Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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EasyAuth middleware: System.IO.IOException - The response ended prematurely
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 78%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EYF%3C/text%3E%3C/svg%3E)
Yuan Feng
10
Reputation points
I didn't enable Easy Auth, but get a timeout error from it. Scale Up to P1V2 can mitigate the issue, but is it related to EasyAuth itself even I didn't turn it on?
| | HTTP proxy request encountered exception.
Type: System.Net.Http.HttpRequestException
Message: An error occurred while sending the request.
StackTrace: at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at Microsoft.Azure.AppService.Middleware.Forwarding.RequestForwarder.ForwardRequestAsync(HttpContext context) in /__w/1/s/src/EasyAuth/Middleware.Forwarding/RequestForwarder.cs:line 117
at Microsoft.Azure.AppService.Middleware.Forwarding.RequestForwarder.OnRequest(HttpContext context) in /__w/1/s/src/EasyAuth/Middleware.Forwarding/RequestForwarder.cs:line 92
InnerException
Type: System.IO.IOException
Message: The response ended prematurely.
StackTrace: at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken) | 6 |
Azure App Service
{count} votes
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Grmacjon-MSFT 19,151 Reputation points Moderator2023-07-19T21:09:35.7+00:00 Hi @Yuan Feng thanks for the question.
The error message you are seeing indicates that there is an issue with the HTTP proxy request that is being used by your web app. This error can occur even if you have not enabled Easy Auth, as the HTTP proxy is used for other purposes as well.
When did you start seeing this error? what happens when EasyAuth is enabled?
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Yuan Feng 10 Reputation points
2023-07-19T23:15:12.4+00:00 I start having it when I send several requests to my backend in a short time, and my backend calls OpenAI API. I suspect OpenAI API uses the HTTP proxy?
"what happens when EasyAuth is enabled?"
We haven't enabled it yet, but we don't think it is related to EasyAuth though, will try if still don't work for us
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Yuan Feng 10 Reputation points
2023-07-19T23:17:41.4433333+00:00 I started having it when I send several requests to the backend in a short time. And then the backend send requests to OpenAI API. I suspect OpenAI API using HTTP proxy and several requests at the same time can cause the problem. Is it possible?
"What happens when EasyAuth is enabled?"
We haven't enabled it yet, we will try if the above suspect is not right -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 49%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESL%3C/text%3E%3C/svg%3E)
Steven Leng 10 Reputation points2023-07-20T03:28:15.8533333+00:00 I'm encountering a similar problem, we don't have EasyAuth enabled but why is it still forwarding the request? is there a way we can completely shut EasyAuth down in our App Service?
Reading on this page https://learn.microsoft.com/en-us/azure/app-service/overview-authentication-authorization, is there a way to bypass the Auth middleware?
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Grmacjon-MSFT 19,151 Reputation points Moderator
2023-08-15T22:56:56.4266667+00:00 Hi @Yuan Feng apologies for the delay in response. It looks like this issue require deeper investigation. Could you please send us an email to AzCommunity[at]Microsoft[dot]com with the below details, so that we can enable a one-time-free support for you to work closely on this issue?
Email subject: <Attn - Grace >
Thread URL: <Microsoft Q&A Thread>
Subscription ID: <your Azure subscription id>
Please let me know here once the email is sent along with above requested details.
Thanks,
Grace
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Yuan Feng 10 Reputation points
2023-08-18T06:17:25.63+00:00 Hi Grace, I have sent the email, looking forward to chatting!
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(217.60000000000002, 28.999999999999996%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECE%3C/text%3E%3C/svg%3E)
CAMPOLMI-EXT Oscar 0 Reputation points2024-02-21T12:44:33.85+00:00 Hi @yuan feng @Grmacjon-MSFT , any updates on this issue? We are experiences this issue with EasyAuth middleware. In some cases it returns errors (System.Net.Http.HttpRequestException)even if it isn't enabled.
Thanks -
Yuan Feng 10 Reputation points
2024-02-21T20:56:24.26+00:00 Hi Oscar, in our case it happened because we hit the maximum resources in that app service already, therefore we upgraded our infra with more resources, and it resolved our issue
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Grmacjon-MSFT 19,151 Reputation points Moderator
2024-02-21T23:25:10.1733333+00:00 Hi CAMPOLMI-EXT Oscar this thread is about a year old please create a new thread with more details about your scenario so we know how best to assist you.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(70.4, 98%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERS%3C/text%3E%3C/svg%3E)
ritam sharma 0 Reputation points2024-06-18T14:18:50.0366667+00:00 @Steven Leng Hi, could you please let me know if you were able to solve this error? Perhaps by upgrading with more resources?
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