gemini text generation

middleware/auth.go

@@ -1,13 +1,14 @@
 package middleware
 
 import (
-	"github.com/gin-contrib/sessions"
-	"github.com/gin-gonic/gin"
 	"net/http"
 	"one-api/common"
 	"one-api/model"
 	"strconv"
 	"strings"
+
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-gonic/gin"
 )
 
 func validUserInfo(username string, role int) bool {
@@ -182,6 +183,13 @@ func TokenAuth() func(c *gin.Context) {
 				c.Request.Header.Set("Authorization", "Bearer "+key)
 			}
 		}
+		// gemini api 从query中获取key
+		if strings.HasPrefix(c.Request.URL.Path, "/v1beta/models/") {
+			skKey := c.Query("key")
+			if skKey != "" {
+				c.Request.Header.Set("Authorization", "Bearer "+skKey)
+			}
+		}
 		key := c.Request.Header.Get("Authorization")
 		parts := make([]string, 0)
 		key = strings.TrimPrefix(key, "Bearer ")

middleware/distributor.go

@@ -162,6 +162,14 @@ func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
 		}
 		c.Set("platform", string(constant.TaskPlatformSuno))
 		c.Set("relay_mode", relayMode)
+	} else if strings.HasPrefix(c.Request.URL.Path, "/v1beta/models/") {
+		// Gemini API 路径处理: /v1beta/models/gemini-2.0-flash:generateContent
+		relayMode := relayconstant.RelayModeGemini
+		modelName := extractModelNameFromGeminiPath(c.Request.URL.Path)
+		if modelName != "" {
+			modelRequest.Model = modelName
+		}
+		c.Set("relay_mode", relayMode)
 	} else if !strings.HasPrefix(c.Request.URL.Path, "/v1/audio/transcriptions") && !strings.HasPrefix(c.Request.URL.Path, "/v1/images/edits") {
 		err = common.UnmarshalBodyReusable(c, &modelRequest)
 	}
@@ -244,3 +252,31 @@ func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, mode
 		c.Set("bot_id", channel.Other)
 	}
 }
+
+// extractModelNameFromGeminiPath 从 Gemini API URL 路径中提取模型名
+// 输入格式: /v1beta/models/gemini-2.0-flash:generateContent
+// 输出: gemini-2.0-flash
+func extractModelNameFromGeminiPath(path string) string {
+	// 查找 "/models/" 的位置
+	modelsPrefix := "/models/"
+	modelsIndex := strings.Index(path, modelsPrefix)
+	if modelsIndex == -1 {
+		return ""
+	}
+
+	// 从 "/models/" 之后开始提取
+	startIndex := modelsIndex + len(modelsPrefix)
+	if startIndex >= len(path) {
+		return ""
+	}
+
+	// 查找 ":" 的位置，模型名在 ":" 之前
+	colonIndex := strings.Index(path[startIndex:], ":")
+	if colonIndex == -1 {
+		// 如果没有找到 ":"，返回从 "/models/" 到路径结尾的部分
+		return path[startIndex:]
+	}
+
+	// 返回模型名部分
+	return path[startIndex : startIndex+colonIndex]
+}