--- /dev/null
+/*
+ * brisk - http_streaming.js
+ *
+ * Copyright (C) 2006-2011 Matteo Nastasi
+ * mailto: nastasi@alternativeoutput.it
+ * matteo.nastasi@milug.org
+ * web: http://www.alternativeoutput.it
+ *
+ * This program 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABLILITY 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 this program; if
+ * not, write to the Free Software Foundation, Inc, 59 Temple Place -
+ * Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * TODO:
+ *
+ * MANDATORY
+ *
+ * NOT MANDATORY
+ * - gst management
+ * - sandbox management
+ * - myfrom into the constructor
+ * - target page into the constructor
+ * - type of streaming into the constructor
+ * - all iframe related streaming add
+ * - substitute fixed "eval" with a generic command hunks processor
+ *
+ * DONE - xhr_rd prefix remove from inner class attrs
+ * DONE - move hbit implementation to external file
+ *
+ */
+
+function http_streaming(cookiename)
+{
+ this.xhr = createXMLHttpRequest();
+ // this.xhr.setRequestHeader("Content-type", "text/html; charset=utf-8");
+ this.cookiename = cookiename;
+}
+
+http_streaming.prototype = {
+ cookiename: null,
+ cookiepath: "/brisk/",
+ xhr: null,
+ watchdog: null,
+ delay: 0,
+ delayed: null,
+ stopped: true,
+ the_end: false,
+ oldctx: "",
+ newctx: "",
+ cur_n: -1,
+ old_n: -1,
+ checkedlen: 0,
+ /* watchdog_old: 0, */
+ ct: 0,
+
+ hbit: function () {
+ },
+
+ hbit_set: function (hbit) {
+ this.hbit = hbit;
+ },
+
+ xhr_cb: function () {
+ var ret;
+
+ if (this.xhr.readyState == 4) {
+ if (this.watchdog != null) {
+ this.hbit('C');
+ clearTimeout(this.watchdog);
+ this.watchdog = null;
+ }
+
+ // console.log("SS: "+safestatus(xhr));
+
+ try {
+ if ((ret = safestatus(this.xhr)) == 200) {
+ this.delay = 0;
+ // console.log("del a null "+this.delayed);
+ } else if (ret != -1) {
+ this.delay = 5000;
+ this.hbit('X');
+ // alert('There was a problem with the request.' + ret);
+ }
+ } catch(b) {};
+
+ this.delayed = null;
+ this.stopped = true;
+ }
+ },
+
+ xhr_abort: function()
+ {
+ this.hbit('A');
+ if (this.xhr != null)
+ this.xhr.abort();
+ // alert("de che");
+ },
+
+ run: function(sess, stat, subst, step)
+ {
+ if (this.the_end) {
+ //x alert("the_end1");
+ if (this.watchdog != null) {
+ this.hbit('C');
+ clearTimeout(this.watchdog);
+ this.watchdog = null;
+ }
+ return;
+ }
+ createCookie(this.cookie_name, sess, 24*365, this.cookiepath);
+
+ // NOTE: *ctx = "" to prevent konqueror stream commands duplication.
+ this.oldctx = "";
+ this.newctx = "";
+
+ /* NOTE document.uniqueID exists only under IE */
+ // if (g_is_spawn == 1)
+ // alert("di qui3: "+(g_is_spawn == 1 ? "&table_idx="+g_table_idx : ""));
+ this.xhr.open('GET', 'index_rd.php?sess='+sess+"&stat="+stat+"&subst="+subst+"&step="+step+"&onlyone="+(document.uniqueID ? "TRUE" : "FALSE")+"&myfrom="+myfrom, true);
+ // try {
+
+ var self = this;
+ this.xhr.onreadystatechange = function () { self.xhr_cb(); };
+ this.xhr.send(null);
+ //
+ // TODO: qui avvio del timer per riavviare xhr
+ //
+ this.watchdog = setTimeout(function(obj){ obj.xhr_abort(); }, 60000, this);
+ this.cur_n++;
+ this.stopped = false;
+ // } catch (e) {}
+ },
+
+ /* WORK HERE TO RUN WIN OR LIN STREAM */
+
+ start: function(sess)
+ {
+ this.poll(sess);
+ },
+
+ stop: function()
+ {
+ this.the_end = true;
+ },
+
+ poll: function(sess)
+ {
+ var tout = 100;
+ var again;
+ var xhrrestart;
+
+ this.ct++;
+
+ /*
+ if (this.watchdog_old >= 50) {
+ this.watchdog_old = 0;
+ // alert("ABORT XHR");
+ this.stopped = true;
+ this.xhr.abort();
+ }
+ */
+ var zug = "POLL sess = "+sess+" stat = "+stat+" subst = "+subst+" step = "+gst.st+" step_loc = "+gst.st_loc+" step_loc_new = "+gst.st_loc_new+" STOP: "+this.stopped;
+
+ if (zug != $("sandbox").innerHTML)
+ $("sandbox").innerHTML = zug;
+
+ /* heartbit log */
+ this.hbit("_");
+ do {
+ again = 0;
+ xhrrestart = 0;
+ if (gst.st_loc < gst.st_loc_new) {
+ // there is some slow actions running
+ break;
+ }
+ else if (gst.comms.length > 0) {
+ var singlecomm;
+
+ singlecomm = gst.comms.shift();
+ // alert("EXE"+gugu);
+ // $("xhrdeltalog").innerHTML = "EVALL: "+singlecomm.replace("<", "<", "g"); +"<br>";
+ this.hbit("+");
+
+ eval(singlecomm);
+ again = 1;
+ }
+ else {
+ xhrrestart = 1;
+ try {
+ if (this.xhr == null)
+ throw "restart";
+ if (this.xhr.responseText != null)
+ this.newctx = this.xhr.responseText;
+ }
+ catch (e) {
+ if (this.stopped == true) {
+ this.stopped = false;
+ // XX $("xhrstart").innerHTML += "XHRSTART: da catch<br>";
+ if (this.delay > 0) {
+ if (this.delayed == null) {
+ // console.log("XXX DI QUI "+this.delay);
+
+ this.delayed = setTimeout(
+ function(f_obj, f_sess, f_stat, f_subst, f_step){ f_obj.run(f_sess, f_stat, f_subst, f_step); },
+ this.delay, this, sess, stat, subst, gst.st);
+ // console.log("XXX DI QUI post"+this.delayed);
+ }
+ }
+ else {
+ // console.log("yyy DI QUI "+this.delay);
+ this.run(sess, stat, subst, gst.st);
+ }
+ }
+
+
+ // $("sandbox").innerHTML += "return 1<br>";
+ if (this.the_end != true) {
+ /* this.watchdog_old = 0; */
+ setTimeout(function(obj, sess){ obj.poll(sess); }, tout, this, sess);
+
+ // this.hbit(".");
+
+ }
+ else {
+ //x alert("the_end2");
+ if (this.watchdog != null) {
+ clearTimeout(this.watchdog);
+ this.watchdog = null;
+ }
+ }
+ return;
+ }
+
+
+ // no new char from the last loop, break
+ if (this.old_n == this.cur_n &&
+ this.newctx.length == this.checkedlen) {
+ /* this.watchdog++; */
+ break;
+ }
+ else {
+ // $("sandbox").innerHTML += "BIG IF<br>";
+ var comm_match;
+ var comm_clean;
+ var comm_len;
+ var comm_newpart;
+ var comm_arr;
+ var i;
+ var delta = 0;
+ var match_lines = /^_*$/;
+
+ /* this.watchdog = 0; */
+ this.hbit("/\\");
+
+ // check for the same command group
+ if (this.old_n != this.cur_n) {
+ this.old_n = this.cur_n;
+ this.checkedlen = 0;
+ this.oldctx = "";
+ }
+ else
+ delta = this.oldctx.length;
+
+ // $("xhrlog").innerHTML += "EVERY SEC<br>";
+ for (i = delta ; i < this.newctx.length ; i++) {
+ if (this.newctx[i] != '_')
+ break;
+ }
+ if (i == this.newctx.length) {
+ this.checkedlen = i;
+ break;
+ }
+
+ // $("xhrlog").innerHTML += "CHECK COM<br>";
+ // extracts the new part of the command string
+ comm_newpart = this.newctx.substr(delta);
+
+ // XX $("xhrlog").innerHTML = newctx.replace("<", "<", "g");
+
+ // $("response").innerHTML = comm_newpart;
+ comm_match = /_*@BEGIN@(.*?)@END@/g;
+ comm_clean = /_*@BEGIN@(.*?)@END@/;
+ comm_len = 0;
+ comm_arr = comm_newpart.match(comm_match);
+
+ // $("sandbox").innerHTML += "PRE COMMARR<br>";
+ if (comm_arr) {
+ // XX $("xhrdeltalog").innerHTML += "DELTA: "+delta +"<br>";
+ // XX alert("newctx: "+this.newctx);
+ // $("sandbox").innerHTML += "POST COMMARR<br>";
+ for (i = 0 ; i < comm_arr.length ; i++) {
+ var temp = comm_arr[i].replace(comm_clean,"$1").split("|");
+ gst.comms = gst.comms.concat(temp);
+ // XX alert("COMM_ARR["+i+"]: "+comm_arr[i]+" LEN:"+comm_arr[i].length);
+ comm_len += comm_arr[i].length;
+ }
+ tout = 0;
+ this.oldctx += comm_newpart.substr(0,comm_len);
+ // XX alert("OLDCTX: "+this.oldctx);
+ again = 1;
+ }
+ this.checkedlen = this.oldctx.length;
+ }
+ }
+ } while (again);
+
+ if (xhrrestart == 1 && this.stopped == true) {
+ // $("sandbox").innerHTML += "LITTLE IF<br>";
+ // alert("di qui");
+ // XX $("xhrstart").innerHTML += "XHRSTART: da end poll<br>";
+ if (this.delay > 0) {
+ if (this.delayed == null) {
+ // console.log("XXX DI QUO "+this.delay);
+
+ this.delayed = setTimeout(
+ function(obj, sess, stat, subst, step){ obj.run(sess, stat, subst, step); },
+ this.delay, this, sess, stat, subst, gst.st);
+ // console.log("XXX DI QUO post"+this.delayed);
+ }
+ }
+ else {
+ // console.log("yyy DI QUO "+this.delay);
+ this.run(sess, stat, subst, gst.st);
+ }
+
+ }
+
+ if (this.the_end != true) {
+ setTimeout(function(obj, sess){ obj.poll(sess); }, tout, this, sess);
+ }
+ else {
+ //x alert("the_end3");
+ if (this.watchdog != null) {
+ clearTimeout(this.watchdog);
+ this.watchdog = null;
+ }
+ }
+ return;
+ }
+}
+
+/*
+ window.onload = function () {
+ xhr = createXMLHttpRequest();
+
+ sess = $("user").value;
+ window.setTimeout(poll, 0, sess);
+ };
+*/
projects / brisk.git / blobdiff