如何在asp net core 2.2中间件中多次读取请求正文? [英] How to read request body multiple times in asp net core 2.2 middleware?

问题描述

我试过这个:读取请求正文两次和这个:https://github.com/aspnet/Mvc/issues/4962但没有用.我这样阅读请求正文:

I tried this: Read request body twice and this: https://github.com/aspnet/Mvc/issues/4962 but did not work. I read request body like this:

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，我得到处置对象"或空流".

In controller I get 'disposed object' or 'empty stream'.

推荐答案

经过一番折腾和使用context.Request.EnableRewind()"它终于像这样工作了:

After some more struggling and use "context.Request.EnableRewind()" it's finally worked like this:

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
    }
});

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