So I'm trying to iterate over Response.Headers for a custom caching job, but I'm getting the following error when I touch the thing:
This operation requires IIS integrated pipeline mode
It this possible to do in IIS6? Is there a workaround?
var allHeaders = HttpContext.Current.Response.Headers;
// error thrown as soon as it's accessed
AFAIK you cannot access the HTTP response headers unless you are running in integrated mode because they are sent by the server at a later stage of the execution of the request when running in standard mode.
Related
I have a .Net 4.5.2 WebApp that is calling my API. When I point my web app to the LocalHost version of my API, it gets the data, and comes back just fine. I published that API, and confirm that the API is working correctly with PostMan.
Then I run the exact same WebApp code, changing only the URI from localhost to live api, and I get a multiple exception error consisting of the following:
An existing connection was forcibly closed by the remote host
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
The underlying connection was closed: An unexpected error occurred on a send.
An error occurred while sending the request.
Here's my calling code
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Add("user", serializedUser);
response = null;
try
{
//Uri uri = new Uri("https://jsonplaceholder.typicode.com/posts/1");//https works
Uri uri = new Uri("https://api.acme.com/values/test");
//Uri uri = new Uri("http://localhost/5000/values/test"); //http localhost works
response = client.GetAsync(uri).Result;
}
catch (Exception e)
{
string er = e.Message;
}
}
EDIT 1: I created a .NET Core app from scratch, and my original code works perfectly calling my live API. My original code also work in .NET 4.5.2 calling a different "https" API.
EDIT 2:
So this is where I'm at now, I have created two generic apps from VS 2015, one is a .NET Core Web App, the other a .NET Framework Web App. I have used the above code exactly the same in both apps to call the API. In both apps, I can call a generic "https" api I found online (jsonplaceholder). I can also call the localhost version of my app at "http" from both. In the .NET Core version of the app, I can call my "https" live API and get the results I'm looking for. In the .NET Framework app I still get the same errors.
I can't figure out what the difference is between my Core and Framework requests that is getting one shut down when the other isn't.
It seems you are hosting the application on secured http environment (https). Are you using SSL certificate on the server where you are hosting your Web API? If not, It might be throwing the certificate related exceptions.
Just add the following line before the call to GetAsync and This will ignore the SSL errors.
ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
This is only recommended in an intranet environment or other closed network where server identities can't be forged.
C# Ignore certificate errors?
Adding the following line before my API call fixed the issue, but I'd love to hear an explanation of what this line does, and any security risks this might impose using it in my web app.
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
Props to this answer!
I have a Windows 8.1 Store application that I side-load on a Windows 10 Enterprise DELL tablet. The app uses data from a repository via an ASP.NET Web API installed on a remote server. The Web API is configured to use Windows Authentication. If I use Fiddler to make Web API calls I can see the several steps in the NTLM negotiation, the 401.2 HTTP Error messages returned twice before the HTTP 200 Ok.
However, my application gets the 401.1 and then it does not do anything else. In my application's package manifest, I have checked Enterprise Authentication check box in the list of required capabilities. Also, when I tested it with the Visual Studio Simulator, on my development machine, the negotiation was done and the Web API responded properly to my calls.
In order to have the NTLM Negotiation done automatically in the background, I though all that needs to be done is to have an HttpClientHandler object constructed like this:
var webApiAuthClientHandler = new HttpClientHandler()
{
Credentials = CredentialCache.DefaultNetworkCredentials,
ClientCertificateOptions = ClientCertificateOption.Automatic
};
Then, this HttpClientHandler object would be passed in the constructor of the HttpClient object used to make the Web API calls:
var webApiHttpClient = new HttpClient(webApiAuthClientHandler)
{
BaseAddress = new Uri(_myWebApiUri, UriKind.Absolute),
Timeout = new TimeSpan(0, 0, 150)
};
What am I missing? How do I get my app to automatically negotiate the authentication in the background and have my GetAsync call return the needed HTTP Code 200?
Any suggestion would be highly appreciated.
TIA,
Eddie
I see your issue has been resolved in MSDN forum: https://social.msdn.microsoft.com/Forums/windowsapps/en-US/58620579-240d-49da-8538-cee5aff91a68/w81-sideloaded-windows-81-application-generates-an-exception-when-calling-methods-of-an-restful?forum=wpdevelop
So I post it here to help more visitors find the solution easily.
Thank you.
I've build a RESTful web service using NancyFX which I'm now trying to POST to from a separate domain. Of course when I do that, I see a failed OPTIONS message in the console because this is a Cross Site POST and I need to ensure that Nancy responds correctly to the OPTIONS message being sent by the browser. However, when I define a route in my Nancy module:
this.Options["/options/"] = _ => this.OptionsRequest();
private dynamic OptionsRequest()
{
return this.Response.AsJson(Request)
.WithHeader("Access-Control-Allow-Origin", "*")
.WithHeader("Access-Control-Allow-Methods", "POST")
.WithHeader("Access-Control-Allow-Headers", "Accept, Origin, Content-type");
}
The code never gets hit. I can set a breakpoint on the OptionsRequest() method in debugger and see that the code is never getting hit. However I can issue an OPTIONS request in postman, and the server returns a response (interestingly, it seems to return a response from all URIs, not just the /options/ route I've defined).
Is there a default Nancy OPTIONS behaviour I have to override in order to specify routes for OPTIONS, or is this something to do with the service being hosted in the Visual Studio Development Web Server (Casini)? I've tried everything I can think of and I'm still stumped as to why I can't define behaviour for this particular verb.
Turns out this was a bug in Nancy v0.17.1 (see https://github.com/NancyFx/Nancy/pull/1093). Upgrading to 0.18.0 fixed the issue and allowed my OPTIONS route to work correctly.
I have an ASP .NET webpage which calls an ASP.NET webservice existing on the same site. Both of them require integrated windows authentication.
I get the following error during invoke of the webservice method when I run my webpage:
"The request failed with HTTP status 401: Unauthorized. "
I have no clue why it is failing. Is there a way to know which authentication protocol is being used from the website to invoke the webservice method, and why it is failing?
EDIT : As suggested, I downloaded auth diagnostics, and monitored it when i ran my webpage. Following is result:
AcceptSecurityContext
Package=NTLM Result=0x0 ContextAttr=0x12001c UserName= ClientName= ServerName=Result=0x0(Fail: context has ASC_RET_NULL_SESSION flag)
Main process: Finished, 1 issue detected
Have you gone through the Microsoft Troubleshooting HTTP 401 errors article?
How is IIS configured? Is it set up to use anonymous or Windows Auth? Also, what context is the app pool using? Perhaps the web is running under a context that doesn't have permissions to hit the web service?
I am trying to build a proxy that would serve requests to an internal site (hiding the origin) but at the same time inspect the packets and asynchronously post-process them.
E.g. let's say all SOAP calls to http://www.foo.com will go to http://192.168.1.1, and at the same time be stored in a DB for post analysis. The internal server is a black box, so changing something on it is out of this question scope.
Anyway, I have configured ARR, with reverse proxy, made URL rewrite filter with wildcards, all works flawless. Then, I tried to add an managed HttpModule written in C#, and hooked to Application_BeginRequest and Application_EndRequest. I am able to access request headers, response headers on end request (app pool being in integrated mode) and even able to read response content from the outputstream by setting a filter on Response.Filter, that caches all writes in an additional memory stream.
The problem is that the moment I try to read (inside the module BeginRequest handler) the input stream from the request, ARR stays a while and throws a
HTTP Error 502.3 - Bad Gateway The
operation timed out Handler
ApplicationRequestRoutingHandler
Error Code 0x80072ee2
So it times out.
Looking with Failed Request Tracing I see:
MODULE_SET_RESPONSE_ERROR_STATUS
Warning
ModuleName="ApplicationRequestRouting",
Notification="EXECUTE_REQUEST_HANDLER",
HttpStatus="502", HttpReason="Bad
Gateway", HttpSubStatus="3",
ErrorCode="2147954402",
ConfigExceptionInfo=""
SET_RESPONSE_ERROR_DESCRIPTION Warning
ErrorDescription="The operation timed
out"
Now any similar posts on the net didn't helped as this isn't a timeout error (proxy has 120 seconds setting, page answers in under 100 ms), and the moment I comment the code of the handler that tries to read FORM data or InputStream data, everything works as a charm.
Even if I set the position of the inputstream to 0 after reading it, I still get timeouts.
If I read the input stream on EndRequest, it gets 0 bytes, even if it was a POST request. (which is clearly wrong)
Does ARR has a bug in the fact that I try to read an input stream before it tries to re-route it?
Things used: Windows Server 2008 R2
IIS 7.5 ARR v2 .Net Framework 3.5
module
Ideas?
Thanks
/Cosmin
If you can switch to .Net Framework 4, there is a solution for this.
After you are done with your BeginRequest/EndRequest in your HttpModule event handler, add a call to HttpRequest.InsertEntityBody.
/* BeginRequest event: Executes before request is processed */
private void Application_BeginRequest(Object source, EventArgs e)
{
HttpApplication application = (HttpApplication)source;
HttpRequest request = application.Context.Request;
// Do something with request
DoMyOwnRequestProcessing(request);
// After you finish, make sure IIS gets the entity body
// For example, Application Request Routing needs this
request.InsertEntityBody();
}
Take a look at this on MSDN: HttpRequest.InsertEntityBody.
I know this is a year old question, but I just went through the same thing and found a solution. So, I'm posting it here for anyone else that runs into this.
In my case I only saw the timeout issue with POST requests.
It appears that the 2.0/2.1 ARR assumes that the input stream will be at the start of the posted data. However, the following code (for example) will break this assumption:
HttpContext context = HttpContext.Current;
HttpRequest request = context.Request;
string value = request.Params["Name"];
The key is how Params is described
Gets a combined collection of System.Web.HttpRequest.QueryString,
System.Web.HttpRequest.Form, System.Web.HttpRequest.ServerVariables,
and System.Web.HttpRequest.Cookies items."`
When the request is a POST, accessing Params will read the posted data from the input stream, invalidating ARR's assumption. As will reading from the input stream.
I knew the data I needed was in the query string, not the posted data, so I worked around this by accessing the QueryString instead of Params. This avoids reading the posted data and works fine for me.
string value = request.QueryString["Name"];
This issue appears to be fixed in ARR 2.5.
Upgrading ARR appears to be the only solution if you need to access posted data before handing off to ARR. The key is to let HttpRequest handle acquiring the data into Params. If you read it directly it will not work.
I just ran into this bug and your experiences helped me determine the root cause.
My main server is MVC based and it looks at the Request.Form values in the Application_BeginRequest method. If the form values are accessed ARR fails to forward the body of a HTTP POST request. GET requests will work fine since there is no body.
I have routes.IgnoreRoute ("Forum/{*pathInfo}"); as a registered route but ARR runs as a HttpModule and doesn't kick-in until later in the pipeline. That means my MVC based application is given the opportunity to access the content of the POST body which somehow prevents ARR from accessing the body itself and forwarding it to the proxy'd server.
Here is Cosmin's related post on the iis.net forums: ARR 2.0 BUG - combined with managed http module timeout on read inputstream
In my application I have all myserver.com/Forum/* requests being reverse proxy'd to a separate application on another server. So I simply checked the HttpContext.Current.Request.Url in my MVC application's Application_BeginRequest method to make sure it does not contain /Forum before accessing the Request.Form values. Once I did that the POST bodies made it through ARR just fine.
UPDATE: after further testing it appears that there are still problems with ARR as POST from non-authenticated users still fails. Instead of the main website being MVC I created a dummy IIS .NET 4.0 website with a single Default.html document. But I still ran into problems with POST requests and ARR. Then I switch the application pool to ASP.NET 2.0 and what do you know, it works. At this point I have to assume that something in the .NET 4.0 pipeline is accessing the input stream which prevents ARR from accessing the input stream itself in order to forward the POST body.
按照正常来说，再iis网站界面会有一个application request
routing cache 的 icon， 可以点击 设置timeout 但是这里没有显示
找到了 官方说明可以用命令行解决这个问题
https://blogs.iis.net/richma/502-3-bad-gateway-the-operation-timed-out-with-iis-application-request-routing-arr
blogs.iis.net
执行以下命令，然后重启下网站服务
进入到C:\Windows\System32\inetsrv 打开管理员命令行工具执行以下命令
appcmd.exe set config -section:system.webServer/proxy /timeout:"00:00:45" /commit:apphost
重启下网站服务
我写的原文地址
https://zhuanlan.zhihu.com/p/157557980