Fix unsupported param type url.URL

 closes #583

huma.go

@@ -16,6 +16,7 @@ import (
 	"io"
 	"net"
 	"net/http"
+	"net/url"
 	"reflect"
 	"regexp"
 	"slices"
@@ -1127,6 +1128,16 @@ func Register[I, O any](api API, op Operation, handler func(context.Context, *I)
 						f.Set(reflect.ValueOf(t))
 						pv = value
 						break
+						// Special case: url.URL
+					} else if f.Type() == urlType {
+						u, err := url.Parse(value)
+						if err != nil {
+							res.Add(pb, value, "invalid url.URL value")
+							return
+						}
+						f.Set(reflect.ValueOf(*u))
+						pv = value
+						break
 					}
 
 					// Last resort: use the `encoding.TextUnmarshaler` interface.

huma_test.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/http/httputil"
+	"net/url"
 	"os"
 	"strings"
 	"testing"
@@ -434,6 +435,7 @@ func TestFeatures(t *testing.T) {
 					QueryFloat    float32   `query:"float"`
 					QueryBefore   time.Time `query:"before"`
 					QueryDate     time.Time `query:"date" timeFormat:"2006-01-02"`
+					QueryURL      url.URL   `query:"url"`
 					QueryUint     uint32    `query:"uint"`
 					QueryBool     bool      `query:"bool"`
 					QueryInts     []int     `query:"ints"`
@@ -454,14 +456,15 @@ func TestFeatures(t *testing.T) {
 				})
 			},
 			Method: http.MethodGet,
-			URL:    "/test-params/bad/not-a-uuid?int=bad&float=bad&before=bad&date=bad&uint=bad&bool=bad&ints=bad&ints8=bad&ints16=bad&ints32=bad&ints64=bad&uints=bad&uints16=bad&uints32=bad&uints64=bad&floats32=bad&floats64=bad",
+			URL:    "/test-params/bad/not-a-uuid?int=bad&float=bad&before=bad&date=bad&url=:&uint=bad&bool=bad&ints=bad&ints8=bad&ints16=bad&ints32=bad&ints64=bad&uints=bad&uints16=bad&uints32=bad&uints64=bad&floats32=bad&floats64=bad",
 			Assert: func(t *testing.T, resp *httptest.ResponseRecorder) {
 				assert.Equal(t, http.StatusUnprocessableEntity, resp.Code)
 
 				assert.Contains(t, resp.Body.String(), "invalid integer")
 				assert.Contains(t, resp.Body.String(), "invalid value: invalid UUID length: 10")
 				assert.Contains(t, resp.Body.String(), "invalid float")
 				assert.Contains(t, resp.Body.String(), "invalid date/time")
+				assert.Contains(t, resp.Body.String(), "invalid url.URL")
 				assert.Contains(t, resp.Body.String(), "invalid bool")
 				assert.Contains(t, resp.Body.String(), "required query parameter is missing")
 				assert.Contains(t, resp.Body.String(), "required header parameter is missing")