UriParamsIter

Initializes an attribute/value pair iterator.

The iterator keeps pointers to the params and separators arguments, those variables must thus outlive the iterator and not be modified during the iteration.

If g_uri_params_www_form is passed in flags, `+` characters in the param string will be replaced with spaces in the output. For example, `foo=bar+baz` will give attribute `foo` with value `bar baz`. This is commonly used on the web (the `https` and `http` schemes only), but is deprecated in favour of the equivalent of encoding spaces as `20`.

Unlike with parse_params, g_uri_params_case_insensitive has no effect if passed to flags for UriParamsIter. The caller is responsible for doing their own case-insensitive comparisons.

GUriParamsIter iter;
GError *error = NULL;
gchar *unowned_attr, *unowned_value;

g_uri_params_iter_init (&iter, "foo=bar&baz=bar&Foo=frob&baz=bar2", -1, "&", G_URI_PARAMS_NONE);
while (g_uri_params_iter_next (&iter, &unowned_attr, &unowned_value, &error))
  {
    g_autofree gchar *attr = g_steal_pointer (&unowned_attr);
    g_autofree gchar *value = g_steal_pointer (&unowned_value);
    // do something with attr and value; this code will be called 4 times
    // for the params string in this example: once with attr=foo and value=bar,
    // then with baz/bar, then Foo/frob, then baz/bar2.
  }
if (error)
  // handle parsing error

Parameters: