I have a user who is intermittently receiving an HTTP 405 when clicking a link within my application. There is nothing funny about the link, as far as I can see...
<a id="ctl00_ctlNavigationMenu_viewTransfersLink" href="Navigate.ashx?target=6">- View Transfers</a>
As I said, most of the time the link executes successfully. However, very ocassionally the user has been met with:
405 - HTTP verb used to access this page is not allowed.
When I inspect the IIS log, I can see the following entry:
2009-02-04 15:12:50 192.168.202.204 2GET /Navigate.ashx target=6 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 13203
This seems to be reporting that the user's browser has submitted a request using the verb 2GET. How can this be?
Looking through the log on our test server, I can see a few other instances of this problem:
2008-11-06 13:30:10 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 109
2008-11-06 13:31:44 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 62
2008-11-06 13:37:20 192.168.202.204 2GET /Content/Css/datepicker.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 109
2008-11-06 14:06:00 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 125
2008-11-06 16:30:42 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 406
2008-11-07 11:01:07 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 406
2008-11-10 11:27:31 192.168.202.204 2GET /Content/Css/origo_advanced_horiz.css - 80 - 192.168.202.190 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322) 405 0 1 46
2009-02-03 12:00:38 192.168.202.204 2GET /Navigate.ashx target=6 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 13438
2009-02-03 12:00:49 192.168.202.204 2GET /Navigate.ashx target=6 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 1593
2009-02-04 15:12:50 192.168.202.204 2GET /Navigate.ashx target=6 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 13203
We're running on IIS7.
Any ideas? Does 2GET exist as a verb? Can it be related to the UpdatePanel on my form?
Sandy
UPDATE: I'm getting all kinds of odd verbs: 2GET, 9GET, 1POST, 5POST...
2009-02-04 15:12:50 192.168.202.204 2GET /Navigate.ashx target=6 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 13203
2009-02-04 15:28:12 192.168.202.204 1POST /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 3171
2009-02-04 15:28:28 192.168.202.204 5POST /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 2515
2009-02-04 15:34:21 192.168.202.204 5POST /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 1828
2009-02-04 15:44:52 192.168.202.204 2GET /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 5390
2009-02-04 16:15:23 192.168.202.204 2POST /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 7781
2009-02-04 16:16:04 192.168.202.204 2GET /Navigate.ashx target=3 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 44938
2009-02-04 16:16:09 192.168.202.204 2GET /Navigate.ashx target=3 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 45876
2009-02-04 16:16:27 192.168.202.204 2GET /Content/Css/reset.css - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 4687
2009-02-04 16:16:52 192.168.202.204 9GET /Transfer/View.aspx - 80 - 192.168.202.141 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+InfoPath.2;+.NET+CLR+2.0.50727) 405 0 1 5468