+//
+// CLASS transport_xhr
+//
+function transport_xhr(doc, xynt_streaming, page)
+{
+ this.doc = doc;
+ this.xynt_streaming = xynt_streaming;
+ this.xhr = createXMLHttpRequest();
+ this.xhr.open('GET', page);
+
+ var self = this;
+ this.xhr.onreadystatechange = function () { self.xhr_cb(); };
+ this.xhr.send(null);
+
+ this.stopped = false;
+}
+
+transport_xhr.prototype = {
+ doc: null,
+ xynt_streaming: "ready",
+ xhr: null,
+ stopped: true,
+
+ ctx_old: "",
+ ctx_old_len: 0,
+ ctx_new: null,
+
+ // script_clean: 0,
+
+ destroy: function () { /* public */
+ if (this.xhr != null) {
+ this.xhr_abort();
+ }
+ delete this.xhr;
+ },
+
+ xhr_cb: function () {
+ var ret;
+
+ if (this.xhr.readyState == 4) {
+ // console.log("SS: "+safestatus(xhr));
+
+ // NOTE: delay management later
+ // 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() {
+ if (this.xhr != null) {
+ this.xhr.abort();
+ }
+ },
+
+ xstr_is_init: function () { /* public */
+ try {
+ if (this.xhr.responseText != null) {
+ this.ctx_new = this.xhr.responseText;
+ }
+ }
+ catch (e) {
+ }
+
+ return (this.ctx_new != null);
+ },
+
+ /* only after a successfull is_initialized call */
+ xstr_is_ready: function () { /* public */
+ return (this.xynt_streaming == "ready");
+ },
+
+ xstr_set: function () { /* public */
+ // already set
+ },
+
+ ctx_new_is_set: function () { /* public */
+ return (this.ctx_new != null);
+ },
+
+ ctx_new_curlen_get: function () { /* public */
+ return (this.ctx_new.length);
+ },
+
+ ctx_new_getchar: function(idx) { /* public */
+ },
+
+ ctx_old_len_is_set: function () { /* public */
+ return (true);
+ },
+
+ ctx_old_len_get: function () { /* public */
+ return (this.ctx_old_len);
+ },
+
+ ctx_old_len_set: function (len) { /* public */
+ this.ctx_old_len = len;
+ },
+
+ ctx_old_len_add: function (len) { /* public */
+ this.ctx_old_len += len;
+ },
+
+ new_part: function () { /* public */
+ return (this.ctx_new.substr(this.ctx_old_len));
+ },
+
+ scrcls_set: function (step) { /* public */
+ // this.script_clean = step;
+ },
+
+ postproc: function () {
+ if (this.stopped && !this.xstr_is_ready()) {
+ this.xynt_streaming.reload();
+ }
+ }
+}
+