C# 在C中使用RESTAPI时，什么会影响HTTP POST的响应时间#_C#_Rest

C# 在C中使用RESTAPI时，什么会影响HTTP POST的响应时间#

c# rest

C# 在C中使用RESTAPI时，什么会影响HTTP POST的响应时间#,c#,rest,C#,Rest,我正在尝试用C#后端制作一个简单的RESTWebAPI 我的主要问题是：如果我使用了一个非常大的文件，为什么我的web客户端要花这么长时间才能显示收到了响应？无论文件大小如何，我返回响应的方法似乎都能很快完成下面是我的代码以及输出和两个不同的HTTPPOST语句及其结果。在我的第一个示例中，我使用了一个246KB的文件，并在20ms内从客户端获得响应。第二个示例使用一个2089344KB的文件，并在大约45秒后在客户端获得响应。两个日志都显示，从方法开始到创建结果之间只有几毫秒的时间感谢您的

我正在尝试用C#后端制作一个简单的RESTWebAPI

我的主要问题是：如果我使用了一个非常大的文件，为什么我的web客户端要花这么长时间才能显示收到了响应？无论文件大小如何，我返回响应的方法似乎都能很快完成

下面是我的代码以及输出和两个不同的HTTPPOST语句及其结果。在我的第一个示例中，我使用了一个246KB的文件，并在20ms内从客户端获得响应。第二个示例使用一个2089344KB的文件，并在大约45秒后在客户端获得响应。两个日志都显示，从方法开始到创建结果之间只有几毫秒的时间

感谢您的帮助！谢谢

代码：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第一个HTTP帖子：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第一反应：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第一个日志：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第二个HTTP帖子：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第二反应：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

第二个日志：

[HttpPost, Route("test/upload")]
    public HttpResponseMessage Post([FromUri]string filename)
    {


        var task = Request.Content.ReadAsStreamAsync();
        System.Diagnostics.Debug.WriteLine("1: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        task.Wait();
        System.Diagnostics.Debug.WriteLine("2: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        Stream requestStream = task.Result;


        try
        {
            System.Diagnostics.Debug.WriteLine(filename);
            System.Diagnostics.Debug.WriteLine("3: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
            requestStream.Close();

        }
        catch (IOException)
        {
            requestStream.Close();
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }
        System.Diagnostics.Debug.WriteLine("4: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.Created);
        System.Diagnostics.Debug.WriteLine("5: " + (DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond));
        return result;
    }

POST /test/upload?filename=test HTTP/1.1
Content-Length: 252335
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 252335 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?BQzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:50:07 GMT
Content-Length: 0

1: 63642721970786
2: 63642721970788
test
3: 63642721970791
4: 63642721970792
5: 63642721970793

POST /test/upload?filename=test HTTP/1.1
Content-Length: 2139488256
Host: localhost:64105
Content-Type: application/octet-stream

[message-body; type: application/octet-stream, size: 2139488256 bytes]

HTTP/1.1 201 Created
Cache-Control: no-cache
Pragma: no-cache
Expires: -1
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-SourceFiles: =?UTF-8?B?QzpcVXNlcnNcSWFuXERvY3VtZW50c1xXb3JraW5nRm9sZGVyXFNpbXBsZVJlc3RcU2ltcGxlUmVzdFx0ZXN0XHVwbG9hZA==?=
X-Powered-By: ASP.NET
Date: Wed, 04 Oct 2017 17:56:07 GMT
Content-Length: 0

1: 63642722167480
2: 63642722167481
test
3: 63642722167484
4: 63642722167485
5: 63642722167487

看起来您没有对

requestStream

执行任何操作。在打印文件名之前添加此项，您应该看到时间差异

new StreamReader(requestStream).ReadToEndAsync().Wait();

至于为什么现在看不到时差，整个请求在调用控制器之前发送到服务器。请参阅此问题，了解流式处理请求的解决方案，而不是等待整个正文