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目前我正在從Amazon S3使用.NET SDK下載文件,我現在有下面的代碼來做到這一點(只有這些文件被允許):下載Amazon S3的對象,說的Windows文件被損壞
With request
.WithBucketName(bucketName)
.WithKey(key)
End With
response2 = client.GetObject(request)
Dim strReader As MemoryStream = New MemoryStream
response2.ResponseStream.CopyTo(strReader)
Response.ContentType = getContentType(key)
Response.OutputStream.Write(strReader.GetBuffer, 0, strReader.GetBuffer.Length)
Dim fileName As String = Path.GetFileName(key)
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName)
Return ""
End Function
Private Function getContentType(ByVal fileToContent As String) As String
Dim fileExtension As String = Path.GetExtension(fileToContent)
Dim contentType As String
Select Case fileExtension
Case ".bmp"
contentType = "image/bmp"
Case ".png"
contentType = "image/png"
Case ".xlsx", ".xls"
contentType = "application/vnd.ms=excel"
Case ".jpg", ".jpeg", ".gif"
contentType = "image/jpeg"
Case ".pdf"
contentType = "application/pdf"
Case ".ppt", ".pptx"
contentType = "application/vnd.ms-powerpoint"
Case ".doc", ".docx"
contentType = "application/msword"
Case Else
contentType = "text/plain"
End Select
Return contentType
End Function
我有兩個問題:第一,當我嘗試打開客戶端窗口上的文件時告訴我(MS Office文件)文件已損壞,有時無論如何設法打開它們,有時不是。其次,如果我的文件有類似.pptx的擴展名,並且我在內容類型中說'PowerPoint',那麼瀏覽器似乎會試圖向它們添加一個擴展名,如'.ppt'或'.doc'。有什麼辦法解決這個問題?
編輯:打開MS Office文件時我得到實際的消息:「PowerPoint發現在PowerPointFile.ppt不可讀的內容。你想恢復本演示文稿的內容嗎?如果您信任此演示文稿的來源,請單擊是。
關於#2,您需要爲'。*** x' Office文檔使用不同的MIME類型。請參閱[這裏](http://stackoverflow.com/a/4212908/492405) – vcsjones
好吧,我現在沒有打開文件的問題,雖然我仍然從窗口中打開它們之前得到那個神祕的錯誤信息。 –