Java Exploration in ColdFusion: java.net.URL

Posted September 28, 2006 at 9:29 AM by Ben Nadel

Tags: ColdFusion

I was looking at Dan G. Switzer, II's post about parsing a URI when it got me thinking: Java has so much awesome stuff, what do they have for URLs. It turns out, there is a java.net.URL class that is all about parsing out URL information. I took it for a spin.

First, I created a URL:

  • <!--- Set the URL. --->
  • <cfset strUrl = (
  • "http://ben:nadel@www.college-cuties.com:80/" &
  • "freshman-girls/brunettes.cfm" &
  • "?single=true&min_hotness=7" &
  • "##getstarted"
  • ) />

I tried to put as much info into the URL as I could to see how it all got parsed out. Then, I created a URL object and initialized it with the given Url:

  • <!--- Create a Java URL. --->
  • <cfset jUrl = CreateObject( "java", "java.net.URL" ).Init(
  • strUrl
  • ) />

The java.net.URL has a bunch of classes that can all be found in the Java 2 documentation. Here is what each of them does when called on the previously created jUrl object:

jUrl.getAuthority()

ben:nadel@www.college-cuties.com:80

jUrl.getContent()

sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@1d4267d

jUrl.getDefaultPort()

80

jUrl.getFile()

/freshman-girls/brunettes.cfm?single=true&min_hotness=7

jUrl.getHost()

www.college-cuties.com

jUrl.getPath()

/freshman-girls/brunettes.cfm

jUrl.getPort()

80

jUrl.getProtocol()

http

jUrl.getQuery()

single=true&min_hotness=7

jUrl.getRef()

getstarted

jUrl.getUserInfo()

ben:nadel

jUrl.toExternalForm()

http://ben:nadel@www.college-cuties.com:80/freshman-girls/ brunettes.cfm?single=true&min_hotness=7#getstarted

That's some pretty cool stuff. I guess most of this is available via the CGI variables, but it's nice to know you can create objects. You can all get the content of the target page of the given URL in this method, but I haven't had time to play with that yet.



Reader Comments

Yaron Kohn
Nov 5, 2008 at 11:26 AM // reply »
5 Comments
31 Points

Hey Ben....
Thanks for this. Saved me a lot of coding time. Keep up the good work.

See you at CFUnited 09
Yaron


Ben Nadel
Nov 5, 2008 at 11:28 AM // reply »
11,243 Comments
75,390 Points

@Yaron,

Glad to help out. How's Florida treating you?


Yaron Kohn
Nov 5, 2008 at 12:37 PM // reply »
5 Comments
31 Points

Beautiful...Low 80's & Sunny...But I'll be visiting NY next month...Not looking forward to a bone chill.


Ben Nadel
Nov 5, 2008 at 12:44 PM // reply »
11,243 Comments
75,390 Points

Damn you :) If you wanna grab lunch or anything when you're here, feel free to hit me up.


Molnfront
Aug 18, 2011 at 10:43 AM // reply »
1 Comments
10 Points

Those Java methods realy saves time! I had to convert punycode to IDN. It was very simple when I found the right class (borowed a bit from your code..):

  • <cfset strUrl = "xn--land-poa.se" />
  •  
  • <!--- Create a Java URL. --->
  • <cfset jUrl = CreateObject( "java", "java.net.IDN" ).toUnicode(strUrl) />
  •  
  • <cfoutput>
  • #jUrl#
  • </cfoutput>


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