nginx rewrite for an url with parameters

Question

I have an URL of this type:

http://www.example.com/?param1=val1&param2=&param3=val3&param4=val4&param5=val5

And I want to redirect it to this one:

http://www.example.com/newparam/val3/val4

So I have tried this rewrite rule with no success:

rewrite "/?param1=val1&param2=&param3=(.+)&param4=(.+)&param5=(.+)" http://www.example.com/newparam/$1/$2 redirect;

Is nginx not able to deal with query parameters?

EDIT: I don't want to rewrite all petitions. I only need to rewrite that URL, without affecting the others.

Answer 1

Ok, thanks to the initial help of rzab, I have redefined his rule to this working solution:

location / {
    if ($args ~* "/?param1=val1&param2=&param3=[0-9]+&param4=.+&param5=[0-9]+") {
        rewrite ^ http://www.example.com/newparam/$arg_param3/$arg_param4? last;
    }
}

I just added a condition to avoid infinite recursion, and a ? at the end of the rule to get rid of the initial params. It works perfectly :)

Answer 2

location = / {
  rewrite ^ http://www.example.com/newparam/$arg_param3/$arg_param4;
}

Answer 3

if is rather limited. It does not support conjunction, so the only way to replace and is to write nested ifs:

location / {
  if ($arg_param1 = "val1") {
    if ($arg_param2 = "") {
      if ($arg_param3 ~* "[0-9]+") {
        if ($arg_param4 ~* ".+") {
          if ($arg_param5 ~* "[0-9]+") {
            rewrite ^ http://www.example.com/newparam/$arg_param3/$arg_param4? last;
          }
        }
      }
    }
  }
}