.net core读取Response.Body
读取请求体流的demo public static async Task<string> GetBodyForm(this HttpContext http){
var content = string.Empty;
var request = http.Request;
try
{
request.Body.Position = 0;
using var reader = new StreamReader(request.Body, Encoding.UTF8, leaveOpen: true);
var strRequestBody = await reader.ReadToEndAsync();
Console.WriteLine("ok");
Console.WriteLine(strRequestBody == null ? "null" : strRequestBody);
request.Body.Position = 0;
}
catch (Exception ex)
{
Console.WriteLine("err");
Console.WriteLine(ex);
}
return content;
}在ActionFilter中读取Request.Body
public class ActionFilterTestA : ActionFilterAttribute
{
public override async void OnActionExecuting(ActionExecutingContext context)
{
Console.WriteLine("From Request Body---->");
Console.WriteLine(await context.HttpContext.GetBodyForm());
Console.WriteLine("From Request Body---->");
}
}报错,一般是在Request.Body处报NotSupportedException
解决方案
在自定义中间件中调用EnableBuffering()
app.Use(async (context, next) =>
{
context.Request.EnableBuffering();
await next();
});疑问
(移除以上正确方案代码) 为什么在ActionFilterTestA中调用context.HttpContext.Request.EnableBuffering();没有效果?(没有报错,但是内容为空字符串)
猜测
请求体流在ActionFilter之前,在自定义中间件之后被消耗。 中间件执行顺序
测试
// 取消模型绑定
builder.Services.Configure<ApiBehaviorOptions>(options =>
{
options.SuppressInferBindingSourcesForParameters = true;
});Request.Body的内容打印成功。
推论
绑定模型时会消耗掉请求体流。
其他资料
https://markb.uk/asp-net-core-read-raw-request-body-as-string.html
结语
推荐还是通过中间件调用EnableBuffering解决问题
注意事项:
[*]避免关闭StreamReader导致关闭了Stream,可以通过leaveOpen: true解决
[*]重置Position = 0
来源:https://www.cnblogs.com/sigeer0-o/archive/2023/10/08/17749267.html
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