进行服务调用时 Request.InputStream 为空 [英] Request.InputStream is empty when service call is made

问题描述

我正在开发一个 ASP.NET 4.5 应用程序，但遇到了一个非常烦人的问题.迁移到 VS2012 后，我们遇到了与 此处.给定的解决方案有效，但是我现在发现另一个问题正在发生.由于某种原因，包含 HTTP 请求正文内容的 InputStream 报告为空.Content-Length 标头声称存在数据，但我无法访问它.

I'm working on an ASP.NET 4.5 application and I've encountered a very annoying issue. After migrating to VS2012 we encountered the same issue as here. The given solution worked, however I've now discovered that another issue is occurring. For some reason, the InputStream that contains the body content of the HTTP request is reported to be empty. The Content-Length header claims that there is data present, but I have no way of accessing it.

奇怪的是，数据似乎存在于上面链接问题中指定的解决方法模块中，但在模块和 API 调用之间的某个点，流被一个空的替换.请参见以下示例:

The odd thing is that the data seems to be present in the workaround module specified in the linked question above, but the stream is replaced by an empty one at some point between the module and the API call. See the following example:

public class WcfReadEntityBodyModeWorkaroundModule : IHttpModule
{
    public void Dispose() { }

    public void Init(HttpApplication context)
    {
        context.BeginRequest += context_BeginRequest;
    }

    void context_BeginRequest(object sender, EventArgs e)
    {
        HttpApplication app = sender as HttpApplication;
        //This will force the HttpContext.Request.ReadEntityBody to be "Classic" and will ensure compatibility..

        Stream stream = app.Request.InputStream;
        // This stream has data...
    }
} 

...

    [OperationContract]
    [WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Xml)]
    public Dictionary<string,string> SaveAudioFile()
    {
        Stream s = HttpContext.Current.Request.InputStream;
        // ...but this one does not. Request.ContentLength is nonzero, but
        // the InputStream.Length property is zero.
        ...
    }

从配置中删除模块只会在访问流时导致异常，就像以前一样.

Removing the module from the configuration just causes an exception when accessing the stream, as it did before.

有什么想法吗?

推荐答案

在其他答案中找到了这个:

Found this on the other answers:

Request.InputStream.Position = 0;

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