refactor: split the relay controller

controller/relay-image.go

+package controller
+
+import (
+	"github.com/gin-gonic/gin"
+	"io"
+	"net/http"
+)
+
+func relayImageHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
+	// TODO: this part is not finished
+	req, err := http.NewRequest(c.Request.Method, c.Request.RequestURI, c.Request.Body)
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return errorWrapper(err, "do_request_failed", http.StatusOK)
+	}
+	err = req.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
+	}
+	for k, v := range resp.Header {
+		c.Writer.Header().Set(k, v[0])
+	}
+	c.Writer.WriteHeader(resp.StatusCode)
+	_, err = io.Copy(c.Writer, resp.Body)
+	if err != nil {
+		return errorWrapper(err, "copy_response_body_failed", http.StatusOK)
+	}
+	err = resp.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+	}
+	return nil
+}

controller/relay-text.go

+package controller
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"io"
+	"net/http"
+	"one-api/common"
+	"one-api/model"
+	"strings"
+)
+
+func relayHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
+	channelType := c.GetInt("channel")
+	tokenId := c.GetInt("token_id")
+	consumeQuota := c.GetBool("consume_quota")
+	group := c.GetString("group")
+	var textRequest GeneralOpenAIRequest
+	if consumeQuota || channelType == common.ChannelTypeAzure || channelType == common.ChannelTypePaLM {
+		err := common.UnmarshalBodyReusable(c, &textRequest)
+		if err != nil {
+			return errorWrapper(err, "bind_request_body_failed", http.StatusBadRequest)
+		}
+	}
+	if relayMode == RelayModeModeration && textRequest.Model == "" {
+		textRequest.Model = "text-moderation-latest"
+	}
+	baseURL := common.ChannelBaseURLs[channelType]
+	requestURL := c.Request.URL.String()
+	if channelType == common.ChannelTypeCustom {
+		baseURL = c.GetString("base_url")
+	} else if channelType == common.ChannelTypeOpenAI {
+		if c.GetString("base_url") != "" {
+			baseURL = c.GetString("base_url")
+		}
+	}
+	fullRequestURL := fmt.Sprintf("%s%s", baseURL, requestURL)
+	if channelType == common.ChannelTypeAzure {
+		// https://learn.microsoft.com/en-us/azure/cognitive-services/openai/chatgpt-quickstart?pivots=rest-api&tabs=command-line#rest-api
+		query := c.Request.URL.Query()
+		apiVersion := query.Get("api-version")
+		if apiVersion == "" {
+			apiVersion = c.GetString("api_version")
+		}
+		requestURL := strings.Split(requestURL, "?")[0]
+		requestURL = fmt.Sprintf("%s?api-version=%s", requestURL, apiVersion)
+		baseURL = c.GetString("base_url")
+		task := strings.TrimPrefix(requestURL, "/v1/")
+		model_ := textRequest.Model
+		model_ = strings.Replace(model_, ".", "", -1)
+		// https://github.com/songquanpeng/one-api/issues/67
+		model_ = strings.TrimSuffix(model_, "-0301")
+		model_ = strings.TrimSuffix(model_, "-0314")
+		model_ = strings.TrimSuffix(model_, "-0613")
+		fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/%s", baseURL, model_, task)
+	} else if channelType == common.ChannelTypePaLM {
+		err := relayPaLM(textRequest, c)
+		return err
+	}
+	var promptTokens int
+	switch relayMode {
+	case RelayModeChatCompletions:
+		promptTokens = countTokenMessages(textRequest.Messages, textRequest.Model)
+	case RelayModeCompletions:
+		promptTokens = countTokenInput(textRequest.Prompt, textRequest.Model)
+	case RelayModeModeration:
+		promptTokens = countTokenInput(textRequest.Input, textRequest.Model)
+	}
+	preConsumedTokens := common.PreConsumedQuota
+	if textRequest.MaxTokens != 0 {
+		preConsumedTokens = promptTokens + textRequest.MaxTokens
+	}
+	modelRatio := common.GetModelRatio(textRequest.Model)
+	groupRatio := common.GetGroupRatio(group)
+	ratio := modelRatio * groupRatio
+	preConsumedQuota := int(float64(preConsumedTokens) * ratio)
+	if consumeQuota {
+		err := model.PreConsumeTokenQuota(tokenId, preConsumedQuota)
+		if err != nil {
+			return errorWrapper(err, "pre_consume_token_quota_failed", http.StatusOK)
+		}
+	}
+	req, err := http.NewRequest(c.Request.Method, fullRequestURL, c.Request.Body)
+	if err != nil {
+		return errorWrapper(err, "new_request_failed", http.StatusOK)
+	}
+	if channelType == common.ChannelTypeAzure {
+		key := c.Request.Header.Get("Authorization")
+		key = strings.TrimPrefix(key, "Bearer ")
+		req.Header.Set("api-key", key)
+	} else {
+		req.Header.Set("Authorization", c.Request.Header.Get("Authorization"))
+	}
+	req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
+	req.Header.Set("Accept", c.Request.Header.Get("Accept"))
+	req.Header.Set("Connection", c.Request.Header.Get("Connection"))
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		return errorWrapper(err, "do_request_failed", http.StatusOK)
+	}
+	err = req.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
+	}
+	err = c.Request.Body.Close()
+	if err != nil {
+		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
+	}
+	var textResponse TextResponse
+	isStream := strings.HasPrefix(resp.Header.Get("Content-Type"), "text/event-stream")
+	var streamResponseText string
+
+	defer func() {
+		if consumeQuota {
+			quota := 0
+			completionRatio := 1.34 // default for gpt-3
+			if strings.HasPrefix(textRequest.Model, "gpt-4") {
+				completionRatio = 2
+			}
+			if isStream {
+				responseTokens := countTokenText(streamResponseText, textRequest.Model)
+				quota = promptTokens + int(float64(responseTokens)*completionRatio)
+			} else {
+				quota = textResponse.Usage.PromptTokens + int(float64(textResponse.Usage.CompletionTokens)*completionRatio)
+			}
+			quota = int(float64(quota) * ratio)
+			if ratio != 0 && quota <= 0 {
+				quota = 1
+			}
+			quotaDelta := quota - preConsumedQuota
+			err := model.PostConsumeTokenQuota(tokenId, quotaDelta)
+			if err != nil {
+				common.SysError("Error consuming token remain quota: " + err.Error())
+			}
+			tokenName := c.GetString("token_name")
+			userId := c.GetInt("id")
+			model.RecordLog(userId, model.LogTypeConsume, fmt.Sprintf("通过令牌「%s」使用模型 %s 消耗 %d 点额度（模型倍率 %.2f，分组倍率 %.2f）", tokenName, textRequest.Model, quota, modelRatio, groupRatio))
+			model.UpdateUserUsedQuotaAndRequestCount(userId, quota)
+			channelId := c.GetInt("channel_id")
+			model.UpdateChannelUsedQuota(channelId, quota)
+		}
+	}()
+
+	if isStream {
+		scanner := bufio.NewScanner(resp.Body)
+		scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
+			if atEOF && len(data) == 0 {
+				return 0, nil, nil
+			}
+
+			if i := strings.Index(string(data), "\n\n"); i >= 0 {
+				return i + 2, data[0:i], nil
+			}
+
+			if atEOF {
+				return len(data), data, nil
+			}
+
+			return 0, nil, nil
+		})
+		dataChan := make(chan string)
+		stopChan := make(chan bool)
+		go func() {
+			for scanner.Scan() {
+				data := scanner.Text()
+				if len(data) < 6 { // must be something wrong!
+					common.SysError("Invalid stream response: " + data)
+					continue
+				}
+				dataChan <- data
+				data = data[6:]
+				if !strings.HasPrefix(data, "[DONE]") {
+					switch relayMode {
+					case RelayModeChatCompletions:
+						var streamResponse ChatCompletionsStreamResponse
+						err = json.Unmarshal([]byte(data), &streamResponse)
+						if err != nil {
+							common.SysError("Error unmarshalling stream response: " + err.Error())
+							return
+						}
+						for _, choice := range streamResponse.Choices {
+							streamResponseText += choice.Delta.Content
+						}
+					case RelayModeCompletions:
+						var streamResponse CompletionsStreamResponse
+						err = json.Unmarshal([]byte(data), &streamResponse)
+						if err != nil {
+							common.SysError("Error unmarshalling stream response: " + err.Error())
+							return
+						}
+						for _, choice := range streamResponse.Choices {
+							streamResponseText += choice.Text
+						}
+					}
+				}
+			}
+			stopChan <- true
+		}()
+		c.Writer.Header().Set("Content-Type", "text/event-stream")
+		c.Writer.Header().Set("Cache-Control", "no-cache")
+		c.Writer.Header().Set("Connection", "keep-alive")
+		c.Writer.Header().Set("Transfer-Encoding", "chunked")
+		c.Writer.Header().Set("X-Accel-Buffering", "no")
+		c.Stream(func(w io.Writer) bool {
+			select {
+			case data := <-dataChan:
+				if strings.HasPrefix(data, "data: [DONE]") {
+					data = data[:12]
+				}
+				c.Render(-1, common.CustomEvent{Data: data})
+				return true
+			case <-stopChan:
+				return false
+			}
+		})
+		err = resp.Body.Close()
+		if err != nil {
+			return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+		}
+		return nil
+	} else {
+		if consumeQuota {
+			responseBody, err := io.ReadAll(resp.Body)
+			if err != nil {
+				return errorWrapper(err, "read_response_body_failed", http.StatusOK)
+			}
+			err = resp.Body.Close()
+			if err != nil {
+				return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+			}
+			err = json.Unmarshal(responseBody, &textResponse)
+			if err != nil {
+				return errorWrapper(err, "unmarshal_response_body_failed", http.StatusOK)
+			}
+			if textResponse.Error.Type != "" {
+				return &OpenAIErrorWithStatusCode{
+					OpenAIError: textResponse.Error,
+					StatusCode:  resp.StatusCode,
+				}
+			}
+			// Reset response body
+			resp.Body = io.NopCloser(bytes.NewBuffer(responseBody))
+		}
+		// We shouldn't set the header before we parse the response body, because the parse part may fail.
+		// And then we will have to send an error response, but in this case, the header has already been set.
+		// So the client will be confused by the response.
+		// For example, Postman will report error, and we cannot check the response at all.
+		for k, v := range resp.Header {
+			c.Writer.Header().Set(k, v[0])
+		}
+		c.Writer.WriteHeader(resp.StatusCode)
+		_, err = io.Copy(c.Writer, resp.Body)
+		if err != nil {
+			return errorWrapper(err, "copy_response_body_failed", http.StatusOK)
+		}
+		err = resp.Body.Close()
+		if err != nil {
+			return errorWrapper(err, "close_response_body_failed", http.StatusOK)
+		}
+		return nil
+	}
+}

controller/relay-utils.go

@@ -77,3 +77,15 @@ func countTokenText(text string, model string) int {
 	token := tokenEncoder.Encode(text, nil, nil)
 	token := tokenEncoder.Encode(text, nil, nil)
 	return len(token)
 	return len(token)
 }
 }
+
+func errorWrapper(err error, code string, statusCode int) *OpenAIErrorWithStatusCode {
+	openAIError := OpenAIError{
+		Message: err.Error(),
+		Type:    "one_api_error",
+		Code:    code,
+	}
+	return &OpenAIErrorWithStatusCode{
+		OpenAIError: openAIError,
+		StatusCode:  statusCode,
+	}
+}

controller/relay.go

 package controller
 package controller
 
 
 import (
 import (
-	"bufio"
-	"bytes"
-	"encoding/json"
 	"fmt"
 	"fmt"
 	"github.com/gin-gonic/gin"
 	"github.com/gin-gonic/gin"
-	"io"
 	"net/http"
 	"net/http"
 	"one-api/common"
 	"one-api/common"
-	"one-api/model"
 	"strings"
 	"strings"
 )
 )
 
 
@@ -25,6 +20,7 @@ const (
 	RelayModeCompletions
 	RelayModeCompletions
 	RelayModeEmbeddings
 	RelayModeEmbeddings
 	RelayModeModeration
 	RelayModeModeration
+	RelayModeImagesGenerations
 )
 )
 
 
 // https://platform.openai.com/docs/api-reference/chat
 // https://platform.openai.com/docs/api-reference/chat
@@ -104,8 +100,16 @@ func Relay(c *gin.Context) {
 		relayMode = RelayModeEmbeddings
 		relayMode = RelayModeEmbeddings
 	} else if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
 	} else if strings.HasPrefix(c.Request.URL.Path, "/v1/moderations") {
 		relayMode = RelayModeModeration
 		relayMode = RelayModeModeration
+	} else if strings.HasPrefix(c.Request.URL.Path, "/v1/images/generations") {
+		relayMode = RelayModeImagesGenerations
+	}
+	var err *OpenAIErrorWithStatusCode
+	switch relayMode {
+	case RelayModeImagesGenerations:
+		err = relayImageHelper(c, relayMode)
+	default:
+		err = relayHelper(c, relayMode)
 	}
 	}
-	err := relayHelper(c, relayMode)
 	if err != nil {
 	if err != nil {
 		if err.StatusCode == http.StatusTooManyRequests {
 		if err.StatusCode == http.StatusTooManyRequests {
 			err.OpenAIError.Message = "当前分组负载已饱和，请稍后再试，或升级账户以提升服务质量。"
 			err.OpenAIError.Message = "当前分组负载已饱和，请稍后再试，或升级账户以提升服务质量。"
@@ -124,270 +128,6 @@ func Relay(c *gin.Context) {
 	}
 	}
 }
 }
 
 
-func errorWrapper(err error, code string, statusCode int) *OpenAIErrorWithStatusCode {
-	openAIError := OpenAIError{
-		Message: err.Error(),
-		Type:    "one_api_error",
-		Code:    code,
-	}
-	return &OpenAIErrorWithStatusCode{
-		OpenAIError: openAIError,
-		StatusCode:  statusCode,
-	}
-}
-
-func relayHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
-	channelType := c.GetInt("channel")
-	tokenId := c.GetInt("token_id")
-	consumeQuota := c.GetBool("consume_quota")
-	group := c.GetString("group")
-	var textRequest GeneralOpenAIRequest
-	if consumeQuota || channelType == common.ChannelTypeAzure || channelType == common.ChannelTypePaLM {
-		err := common.UnmarshalBodyReusable(c, &textRequest)
-		if err != nil {
-			return errorWrapper(err, "bind_request_body_failed", http.StatusBadRequest)
-		}
-	}
-	if relayMode == RelayModeModeration && textRequest.Model == "" {
-		textRequest.Model = "text-moderation-latest"
-	}
-	baseURL := common.ChannelBaseURLs[channelType]
-	requestURL := c.Request.URL.String()
-	if channelType == common.ChannelTypeCustom {
-		baseURL = c.GetString("base_url")
-	} else if channelType == common.ChannelTypeOpenAI {
-		if c.GetString("base_url") != "" {
-			baseURL = c.GetString("base_url")
-		}
-	}
-	fullRequestURL := fmt.Sprintf("%s%s", baseURL, requestURL)
-	if channelType == common.ChannelTypeAzure {
-		// https://learn.microsoft.com/en-us/azure/cognitive-services/openai/chatgpt-quickstart?pivots=rest-api&tabs=command-line#rest-api
-		query := c.Request.URL.Query()
-		apiVersion := query.Get("api-version")
-		if apiVersion == "" {
-			apiVersion = c.GetString("api_version")
-		}
-		requestURL := strings.Split(requestURL, "?")[0]
-		requestURL = fmt.Sprintf("%s?api-version=%s", requestURL, apiVersion)
-		baseURL = c.GetString("base_url")
-		task := strings.TrimPrefix(requestURL, "/v1/")
-		model_ := textRequest.Model
-		model_ = strings.Replace(model_, ".", "", -1)
-		// https://github.com/songquanpeng/one-api/issues/67
-		model_ = strings.TrimSuffix(model_, "-0301")
-		model_ = strings.TrimSuffix(model_, "-0314")
-		model_ = strings.TrimSuffix(model_, "-0613")
-		fullRequestURL = fmt.Sprintf("%s/openai/deployments/%s/%s", baseURL, model_, task)
-	} else if channelType == common.ChannelTypePaLM {
-		err := relayPaLM(textRequest, c)
-		return err
-	}
-	var promptTokens int
-	switch relayMode {
-	case RelayModeChatCompletions:
-		promptTokens = countTokenMessages(textRequest.Messages, textRequest.Model)
-	case RelayModeCompletions:
-		promptTokens = countTokenInput(textRequest.Prompt, textRequest.Model)
-	case RelayModeModeration:
-		promptTokens = countTokenInput(textRequest.Input, textRequest.Model)
-	}
-	preConsumedTokens := common.PreConsumedQuota
-	if textRequest.MaxTokens != 0 {
-		preConsumedTokens = promptTokens + textRequest.MaxTokens
-	}
-	modelRatio := common.GetModelRatio(textRequest.Model)
-	groupRatio := common.GetGroupRatio(group)
-	ratio := modelRatio * groupRatio
-	preConsumedQuota := int(float64(preConsumedTokens) * ratio)
-	if consumeQuota {
-		err := model.PreConsumeTokenQuota(tokenId, preConsumedQuota)
-		if err != nil {
-			return errorWrapper(err, "pre_consume_token_quota_failed", http.StatusOK)
-		}
-	}
-	req, err := http.NewRequest(c.Request.Method, fullRequestURL, c.Request.Body)
-	if err != nil {
-		return errorWrapper(err, "new_request_failed", http.StatusOK)
-	}
-	if channelType == common.ChannelTypeAzure {
-		key := c.Request.Header.Get("Authorization")
-		key = strings.TrimPrefix(key, "Bearer ")
-		req.Header.Set("api-key", key)
-	} else {
-		req.Header.Set("Authorization", c.Request.Header.Get("Authorization"))
-	}
-	req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
-	req.Header.Set("Accept", c.Request.Header.Get("Accept"))
-	req.Header.Set("Connection", c.Request.Header.Get("Connection"))
-	client := &http.Client{}
-	resp, err := client.Do(req)
-	if err != nil {
-		return errorWrapper(err, "do_request_failed", http.StatusOK)
-	}
-	err = req.Body.Close()
-	if err != nil {
-		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
-	}
-	err = c.Request.Body.Close()
-	if err != nil {
-		return errorWrapper(err, "close_request_body_failed", http.StatusOK)
-	}
-	var textResponse TextResponse
-	isStream := strings.HasPrefix(resp.Header.Get("Content-Type"), "text/event-stream")
-	var streamResponseText string
-
-	defer func() {
-		if consumeQuota {
-			quota := 0
-			completionRatio := 1.34 // default for gpt-3
-			if strings.HasPrefix(textRequest.Model, "gpt-4") {
-				completionRatio = 2
-			}
-			if isStream {
-				responseTokens := countTokenText(streamResponseText, textRequest.Model)
-				quota = promptTokens + int(float64(responseTokens)*completionRatio)
-			} else {
-				quota = textResponse.Usage.PromptTokens + int(float64(textResponse.Usage.CompletionTokens)*completionRatio)
-			}
-			quota = int(float64(quota) * ratio)
-			if ratio != 0 && quota <= 0 {
-				quota = 1
-			}
-			quotaDelta := quota - preConsumedQuota
-			err := model.PostConsumeTokenQuota(tokenId, quotaDelta)
-			if err != nil {
-				common.SysError("Error consuming token remain quota: " + err.Error())
-			}
-			tokenName := c.GetString("token_name")
-			userId := c.GetInt("id")
-			model.RecordLog(userId, model.LogTypeConsume, fmt.Sprintf("通过令牌「%s」使用模型 %s 消耗 %d 点额度（模型倍率 %.2f，分组倍率 %.2f）", tokenName, textRequest.Model, quota, modelRatio, groupRatio))
-			model.UpdateUserUsedQuotaAndRequestCount(userId, quota)
-			channelId := c.GetInt("channel_id")
-			model.UpdateChannelUsedQuota(channelId, quota)
-		}
-	}()
-
-	if isStream {
-		scanner := bufio.NewScanner(resp.Body)
-		scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
-			if atEOF && len(data) == 0 {
-				return 0, nil, nil
-			}
-
-			if i := strings.Index(string(data), "\n\n"); i >= 0 {
-				return i + 2, data[0:i], nil
-			}
-
-			if atEOF {
-				return len(data), data, nil
-			}
-
-			return 0, nil, nil
-		})
-		dataChan := make(chan string)
-		stopChan := make(chan bool)
-		go func() {
-			for scanner.Scan() {
-				data := scanner.Text()
-				if len(data) < 6 { // must be something wrong!
-					common.SysError("Invalid stream response: " + data)
-					continue
-				}
-				dataChan <- data
-				data = data[6:]
-				if !strings.HasPrefix(data, "[DONE]") {
-					switch relayMode {
-					case RelayModeChatCompletions:
-						var streamResponse ChatCompletionsStreamResponse
-						err = json.Unmarshal([]byte(data), &streamResponse)
-						if err != nil {
-							common.SysError("Error unmarshalling stream response: " + err.Error())
-							return
-						}
-						for _, choice := range streamResponse.Choices {
-							streamResponseText += choice.Delta.Content
-						}
-					case RelayModeCompletions:
-						var streamResponse CompletionsStreamResponse
-						err = json.Unmarshal([]byte(data), &streamResponse)
-						if err != nil {
-							common.SysError("Error unmarshalling stream response: " + err.Error())
-							return
-						}
-						for _, choice := range streamResponse.Choices {
-							streamResponseText += choice.Text
-						}
-					}
-				}
-			}
-			stopChan <- true
-		}()
-		c.Writer.Header().Set("Content-Type", "text/event-stream")
-		c.Writer.Header().Set("Cache-Control", "no-cache")
-		c.Writer.Header().Set("Connection", "keep-alive")
-		c.Writer.Header().Set("Transfer-Encoding", "chunked")
-		c.Writer.Header().Set("X-Accel-Buffering", "no")
-		c.Stream(func(w io.Writer) bool {
-			select {
-			case data := <-dataChan:
-				if strings.HasPrefix(data, "data: [DONE]") {
-					data = data[:12]
-				}
-				c.Render(-1, common.CustomEvent{Data: data})
-				return true
-			case <-stopChan:
-				return false
-			}
-		})
-		err = resp.Body.Close()
-		if err != nil {
-			return errorWrapper(err, "close_response_body_failed", http.StatusOK)
-		}
-		return nil
-	} else {
-		if consumeQuota {
-			responseBody, err := io.ReadAll(resp.Body)
-			if err != nil {
-				return errorWrapper(err, "read_response_body_failed", http.StatusOK)
-			}
-			err = resp.Body.Close()
-			if err != nil {
-				return errorWrapper(err, "close_response_body_failed", http.StatusOK)
-			}
-			err = json.Unmarshal(responseBody, &textResponse)
-			if err != nil {
-				return errorWrapper(err, "unmarshal_response_body_failed", http.StatusOK)
-			}
-			if textResponse.Error.Type != "" {
-				return &OpenAIErrorWithStatusCode{
-					OpenAIError: textResponse.Error,
-					StatusCode:  resp.StatusCode,
-				}
-			}
-			// Reset response body
-			resp.Body = io.NopCloser(bytes.NewBuffer(responseBody))
-		}
-		// We shouldn't set the header before we parse the response body, because the parse part may fail.
-		// And then we will have to send an error response, but in this case, the header has already been set.
-		// So the client will be confused by the response.
-		// For example, Postman will report error, and we cannot check the response at all.
-		for k, v := range resp.Header {
-			c.Writer.Header().Set(k, v[0])
-		}
-		c.Writer.WriteHeader(resp.StatusCode)
-		_, err = io.Copy(c.Writer, resp.Body)
-		if err != nil {
-			return errorWrapper(err, "copy_response_body_failed", http.StatusOK)
-		}
-		err = resp.Body.Close()
-		if err != nil {
-			return errorWrapper(err, "close_response_body_failed", http.StatusOK)
-		}
-		return nil
-	}
-}
-
 func RelayNotImplemented(c *gin.Context) {
 func RelayNotImplemented(c *gin.Context) {
 	err := OpenAIError{
 	err := OpenAIError{
 		Message: "API not implemented",
 		Message: "API not implemented",