从网址下载更新。 C#

Question

好的，我有一个应用程序可以在 http://mysite.ext/sub 检查更新/sub2/sub3/appname/ 第一次发布后（几天前），它正在正确地检查/下载该 URL 的更新，没有任何问题。

但是今天，我发布了一个新版本，仅对用户界面进行了微小的更改（更改按钮文本等），然后将最新发布上传到服务器...然后从桌面打开我的应用程序的现有版本，它检查更新，发现更新并继续下载它，但随后失败并出现此错误：

Cannot download the application. The application is missing required files. Contact application vendor for assistance.

我单击该错误对话框上的“详细信息”按钮，它打开了一个文本文件，其中显示：

PLATFORM VERSION INFO
 Windows    : 6.1.7600.0 (Win32NT)
 Common Language Runtime  : 4.0.21006.1
 System.Deployment.dll   : 4.0.21006.1 (B2Rel.021006-0100)
 clr.dll    : 4.0.21006.1 (B2Rel.021006-0100)
 dfdll.dll    : 4.0.21006.1 (B2Rel.021006-0100)
 dfshim.dll    : 4.0.30902.0 (Main.030902-0000)

SOURCES
 Deployment url   : file:///C:/Users/Jason/Desktop/appname.appref-ms%7C
      Server  : Microsoft-IIS/7.0
      X-Powered-By : ASP.NET
 Deployment Provider url  : http://mysite.ext/products/multimediaoffice/appname/appname.application

ERROR SUMMARY
 Below is a summary of the errors, details of these errors are listed later in the log.
 * Activation of C:\Users\Jason\Desktop\appname.appref-ms| resulted in exception. Following failure messages were detected:
  + Downloading http://mysite.ext/products/multimediaoffice/appname/Application Files/appname_11_0_0_5/appname.exe.manifest did not succeed.
  + The remote server returned an error: (404) Not Found.

COMPONENT STORE TRANSACTION FAILURE SUMMARY
 No transaction error was detected.

WARNINGS
 There were no warnings during this operation.

OPERATION PROGRESS STATUS
 * [7/02/2010 8:38:03 PM] : Activation of C:\Users\Jason\Desktop\appname.appref-ms| has started.
 * [7/02/2010 8:38:03 PM] : Performing necessary update check as specified by the deployment.
 * [7/02/2010 8:38:06 PM] : Consuming new update.
 * [7/02/2010 8:38:07 PM] : Installation of the application has started.

ERROR DETAILS
 Following errors were detected during this operation.
 * [7/02/2010 8:38:09 PM] System.Deployment.Application.DeploymentDownloadException (Unknown subtype)
  - Downloading http://mysite.ext/products/multimediaoffice/appname/Application Files/appname_11_0_0_5/appname.exe.manifest did not succeed.
  - Source: System.Deployment
  - Stack trace:
   at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)
   at System.Deployment.Application.SystemNetDownloader.DownloadAllFiles()
   at System.Deployment.Application.FileDownloader.Download(SubscriptionState subState)
   at System.Deployment.Application.DownloadManager.DownloadManifestAsRawFile(Uri& sourceUri, String targetPath, IDownloadNotification notification, DownloadOptions options, ServerInformation& serverInformation)
   at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, IDownloadNotification notification, DownloadOptions options, Uri& appSourceUri, String& appManifestPath)
   at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
   at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
   at System.Deployment.Application.ApplicationActivator.ConsumeUpdatedDeployment(SubscriptionState& subState, ActivationDescription actDesc)
   at System.Deployment.Application.ApplicationActivator.PerformDeploymentUpdate(SubscriptionState& subState, String& errorPageUrl)
   at System.Deployment.Application.ApplicationActivator.ProcessOrFollowShortcut(String shortcutFile, String& errorPageUrl, TempFile& deployFile)
   at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
   at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)
  --- Inner Exception ---
  System.Net.WebException
  - The remote server returned an error: (404) Not Found.
  - Source: System
  - Stack trace:
   at System.Net.HttpWebRequest.GetResponse()
   at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)

COMPONENT STORE TRANSACTION DETAILS
 No transaction information is available.

为什么此更新功能突然不起作用？我该如何修复它？

更新：

---

自从我创建这个问题以来，我已经完成了自己的小 ftp 客户端，并尝试将上面堆栈跟踪中提到的文件上传到服务器并收到此错误：

远程服务器返回错误： (550) 文件不可用（例如，未找到文件、无法访问）。我不明白这个...以前可以用...但现在不行了？

Answer 1

根据日志，应用程序似乎无法下载清单文件，因为它丢失（错误 404）：

http://mysite.ext/products/multimediaoffice/appname/Application Files/appname_11_0_0_5/appname.exe.manifest

您应该验证该文件是否存在于服务器上并且该地址是否可访问。

此地址中还有一个空格 - 应用程序文件。这可能是问题所在吗？

Answer 2

当您上传新版本时，一定存在某种错误，因为它至少不在服务器上，不在更新系统期望的位置。

Answer 3

例外情况似乎是更新服务器不可用（HTTP 404）。再试一次？

引用您的详细信息：

  System.Net.WebException
  - The remote server returned an error: (404) Not Found.
  - Source: System
  - Stack trace:
   at System.Net.HttpWebRequest.GetResponse()
   at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)

您可能想尝试通过浏览器检查 URL。您可能还想捕获这种服务器连接异常并告诉用户服务器当前不可用并稍后重试。