BarneyBlog

I needed to read in some gzipped text files from disk, so I wrote a little UDF to do it for me, and thought I'd share.  It uses Java to do the heavy lifting under the hood:

<cffunction name="readGZippedText" output="false" returntype="string">
  <cfargument name="filename" type="string" required="true" />
  <cfset var data = "" />
  <cfset var stream = "" />
  <cfset var text = "" />
  <cfset var s = structNew() />
  <cffile action="readbinary"
    file="#filename#"
    variable="data" />
  <cfscript>
    stream =
      createObject("java", "java.io.BufferedReader").init(
        createObject("java", "java.io.InputStreamReader").init(
          createObject("java", "java.util.zip.GZIPInputStream").init(
            createObject("java", "java.io.ByteArrayInputStream").init(data)
          )
        )
      )
    ;
    text = createObject("java", "java.lang.StringBuffer").init();
    while (true) {
      s.line = stream.readLine();
      if (NOT structKeyExists(s, "line")) {
        break;
      }
      text.append(s.line).append(chr(10));
    }
  </cfscript>
  <cfreturn text />
</cffunction>

The code isn't very complex, just reads in the data with CFFILE, uses the native Java zip and IO stuff to get a text stream, and then reads that into a StringBuffer (for performance reasons) before returning it.