fix gemini

controller/relay-text.go

@@ -414,14 +414,19 @@ func relayTextHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
 			}
 		case APITypeTencent:
 			req.Header.Set("Authorization", apiKey)
+		case APITypeGemini:
+			req.Header.Set("Content-Type", "application/json")
 		default:
 			req.Header.Set("Authorization", "Bearer "+apiKey)
 		}
+		if apiType != APITypeGemini {
+			// 设置公共头部...
 			req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
 			req.Header.Set("Accept", c.Request.Header.Get("Accept"))
 			if isStream && c.Request.Header.Get("Accept") == "" {
 				req.Header.Set("Accept", "text/event-stream")
 			}
+		}
 		//req.HeaderBar.Set("Connection", c.Request.HeaderBar.Get("Connection"))
 		resp, err = httpClient.Do(req)
 		if err != nil {