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js/dos/connsrv.js
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571
js/dos/connsrv.js
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/**
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** ==================================
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** OOOO OOOO OOOO O O OOOO
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** O O O O O O O O O
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** O O O O O O O O O
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** OOOO OOOO OOOO O OOO OOOO
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** O O O O O O O O O
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** O O O O O O O O O
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** OOOO OOOO OOOO OOOO O O OOOO
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** ==================================
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** BSSLAB, 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.
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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) 2006-2016 BSSLAB
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** $CREATED: 3/28/15 by sbosse.
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** $VERSION: 1.1.6
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**
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** $INFO:
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**
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** DOS: Broker Server Connection Module (HTTP connection).
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**
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*
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* Notes:
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* Superfluous? All http function callback computations are wrapped by scheduler callbacks
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* to avoid main thread preemption!
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* Is event queuing always guaranteed in JS?
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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 trace = Io.tracing;
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var div = Perv.div;
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var Conn = Require('dos/connection');
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var isNode = Comp.isNodeJS();
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/**************************
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** HTTP Broker 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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var Server = function(hostport,srv_url,srv_ipport,router,verbose,env) {
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this.env=env||{};
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this.srv_url=srv_url; // URL
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this.srv_ipport=srv_ipport; // URL:port
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this.hostport=hostport; // Public communication Net.Port == Host port
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this.status = Net.Status.STD_OK;
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this.router=router;
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this.app=undefined;
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this.https=undefined;
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this.client_queue=[];
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this.lock=false;
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this.rpccon=Rpc.RpcConn(
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Net.uniqport(),
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/*
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** Connection Forward and Deliver Operation
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*/
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undefined,
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// Passive client conenctions: Notheing to do here, already handled by the router
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function(rpcio) {
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return true;
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}
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)
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this.verbose=verbose||0;
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this.env={};
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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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var i;
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if (self.lock) return;
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this.rpccon.stats.op_schedule++;
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Io.trace(trace || ('[BTTP] server schedule: '));
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self.lock = true;
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self.client_queue = Array.filter(self.client_queue, function (client) {
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var msgn = 0;
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var body = '';
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var trans, hdr, buf;
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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((self.router.monitor < 2) || ('[BTTP] schedule for client host ' + Net.Print.port(client.hostport)+
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' #trans='+ Array.length(self.router.trans_queue)+' #lookup='+Array.length(self.router.lookup_queue)));
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do {
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trans = self.router.lookup_trans_for_host(client.hostport);
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Io.log(((log+self.verbose) < 10) || ('[BTTP] schedule: lookup_trans_for_host=' + util.inspect(trans)));
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if (trans != undefined) {
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hdr = trans.header;
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Io.log(((log+self.verbose) < 2) || ('[BTTP] schedule: found trans=' + Rpc.Print.rpcio(trans)));
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Io.trace(trace || ('[BTTP] schedule: found trans=' + Rpc.Print.rpcio(trans)));
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if (trans.operation == Rpc.Operation.TRANSREQ) {
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// Forward transtion request
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body = body + trans.to_xml('rpc');
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msgn++;
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self.router.pkt_discard(trans);
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} else if (trans.operation == Rpc.Operation.TRANSREP) {
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// Transaction reply!
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body = body + trans.to_xml('rpc');
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msgn++;
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self.router.pkt_discard(trans);
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}
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}
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} while (trans != undefined);
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/*
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** Add all pending server port LOOKUP requests...
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** Forward a LOOKUP of a server port search only once to a client host!
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*/
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for (i in self.router.lookup_queue) {
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var lookup = self.router.lookup_queue[i];
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var cache = self.router.lookup_cache[i];
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Io.log((self.router.monitor < 2) || ('[BTTP] schedule: lookup '+Rpc.Print.rpcio(lookup)));
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if (cache[client.hostport]==undefined) {
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cache[client.hostport]=1;
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buf = Buf.Buffer();
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Buf.buf_put_port(buf, lookup.header.h_port);
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body = body + '<rpc operation="LOOKUP" hostport="' + Net.port_to_str(self.hostport) + '">' +
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Buf.buf_to_hex(buf) + '</rpc>';
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msgn++;
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}
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}
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if (msgn > 0) {
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self.rpccon.stats.op_messages=self.rpccon.stats.op_messages+msgn;
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body = '<xml>' + body + '</xml>';
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self.send(client.respond, body);
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return false;
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} else if (client.timeout <= 0) {
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body = 'ENOENTR';
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self.send(client.respond, body);
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return false;
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} else return true;
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});
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self.lock = false;
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};
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Server.prototype.send = function (response, data) {
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//response.writeHead(200, {'Content-Type': 'text/plain; charset=utf8'});
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//response.writeHead(200);
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this.rpccon.stats.op_send++;
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Io.log(((log+this.verbose)<10)||('[BHTP] send ['+data.length+']'));
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if (response.origin!=undefined)
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response.writeHead(200,{'Access-Control-Allow-Origin': response.origin,
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'Access-Control-Allow-Credentials': 'true',
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'Content-Type': 'text/plain'});
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else
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response.writeHead(200,{'Content-Type': 'text/plain'});
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response.write(data);
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response.end();
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};
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Server.prototype.forward = function (self, params, res) { // HTTP Callback handler
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var hostport, hdr, buf,i;
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this.rpccon.stats.op_forward++;
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hostport = Net.port_of_param(params.hostport);
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/*
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** 1. Forward TRANS message requests if there are pending requests for the host port.
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** 2. Forward LOOKUP messages (broadcast)
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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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var msgn = 0;
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var body = '';
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var timeout = (params.timeout != undefined) ? (Perv.int_of_string(params.timeout)) : 0;
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/*
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** Forward all pending transaction requests and replies...
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*/
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Io.log((self.router.monitor < 2) || ('[BTTP] forward for host ' + Net.Print.port(hostport)+
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' #trans='+ Array.length(self.router.trans_queue)+' #lookup='+Array.length(self.router.lookup_queue)));
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do {
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var trans = self.router.lookup_trans_for_host(hostport);
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Io.log(((log+this.verbose) < 10) || ('[BTTP] server get: lookup_trans_for_host=' + util.inspect(trans)));
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if (trans != undefined) {
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hdr = trans.header;
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Io.log(((log+self.verbose) < 2) || ('[BTTP] server get: found trans=' + Rpc.Print.rpcio(trans)));
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if (trans.operation == Rpc.Operation.TRANSREQ) {
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// Forward transtion request
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body = body + trans.to_xml('rpc');
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msgn++;
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self.router.pkt_discard(trans);
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} else if (trans.operation == Rpc.Operation.TRANSREP) {
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// Transaction reply!
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body = body + trans.to_xml('rpc');
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msgn++;
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self.router.pkt_discard(trans);
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}
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}
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} while (trans != undefined);
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/*
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** Add all pending server port LOOKUP requests...
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** Forward a LOOKUP of a server port search only once to a client host!
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*/
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for (i in self.router.lookup_queue) {
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var lookup = self.router.lookup_queue[i];
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var cache = self.router.lookup_cache[i];
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Io.log((self.router.monitor < 2 ) || ('[BTTP] forward: +lookup '+util.inspect(lookup)+' cache '+util.inspect(cache)));
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if (cache[hostport]==undefined) {
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cache[hostport] = 1;
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buf = Buf.Buffer();
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Buf.buf_put_port(buf, lookup.header.h_port);
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body = body + '<rpc operation="LOOKUP" hostport="' + Net.port_to_str(self.hostport) + '">' +
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Buf.buf_to_hex(buf) + '</rpc>';
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msgn++;
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}
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}
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if (msgn == 0) {
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if (timeout > 0) {
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self.client_queue.push({timeout: timeout, hostport: hostport, respond: res});
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} else {
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// short reply
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body = 'ENOENTR';
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//res.
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self.send(res, body);
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}
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} else {
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body = '<xml>' + body + '</xml>';
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//res.
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self.send(res, body);
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}
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};
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Server.prototype.get = function (self, req, res) {
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var i,str,
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hostport, srvport, buf, hdr,
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params = Conn.parseQueryString(req.url);
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this.rpccon.stats.op_get++;
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Io.log(((log+self.verbose) < 2) || ('[BTTP] server get: ' + req.url));
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Io.log(((log+self.verbose) < 10) || ('[BTTP] server get: ' + util.inspect(params)));
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Io.trace(trace || ('[BTTP] server get: ' + req.url));
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res.origin=req.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 request (HTTP Client- /Browser App. collector request)
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*************************************************/
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Sch.ScheduleCallback([Sch.Bind(self,self.forward),self, params,res]);
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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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{
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/********************************
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** short 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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{
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if (self.verbose && self.router.lookup_host(hostport)==undefined)
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Io.out('[BTTP] IAMHERE! Adding remote host ' +
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Net.Print.port(hostport) + ' ip=' + req.connection.remoteAddress +
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((params.port && params.port!='undefined')?(' ipport=' + params.port):''));
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self.router.add_host(hostport, self.rpccon.port);
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var rpcio=self.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=self.router.hostport;
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rpcio.header.h_port=srvport;
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self.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) || ('[BTTP] 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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self.send(res, 'STD_OK');
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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.rpccon.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('[BTTP] ALIVE! Adding remote host ' +
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Net.Print.port(hostport) + ' ip=' + params.url + (params.port!='undefined'?(' ipport=' + params.port):''));
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// TODO this.router.add_host(hostport, [params.url, params.port]);
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self.router.add_host(hostport,self.rpccon.port);
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//res.
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Buf.buf_put_port(buf,self.hostport);
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self.send(res, 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.rpccon.stats.op_ask++;
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buf=Buf.Buffer();
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//console.log(self.env[params.xname]);
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Buf.buf_put_string(buf,self.env[params.xname]||'undefined');
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self.send(res, 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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self.env[params.xname]=params.xvalue;
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//console.log(self.env[params.xname]);
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self.send(res, '');
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} // res.
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else
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self.send(res, 'EINVALID');
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};
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Server.prototype.trans = function (self, params, req, res) { // HTTP Callback handler
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var body;
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/***************************
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** Incoming TRANS message
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**************************/
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req.setEncoding('utf8');
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body = '';
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req.on('data', function (chunk) {
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body = body + chunk;
|
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});
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req.on('end', function () {
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Io.log(((log+self.verbose) < 10) || ('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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var header = xml.childNamed('header');
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var data = xml.childNamed('data');
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var rpcio = self.router.pkt_get();
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var hostport = Net.port_of_param(params.hostport);
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var buf = Buf.Buffer(Conn.getData(header));
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Buf.buf_get_hdr(buf, rpcio.header);
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Io.log((log < 2) || (('[BTTP] post: ' + Net.Print.header(rpcio.header))));
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rpcio.init(Rpc.Operation.TRANSREQ, rpcio.header, Conn.getData(data));
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rpcio.context=undefined; // rpc not from here!
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rpcio.tid = Perv.int_of_string(params.tid);
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rpcio.hostport = hostport;
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// if (local request) service ..
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self.router.add_host(rpcio.hostport,self.rpccon.port);
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self.router.route(rpcio);
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// TBD: Check for local waiting servers in routing_db...
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//res.
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self.send(res, 'EWOULDBLOCK');
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});
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};
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Server.prototype.reply = function (self, params, req, res) { // 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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/*
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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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req.setEncoding('utf8');
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body='';
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req.on('data', function (chunk) {
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body=body+chunk;
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});
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req.on('end', function () {
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Io.log(((log+self.verbose) < 10)||('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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var header = xml.childNamed('header');
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var data = xml.childNamed('data');
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var hostport = Net.port_of_param(params.hostport);
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var sendport = Net.port_of_param(params.sendport);
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var buf = Buf.Buffer(Conn.getData(header));
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var rpcio = self.router.pkt_get();
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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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var 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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Io.log(((log+self.verbose) < 2)||('[BTTP] post: 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(res,'STD_OK');
|
||||
});
|
||||
};
|
||||
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||||
Server.prototype.put = function (self, req, res) {
|
||||
var params = Conn.parseQueryString(req.url);
|
||||
this.rpccon.stats.op_put++;
|
||||
|
||||
Io.log(((log+self.verbose)<10)||('[BTTP] post: ' + util.inspect(params)));
|
||||
Io.log((log<10)||('[BTTP] post: STATUS=' + req.statusCode));
|
||||
Io.log((log<10)||('[BTTP] post: HEADERS=' + JSON.stringify(req.headers)));
|
||||
Io.trace(trace||('[BTTP] server put: ' + req.url));
|
||||
|
||||
res.origin=req.headers.origin;
|
||||
|
||||
if (params.rpc != undefined &&
|
||||
params.rpc == 'trans' &&
|
||||
params.hostport != undefined &&
|
||||
params.tid != undefined) {
|
||||
Sch.ScheduleCallback([Sch.Bind(self,self.trans),self,params,req,res]);
|
||||
} else if (params.rpc != undefined &&
|
||||
params.rpc == 'reply' &&
|
||||
params.hostport != undefined &&
|
||||
params.tid != undefined) {
|
||||
Sch.ScheduleCallback([Sch.Bind(self,self.reply),self,params,req,res]);
|
||||
} else
|
||||
//res.
|
||||
self.send(res,'EINVALID');
|
||||
};
|
||||
|
||||
|
||||
Server.prototype.init = function () {
|
||||
var self = this;
|
||||
this.https = http.createServer(function(request, response) {
|
||||
//Io.inspect(request);
|
||||
String.match(request.method,[
|
||||
['GET',function() {
|
||||
self.get(self,request,response);
|
||||
}],
|
||||
['POST',function() {
|
||||
self.put(self,request,response);
|
||||
}]
|
||||
])
|
||||
});
|
||||
this.https.on("connection", function (socket) {
|
||||
socket.setNoDelay(true);
|
||||
});
|
||||
this.https.on("error", function (er) {
|
||||
Io.out('[BTTP] listen: listening on * ' + self.srv_ipport+' failed: '+er);
|
||||
});
|
||||
this.router.add_conn(self.rpccon);
|
||||
};
|
||||
|
||||
/**
|
||||
*
|
||||
* @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, 'Broker Client Service and Garbage Collector', function (context) {
|
||||
Io.log(((log+self.verbose)<4)||('[BTTP] Client Service and Garbage Collector'));
|
||||
if (!self.lock) {
|
||||
self.lock = true;
|
||||
|
||||
self.client_queue = Array.filter(self.client_queue, function (client) {
|
||||
var msgn=0;
|
||||
var body='';
|
||||
var trans,hdr,buf;
|
||||
client.timeout=client.timeout-interval;
|
||||
Io.log((self.router.monitor < 2) || ('[BTTP] GC for host ' + Net.Print.port(client.hostport)+
|
||||
' #trans='+ Array.length(self.router.trans_queue)+' #lookup='+Array.length(self.router.lookup_queue)));
|
||||
do {
|
||||
trans = self.router.lookup_trans_for_host(client.hostport);
|
||||
Io.log(((log+self.verbose)<10)||('[BTTP] GC: lookup_trans_for_host=' + util.inspect(trans)));
|
||||
if (trans != undefined) {
|
||||
Io.log(((log+self.verbose)<1)||('[BTTP] GC: found trans=' + Rpc.Print.rpcio(trans)));
|
||||
|
||||
if (trans.operation == Rpc.Operation.TRANSREQ) {
|
||||
body = body + trans.to_xml('rpc');
|
||||
msgn++;
|
||||
|
||||
} else if (trans.operation == Rpc.Operation.TRANSREP) {
|
||||
// Transaction reply!
|
||||
body = body + trans.to_xml('rpc');
|
||||
msgn++;
|
||||
}
|
||||
}
|
||||
} while (trans != undefined);
|
||||
// Add all pending server port LOOKUP requests...
|
||||
for (var i in self.router.lookup_queue) {
|
||||
var lookup = self.router.lookup_queue[i];
|
||||
// TODO: should we retransmit lookup requests here?
|
||||
var cache = self.router.lookup_cache[i];
|
||||
if (cache[client.hostport]==undefined) {
|
||||
cache[client.hostport] = 1;
|
||||
buf = Buf.Buffer();
|
||||
Buf.buf_put_port(buf, lookup.header.h_port);
|
||||
body = body + '<rpc operation="LOOKUP" hostport="' + Net.port_to_str(self.hostport) + '">' +
|
||||
Buf.buf_to_hex(buf) + '</rpc>';
|
||||
msgn++;
|
||||
}
|
||||
}
|
||||
if (msgn>0) {
|
||||
body = '<xml>' + body + '</xml>';
|
||||
self.send(client.respond,body);
|
||||
return false;
|
||||
} else if (client.timeout<=0) {
|
||||
body = 'ENOENTR';
|
||||
self.send(client.respond,body);
|
||||
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('[BTTP] listen: listening on *:' + self.srv_ipport);
|
||||
});
|
||||
};
|
||||
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.hostport,options.srv_ip,options.srv_ipport,
|
||||
options.router,options.verbose,options.env);
|
||||
Object.preventExtensions(obj);
|
||||
return obj;
|
||||
}
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user