help with regex, forward slash is skipped

[mc]

Hello,
I'm trying to parse ftp URI using scala regular expressions. My URI looks like this:
val uri="ftp://user:pass...@server.com/directory/file.xml"

My regex looks like this (according to URI spec):
val Regex = """^ftp://(.*):(.*)@(.*)/(.*)""".r

However when I match by this regex URI is not parsed correctly:
uri match {
case Regex(userName,password,host,fileName) => ...
}

userName > user
password > password
host > server.com/directory
fileName > file.xml

I'm not sure why regex recognizes two forward slashes, but not one forward slash?
I'd like to get this back:

host > server.com
fileName > directory/file.xml

I'd appreciate any help in this matter.
Regards,

M

[Ryan LeCompte]

Your (.*) match is a little too greedy. This works:

scala> val R = """^ftp://(.*):(.*)@([^/]*)/(.*)""".r

scala> val R(name, password, host, file) = "ftp://user:pass...@server.com/directory/file.xml"

name: String = user

password: String = password

host: String = server.com

file: String = directory/file.xml

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[Som Snytt]

You can also make it less greedy with the uncertainty operator, ?

Your example followed by the amendment:

scala> val uri="ftp://user:pass...@server.com/directory/file.xml"
uri: String = ftp://user:pass...@server.com/directory/file.xml

scala> val Regex = """^ftp://(.*):(.*)@(.*)/(.*)""".r
Regex: scala.util.matching.Regex = ^ftp://(.*):(.*)@(.*)/(.*)

scala> def f1 = uri match {
     | case Regex(userName,password,host,fileName) =>
     | fileName
     | }
f1: String

scala> f1
res0: String = file.xml

scala> val Regex2 = """^ftp://(.*):(.*)@(.*?)/(.*)""".r
Regex2: scala.util.matching.Regex = ^ftp://(.*):(.*)@(.*?)/(.*)

scala> def f2 = uri match {
     | case Regex2(userName,password,host,fileName) => fileName
     | }
f2: String

scala> f2
res1: String = directory/file.xml

[Som Snytt]

> Your (.*) match is a little too greedy.

And is there really such a thing as a little too greedy?

http://en.wikipedia.org/wiki/Greed

On Fri, May 17, 2013 at 11:23 AM, Ryan LeCompte <leco...@gmail.com> wrote: