We are seeing some differences in the requests and responses that come back from our application when upgrading from the 10.1.1 WPF SDK to the 10.2 WPF SDK. Both instances are hitting a public facing ArcGIS Server running at 10.1. Nothing else changed in the environment between the 2 applications, does anyone have any recommendations as to where to look to figure out the source of this problem? Looking at the requests in Fiddler, it looks like the new If-Range in the http header may be contributing to the problem.
More info - Here's the error log from the same machine throwing the error
[INDENT]Log Entry : 12/4/2013 3:05:55 PM Request failed http://server.arcfmsolution.com/arcgis/rest/services/GasDistribution/MapServer?f=json :This header must be modified using the appropriate property. Parameter name: name : at System.Net.WebHeaderCollection.ThrowOnRestrictedHeader(String headerName) at System.Net.WebHeaderCollection.Set(String name, String value) at ESRI.ArcGIS.WebAdaptor.AGSHandler.TransferRequestHeaders(HttpWebRequest req, HttpRequest srcRequest) at ESRI.ArcGIS.WebAdaptor.AGSHandler.SendRedirectRequest(HttpRequest srcRequest, String url, Boolean rewriteUrlsInResponse) at ESRI.ArcGIS.WebAdaptor.AGSHandler.TransferRequest(HttpContext context) at ESRI.ArcGIS.WebAdaptor.AGSHandler.ProcessRequest(HttpContext context)[/INDENT]
My pet theory is that the 10.1 web adapter barfs when it tries to copy the headers from the 10.2 SDK request to forward it to <server>:<port>. IF and RANGE headers are restricted in webRequest.Headers.Add...
The issue is coming from a bug in ArcGIS WebAdaptor which doens't transfert correctly the range headers ending by '-'. The issue has been fixed in the version 10.2.1 of WebAdaptor.
Out of the upgrade to 10.2.1, the workaround may be to disable the cache at client side with init code like:
ArcGISWebClient.DefaultCachePolicy = new System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.NoCacheNoStore);
But this will decrease the performances so consider it as a temporarly workaround.
