[Pkg-javascript-commits] [sockjs-client] 18/350: Slightly increase the value of the retransmission timeout

[tonnerre at ancient-solutions.com]

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tonnerre-guest pushed a commit to branch upstream
in repository sockjs-client.

commit a12275e671632f53edd8017c4b59c41065c4cb51
Author: Luigi Pinca <luigipinca at gmail.com>
Date:   Tue Mar 25 12:43:13 2014 +0100

    Slightly increase the value of the retransmission timeout
---
 lib/utils.js | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index 7efed84..3c7ecf8 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -86,14 +86,15 @@ utils.userSetCode = function (code) {
 // See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/
 // and RFC 2988.
 utils.countRTO = function (rtt) {
-    var rto;
-    if (rtt > 100) {
-        rto = 3 * rtt; // rto > 300msec
-    } else {
-        rto = rtt + 200; // 200msec < rto <= 300msec
-    }
-    return rto;
-}
+    // In a local environment, when using IE8/9 and the `jsonp-polling`
+    // transport the time needed to establish a connection (the time that pass
+    // from the opening of the transport to the call of `_dispatchOpen`) is
+    // around 200msec (the lower bound used in the article above) and this
+    // causes spurious timeouts. For this reason we calculate a value slightly
+    // larger than that used in the article.
+    if (rtt > 100) return 4 * rtt; // rto > 400msec
+    return 300 + rtt;              // 300msec < rto <= 400msec
+};
 
 utils.log = function() {
     if (_window.console && console.log && console.log.apply) {

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