feat: add OpenAI compatible channel (close #2091)

relay/adaptor/openai/helper.go

@@ -17,6 +17,9 @@ func ResponseText2Usage(responseText string, modelName string, promptTokens int)
 }
 
 func GetFullRequestURL(baseURL string, requestURL string, channelType int) string {
+	if channelType == channeltype.OpenAICompatible {
+		return fmt.Sprintf("%s%s", strings.TrimSuffix(baseURL, "/"), strings.TrimPrefix(requestURL, "/v1"))
+	}
 	fullRequestURL := fmt.Sprintf("%s%s", baseURL, requestURL)
 
 	if strings.HasPrefix(baseURL, "https://gateway.ai.cloudflare.com") {

relay/channeltype/define.go

@@ -51,5 +51,6 @@ const (
 	BaiduV2
 	XunfeiV2
 	AliBailian
+	OpenAICompatible
 	Dummy
 )

relay/channeltype/url.go

@@ -51,6 +51,7 @@ var ChannelBaseURLs = []string{
 	"https://qianfan.baidubce.com",              // 47
 	"https://spark-api-open.xf-yun.com",         // 48
 	"https://dashscope.aliyuncs.com",            // 49
+	"",                                          // 50
 }
 
 func init() {