I am using C# on .NET Core for the back-end API and Angular 6 for the front-end. When I upload a file to test on my localhost, I can upload any size file without error, but when on the production, it limits me to upload to 64KB. If the file I try to upload is larger than 64KB, it throws an error
No Access-Control-Allow-Origin header is present on the requested resource How can this be solved?
To allow larger file size, you need to update your Web.config file for your API.
Under your <system.webServer> tag, please add the following and define the size
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="2147483648" /> <!--2GB-->
</requestFiltering>
</security>
You can set any size but make sure the timeout is long enough to process the request if it's a huge file otherwise the API will throw a Timeout error
the timeout can be set in web.config also as following
<httpRuntime targetFramework="4.7.2" executionTimeout="9999" maxRequestLength="2000000" /> <!--approx 2GB-->
For more information please see the following
https://forums.asp.net/post/6084972.aspx
https://www.strathweb.com/2012/09/dealing-with-large-files-in-asp-net-web-api/
Hope this helps