fix: support ali's embedding model (#481, close #469)

* feat:支持阿里的 embedding 模型

* fix: add to model list

---------

Co-authored-by: JustSong <songquanpeng@foxmail.com>
Co-authored-by: JustSong <39998050+songquanpeng@users.noreply.github.com>

controller/relay.go

@@ -44,6 +44,25 @@ type GeneralOpenAIRequest struct {
 	Functions   any       `json:"functions,omitempty"`
 }
 
+func (r GeneralOpenAIRequest) ParseInput() []string {
+	if r.Input == nil {
+		return nil
+	}
+	var input []string
+	switch r.Input.(type) {
+	case string:
+		input = []string{r.Input.(string)}
+	case []any:
+		input = make([]string, 0, len(r.Input.([]any)))
+		for _, item := range r.Input.([]any) {
+			if str, ok := item.(string); ok {
+				input = append(input, str)
+			}
+		}
+	}
+	return input
+}
+
 type ChatRequest struct {
 	Model     string    `json:"model"`
 	Messages  []Message `json:"messages"`