add form

http/rest/generic.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"log/slog"
 	"net/http"
+	"strings"
 	"time"
 
 	"github.com/ggicci/httpin"
@@ -34,7 +35,6 @@ func Handle[In any, Out any](fn UnaryFunc[In, Out]) func(w http.ResponseWriter,
 	handleName := getHandleName(fn)
 
 	f := func(w http.ResponseWriter, r *http.Request) {
-		r.Header.Set("Content-Type", "application/json")
 		st := time.Now()
 		var err error
 		defer func() {
@@ -139,6 +139,11 @@ func decodeReq[T any](r *http.Request) (*T, error) {
 		return in, nil
 	}
 
+	// 处理表单请求
+	if strings.Contains(r.Header.Get("Content-Type"), "application/x-www-form-urlencoded") {
+		return in, nil
+	}
+
 	// Post 请求等, 从body中获取
 	body, err := io.ReadAll(r.Body)
 	if err != nil {