Clojure building of URL from constituent parts

Question

In Python I would do the following:

>>> q = urllib.urlencode({"q": "clojure url"})
>>> q
'q=clojure+url'

>>> url = "http://stackoverflow.com/search?" + q
>>> url
'http://stackoverflow.com/search?q=clojure+url'

How do I do all the encoding that's done for me above in Clojure? In other words, how do I do something akin to the following:

=> (build-url "http://stackoverflow.com/search" {"q" "clojure url"})
"http://stackoverflow.com/search?q=clojure+url"

Answer 1

Here's one way:

user=> (import [java.net URLEncoder])                                                      
java.net.URLEncoder
user=> (str "http://stackoverflow.com/search?q=" (URLEncoder/encode "clojure url" "UTF-8"))
"http://stackoverflow.com/search?q=clojure+url"

I know this is not exactly the same as your Python snippet though. Please see the following post from the Clojure mailing list for a more complete answer:

http://www.mail-archive.com/[email protected]/msg29338.html

The code from there will allow you to do this:

user=> (encode-params {"q" "clojure url"})
"q=clojure+url"