– Common Function Library Project

readPropertiesFile(filepath[, varScope])

Last updated September 1, 2010


Chris Carey

Version: 1 | Requires: CF6 | Library: UtilityLib

Read a properties file (such as an ANT build props file) and return a structure. Properties file contain one entry per line in this format: #comment starts with hash variable=value variable2=value2 # you may assign placeholders for other struct keys foo=one bar=${foo} # this will take the value of foo

Return Values:
Returns a structure.


stProps = readPropertiesFile(ExpandPath('./'));

Example 2: pass in a structure to use for external values

properties file:

stProps = readPropertiesFile(ExpandPath('./', variables));

stProps will contain the key "foo" with value "hello"

Notice: Why not use ColdFusion's built in INI file functions? They require sections and do not support recognizing comments.


Name Description Required
filepath Path to the properties file. Yes
varScope A structure containing variables that can be used as token replacements within the properties file. No

Full UDF Source:

 Load and parse a .properties file into a struct
 @param filepath 	 Path to the properties file. (Required)
 @param varScope 	 A structure containing variables that can be used as token replacements within the properties file. (Optional)
 @return Returns a structure. 
 @author Chris Carey ( 
 @version 1, September 1, 2010 
<cffunction name="readPropertiesFile" output="true" returnType="Struct" hint="Read a properties file and return a structure">
    <cfargument name="filePath" type="string" required="true" hint="path to properties file">
	<cfargument name="varScope" type="Struct" required="false" hint="optional variable scope for value replacement">

    <cfset VAR stProps = StructNew()>
	<cfset VAR sProps = "">
	<cfset VAR i=0>
	<cfset VAR prop = "">
	<cfset VAR value = "">
	<cfset VAR line = "">
	<cfset VAR aMatch = ArrayNew(1)>

	<cfif NOT FileExists(arguments.filePath)>
		<cfreturn stProps>
	<!--- read props file --->
	<cffile action="read" file="#arguments.filePath#" variable="sProps">

	<!--- remove any whitespace at top and tail --->
	<cfset sProps = trim(sProps)>

	<!--- remove comments and blank lines --->
	<cfset sProps = ReReplace(sProps,"(?m)\##.*?$", "","all")>
	<cfset sProps = ReReplace(sProps,"[#Chr(13)##Chr(10)#]{2,}", "#Chr(13)##Chr(10)#","all")>

	<!--- loop over each line, ignore comments (#...) and insert keys/values into return struct --->
	<cfloop list="#sProps#" index="line" delimiters="#CHR(10)##CHR(13)#">
		<cfset line = trim(line)>
		<cfif LEN(line) AND line CONTAINS "=">
			<cfset prop = trim(ListFirst(line,"="))>
			<cfset value = trim(ListRest(line,"="))>
			<!--- parse value for other keys like ${foo} and replace from previously created struct keys --->
			<cfset aMatch = REMatch("\${.*?}",value)>
			<cfloop from="1" to="#ArrayLen(aMatch)#" index="i">
				<cfset aMatch[i] = ReReplace(aMatch[i],"\${(.*)?}", "\1")>
				<cfif StructKeyExists(stProps, aMatch[i])>
					<cfset value = ReplaceNoCase(value, "${#aMatch[i]#}", stProps[aMatch[i]], "all")>
				<cfelseif IsDefined("arguments.varScope")
							AND ListFirst(aMatch[i],".") eq "vars"
							AND StructKeyExists(arguments.varScope, ListRest(aMatch[i], "."))>
					<cfset value = ReplaceNoCase(value, "${#aMatch[i]#}", arguments.varScope[ListRest(aMatch[i], ".")], "all")>
			<cfset stProps[prop] = value>

	<cfreturn stProps>
blog comments powered by Disqus


Latest Additions

Kevin Cotton added
May 5, 2016

Raymond Camden added
April 25, 2016

Chris Wigginton added
January 18, 2016

Gary Stanton added
November 19, 2015

Sebastiaan Naafs - van Dijk added
November 13, 2015

Created by Raymond Camden / Design by Justin Johnson