C# 在C中使用WebRequest时为Microsoft Report Server提供凭据#
我想使用我的C#代码从我们的Microsoft报表服务器下载PDF报表。我不知道为什么,但我做错了什么。我总是返回一个错误,即身份验证失败(HTTP 401)C# 在C中使用WebRequest时为Microsoft Report Server提供凭据#,c#,authentication,webrequest,reportserver,C#,Authentication,Webrequest,Reportserver,我想使用我的C#代码从我们的Microsoft报表服务器下载PDF报表。我不知道为什么,但我做错了什么。我总是返回一个错误,即身份验证失败(HTTP 401) 公共静态异步任务下载WebDocument(字符串url){ if(string.IsNullOrEmpty(url)) 抛出新ArgumentNullException(nameof(url)); WebRequest=WebRequest.Create(url); request.Method=“GET”; request.Authe
公共静态异步任务下载WebDocument(字符串url){
if(string.IsNullOrEmpty(url))
抛出新ArgumentNullException(nameof(url));
WebRequest=WebRequest.Create(url);
request.Method=“GET”;
request.AuthenticationLevel=System.Net.Security.AuthenticationLevel.MutualAuthRequested;
request.Credentials=newnetworkcredential(“MyUsername”、“MyPassword”、“MyDomain”);
//request.Headers.Add(“Authorization”,$”基本{Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(“MyUsername:MyPassword”))});
试一试{
使用WebResponse=wait request.GetResponseAsync();
返回response.GetResponseStream();
}捕获(例外情况除外){
var a=例如消息;
投掷;
}
//返回等待下载的WebDocument(uri);
}
此代码总是遇到异常。但是为什么呢
PS:
根据要求,这里是堆栈跟踪。内部没有例外
bei System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
bei System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- Ende der Stapelüberwachung vom vorhergehenden Ort, an dem die Ausnahme ausgelöst wurde ---
bei System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
bei System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
bei System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
bei DE.ZA.TrailerLoadingAssistant.Web.Code.WebHelper.<DownloadWebDocument>d__0.MoveNext() in C:\Users\Reichelt\source\repos\DE.ZA.TrailerLoading\DE.ZA.TrailerLoadingAssistant.Web\Code\WebHelper.cs:Zeile 28.
bei System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
bei System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar、Func`2 endFunction、Action`1 endAction、Task`1 promise、Boolean requiresSynchronization)
---这是一个非常有趣的故事---
bei System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccess(任务任务)
bei System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification(任务)
bei System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
C:\Users\Reichlet\source\repos\DE.ZA.TrailerLoadingAssistant\DE.ZA.TrailerLoadingAssistant.Web.Code.WebHelper.d\u 0.MoveNext()中的bei DE.ZA.TrailerLoadingAssistant.Web\Code\WebHelper.cs:Zeile 28。
实际上,我使用不同的方法将报告呈现为PDF文档:
public static byte[] DownloadAsPDF(string ReportServer, string ReportPath)
{
ReportViewer ReportViewer1 = new ReportViewer();
ReportViewer1.ServerReport.ReportServerCredentials = new
CustomReportCredentials("MyUsername", "MyPassword", "MyDomain");
ReportViewer1.ProcessingMode =
Microsoft.Reporting.WebForms.ProcessingMode.Remote;
ReportViewer1.ServerReport.ReportServerUrl = new Uri(ReportServer);
ReportViewer1.ServerReport.ReportPath = ReportPath;
byte[] bytes = ReportViewer1.ServerReport.Render("PDF");
return bytes;
}
public class CustomReportCredentials :
Microsoft.Reporting.WebForms.IReportServerCredentials
{
// local variable for network credential.
private string _UserName;
private string _PassWord;
private string _DomainName;
public CustomReportCredentials(string UserName, string PassWord,
string DomainName)
{
_UserName = UserName;
_PassWord = PassWord;
_DomainName = DomainName;
}
public System.Security.Principal.WindowsIdentity ImpersonationUser
{
get
{
return null; // not use ImpersonationUser
}
}
public ICredentials NetworkCredentials
{
get
{
// use NetworkCredentials
return new NetworkCredential(_UserName, _PassWord,
_DomainName);
}
}
public bool GetFormsCredentials(out Cookie authCookie, out string
user, out string password, out string authority)
{
authCookie = null;
user = password = authority = null;
return false;
}
}
我意识到,如果我使用request.Credentials=CredentialCache.DefaultCredentials,它就会工作。所以我的证件肯定有问题。但这绝对不是打字错误
我遇到了这个问题,似乎有人在更改网络权限。一周使用凭据可以正常工作,下一周使用DefaultCredentials可以正常工作。真的很奇怪,所以我加入了Try/Catch并求助于DefaultCredentials。如果服务帐户失败,请参阅代码注释:
public class SRSHelper
{
private ReportingService2005 rsServ;
private ReportingExecution2005 rsExec = new ReportingExecution2005();
private ReportParameter[] reportParameters;
private ExecutionInfo execInfo = null;
public SRSHelper(string reportUserName, string decryptedPassword, string reportDomain, string reportServerURL)
{
rsServ = new ReportingService2005(reportServerURL);
rsExec.Url = reportServerURL + @"ReportExecution2005.asmx";
System.Net.NetworkCredential creds = new System.Net.NetworkCredential();
creds.UserName = reportUserName;
creds.Password = decryptedPassword;
creds.Domain = reportDomain;
rsExec.Credentials = creds;
rsServ.Credentials = creds;
}
public ReportParameter[] GetSRSReportParameters(string reportName)
{
string report = "/Reporting/" + reportName;
bool forRendering = false;
string historyID = null;
ParameterValue[] values = null;
DataSourceCredentials[] credentials = null;
try
{
return rsServ.GetReportParameters(report, historyID, forRendering, values, credentials);
}
catch
{
//If the Service Account credentials fail to work - try the users credentials - XYZ vendor regularly change things around or the network fails or for some reason beyond our control we have to change the settings.
rsExec.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
rsServ.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
return rsServ.GetReportParameters(report, historyID, forRendering, values, credentials);
}
}
能否提供有关引发的异常的更多详细信息?堆栈跟踪、内部异常、错误代码、响应正文?@MathiasR.Jessen无内部异常。我将在上面添加堆栈跟踪。异常类型+消息?@MathiasR.Jessen它是一个
WebException
。消息是“Der Remoteserver hat einen Fehler zurückgeben:(401)Nicht autorisert.”状态字段设置为ProtocolError
。我意识到,如果我使用request.CredentialCache=CredentialCache.DefaultCredentials
,它会工作。所以我的证件肯定有问题。但绝对没有错,谢谢。我可以在哪个库中找到CustomReportCredentials
类?抱歉,我刚刚将其添加到我的答案中。谢谢您的想法。它似乎起作用了。但是有没有办法以异步方式下载文件?构建报表大约需要一分钟左右的时间,因此它会长时间阻塞该服务器线程。