我尝试了这个: Read request body twice 还有这个: https://github.com/aspnet/Mvc/issues/4962 但没有用。 我这样阅读请求正文:
app.Use(async (context, next) =>
{
var requestBody = await ReadStream(context.Request.Body);
var requestPath = context.Request.Path.ToString();
//Do some thing
await next.Invoke();
var responseStatusCode = context.Response.StatusCode;
//Do some other thing
});
private async Task<string> ReadStream(Stream stream)
{
using (var streamReader = new StreamReader(stream))
{
var result = await streamReader.ReadToEndAsync();
return result;
}
}
在控制器中,我得到了“处置对象”或“空流”。
答案 0 :(得分:8)
.netcore 3.1版本。我创建了一个可重用的函数来读取请求正文。请注意更改:HttpRequestRewindExtensions.EnableBuffering(request)
。现在,EnableBuffering已成为HttpRequestRewindExtensions类的一部分。
public async Task<JObject> GetRequestBodyAsync(HttpRequest request)
{
JObject objRequestBody = new JObject();
// IMPORTANT: Ensure the requestBody can be read multiple times.
HttpRequestRewindExtensions.EnableBuffering(request);
// IMPORTANT: Leave the body open so the next middleware can read it.
using (StreamReader reader = new StreamReader(
request.Body,
Encoding.UTF8,
detectEncodingFromByteOrderMarks: false,
leaveOpen: true))
{
string strRequestBody = await reader.ReadToEndAsync();
objRequestBody = SerializerExtensions.Deserialize<JObject>(strRequestBody);
// IMPORTANT: Reset the request body stream position so the next middleware can read it
request.Body.Position = 0;
}
return objRequestBody;
}
此函数将返回一个JObject,该JObject可用于读取请求主体对象的属性。 SerializerExtensions是我用于序列化和反序列化的自定义扩展。
在中间件中,您可以在构造函数中注入IHttpContextAccessor httpContextAccessor
。然后访问HttpRequest request = _httpContextAccessor.HttpContext.Request;
之类的Request对象。最后,可以调用GetRequestBodyAsync(request)
答案 1 :(得分:1)
经过更多的挣扎和使用 “ context.Request.EnableRewind()” 终于像这样工作了:
app.Use(async (context, next) =>
{
context.Request.EnableRewind();
var stream = context.Request.Body;
using (var reader = new StreamReader(stream))
{
var requestBodyAsString = await reader.ReadToEndAsync();
if (stream.CanSeek)
stream.Seek(0, SeekOrigin.Begin);
//Do some thing
await next.Invoke();
var responseStatusCode = context.Response.StatusCode;
//Do some other thing
}
});
答案 2 :(得分:0)
这可能是因为using
各地的语句您的StreamReader
。 using将StreamReader
的调用置于基础流上。详情参见答案here。您可以尝试保留参考并在StreamReader
完成后处置await next.Invoke();
。
答案 3 :(得分:0)
第二次读取流时,流指针将设置到最后一个位置。您应该尝试将其移回零位,以便从头开始再次阅读。
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.WebUtilities;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NLog;
namespace Test_Middlewares.Middlewares
{
// You may need to install the Microsoft.AspNetCore.Http.Abstractions package into your project
public class LoggingMiddleware
{
private readonly RequestDelegate _next;
private readonly ILogger<LoggingMiddleware> _logger;
public LoggingMiddleware(RequestDelegate next, ILogger<LoggingMiddleware> logger)
{
_next = next;
_logger = logger;
}
public async Task InvokeAsync(HttpContext httpContext)
{
var HttpContextBody = httpContext.Request.Body;
string requestBody = "";
httpContext.Request.EnableBuffering();
// Leave the body open so the next middleware can read it.
using (var reader = new StreamReader(
httpContext.Request.Body,
encoding: Encoding.UTF8,
detectEncodingFromByteOrderMarks: false,
bufferSize: -1,
leaveOpen: true))
{
var body = await reader.ReadToEndAsync();
// Do some processing with body…
// Reset the request body stream position so the next middleware can read it
httpContext.Request.Body.Position = 0;
}
_logger.LogDebug("Middleware 1 body =" + requestBody);
await _next.Invoke(httpContext);
}
}
// Extension method used to add the middleware to the HTTP request pipeline.
public static class LoggingMiddlewareExtensions
{
public static IApplicationBuilder UseLoggingMiddleware(this IApplicationBuilder builder)
{
return builder.UseMiddleware<LoggingMiddleware>();
}
}
}
有关更多信息,请参考以下链接:
https://devblogs.microsoft.com/aspnet/re-reading-asp-net-core-request-bodies-with-enablebuffering/
答案 4 :(得分:0)
我一直在挣扎,.net core 3.1发生了重大变化,“ context.Request.EnableRewind();” .net core 3.1中没有更多可用的内容,更有用的技巧visit here
asp.net mvc api .net core 3.1(startup.cs)中的工作代码
app.Use(async (context, next) =>
{
context.Request.EnableBuffering();
var stream = context.Request.Body;
using (var reader = new StreamReader(stream))
{
var requestBodyAsString = await reader.ReadToEndAsync();
if (stream.CanSeek)
stream.Seek(0, SeekOrigin.Begin);
//some logging and other stuff goes here
await next.Invoke();
}
});