Core 6 Middleware Component error uploading file: "Form key length limit 2048 or value length l-CodePudding

I recently converted a .Net http handler to a .Net Core Middleware Component and am having trouble when uploading files. I'm getting the following error on this statement:

 if (context.Request.Form.ContainsKey(param))

System.IO.InvalidDataException: Form key length limit 2048 or value length limit 4194304 exceeded.

It appears that the entries in web.config of the .Net handler don't work in Core:

<httpRuntime requestValidationMode="2.0" maxRequestLength="2097151" executionTimeout="9999999" requestLengthDiskThreshold="10024000" />
<requestFiltering>
     <requestLimits maxAllowedContentLength="1024000000" maxQueryString="32768" maxUrl="65536" />
</requestFiltering>

I've seen where there may be issues with that in 3.1 and higher. Other references about creating a custom attribute to explicitly set key/value length limit. And others that simply used DisableRequestSizeLimit. Unfortunately, their examples referenced MVC applications and mine is very different. Here is the start of the code:

    private readonly RequestDelegate _next;

    public FileManager(RequestDelegate next)
    {
        _next = next;
    }

    public async Task Invoke(HttpContext context)
    {
    ....

I tried putting [DisableRequestSizeLimit] immediately before the public async Task Invoke but that still gave the error.

Can someone let me know what and where I need to add the higher limits to upload large files?.. or what other information I can provide?

EDIT FOR ANSWER:

I awarded the correct answer to Ruikai Feng but to make it clear for any future readers, here's the details.

Code was inside startup.cs:

 public void ConfigureServices(IServiceCollection services)
    {
        services.Configure<FormOptions>(x => { x.BufferBodyLengthLimit = long.MaxValue; x.ValueLengthLimit = int.MaxValue; x.KeyLengthLimit = int.MaxValue; x.MultipartBodyLengthLimit = long.MaxValue; })

I got carried away with maxing out all the values just to get it to work but it appeared x.ValueLengthLimit and x.KeyLengthLimit were the key players.

CodePudding user response：

You could try to set as below:

services.Configure<FormOptions>(x => { x.KeyLengthLimit = newkeylength;x.MultipartBodyLengthLimit = newcontentlength; });

You could check this document related with file upload for more details