feat: add Proxy channel type and relay mode (#1678)

Add the Proxy channel type and relay mode to support proxying requests to custom upstream services.

controller/relay.go

@@ -34,6 +34,8 @@ func relayHelper(c *gin.Context, relayMode int) *model.ErrorWithStatusCode {
 		fallthrough
 	case relaymode.AudioTranscription:
 		err = controller.RelayAudioHelper(c, relayMode)
+	case relaymode.Proxy:
+		err = controller.RelayProxyHelper(c, relayMode)
 	default:
 		err = controller.RelayTextHelper(c)
 	}
@@ -85,12 +87,15 @@ func Relay(c *gin.Context) {
 		channelId := c.GetInt(ctxkey.ChannelId)
 		lastFailedChannelId = channelId
 		channelName := c.GetString(ctxkey.ChannelName)
+		// BUG: bizErr is in race condition
 		go processChannelRelayError(ctx, userId, channelId, channelName, bizErr)
 	}
 	if bizErr != nil {
 		if bizErr.StatusCode == http.StatusTooManyRequests {
 			bizErr.Error.Message = "当前分组上游负载已饱和，请稍后再试"
 		}
+
+		// BUG: bizErr is in race condition
 		bizErr.Error.Message = helper.MessageWithRequestId(bizErr.Error.Message, requestId)
 		c.JSON(bizErr.StatusCode, gin.H{
 			"error": bizErr.Error,

middleware/auth.go

@@ -140,6 +140,12 @@ func TokenAuth() func(c *gin.Context) {
 				return
 			}
 		}
+
+		// set channel id for proxy relay
+		if channelId := c.Param("channelid"); channelId != "" {
+			c.Set(ctxkey.SpecificChannelId, channelId)
+		}
+
 		c.Next()
 	}
 }

relay/adaptor.go

@@ -15,6 +15,7 @@ import (
 	"github.com/songquanpeng/one-api/relay/adaptor/ollama"
 	"github.com/songquanpeng/one-api/relay/adaptor/openai"
 	"github.com/songquanpeng/one-api/relay/adaptor/palm"
+	"github.com/songquanpeng/one-api/relay/adaptor/proxy"
 	"github.com/songquanpeng/one-api/relay/adaptor/tencent"
 	"github.com/songquanpeng/one-api/relay/adaptor/vertexai"
 	"github.com/songquanpeng/one-api/relay/adaptor/xunfei"
@@ -58,6 +59,8 @@ func GetAdaptor(apiType int) adaptor.Adaptor {
 		return &deepl.Adaptor{}
 	case apitype.VertexAI:
 		return &vertexai.Adaptor{}
+	case apitype.Proxy:
+		return &proxy.Adaptor{}
 	}
 	return nil
 }

relay/adaptor/proxy/adaptor.go

@@ -0,0 +1,89 @@
+package proxy
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pkg/errors"
+	"github.com/songquanpeng/one-api/relay/adaptor"
+	channelhelper "github.com/songquanpeng/one-api/relay/adaptor"
+	"github.com/songquanpeng/one-api/relay/meta"
+	"github.com/songquanpeng/one-api/relay/model"
+	relaymodel "github.com/songquanpeng/one-api/relay/model"
+)
+
+var _ adaptor.Adaptor = new(Adaptor)
+
+const channelName = "proxy"
+
+type Adaptor struct{}
+
+func (a *Adaptor) Init(meta *meta.Meta) {
+}
+
+func (a *Adaptor) ConvertRequest(c *gin.Context, relayMode int, request *model.GeneralOpenAIRequest) (any, error) {
+	return nil, errors.New("notimplement")
+}
+
+func (a *Adaptor) DoResponse(c *gin.Context, resp *http.Response, meta *meta.Meta) (usage *model.Usage, err *model.ErrorWithStatusCode) {
+	for k, v := range resp.Header {
+		for _, vv := range v {
+			c.Writer.Header().Set(k, vv)
+		}
+	}
+
+	c.Writer.WriteHeader(resp.StatusCode)
+	if _, gerr := io.Copy(c.Writer, resp.Body); gerr != nil {
+		return nil, &relaymodel.ErrorWithStatusCode{
+			StatusCode: http.StatusInternalServerError,
+			Error: relaymodel.Error{
+				Message: gerr.Error(),
+			},
+		}
+	}
+
+	return nil, nil
+}
+
+func (a *Adaptor) GetModelList() (models []string) {
+	return nil
+}
+
+func (a *Adaptor) GetChannelName() string {
+	return channelName
+}
+
+// GetRequestURL remove static prefix, and return the real request url to the upstream service
+func (a *Adaptor) GetRequestURL(meta *meta.Meta) (string, error) {
+	prefix := fmt.Sprintf("/v1/oneapi/proxy/%d", meta.ChannelId)
+	return meta.BaseURL + strings.TrimPrefix(meta.RequestURLPath, prefix), nil
+
+}
+
+func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta) error {
+	for k, v := range c.Request.Header {
+		req.Header.Set(k, v[0])
+	}
+
+	// remove unnecessary headers
+	req.Header.Del("Host")
+	req.Header.Del("Content-Length")
+	req.Header.Del("Accept-Encoding")
+	req.Header.Del("Connection")
+
+	// set authorization header
+	req.Header.Set("Authorization", meta.APIKey)
+
+	return nil
+}
+
+func (a *Adaptor) ConvertImageRequest(request *model.ImageRequest) (any, error) {
+	return nil, errors.Errorf("not implement")
+}
+
+func (a *Adaptor) DoRequest(c *gin.Context, meta *meta.Meta, requestBody io.Reader) (*http.Response, error) {
+	return channelhelper.DoRequestHelper(a, c, meta, requestBody)
+}

relay/apitype/define.go

@@ -18,6 +18,7 @@ const (
 	Cloudflare
 	DeepL
 	VertexAI
+	Proxy
 
 	Dummy // this one is only for count, do not add any channel after this
 )

relay/channeltype/define.go

@@ -44,5 +44,6 @@ const (
 	Doubao
 	Novita
 	VertextAI
+	Proxy
 	Dummy
 )

relay/channeltype/helper.go

@@ -37,6 +37,8 @@ func ToAPIType(channelType int) int {
 		apiType = apitype.DeepL
 	case VertextAI:
 		apiType = apitype.VertexAI
+	case Proxy:
+		apiType = apitype.Proxy
 	}
 
 	return apiType

relay/channeltype/url.go

@@ -44,6 +44,7 @@ var ChannelBaseURLs = []string{
 	"https://ark.cn-beijing.volces.com",         // 40
 	"https://api.novita.ai/v3/openai",           // 41
 	"",                                          // 42
+	"",                                          // 43
 }
 
 func init() {

relay/controller/proxy.go

@@ -0,0 +1,41 @@
+// Package controller is a package for handling the relay controller
+package controller
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/songquanpeng/one-api/common/logger"
+	"github.com/songquanpeng/one-api/relay"
+	"github.com/songquanpeng/one-api/relay/adaptor/openai"
+	"github.com/songquanpeng/one-api/relay/meta"
+	relaymodel "github.com/songquanpeng/one-api/relay/model"
+)
+
+// RelayProxyHelper is a helper function to proxy the request to the upstream service
+func RelayProxyHelper(c *gin.Context, relayMode int) *relaymodel.ErrorWithStatusCode {
+	ctx := c.Request.Context()
+	meta := meta.GetByContext(c)
+
+	adaptor := relay.GetAdaptor(meta.APIType)
+	if adaptor == nil {
+		return openai.ErrorWrapper(fmt.Errorf("invalid api type: %d", meta.APIType), "invalid_api_type", http.StatusBadRequest)
+	}
+	adaptor.Init(meta)
+
+	resp, err := adaptor.DoRequest(c, meta, c.Request.Body)
+	if err != nil {
+		logger.Errorf(ctx, "DoRequest failed: %s", err.Error())
+		return openai.ErrorWrapper(err, "do_request_failed", http.StatusInternalServerError)
+	}
+
+	// do response
+	_, respErr := adaptor.DoResponse(c, resp, meta)
+	if respErr != nil {
+		logger.Errorf(ctx, "respErr is not nil: %+v", respErr)
+		return respErr
+	}
+
+	return nil
+}

relay/meta/relay_meta.go

@@ -18,11 +18,12 @@ type Meta struct {
 	UserId       int
 	Group        string
 	ModelMapping map[string]string
-	BaseURL      string
-	APIKey       string
-	APIType      int
-	Config       model.ChannelConfig
-	IsStream     bool
+	// BaseURL is the proxy url set in the channel config
+	BaseURL  string
+	APIKey   string
+	APIType  int
+	Config   model.ChannelConfig
+	IsStream bool
 	// OriginModelName is the model name from the raw user request
 	OriginModelName string
 	// ActualModelName is the model name after mapping

relay/relaymode/define.go

@@ -11,4 +11,6 @@ const (
 	AudioSpeech
 	AudioTranscription
 	AudioTranslation
+	// Proxy is a special relay mode for proxying requests to custom upstream
+	Proxy
 )

relay/relaymode/helper.go

@@ -24,6 +24,8 @@ func GetByPath(path string) int {
 		relayMode = AudioTranscription
 	} else if strings.HasPrefix(path, "/v1/audio/translations") {
 		relayMode = AudioTranslation
+	} else if strings.HasPrefix(path, "/v1/oneapi/proxy") {
+		relayMode = Proxy
 	}
 	return relayMode
 }

router/relay.go

@@ -19,6 +19,7 @@ func SetRelayRouter(router *gin.Engine) {
 	relayV1Router := router.Group("/v1")
 	relayV1Router.Use(middleware.RelayPanicRecover(), middleware.TokenAuth(), middleware.Distribute())
 	{
+		relayV1Router.Any("/oneapi/proxy/:channelid/*target", controller.Relay)
 		relayV1Router.POST("/completions", controller.Relay)
 		relayV1Router.POST("/chat/completions", controller.Relay)
 		relayV1Router.POST("/edits", controller.Relay)

web/air/src/constants/channel.constants.js

@@ -1,10 +1,13 @@
 export const CHANNEL_OPTIONS = [
   { key: 1, text: 'OpenAI', value: 1, color: 'green' },
   { key: 14, text: 'Anthropic Claude', 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: 28, text: 'Mistral AI', value: 28, color: 'orange' },
+  { key: 41, text: 'Novita', value: 41, color: 'purple' },
+  { key: 40, text: '字节跳动豆包', value: 40, color: 'blue' },
   { key: 15, text: '百度文心千帆', value: 15, color: 'blue' },
   { key: 17, text: '阿里通义千问', value: 17, color: 'orange' },
   { key: 18, text: '讯飞星火认知', value: 18, color: 'blue' },
@@ -17,6 +20,15 @@ export const CHANNEL_OPTIONS = [
   { key: 29, text: 'Groq', value: 29, color: 'orange' },
   { key: 30, text: 'Ollama', value: 30, color: 'black' },
   { key: 31, text: '零一万物', value: 31, color: 'green' },
+  { key: 32, text: '阶跃星辰', value: 32, color: 'blue' },
+  { key: 34, text: 'Coze', value: 34, color: 'blue' },
+  { key: 35, text: 'Cohere', value: 35, color: 'blue' },
+  { key: 36, text: 'DeepSeek', value: 36, color: 'black' },
+  { key: 37, text: 'Cloudflare', value: 37, color: 'orange' },
+  { key: 38, text: 'DeepL', value: 38, color: 'black' },
+  { key: 39, text: 'together.ai', value: 39, color: 'blue' },
+  { key: 42, text: 'VertexAI', value: 42, color: 'blue' },
+  { key: 43, text: 'Proxy', value: 43, color: 'blue' },
   { key: 8, text: '自定义渠道', value: 8, color: 'pink' },
   { key: 22, text: '知识库：FastGPT', value: 22, color: 'blue' },
   { key: 21, text: '知识库：AI Proxy', value: 21, color: 'purple' },
@@ -34,4 +46,4 @@ export const CHANNEL_OPTIONS = [
 
 for (let i = 0; i < CHANNEL_OPTIONS.length; i++) {
   CHANNEL_OPTIONS[i].label = CHANNEL_OPTIONS[i].text;
-}
+}

web/berry/src/constants/ChannelConstants.js

@@ -167,6 +167,12 @@ export const CHANNEL_OPTIONS = {
     value: 42,
     color: 'primary'
   },
+  43: {
+    key: 43,
+    text: 'Proxy',
+    value: 43,
+    color: 'primary'
+  },
   41: {
     key: 41,
     text: 'Novita',

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

@@ -1,44 +1,45 @@
 export const CHANNEL_OPTIONS = [
-    {key: 1, text: 'OpenAI', value: 1, color: 'green'},
-    {key: 14, text: 'Anthropic Claude', 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: 28, text: 'Mistral AI', value: 28, color: 'orange'},
-    {key: 41, text: 'Novita', value: 41, color: 'purple'},
-    {key: 40, text: '字节跳动豆包', value: 40, color: 'blue'},
-    {key: 15, text: '百度文心千帆', value: 15, color: 'blue'},
-    {key: 17, text: '阿里通义千问', value: 17, color: 'orange'},
-    {key: 18, text: '讯飞星火认知', value: 18, color: 'blue'},
-    {key: 16, text: '智谱 ChatGLM', value: 16, color: 'violet'},
-    {key: 19, text: '360 智脑', value: 19, color: 'blue'},
-    {key: 25, text: 'Moonshot AI', value: 25, color: 'black'},
-    {key: 23, text: '腾讯混元', value: 23, color: 'teal'},
-    {key: 26, text: '百川大模型', value: 26, color: 'orange'},
-    {key: 27, text: 'MiniMax', value: 27, color: 'red'},
-    {key: 29, text: 'Groq', value: 29, color: 'orange'},
-    {key: 30, text: 'Ollama', value: 30, color: 'black'},
-    {key: 31, text: '零一万物', value: 31, color: 'green'},
-    {key: 32, text: '阶跃星辰', value: 32, color: 'blue'},
-    {key: 34, text: 'Coze', value: 34, color: 'blue'},
-    {key: 35, text: 'Cohere', value: 35, color: 'blue'},
-    {key: 36, text: 'DeepSeek', value: 36, color: 'black'},
-    {key: 37, text: 'Cloudflare', value: 37, color: 'orange'},
-    {key: 38, text: 'DeepL', value: 38, color: 'black'},
-    {key: 39, text: 'together.ai', value: 39, color: 'blue'},
-    {key: 42, text: 'VertexAI', value: 42, color: 'blue'},
-    {key: 8, text: '自定义渠道', value: 8, color: 'pink'},
-    {key: 22, text: '知识库：FastGPT', value: 22, color: 'blue'},
-    {key: 21, text: '知识库：AI Proxy', value: 21, color: 'purple'},
-    {key: 20, text: '代理：OpenRouter', value: 20, color: 'black'},
-    {key: 2, text: '代理：API2D', value: 2, color: 'blue'},
-    {key: 5, text: '代理：OpenAI-SB', value: 5, color: 'brown'},
-    {key: 7, text: '代理：OhMyGPT', value: 7, color: 'purple'},
-    {key: 10, text: '代理：AI Proxy', value: 10, color: 'purple'},
-    {key: 4, text: '代理：CloseAI', value: 4, color: 'teal'},
-    {key: 6, text: '代理：OpenAI Max', value: 6, color: 'violet'},
-    {key: 9, text: '代理：AI.LS', value: 9, color: 'yellow'},
-    {key: 12, text: '代理：API2GPT', value: 12, color: 'blue'},
-    {key: 13, text: '代理：AIGC2D', value: 13, color: 'purple'}
+    { key: 1, text: 'OpenAI', value: 1, color: 'green' },
+    { key: 14, text: 'Anthropic Claude', 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: 28, text: 'Mistral AI', value: 28, color: 'orange' },
+    { key: 41, text: 'Novita', value: 41, color: 'purple' },
+    { key: 40, text: '字节跳动豆包', value: 40, color: 'blue' },
+    { key: 15, text: '百度文心千帆', value: 15, color: 'blue' },
+    { key: 17, text: '阿里通义千问', value: 17, color: 'orange' },
+    { key: 18, text: '讯飞星火认知', value: 18, color: 'blue' },
+    { key: 16, text: '智谱 ChatGLM', value: 16, color: 'violet' },
+    { key: 19, text: '360 智脑', value: 19, color: 'blue' },
+    { key: 25, text: 'Moonshot AI', value: 25, color: 'black' },
+    { key: 23, text: '腾讯混元', value: 23, color: 'teal' },
+    { key: 26, text: '百川大模型', value: 26, color: 'orange' },
+    { key: 27, text: 'MiniMax', value: 27, color: 'red' },
+    { key: 29, text: 'Groq', value: 29, color: 'orange' },
+    { key: 30, text: 'Ollama', value: 30, color: 'black' },
+    { key: 31, text: '零一万物', value: 31, color: 'green' },
+    { key: 32, text: '阶跃星辰', value: 32, color: 'blue' },
+    { key: 34, text: 'Coze', value: 34, color: 'blue' },
+    { key: 35, text: 'Cohere', value: 35, color: 'blue' },
+    { key: 36, text: 'DeepSeek', value: 36, color: 'black' },
+    { key: 37, text: 'Cloudflare', value: 37, color: 'orange' },
+    { key: 38, text: 'DeepL', value: 38, color: 'black' },
+    { key: 39, text: 'together.ai', value: 39, color: 'blue' },
+    { key: 42, text: 'VertexAI', value: 42, color: 'blue' },
+    { key: 43, text: 'Proxy', value: 43, color: 'blue' },
+    { key: 8, text: '自定义渠道', value: 8, color: 'pink' },
+    { key: 22, text: '知识库：FastGPT', value: 22, color: 'blue' },
+    { key: 21, text: '知识库：AI Proxy', value: 21, color: 'purple' },
+    { key: 20, text: '代理：OpenRouter', value: 20, color: 'black' },
+    { key: 2, text: '代理：API2D', value: 2, color: 'blue' },
+    { key: 5, text: '代理：OpenAI-SB', value: 5, color: 'brown' },
+    { key: 7, text: '代理：OhMyGPT', value: 7, color: 'purple' },
+    { key: 10, text: '代理：AI Proxy', value: 10, color: 'purple' },
+    { key: 4, text: '代理：CloseAI', value: 4, color: 'teal' },
+    { key: 6, text: '代理：OpenAI Max', value: 6, color: 'violet' },
+    { key: 9, text: '代理：AI.LS', value: 9, color: 'yellow' },
+    { key: 12, text: '代理：API2GPT', value: 12, color: 'blue' },
+    { key: 13, text: '代理：AIGC2D', value: 13, color: 'purple' }
 ];