MACROMEDIA COLFUSION MX 7-CFML Reference page 497

•
for checking variables for binary format
IsBinary
•
for determining the length of a binary object
Len
Example
The following example reads a GIF file as binary data, converts it to a binary-encoded string,
converts the binary-encoded data back to binary data, and writes the result to a file. It displays the
encoded string and the image in the output file.
<h3>Binary Encoding Conversion Example</h3>
<!--- Do the following if the form has been submitted. --->
<cfif IsDefined("Form.binEncoding")>
<!--- Read in a binary data file. --->
<cffile action="readbinary"
file="C:\CFusionMX7\wwwroot\CFIDE\administrator\images\help.gif"
variable="binimage">
<!--- Convert the read data to binary encoding and back to binary data. --->
<cfscript>
binencode=BinaryEncode(binimage, Form.binEncoding);
bindecode=BinaryDecode(binencode, Form.binEncoding);
</cfscript>
<!--- Write the converted results to a file. --->
<cffile action="write" file="C:\temp\help.gif" output="#bindecode#"
addnewline="No" >
<!--- Display the results. --->
<cfoutput>
<p><b>The binary encoding:</b> #Form.binEncoding#</p>
<p><b>The image converted into a binary-encoded string by BinaryEncode
</b><br>
#binencode#</p>
<p><b>The image as written back to a file after converting back to binary
using BinaryDecode</b><br>
<img src="C:\temp\help.gif"><br>
</cfoutput>
</cfif>
<!--- The input form. --->
<form action="#CGI.SCRIPT_NAME#" method="post">
<b>Select binary encoding</b><br>
<select size="1" name="binEncoding" >
<option selected>UU</option>
<option>Base64</option>
<option>Hex</option>
</select><br>
<br>
<input type = "Submit" value = "convert my data">
</form>
BinaryEncode 497