使用Enablebuffering多次读取Asp Net Core 请求体
使用Enablebuffering多次读取Asp Net Core 请求体
1 .Net Core 2.X时代
使用EnableRewind倒带
public IActionResult Index()
{
Request.EnableRewind();
using (var reader = new StreamReader(Request.Body))
{
var body = reader.ReadToEnd();
// Do something
Request.Body.Seek(0, SeekOrigin.Begin);
body = reader.ReadToEnd();
}
// More code
return View("Index");
}
2 .NET Core 3.0时代
因为.NET Core 3.0 preview 6以后(6还是可以使用的), Microsoft.AspNetCore.Http.Internal不再是公有方法. 所以EnableRewind不能使用。
使用Enablebuffering
public async Task<IActionResult> Index()
{
Request.EnableBuffering();
using (var reader = new StreamReader(Request.Body, encoding: Encoding.UTF8))
{
var body = reader.ReadToEndAsync();
// Do some processing with body…
// Reset the request body stream position so the next middleware can read it
Request.Body.Position = 0;
}
return View();
}
// 默认不支持同步方法:ReadToEnd()
// 需要设置AllowSynchronousIO=true;
// System.InvalidOperationException: 'Synchronous operations are disallowed. Call ReadAsync or set AllowSynchronousIO to true instead.'