- `Debug
- (sprintf
- "sending output to client (Content-Type: %s)...."
- content_type);
- Http_daemon.send_basic_headers ~code:200 outchan;
- Http_daemon.send_header "Content-Type" content_type outchan;
- Http_daemon.send_CRLF outchan;
- write_result outchan
- with Uwobo_failure errmsg ->
- return_error
- (sprintf "Stylesheet chain application failed: %s" errmsg)
- outchan)
- | "/help" -> Http_daemon.respond ~body:usage_string outchan
- | invalid_request ->
- Http_daemon.respond_error ~status:(`Client_error `Bad_request) outchan)
- with
- | Http_request.Param_not_found attr_name ->
- bad_request (sprintf "Parameter '%s' is missing" attr_name) outchan
- | exc ->
- Http_daemon.respond
- ~body:(pp_error ("Uncaught exception: " ^ (Printexc.to_string exc)))
- outchan
-in
-
- (* daemon initialization *)
-syslogger#log
- `Notice
- (sprintf "%s started and listening on port %d" daemon_name port);
-syslogger#log `Notice (sprintf "current directory is %s" (Sys.getcwd ()));
-Unix.putenv "http_proxy" ""; (* reset http_proxy to avoid libxslt problems *)
-Http_daemon.start' ~port ~mode:`Thread callback;
-syslogger#log `Notice (sprintf "%s is terminating, bye!" daemon_name)
-
projects / helm.git / blobdiff