Coldfusion: allowing max file size when uploading
Introduction:
As a web developer, you will build routines or functions to allow the user to upload an image, xls file, pdf file, etc. It is always a good rule, to limit the max file size that the user is uploading. This will eliminate other issues that may arise due to a large file being uploaded. One that comes to mind, is a timeout issue, which than leads to a frustrated user. Try to build your web applications with the user in mind. Limit any possible pitfalls that could occur on the user side.
Coldfusion Code:
Below is the sample Coldfusion code when the file is uploaded.
<cfscript>
// if the form is submitted, do the following
</cfscript>
<CFIF isdefined ("uploadfile")>
<CFIF VAL(CGI.CONTENT_LENGTH) GT 20000>
<cflocation addtoken="no"
url="index.cfm?Note=File too Large! (#VAL(CGI.CONTENT_LENGTH/1000)# KB)">
<CFABORT>
<CFELSE>
<CFFILE
ACTION="Upload"
FILEFIELD="whatfile"
DESTINATION="C:\customer\uploads\"
NAMECONFLICT="OVERWRITE">
<cflocation addtoken="no"
url="index.cfm?Note=File Uploaded (#VAL(CGI.CONTENT_LENGTH/1000)# KB)">
<CFABORT>
</CFIF>
</CFIF>HTML Form Code:
below is the sample HTML for the form that will actually upload the file.
<cfparam name="URL.Note" default=""> <CFOUTPUT> <strong><font color="RED">#URL.NOTE#</font></strong> </CFOUTPUT> <cfform action="index.cfm?uploadfile=yes" method="post" enctype="multipart/form-data"> What File: <BR> <cfINPUT NAME="WhatFile" TYPE="File" SIZE="60" required="yes" message="Please select file"> <BR> <input type="Submit" value="Upload File"> </cfform>
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