You can use closures:

  func SomeHandler(foo Foo) {
  	return func(w http.ResponseWriter, req *http.Request) {
  		// use foo
  	}
  }
  // later, during init
  http.HandleFunc("/foo", SomeHandler(someFoo))

or method values, introduced in go 1.1:

  type handler struct {
  	foo Foo
  }

  func (h *handler) bar(w http.ResponseWriter, req *http.Request) {
  	// use h.foo
  }

  func (h *handler) qux(w http.ResponseWriter, req *http.Request) {
  	// use h.foo
  }

  // later
  h := handler{
  	foo: someFoo,
  }
  http.HandleFunc("/bar", h.bar)
  http.HandleFunc("/qux", h.qux)