How do you URL encode parameters in Erlang?

At least in R15 there is http_uri:encode/1 which does the job. I would also not recommend using edoc_lib:escape_uri as its translating an '=' to a %3d instead of a %3D which caused me some trouble.

I encountered the lack of this feature in the HTTP modules as well.

It turns out that this functionality is actually available in the erlang distribution, you just gotta look hard enough.

> edoc_lib:escape_uri("[email protected]").
"luca%2bmore%40here.com"

This behaves like CGI.escape in Ruby, there is also URI.escape which behaves slightly differently:

> CGI.escape("[email protected]")
 => "luca%2Bmore%40here.com" 
> URI.escape("[email protected]")
 => "[email protected]" 

edoc_lib