feat: support Gemini openai compatible api

relay/adaptor/gemini/constants.go

@@ -1,18 +1,12 @@
 package gemini
 
+import (
+	"github.com/songquanpeng/one-api/relay/adaptor/geminiv2"
+)
+
 // https://ai.google.dev/models/gemini
 
-var ModelList = []string{
-	"gemini-pro", "gemini-1.0-pro",
-	// "gemma-2-2b-it", "gemma-2-9b-it", "gemma-2-27b-it",
-	"gemini-1.5-flash", "gemini-1.5-flash-8b",
-	"gemini-1.5-pro", "gemini-1.5-pro-experimental",
-	"text-embedding-004", "aqa",
-	"gemini-2.0-flash", "gemini-2.0-flash-exp",
-	"gemini-2.0-flash-lite-preview-02-05",
-	"gemini-2.0-flash-thinking-exp-01-21",
-	"gemini-2.0-pro-exp-02-05",
-}
+var ModelList = geminiv2.ModelList
 
 // ModelsSupportSystemInstruction is the list of models that support system instruction.
 //

relay/adaptor/geminiv2/constants.go

@@ -0,0 +1,15 @@
+package geminiv2
+
+// https://ai.google.dev/models/gemini
+
+var ModelList = []string{
+	"gemini-pro", "gemini-1.0-pro",
+	// "gemma-2-2b-it", "gemma-2-9b-it", "gemma-2-27b-it",
+	"gemini-1.5-flash", "gemini-1.5-flash-8b",
+	"gemini-1.5-pro", "gemini-1.5-pro-experimental",
+	"text-embedding-004", "aqa",
+	"gemini-2.0-flash", "gemini-2.0-flash-exp",
+	"gemini-2.0-flash-lite-preview-02-05",
+	"gemini-2.0-flash-thinking-exp-01-21",
+	"gemini-2.0-pro-exp-02-05",
+}

relay/adaptor/geminiv2/main.go

@@ -0,0 +1,14 @@
+package geminiv2
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/songquanpeng/one-api/relay/meta"
+)
+
+func GetRequestURL(meta *meta.Meta) (string, error) {
+	baseURL := strings.TrimSuffix(meta.BaseURL, "/")
+	requestPath := strings.TrimPrefix(meta.RequestURLPath, "/v1")
+	return fmt.Sprintf("%s%s", baseURL, requestPath), nil
+}

relay/adaptor/openai/adaptor.go

@@ -13,6 +13,7 @@ import (
 	"github.com/songquanpeng/one-api/relay/adaptor/alibailian"
 	"github.com/songquanpeng/one-api/relay/adaptor/baiduv2"
 	"github.com/songquanpeng/one-api/relay/adaptor/doubao"
+	"github.com/songquanpeng/one-api/relay/adaptor/geminiv2"
 	"github.com/songquanpeng/one-api/relay/adaptor/minimax"
 	"github.com/songquanpeng/one-api/relay/adaptor/novita"
 	"github.com/songquanpeng/one-api/relay/channeltype"
@@ -59,6 +60,8 @@ func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
 		return baiduv2.GetRequestURL(meta)
 	case channeltype.AliBailian:
 		return alibailian.GetRequestURL(meta)
+	case channeltype.GeminiOpenAICompatible:
+		return geminiv2.GetRequestURL(meta)
 	default:
 		return GetFullRequestURL(meta.BaseURL, meta.RequestURLPath, meta.ChannelType), nil
 	}

relay/adaptor/openai/compatible.go

@@ -7,6 +7,7 @@ import (
 	"github.com/songquanpeng/one-api/relay/adaptor/baiduv2"
 	"github.com/songquanpeng/one-api/relay/adaptor/deepseek"
 	"github.com/songquanpeng/one-api/relay/adaptor/doubao"
+	"github.com/songquanpeng/one-api/relay/adaptor/geminiv2"
 	"github.com/songquanpeng/one-api/relay/adaptor/groq"
 	"github.com/songquanpeng/one-api/relay/adaptor/lingyiwanwu"
 	"github.com/songquanpeng/one-api/relay/adaptor/minimax"
@@ -82,6 +83,8 @@ func GetCompatibleChannelMeta(channelType int) (string, []string) {
 		return "openrouter", openrouter.ModelList
 	case channeltype.AliBailian:
 		return "alibailian", alibailian.ModelList
+	case channeltype.GeminiOpenAICompatible:
+		return "geminiv2", geminiv2.ModelList
 	default:
 		return "openai", ModelList
 	}

relay/channeltype/define.go

@@ -52,5 +52,6 @@ const (
 	XunfeiV2
 	AliBailian
 	OpenAICompatible
+	GeminiOpenAICompatible
 	Dummy
 )

relay/channeltype/url.go

@@ -52,6 +52,8 @@ var ChannelBaseURLs = []string{
 	"https://spark-api-open.xf-yun.com",         // 48
 	"https://dashscope.aliyuncs.com",            // 49
 	"",                                          // 50
+
+	"https://generativelanguage.googleapis.com/v1beta/openai/", // 51
 }
 
 func init() {

web/default/src/constants/channel.constants.js

@@ -7,11 +7,18 @@ export const CHANNEL_OPTIONS = [
     color: 'olive',
     description: 'OpenAI 兼容渠道，支持设置 Base URL',
   },
-  { key: 14, text: 'Anthropic Claude', value: 14, color: 'black' },
+  {key: 14, text: 'Anthropic', value: 14, color: 'black'},
   { key: 33, text: 'AWS', value: 33, color: 'black' },
-  { key: 3, text: 'Azure OpenAI', value: 3, color: 'olive' },
-  { key: 11, text: 'Google PaLM2', value: 11, color: 'orange' },
-  { key: 24, text: 'Google Gemini', value: 24, color: 'orange' },
+  {key: 3, text: 'Azure', value: 3, color: 'olive'},
+  {key: 11, text: 'PaLM2', value: 11, color: 'orange'},
+  {key: 24, text: 'Gemini', value: 24, color: 'orange'},
+  {
+    key: 51,
+    text: 'Gemini (OpenAI)',
+    value: 51,
+    color: 'orange',
+    description: 'Gemini OpenAI 兼容格式',
+  },
   { key: 28, text: 'Mistral AI', value: 28, color: 'orange' },
   { key: 41, text: 'Novita', value: 41, color: 'purple' },
   {