654 lines
23 KiB
JavaScript
654 lines
23 KiB
JavaScript
/**
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** ==============================
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** O O O OOOO
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** O O O O O O
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** O O O O O O
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** OOOO OOOO O OOO OOOO
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** O O O O O O O
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** O O O O O O O
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** OOOO OOOO O O OOOO
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** ==============================
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** Dr. Stefan Bosse http://www.bsslab.de
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**
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** COPYRIGHT: THIS SOFTWARE, EXECUTABLE AND SOURCE CODE IS OWNED
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** BY THE AUTHOR(S).
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** THIS SOURCE CODE MAY NOT BE COPIED, EXTRACTED,
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** MODIFIED, OR OTHERWISE USED IN A CONTEXT
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** OUTSIDE OF THE SOFTWARE SYSTEM.
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**
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** $AUTHORS: Stefan Bosse
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** $INITIAL: (C) 2006-2017 bLAB
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** $CREATED: 28-3-15 by sbosse.
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** $VERSION: 1.2.7
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**
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** $INFO:
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**
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** ==============================================
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** DOS: Broker Connection Module
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** Server Side, Synchronous HTTP connection (blocking client side)
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** Data transfer: XML + EABC (compacted ASCII)
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** ==============================================
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*
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*
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** $ENDOFINFO
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*/
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"use strict";
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var log = 0;
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var Io = Require('com/io');
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var Net = Require('dos/network');
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var Buf = Require('dos/buf');
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var Rpc = Require('dos/rpc');
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var util = Require('util');
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var http = Require('http');
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var xmldoc = Require('dos/ext/xmldoc');
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var Sch = Require('dos/scheduler');
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var Comp = Require('com/compat');
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var Perv = Comp.pervasives;
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var String = Comp.string;
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var Array = Comp.array;
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var Filename = Comp.filename;
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var div = Perv.div;
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var Conn = Require('dos/connutils');
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var isNode = Comp.isNodeJS();
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/**************************
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** HTTP Broker Communciation SERVER
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**************************/
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/**
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*
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* @param {port} hostport
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* @param {string} srv_url
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* @param {string} srv_ipport
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* @param {rpcrouter} router
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* @constructor
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*/
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// typeof options : {hostport,srv_url,srv_ipport,router,verbose,env}
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var Server = function(options) {
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var self=this;
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this.env=options.env||{};
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this.srv_url=options.srv_url; // URL
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this.srv_ipport=options.srv_ipport; // URL:port
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this.hostport=options.hostport; // Public communication Net.Port == Host port
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this.status = Net.Status.STD_OK;
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this.router=options.router;
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this.app=undefined;
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this.https=undefined;
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// Pending collect requests of clients
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this.client_queue=[];
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// Message queue for client collect requests
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this.rpcio_queue=[];
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this.lock=false;
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this.timeout=100; // Queue timeout
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this.conn_port=Net.uniqport();
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this.rpccon=Rpc.RpcConn(
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self.conn_port,
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/*
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** send: Connection Forward and Deliver Operation
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*/
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function (rpcio,callback) {
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// We must store and handle these messages for client collection requests!!
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// console.log(rpcio)
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rpcio.timeout=Sch.GetTime()+self.timeout;
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self.rpcio_queue.push(rpcio);
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// Trigger schedule
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if (callback && rpcio.callback==undefined) rpcio.callback=callback;
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else if (rpcio.callback!=undefined) Io.out('[BHPS] Warning: RPCIO has a callback: '+util.inspect(rpcio));
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self.schedule();
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// console.log(rpcio.callback)
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},
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// alive: We're handling multiple client connections - we're alive
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function() {
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return true;
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}
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);
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this.rpccon.multiport=true;
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this.verbose=options.verbose||0;
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this.mode=Conn.Mode.ONECHAN; // Always bidirectional one channel mode initiated by client only
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this.stats=this.rpccon.stats;
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};
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/** Client-App collect request (send pending and queued TRANSREQ/TRANSREP/LOOKUP messages)
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*
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*/
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Server.prototype.collect = function (params, response) { // HTTP Callback handler
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var hostport, res, client,
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self=this,
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timeout = (params.timeout != undefined) ? (Perv.int_of_string(params.timeout)) : 0;
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self.stats.op_forward++;
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hostport = Net.port_of_param(params.hostport);
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/*
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** 1. Collect TRANS message requests if there are pending requests for the host port.
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** 2. Collect TRANS message reqeplies if there are pending replies for the host port.
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** 3. Collect LOOKUP messages (broadcast)
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** 4. Collect IAMHERE messages
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*
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** If there are actually no messages, add this request to the request queue (if timeout <>0).
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*/
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/*
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** Forward all pending transaction and auxiliary requests and replies...
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*/
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Io.log((self.router.monitor < 2) || ('[BHPS] collect for client host ' + Net.Print.port(hostport)+
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' #rpcio='+ Array.length(this.rpcio_queue)));
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client = {timeout: timeout, hostport: hostport, response: response};
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res = self.schedule_client(client,true);
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if (res && timeout) {
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// Hold connection until timeout occurs or messages are available
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self.client_queue.push(client);
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}
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};
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/** Create a reply message from a rpcio object
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*
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*/
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Server.prototype.format = function (rpcio) {
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var msg,data,buf;
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switch (rpcio.operation) {
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case Rpc.Operation.TRANSREQ:
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data = rpcio.to_json('simple');
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msg={rpc:'trans',hostport:rpcio.hostport,sendport:rpcio.sendport,
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hop:rpcio.hop,tid:rpcio.tid,data:data};
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break;
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case Rpc.Operation.TRANSREP:
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data = rpcio.to_json('simple');
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msg={rpc:'reply',hostport:rpcio.hostport,sendport:rpcio.sendport,
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hop:rpcio.hop,tid:rpcio.tid,data:data};
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break;
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case Rpc.Operation.LOOKUP:
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msg={rpc:'lookup',hostport:rpcio.hostport,srvport:rpcio.header.h_port,
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hop:rpcio.hop};
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break;
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case Rpc.Operation.IAMHERE:
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msg={rpc:'iamhere',hostport:rpcio.hostport,sendport:rpcio.sendport,
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srvport:rpcio.header.h_port,hop:rpcio.hop};
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break;
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}
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return msg;
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}
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/** Service HTTP GET reqest (short messages w/o data)
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*
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*/
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Server.prototype.get = function (request, response) {
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var i,str,
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self=this,
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hostport, srvport, sendport, buf, hdr, rpcio,
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params = Conn.parseQueryString(request.url);
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self.stats.op_get++;
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Io.log(((log+self.verbose) < 2) || ('[BHPS] GET: ' + request.url));
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Io.log(((log+self.verbose) < 10) || ('[BHPS] GET: ' + util.inspect(params)));
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response.origin=request.headers.origin;
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if (params.rpc != undefined &&
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params.rpc == 'request' &&
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params.hostport != undefined)
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{
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/**************************************************
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** RPC forward request (HTTP Client- /Browser App. collector request)
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*************************************************/
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self.collect(params,response);
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} else if (params.rpc != undefined &&
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params.rpc == 'iamhere' &&
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params.hostport != undefined &&
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params.srvport != undefined &&
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params.sendport != undefined)
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{
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/********************************
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** IAMHERE rpc message
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********************************/
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hostport = Net.port_of_param(params.hostport);
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srvport = Net.port_of_param(params.srvport);
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sendport = Net.port_of_param(params.sendport);
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{
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if (self.verbose && this.router.lookup_host(hostport)==undefined)
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Io.out('[BHPS] IAMHERE! Adding remote host ' +
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Net.Print.port(hostport) + ' ip=' + request.connection.remoteAddress +
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((params.port && params.port!='undefined')?(' ipport=' + params.port):''));
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this.router.add_host(hostport, this.rpccon.port);
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rpcio=this.router.pkt_get();
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rpcio.operation=Rpc.Operation.IAMHERE;
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rpcio.connport=self.rpccon.port;
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rpcio.hostport=hostport;
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rpcio.sendport=sendport;
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rpcio.header.h_port=srvport;
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this.router.route(rpcio);
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}
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/*
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{
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self.router.add_port(srvport, hostport);
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self.router.add_host(hostport, self.rpccon.port);
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Io.log((log < 1) || ('[BHPS] server get IAMHERE: adding server port ' +
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Net.Print.port(srvport) + ' located on host ' + Net.Print.port(hostport)));
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self.router.remove_lookup(srvport);
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// TBD: search for stalled transactions that must be send to another server capable host!
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// Broker connected client apps. will collect the appropriate transaction on the next request round.
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//res.
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}
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*/
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this.send(response, 'EOK');
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} else if (params.rpc != undefined &&
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params.rpc == 'lookup' &&
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params.hostport != undefined &&
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params.srvport != undefined)
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{
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/********************************
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** LOOKUP rpc message
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********************************/
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hostport = Net.port_of_param(params.hostport);
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srvport = Net.port_of_param(params.srvport);
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{
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if (self.verbose && this.router.lookup_host(hostport)==undefined)
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Io.out('[BHPS] LOOKUP! Searching server port ' + Net.Print.port(srvport));
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rpcio=self.router.pkt_get();
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rpcio.operation=Rpc.Operation.LOOKUP;
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rpcio.connport=this.rpccon.port;
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rpcio.hostport=hostport;
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//rpcio.sendport=self.router.hostport;
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rpcio.header.h_port=srvport;
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this.router.route(rpcio);
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}
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/*
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{
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self.router.add_port(srvport, hostport);
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self.router.add_host(hostport, self.rpccon.port);
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Io.log((log < 1) || ('[BHPS] server get IAMHERE: adding server port ' +
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Net.Print.port(srvport) + ' located on host ' + Net.Print.port(hostport)));
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self.router.remove_lookup(srvport);
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// TBD: search for stalled transactions that must be send to another server capable host!
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// Broker connected client apps. will collect the appropriate transaction on the next request round.
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//res.
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}
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*/
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this.send(response, 'EOK');
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} else if (params.alive != undefined &&
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params.hostport != undefined)
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{
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/***************************
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** ALIVE message request
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***************************/
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this.stats.op_alive++;
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buf=Buf.Buffer();
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hostport = Net.port_of_param(params.hostport);
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if (self.verbose && self.router.lookup_host(hostport)==undefined)
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Io.out('[BHPS] ALIVE! Adding remote host ' +
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Net.Print.port(hostport) + ' ip=' + params.ip + (params.ipport!='undefined'?(' ipport=' + params.ipport):''));
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this.router.add_host(hostport,this.rpccon.port);
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//res.
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Buf.buf_put_port(buf,this.hostport);
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this.send(response, Buf.buf_to_hex(buf));
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} else if (params.ask != undefined &&
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params.xname != undefined)
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{
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/***************************
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** ASK message request
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***************************/
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this.stats.op_ask++;
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buf=Buf.Buffer();
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//console.log(self.env[params.xname]);
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if (params.xname=='geo') {
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if (options.geoip) {
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var ip = '127.0.0.1'; // TODO src IP
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var loc = options.geoip.lookup(ip);
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if (loc)
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Buf.buf_put_string(buf,JSON.stringify(loc));
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else
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Buf.buf_put_string(buf,'undefined');
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} else Buf.buf_put_string(buf,'undefined');
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}
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else Buf.buf_put_string(buf,this.env[params.xname]||'undefined');
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this.send(response, Buf.buf_to_hex(buf));
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} else if (params.notify != undefined &&
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params.xname != undefined &&
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params.xvalue !=undefined)
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{
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/***************************
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** NOTIFY message request
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***************************/
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this.rpccon.stats.op_notify++;
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this.env[params.xname]=params.xvalue;
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// console.log(self.env[params.xname]);
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this.send(response, 'EOK');
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} // res.
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else
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this.send(response, 'EINVALID');
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};
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/** Initialize this connection server
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*
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*/
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Server.prototype.init = function () {
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var self = this;
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this.https = http.createServer(function(request, response) {
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//console.log(response);
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String.match(request.method,[
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['GET',function() {
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self.get(request,response);
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}],
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['POST',function() {
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self.put(request,response);
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}]
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])
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});
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this.https.on("connection", function (socket) {
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socket.setNoDelay(true);
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});
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this.https.on("error", function (er) {
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Io.out('[BHPS] listen: listening on * ' + self.srv_ipport+' failed: '+er);
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});
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this.router.add_conn(self.rpccon);
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};
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Server.prototype.log = function (v) {log=v};
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/** Service HHTP PUT/POST request (long messages with data)
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*
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*/
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Server.prototype.put = function (request, response) {
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var params = Conn.parseQueryString(request.url),
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self=this;
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self.stats.op_put++;
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Io.log(((log+self.verbose) < 2) || ('[BHPS] PUT: ' + request.url));
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Io.log(((log+self.verbose) < 10) || ('[BHPS] PUT: ' + util.inspect(params)));
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Io.log((log<10)||('[BHPS] PUT: STATUS=' + request.statusCode));
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Io.log((log<10)||('[BHPS] PUT: HEADERS=' + JSON.stringify(request.headers)));
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response.origin=request.headers.origin;
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if (params.rpc != undefined &&
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params.rpc == 'trans' &&
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params.hostport != undefined &&
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params.sendport != undefined &&
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params.tid != undefined) {
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self.trans(params,request,response);
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} else if (params.rpc != undefined &&
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params.rpc == 'reply' &&
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params.hostport != undefined &&
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params.sendport != undefined &&
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params.tid != undefined) {
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self.reply(params,request,response);
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} else
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//res.
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self.send(response,'EINVALID');
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};
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/** Process a reply
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*
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*/
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Server.prototype.reply = function (params, request, response) { // HTTP Callback handler
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/*************************
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* Transaction Reply
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************************/
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var body,
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self=this;
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/*
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** Reply for a transaction must be forwarded to the transaction origin collected by the source host application and
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** the next http get/?rpc=request request.
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*/
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request.setEncoding('utf8');
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body='';
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request.on('data', function (chunk) {
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body=body+chunk;
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});
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request.on('end', function () {
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Io.log(((log+self.verbose) < 10)||('[BHPS] BODY: ' + body));
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// New transaction request from client app., add it to the transaction queue.
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var xml = new xmldoc.XmlDocument(body),
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header = xml.childNamed('header'),
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data = xml.childNamed('data'),
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hostport = Net.port_of_param(params.hostport),
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sendport = Net.port_of_param(params.sendport),
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buf = Buf.Buffer(Conn.getData(header)),
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rpcio = self.router.pkt_get(),
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tid;
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Buf.buf_get_hdr(buf,rpcio.header);
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rpcio.init(Rpc.Operation.TRANSREP, rpcio.header, Conn.getData(data));
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rpcio.context=undefined; // rpc not from here!
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tid = Perv.int_of_string(params.tid);
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rpcio.tid = tid;
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rpcio.hostport = hostport;
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rpcio.sendport = sendport;
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rpcio.connport = self.rpccon.port;
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Io.log(((log+self.verbose) < 2)||('[BHPS] PUT: got reply, hostport=' +
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Net.Print.port(hostport) + ' tid=' + tid + ' srvport=' + Net.Print.port(rpcio.header.h_port)));
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self.router.route(rpcio);
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//res.
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self.send(response,'EOK');
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});
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};
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/*
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** Schedule all pending client-side requests if there is matching input.
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** Called from router function. Lock required!
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*/
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Server.prototype.schedule = function () {
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var self = this,
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i;
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if (self.lock) return;
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this.rpccon.stats.op_schedule++;
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Io.log(((log+self.verbose)<2) || ('[BHPS] schedule #clients='+this.client_queue.length+' .. '));
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this.lock = true;
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this.client_queue = Array.filter(this.client_queue, function (client) {
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/*
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* Forward all matching pending transaction requests and replies...
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*/
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Io.log(((log+self.verbose) < 2) || ('[BHPS] schedule for client host ' + Net.Print.port(client.hostport)+
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' #rpcio='+ Array.length(self.rpcio_queue)));
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return self.schedule_client(client,true);
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});
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this.lock = false;
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};
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/** Schedule pending transaction replies for a client
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*
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*/
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Server.prototype.schedule_client = function (client, discard) {
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var self = this,
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msgn = 0, i,
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buf, hdr, trans, cache, lookup, body ='',
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hostport = client.hostport,
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len=this.rpcio_queue.length;
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this.rpcio_queue = Array.filter(this.rpcio_queue, function (rpcio) {
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var hostport2;
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switch (rpcio.operation) {
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case Rpc.Operation.TRANSREQ:
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case Rpc.Operation.TRANSREP:
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hostport2 = self.router.lookup_port(rpcio.header.h_port);
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if ((hostport2 && rpcio.operation==Rpc.Operation.TRANSREQ && Net.port_cmp(hostport,hostport2)) ||
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(rpcio.sendport && rpcio.operation==Rpc.Operation.TRANSREP && Net.port_cmp(hostport,rpcio.sendport)) ||
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(rpcio.sendport && rpcio.operation==Rpc.Operation.TRANSREQ && Net.port_cmp(hostport,rpcio.sendport))) {
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body = body + rpcio.to_xml('rpc');
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msgn++;
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if (rpcio.callback) {rpcio.callback(Net.Status.STD_OK,rpcio); rpcio.callback=undefined;};
|
|
return false;
|
|
} else return true;
|
|
break;
|
|
|
|
/*
|
|
** Add all pending server port LOOKUP requests that are broadcast messages! ...
|
|
** Forward a LOOKUP of a server port search only once to a client host!
|
|
** Do not broadcast a LOOKUP to the initiator host (hostport)!
|
|
*/
|
|
case Rpc.Operation.LOOKUP:
|
|
if (rpcio.cache[hostport]==undefined && !Net.port_cmp(hostport,rpcio.hostport)) {
|
|
Io.log((self.router.monitor < 2) || ('[BHPS] schedule: lookup '+Rpc.Print.rpcio(rpcio)));
|
|
rpcio.cache[hostport]=1;
|
|
buf = Buf.Buffer();
|
|
Buf.buf_put_port(buf, rpcio.header.h_port);
|
|
body = body + '<rpc operation="LOOKUP" hostport="' + Net.port_to_str(rpcio.hostport) + '">' +
|
|
Buf.buf_to_hex(buf) + '</rpc>';
|
|
// Broadcast message! rpcio.callback handled in garbage collector
|
|
msgn++;
|
|
}
|
|
return true;
|
|
break;
|
|
|
|
case Rpc.Operation.IAMHERE:
|
|
if (Net.port_cmp(hostport,rpcio.sendport)) {
|
|
buf = Buf.Buffer();
|
|
Buf.buf_put_port(buf, rpcio.header.h_port);
|
|
body = body + '<rpc operation="IAMHERE" hostport="'+ Net.port_to_str(rpcio.hostport)+'" sendport="' + Net.port_to_str(rpcio.sendport) + '">' +
|
|
Buf.buf_to_hex(buf) + '</rpc>';
|
|
msgn++;
|
|
if (rpcio.callback) {rpcio.callback(Net.Status.STD_OK,rpcio); rpcio.callback=undefined;}
|
|
return false;
|
|
} else return true;
|
|
break;
|
|
}
|
|
return true;
|
|
});
|
|
Io.log(((log+self.verbose) < 2) || ('[BHPS] schedule_client for host ' + Net.Print.port(hostport)+ ' ['+len+'] '+body));
|
|
|
|
// console.log(body)
|
|
if (msgn > 0) {
|
|
this.stats.op_messages=this.stats.op_messages+msgn;
|
|
body = '<xml>' + body + '</xml>';
|
|
this.send(client.response, body);
|
|
return false;
|
|
} else if (client.timeout <= 0) {
|
|
body = 'ENOENTR';
|
|
this.send(client.response, body);
|
|
return false;
|
|
} else return true;
|
|
}
|
|
|
|
Server.prototype.send = function (response, data) {
|
|
//console.log(response.connection);
|
|
|
|
if (response.connection==null) {
|
|
if (this.verbose>0) Io.out('[BHPS] Cannot send reply ['+(data.length<100?data:data.length)+']. Connection closed.');
|
|
return; // TODO ??
|
|
}
|
|
//response.writeHead(200, {'Content-Type': 'text/plain; charset=utf8'});
|
|
//response.writeHead(200);
|
|
this.rpccon.stats.op_send++;
|
|
Io.log(((log+this.verbose)<3)||('[BHPS] send ['+(data.length<100?data:data.length)+'] to '+
|
|
(response.origin!=undefined?response.origin:'?')));
|
|
if (response.origin!=undefined)
|
|
response.writeHead(200,{'Access-Control-Allow-Origin': response.origin,
|
|
'Access-Control-Allow-Credentials': 'true',
|
|
'Content-Type': 'text/plain'});
|
|
else
|
|
response.writeHead(200,{'Content-Type': 'text/plain'});
|
|
response.write(data);
|
|
response.end();
|
|
};
|
|
|
|
/**
|
|
*
|
|
* @param {number} [interval]
|
|
*/
|
|
Server.prototype.start = function (interval) {
|
|
var self = this;
|
|
if (!interval) interval=1000;
|
|
/*
|
|
** Start a client service and garbage collector for blocked client-side transactions (self.client_queue)
|
|
*/
|
|
Sch.AddTimer(interval, 'BHPS Garbage Collector', function (context) {
|
|
var time;
|
|
Io.log(((log+self.verbose)<3)||('[BHPS] Garbage Collector ['+self.client_queue.length+']'));
|
|
if (!self.lock) {
|
|
self.lock = true;
|
|
self.client_queue = Array.filter(self.client_queue, function (client) {
|
|
var res = self.schedule_client(client,false /*?*/);
|
|
client.timeout -= interval;
|
|
return res;
|
|
});
|
|
time=Sch.GetTime();
|
|
self.rpcio_queue = Array.filter(self.rpcio_queue, function (rpcio) {
|
|
if (rpcio.timeout > 0 && rpcio.timeout <= time) {
|
|
if (rpcio.callback) {rpcio.callback(
|
|
rpcio.operation==Rpc.Operation.LOOKUP?Net.Status.STD_OK:Net.Status.RPC_FAILURE,
|
|
rpcio); rpcio.callback=undefined;};
|
|
return false;
|
|
}
|
|
else return true;
|
|
});
|
|
self.lock = false;
|
|
} else {
|
|
context.blocked=false;
|
|
context.timer=Sch.time;
|
|
Sch.ScheduleNext();
|
|
}
|
|
});
|
|
|
|
this.https.listen(this.srv_ipport, function () {
|
|
Io.out('[BHPS] Listening on *:' + self.srv_ipport+' HTTP');
|
|
});
|
|
};
|
|
|
|
Server.prototype.stop = function () {
|
|
Sch.RemoveTimer('BHPS Garbage Collector');
|
|
};
|
|
|
|
/** Process a transaction request
|
|
*
|
|
*/
|
|
Server.prototype.trans = function (params, request, response) { // HTTP Callback handler
|
|
var body,
|
|
self=this;
|
|
/***************************
|
|
** Incoming TRANS message
|
|
**************************/
|
|
request.setEncoding('utf8');
|
|
body = '';
|
|
request.on('data', function (chunk) {
|
|
body = body + chunk;
|
|
});
|
|
request.on('end', function () {
|
|
Io.log(((log+self.verbose) < 10) || ('BODY: ' + body));
|
|
// New transaction request from client app., add it to the transaction queue.
|
|
var xml = new xmldoc.XmlDocument(body),
|
|
header = xml.childNamed('header'),
|
|
data = xml.childNamed('data'),
|
|
rpcio = self.router.pkt_get(),
|
|
hostport = Net.port_of_param(params.hostport),
|
|
sendport = Net.port_of_param(params.sendport),
|
|
buf = Buf.Buffer(Conn.getData(header));
|
|
Buf.buf_get_hdr(buf, rpcio.header);
|
|
Io.log((log < 2) || (('[BHPS] post: ' + Net.Print.header(rpcio.header))));
|
|
rpcio.init(Rpc.Operation.TRANSREQ, rpcio.header, Conn.getData(data));
|
|
rpcio.context=undefined; // rpc not from here!
|
|
rpcio.tid = Perv.int_of_string(params.tid);
|
|
rpcio.hostport = hostport;
|
|
rpcio.sendport = sendport;
|
|
// if (local request) service ..
|
|
self.router.add_host(rpcio.hostport,self.rpccon.port);
|
|
self.router.route(rpcio);
|
|
// TBD: Check for local waiting servers in routing_db...
|
|
//res.
|
|
self.send(response, 'EWOULDBLOCK');
|
|
});
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
module.exports = {
|
|
/** RCP Broker Server for client-capable-only applications
|
|
*
|
|
*/
|
|
// type options = {hostport:port,srv_ip,srv_ipport,router,verbose?,env?:{}}
|
|
Server: function(options) {
|
|
var obj = new Server(options);
|
|
Object.preventExtensions(obj);
|
|
return obj;
|
|
}
|
|
};
|