To get some diagnostics for our MVC4 application (with an WebRole for Microsoft Azure) we installed Glimpse through NuGet.
Everything went fine, but when I enable Glimpse through the ~/Glimpse.axd page our application is completely unreachable. On every request we get the message "This Webpage is not available" (Chrome).
In the output window in Visual Studio 2013 I saw an error message which suggests to disable async support through the web.config:
<appSettings>
<add key="Glimpse:DisableAsyncSupport" value="true"/>
</appSettings>
Unfortunately this is not helping. When we turn off Glimpse everything is just fine.
How can I find out what the problem is?
Update
The logs shows me this warning:
WARN | Unable to locate '</body>' with content encoding 'Unicode (UTF-8)' for request. The response may be compressed or the markup may actually be missing a '</body>' tag.
Found my solution on the troubleshooting page of Glimpse.
In short, url compression was applied so had to disable this in the web.config:
<system.webServer>
<urlCompression doDynamicCompression="true" dynamicCompressionBeforeCache="false" />
</system.webServer>
Related
I have an ASPNET Core project that is running a set of RESTful services using C# and Newtonsoft.JSON 11.0.2 which I incorporated using NuGet. When I run everything locally using Visual Studio 2017 and IIS Express, things work fine and my JSON Deserializer efforts work with no issue.
When I publish the solution in a Web Deploy package and then install that application in IIS 10 on a Windows Server 2016 instance in AWS, the deserializer fails. The error is:
Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0
It does not matter if I publish in Debug or Release mode.
I ran Postman calls and the JSON being returned is both validate and produces the correct objects. I did see that, in the Solution Explorer, the version is 11.0.2 but in the assets JSON file, the version is pointed to 10.0.1. The .CS project file, when viewed in a text editor outside of Visual Studio, does show 11.0.2.
When I look in the deployed application's folder on the server, I do not see any NewtonSoft DLLs but I do see other NuGet-obtained DLLs. This might not be an issue given how JSON.NET deploys but I thought it was worth mentioning.
I then included a logger and sent the incoming JSON to a file and, again, it all validated as expected.
I have tried everything, ensured CORS is properly implemented both in the application and in IIS. I am at a complete loss as to how to proceed.
Can somebody please help?
Thank you!
I had the same problem and solved by this code in web.config
<system.webServer>
<handlers>
<remove name="WebDAV" />
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<remove name="OPTIONSVerbHandler" />
<remove name="TRACEVerbHandler" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
<modules>
<remove name="WebDAVModule" />
</modules>
</system.webServer>
I sometimes browse old question that has no/accepted answers and check if they are still in need of some help, or if something can be done to close the cold case.
This post has already been solved, but the cause and the solution were left only in the comments.
If the first character encountered when parsing is <, you can be sure
that is not JSON. Something is probably sending XML or HTML to your
code in the deployed environment. I would look at that angle. This
doesn't seem like a version conflict to me, otherwise you would be
getting a much different error about not being able to load the file
or assembly. I think this is solely a data problem.
Brian Rogers
#Brian Rogers - Thank you SO MUCH for this last comment. I ended up
opening Production to my development machine and then running
Wireshark to see the communications. Turns out that IIS had "GEWT"
instead of "GET" in the allowed methods web.config for the host
website and I was getting rejections in the cloud instead of the JSON.
Every test I ran which generated output was LocalHost but, of course,
none of the real production work used anything local. Once I fixed
that error, everything worked great!
Ken Tola
#ken-tola, can you please self-answer the question and then accept it to close the case.
I have an ASP .Net Core 2.1 Web API which I've deployed to a new server we recently purchased (running Windows Server 2016 Standard). The API works perfectly on both my development PC and our old server (running Windows Server 2012 R2). But on this new server, I get this error:
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.
I remember a year ago also struggling a lot trying to get it to run on our old server. I did eventually get it to work, but I can't remember what I did! Is there any way to get more information on this error? I've checked the Windows Event Viewer on the new server and there is nothing there. Also, although I've got stdoutLogEnabled="true" in my web.config, it's not generating the log - and I've created the \logs\stdout path so the folders do exist...
I've also got app.UseDeveloperExceptionPage(); in my Startup.cs, but I'm not getting any more info that a simple 500 internal server error.
This is what my web.config looks like:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<location path="." inheritInChildApplications="false">
<system.webServer>
<handlers>
<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified" />
</handlers>
<aspNetCore processPath="dotnet" arguments=".\PropWorx.API.dll" stdoutLogEnabled="true" stdoutLogFile=".\logs\stdout" />
</system.webServer>
</location>
</configuration>
<!--ProjectGuid: cfa62a1f-c5f6-43f8-bcbe-04068e40b803-->
I've also got the Microsoft .NET Core 2.1.1 - Windows Server Hosting installed and the Microsoft .NET Core Runtime - 2.1.1 installed (both x86 and x64).
Like I said it works on my development PC and on our old server, so it must be a configuration issue on the new server. Is there a way I can get more detailed error information other than just 500 Internal Server Error?
I had an outdated version of the .NET Core Windows Server Hosting bundle. I had version 2.1.1 installed. I removed it, and installed version 2.1.4 and now it works.
Various reasons can cause this issue.
if this is happening only in the browser (working with curl or postman), it can be a pre-flight request error, then you will need to modify UrlScan.ini (I assume this didn't changed on Windows 2016) at the following path (C:\Windows\System32\inetsrv\urlscan), add OPTIONS to [AllowVerbs].
if not, make sure you followed the steps provided in Microsoft documentation:
https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/?view=aspnetcore-2.1&tabs=aspnetcore2x
You may need to install Visual C++ 2015 Redistributable on the server
To get logs, change "IncludeScopes": true, in your appsettings.json logging section, check also the event viewer.
I am trying to use mini profiler with WCF.
I keep getting a 404 error:
http://website/mini-profiler-resources/results
There are no results being returned.
I am using two versions of the mini profiler. The NUGET version which doesn't include support for WCF works just fine.
I downloaded the git version so that I can use the WCF integration.
I note that if I run the test project included in the sources 'Sample.Mvc' the same error occurs when the home page is executed, but not for some of the links. I cannot seem to get results for any of my own web site pages. The same 404 occurs.
I have downloaded the master version. I am using .NET 4.0 and studio 2010.
I have the following in the config file, I have tried with and without the handlers.
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<modules runAllManagedModulesForAllRequests="true" />
<handlers>
<add name="MiniProfiler" path="mini-profiler-resources/*" verb="*" type="System.Web.Routing.UrlRoutingModule" resourceType="Unspecified" preCondition="integratedMode" />
</handlers>
</system.webServer>
I am definitely calling the start and stop methods.
StackExchange.Profiling.MiniProfiler.Stop();
I have read this: MvcMiniProfiler results request giving 404 in Asp.Net MVC app
It did not help.
I have found a clue as to the problem
The following code in miniprofiler is returning NotFound
The profiler is expecting some kind of guid value to be present, and it isn't.
private static string Results(HttpContext context) {
// this guid is the MiniProfiler.Id property
Guid id;
if (!Guid.TryParse(context.Request["id"], out id))
return isPopup ? NotFound(context) : NotFound(context, "text/plain", "No Guid id specified on the query string");
temporary fix
I took out the code above, and just collected the first guid out of storage, and this fixed the problem. I think this code needs cleaning up. I need to learn GIT, and then try and clean it up myself.
var id = MiniProfiler.Settings.Storage.List(10).FirstOrDefault();
Can you see .../mini-profiler-resources/results-index ?
Handler not required btw. There is a comma in your link but assume that is just a question typo.
Are you calling start last thing in the Application_BeginRequest() and stop in Application_EndRequest()
Have you set GlobalFilters.Filters.Add(new ProfilingActionFilter());?
and are you using WebActivator with a MiniProfilerPackage and MiniProfilerStartupModule
Think I need to tidy up my own implementation as looks like I have some unnecessary cruft.
I'm currently struggling with httphandlers in IIS.
I'm developing a website in .NET4 in VS2010 and Cassini. In this website, i have a gallery, whose pictures are loaded through my handler.
For example http://mywebsite.com/Gallery/123/Pic1.jpg
My HTTP Handler gets the id 123 and returns the picture from the database (simplified).
So, everything works fine in Cassini (VS integrated webserver) and in IIS7 in "integrated mode". Pictures are loaded like they should.
But I have to deploy this site on a shared hoster, who is using IIS6.
After many searching and own logging, I found out, the the request isn't routed to my handler, and so I get a 404 from IIS.
My definition which is enough for IIS7 integrated mode:
<system.web>
<handlers>
<add verb="*" path="Gallery/*/*" type="[coorect Type spec]" />
</handlers>
</system.web>
For IIS7 in classic mode I had to add
<system.webServer>
<handlers>
<add name="ImageHandler" verb="*" path="Galler</*/*" type="[type]" modules="IsapiModule" scriptProcessor="c:\windows\Microsoft.net\framework\v4.0.30319\aspnet_isapi.dll"/>
</handlers
</system.webServer>
This last config only works whith the stuff in the module and scriptprocessor attributes...
But this config doesn't work in IIS6....
Can anyone help me ?
The issue is that IIS6 typically decides what ISAPI handler to pass the request to by using the file extension. So it sees .jpg and tries to serve a static file from that path. This is also what IIS7 refers to as classic mode. And you'll note you are referencing aspnet_isapi.dll in your configuration because it needs to be told what should handle this. Once you've passed it into aspnet_isapi, the asp.net http handling pipeline kicks in and you can execute your handler.
The easiest fix would be to find a host that supports IIS7. Failing that, you could see if they have any url rewriting options. With that, you could rewrite things so that you append an .ashx on the url, which will let IIS6 grab it and put it into the asp.net pipeline and your handler would fire. You could also see if they allow wildcard mappings, but that is a very tall order for most shared hosts.
I have deployed a few WCF services to a server via a web setup project
they are being hosted in an IIS Application, which appears to be running fine.
However when i try to navigate to the wsdl, nothing is found.
I am trying to set up diagnostics logging, to get some information.
I have followed the advice from here: wcf trying to set up tracing to debug, not writing to log file
Also, I have tried what is in the referenced MSDN documentation: under "Recommended Settings for Deployment or Debugging" .. my web.config has that identical configuration. But no log file is being created.
Nothing useful in the event viewer.
Any ideas?
Could be a permissions issue; IIRC those don't always turn up in the event log. Ensure the user IIS runs under has write permissions to the log file path.
This is typically the diagnostic config I use. Seems to work for me.
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
...
<system.diagnostics>
<trace autoflush="true" />
<sources>
<source name="System.ServiceModel"
switchValue="Verbose">
<listeners>
<add name="sdt"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData="D:\wcfLog.svcLog" />
</listeners>
</source>
</sources>
</system.diagnostics>
</configuration>
If you are not getting any output it may be because your service is not starting correctly. The ServiceHost must be up for diagnostics to output anything. With IIS even though your site is running it does not mean that the ServiceHost started correctly. It's usually a config issue. I'm not a web guy but doesn't IIS write to EventViewer if there is an unhandled exception in the website?
Also, you could try creating a custom ServiceHostFactory. That way your code controls the ServiceHost creation and you can trap any exceptions and log them on your own.
Creating a custom ServiceHost in IIS -> LINK
This is an old question but for the benefit of anyone who might stumble upon the issue:
Make sure you have configured both the system.diagnostics and the System.serviceModel/diagnostics sections configured.
Make sure you have them configured in the correct App.config/Web.config file. The thing to note is that multiple config files may exist in a project, and the one used depends on the Build Configuration.
Personally I had the very same symptom until I noticed that I put the sections
under app.config (in my case, client side tracing), instead of
app.DebugLocal.config. The later was used as my build configuration was set to DebugLocal.