c# - 来自 wcf 服务的 Httpwebrequest

Question

我是 WCF 的新手，我已经为 httpwebrequest 创建了一个服务到 SSRS 报告并以 PDF 或 EXCEL 格式呈现报告并将其保存到驱动器上的特定位置。

我在按钮单击事件上从 Web 应用程序调用此服务。但是它在 GetResponse() 上出错

The remote server returned an error: (403) Forbidden

此外，我在控制台应用程序中创建了相同的代码，它运行完美。

下面是我的代码

public class ReportGenerator : IReportGenerator
    {
        public void ReportRequest()
        {
            try
            {
                string URL = "http://localhost/ReportServer2008?/ssrswcf/ssrswcftest";
                string Command = "Render";
                string Format = "PDF";//"EXCEL"

                URL = URL + "&rs:Command=" + Command + "&rs:Format=" + Format + "&sid=5";

                System.Net.HttpWebRequest Req = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(URL);

                Req.UseDefaultCredentials = true;
                Req.Method = "GET";

                string path = @"C:\ssrswcftest\" + Convert.ToString(Guid.NewGuid()) + @".pdf";

                System.Net.WebResponse objResponse = Req.GetResponse();
                System.IO.FileStream fs = new System.IO.FileStream(path, System.IO.FileMode.Create);
                System.IO.Stream stream = objResponse.GetResponseStream();

                byte[] buf = new byte[1024];
                int len = stream.Read(buf, 0, 1024);
                while (len > 0)
                {
                    fs.Write(buf, 0, len);
                    len = stream.Read(buf, 0, 1024);
                }
                stream.Close();
                fs.Close();
            }
            catch (WebException ex)
            {
                //
            }
            catch (Exception ex)
            {
                //
            }
        }
    }

下面是 fiddler 的详细信息

使用 IIS 托管的 WCF 有错误

请求 header

GET /ReportServer2008?/ssrswcf/ssrswcftest&rs:Command=Render&rs:Format=PDF&sid=5 HTTP/1.1
Authorization: Negotiate some_long_string
Host: xyz

响应头

HTTP/1.1 403 Forbidden
Cache-Control: private
Content-Length: 2925
Content-Type: text/html; charset=utf-8
Server: Microsoft-HTTPAPI/2.0
X-AspNet-Version: 2.0.50727
Date: Mon, 22 Jun 2015 15:39:29 GMT

使用控制台应用程序托管的 WCF 运行完美

请求 header

GET /ReportServer2008?/ssrswcf/ssrswcftest&rs:Command=Render&rs:Format=PDF&sid=5 HTTP/1.1
Authorization: Negotiate some_long_string
Host: xyz

响应头

HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 25653
Content-Type: application/pdf
Expires: Mon, 22 Jun 2015 16:16:42 GMT
Last-Modified: Mon, 22 Jun 2015 16:17:43 GMT
Set-Cookie: RSExecutionSession%3a%2fssrswcf%2fssrswcftest=aywu4s45sefnmw45z50bn2vh; path=/
Server: Microsoft-HTTPAPI/2.0
X-AspNet-Version: 2.0.50727
FileExtension: pdf
Content-Disposition: attachment; filename="ssrswcftest.pdf"
Date: Mon, 22 Jun 2015 16:17:42 GMT

Answer 1

Authorization: Negotiate indicates that authentication is in use.您的 WCF 服务可能没有所需的凭据。询问服务所有者需要什么身份验证并进行配置。