Request size limit in aspnet core application hosted on azure app service

Kirankumar Bharsadiya 40

I have my aspnet core 8 application hosted on azure app service. In the app, when I upload a file it give me request body size related error. I configured following code .


//Solution 1 : 
services.Configure

Tiny Wang-MSFT 2,731 Reputation points Microsoft Vendor

2024-09-10T01:23:22.46+00:00

Hi @Kirankumar Bharsadiya , your question looks incomplete, could you please let us know the error message and what you had done for resolving the issue? By the way, may I know whether the upload feature worked well when you test locally and the issue only occurred after deploying to Azure App Service?

Accepted answer

Sergio Andrés Vargas Acosta 75 Reputation points

2024-09-10T02:33:22.5666667+00:00

Hi.

To address the request body size limit issue in an ASP.NET Core 8 application hosted on Azure App Service, you can increase this limit in your code. In the Program.cs file, configure the maximum allowed request body size using services.Configure<FormOptions>(options => { options.MultipartBodyLengthLimit = 104857600; });, where 104857600 represents 100 MB. Also, ensure that you verify the Azure App Service configuration, although the main adjustment is typically done in the application code.

// Configure services``

builder.Services.Configure<FormOptions>(options => { ``// Set the maximum file size (e.g., 100 MB)`` options.MultipartBodyLengthLimit = ``104857600``; ``// 100 MB

});
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SurferOnWww 3,126 Reputation points

2024-09-10T03:45:27.2833333+00:00

I guess that your ASP.NET Core application is hosted by the IIS or Kestrel. If so, there is a limitation in maximum request body size of 30,000,000 bytes by default as described in the Microsoft document Upload files in ASP.NET Core.

Kestrel maximum request body size: For apps hosted by Kestrel, the default maximum request body size is 30,000,000 bytes, which is approximately 28.6 MB.

IIS: The default request limit (maxAllowedContentLength) is 30,000,000 bytes, which is approximately 28.6 MB.

It can be customized as described in the above document.
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SurferOnWww 3,126 Reputation points

2024-09-10T03:56:03.97+00:00

I guess that your ASP.NET Core application is hosted by the IIS or Kestrel. If so, there is a limitation in maximum request body size of 30,000,000 bytes by default as described in the Microsoft document Upload files in ASP.NET Core.

Kestrel maximum request body size}: For apps hosted by Kestrel, the default maximum request body size is 30,000,000 bytes, which is approximately 28.6 MB.

IIS:The default request limit (maxAllowedContentLength) is 30,000,000 bytes, which is approximately 28.6 MB.

It can be customized as described in the above document.

Kirankumar Bharsadiya 40 Reputation points

2024-09-10T09:32:10.59+00:00

I used all the configuration from the coding side in startup file. But they only work in local environment. But when added maxAllowedContentLength in web.config file which is auto generated while deploying in azure app service, it is working as expected. But. my concern is using configurations from web.config file in .net8 might not standard way as web.config is concept of IIS and .net framework ?

SnehaAgrawal-MSFT 21,691 Reputation points

2024-09-11T08:23:55.1566667+00:00

Reached you privately.
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