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"Dick
Applebaum" To: CF-Talk <[EMAIL PROTECTED]>
<dick@lacara. cc:
com> Subject: RE: forcing downloads
07/27/2001
08:08 AM
Please
respond to
cf-talk
>Hi folks..
>
>can anyone help us out with this one, it should be so simple and I just
>can't accept all the hassle we've been having to try and figure it out.
>
>What we want to do is have the user click a link to a cfm file, that cfm
>file then returns a file (for arguements sake a .xls file) which starts to
>download to the users machine (forcing download rather than returning to
>browser).
>
>We've tried using CFCONTENT and setting the type to unknown, this will
>start the file downloading all right but the name that appears in the
>dialog boxes is the name of the orginal cfm file that was called rather
>than the name of the actual file (i.e. saves as "download.cfm" rather than
>"file2download.xls" )
>
>surely this is a simple operation? ... I really hope somebody can make me
>look stoopid with the answer..
>
>in hope
>
>.jez
>----
>Jeremy Becker ([EMAIL PROTECTED])
This thread pops up ever week or so...
There are several problems with different browsers & platforms
(incompatibilities, partial implementations and outright bugs)
Based on help from several others, I think that the following will work on
most current browsers.
It downloads either a text file or a TSV file which normally would be
displayed.
It gets the correct name (must be supplied with the form or the link)
I have testes successfully on:
Mac IE 5.x
Mac NN 4.x
Win IE 4.x
Win IE 5.x
Win NN 4.x
If you can test it on any other platforms, it would help.
the URL:
http://wwww.instasales.com/Samples/DownloadFile/DownloadFile.cfm
Give it a try!
Dick
The Source:
<CFSETTING ENABLECFOUTPUTONLY="YES">
<!--- ------------------------------------------------------------ --->
<!--- StandAloneDownload.cfm --->
<!--- ------------------------------------------------------------ --->
<!--- Requests a download then performs that download --->
<!--- ------------------------------------------------------------ --->
<!--- Due to a Bug in MSIE 5.x , we must include the File Name in --->
<!--- the Form or Link URL of the page called to invoke the --->
<!--- download. --->
<!--- --->
<!--- We do this in the form: --->
<!--- --->
<!--- TemplateName.cfm/FileName/ --->
<!--- --->
<!--- For example: --->
<!--- --->
<!--- <form action="StandAloneDownload.cfm/Test.txt/"> --->
<!--- --->
<!--- or --->
<!--- --->
<!--- <a href="StandAloneDownload.cfm/Test.txt/"> --->
<!--- --->
<!--- ------------------------------------------------------------ --->
<!--- --->
<!--- MSIE 4.x will try to display a file type that it recognizes, --->
<!--- in particular text and html files. To prevent this, we --->
<!--- trick the browser by supplying an fake file name (without --->
<!--- a suffix). --->
<!--- --->
<!--- ------------------------------------------------------------ --->
<cfset tab = chr(9)>
<cfset crlf = chr(13) & chr(10)>
<!--- Get the File Path set in application.cfm --->
<cfset FilePath = Request.FilePath>
<cfif isdefined("BeginDownload")>
<!--- ------------------------------------------------------------ --->
<!--- Download the File --->
<!--- ------------------------------------------------------------ --->
<cfset RequestedFileType = ListLast(ListLast(CGI.Path_Info, "/"), ".")>
<cfif RequestedFileType eq "tsv">
<cfset FileName = "Test.tsv">
<cfset FakeName = "Test.tsv">
<cfset FileType = "text/tab-separated-values">
<cfset FakeType = "-#FileType#-">
<cfelse>
<cfset FileName = "Test.txt">
<cfset FakeName = "Test">
<cfset FileType = "text/unknown">
<cfset FakeType = "-#FileType#-">
</cfif>
<cfif ReFindNoCase("MSIE", CGI.HTTP_USER_AGENT)>
<cfheader name="Content-type" value="#FileType#">
<cfheader name="Content-Disposition" value="attachment; filename
=#FakeName#" >
<cfcontent type="#FakeType#" file="#FilePath##FileName#">
<cfelse>
<cfheader name="Content-type" value="#FileType#">
<cfheader name="Content-Disposition" value="attachment; filename
=#FileName#" >
<cfcontent type="#FileType#" file="#FilePath##FileName#">
</cfif>
<cfelse>
<!--- ------------------------------------------------------------ --->
<!--- Show Download Request Form --->
<!--- ------------------------------------------------------------ --->
<cfoutput>
<html>
<head>
<title>Sample - Standalone Download</title>
</head>
<body background="">
<h3>Sample - Standalone Download</h3>
<CFSETTING ENABLECFOUTPUTONLY="YES">
<cfset FileName = "Test">
<!--- Due to a bug in MSIE, we must furnish the file name in the URL
--->
<!--- (Form Action parameter. This will be generated dynamically,
--->
<!--- based on the file format selected within the form, when the form
--->
<!--- is submitted.
--->
<form name="DownloadForm" method="post" action="">
<select name="format_option">
<option value="txt">Select File Type</option>
<option value="txt">txt</option>
<option value="tsv">tsv</option>
</select>
<!--- Due to a bug in MSIE, we must furnish the file name in the URL
--->
<input type="Submit" name="BeginDownload" value="Begin Download"
onClick=
"with (document.DownloadForm) {
var
x=format_option.options[format_option.selectedIndex].value.toLowerCase();
var y='.txt';
if(x.indexOf('txt')>=0) {
y='.txt'
}else{
if(x.indexOf('tsv'>=0)) {
y='.tsv';
}
}
action='#CGI.Script_Name#/#FileName#'+y+'/ ';
}
">
</form>
</body>
</html>
</cfoutput>
</cfif>
<CFSETTING ENABLECFOUTPUTONLY="No">
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