问题
I have in my project a page DownloadDocument.aspx
and it's codebhind is DownloadDocument.aspx.cs
In my DownloadDocument.aspx
i have an anchor which take a dynamic link like this:
<a id="downloadLink" runat="server" style="margin:5px"
href="<%# CONTENT_DIRECTORY_ROOT + document.Path %>">Download current file</a>
I want to add a httphandler to control the file name downloaded, How can i do it? Thanks in advance.
回答1:
How about using a generic handler (.ashx) for this?
You need to add loading specific information, like filename, contenttyp and the content itself. The sample should give you a good headstart.
public class GetDownload : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
if (!string.IsNullOrEmpty(context.Request.QueryString["IDDownload"]))
{
context.Response.AddHeader("content-disposition", "attachment; filename=mydownload.zip");
context.Response.ContentType = "application/octet-stream";
byte[] rawBytes = // Insert loading file with IDDownload to byte array
context.Response.OutputStream.Write(rawBytes, 0, rawBytes.Length);
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
The generic handler is called from a URL, like this:
<a href="/GetDownload.ashx?IDDownload=1337">click here to download</a>
回答2:
it depends on type of file you are trying to download...because every request is gone through HTTPHandler
's ProcessRequest
. and it's checks each and every request one by one..
You need to add any HTTPHandler
to your project and need to add something like this in your web.config
.
<httpHandlers>
<add path="*.jpg,*.jpeg,*.bmp,*.tif,*.tiff" verb="*" type="NameofYourHandler" />
</httpHandlers>
This will check your request for every Image
type.. mentioned in path
attribute
Edit :
<add verb="*" path="*DownloadDocument.aspx " type="NameofYourHandler"/>
回答3:
You can try with this code
<httpHandlers>
<add
verb="POST"
path="*.jpg,*.jpeg,*.bmp,*.tif,*.tiff"
type="YourHandler" />
</httpHandlers>
来源:https://stackoverflow.com/questions/12318715/asp-net-add-a-httphandler-to-edit-downloaded-file-name