dotnet runtime_error ai_generated true

Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException：请求正文过大。最大请求正文大小为 30000000 字节。

Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Request body too large. The max request body size is 30000000 bytes.

ID: dotnet/kestrel-request-body-too-large

其他格式: JSON · Markdown 中文 · English
90%修复率
89%置信度
1证据数
2023-02-14首次发现

版本兼容性

版本状态引入弃用备注
ASP.NET Core 6.0 active — — —
ASP.NET Core 7.0 active — — —
ASP.NET Core 8.0 active — — —

根因分析

传入的 HTTP 请求正文超过了 Kestrel 服务器配置的最大请求正文大小限制，默认约为 28.6 MB（30,000,000 字节），或可通过 MaxRequestBodySize 自定义。

English

The incoming HTTP request body exceeds the Kestrel server's configured maximum request body size limit, which defaults to ~28.6 MB (30,000,000 bytes) or can be customized via MaxRequestBodySize.

generic

官方文档

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/servers/kestrel/options

解决方案

  1. 使用 [RequestSizeLimit] 属性增加特定端点的限制：[RequestSizeLimit(50_000_000)] public IActionResult Upload() { ... }
  2. 在 Program.cs 中全局配置 Kestrel：builder.WebHost.ConfigureKestrel(options => options.Limits.MaxRequestBodySize = 50 * 1024 * 1024); // 50 MB

无效尝试

常见但无效的做法:

  1. 80% 失败

    This disables the limit entirely, risking denial-of-service from large payloads.

  2. 70% 失败

    Kestrel checks the uncompressed size; compression does not bypass the limit.