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@@ -0,0 +1,203 @@
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+package controller
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+
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+import (
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+ "bufio"
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+ "encoding/json"
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+ "github.com/gin-gonic/gin"
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+ "io"
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+ "net/http"
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+ "one-api/common"
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+ "strings"
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+)
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+
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+// https://cloud.baidu.com/doc/WENXINWORKSHOP/s/flfmc9do2
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+
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+type BaiduTokenResponse struct {
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+ RefreshToken string `json:"refresh_token"`
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+ ExpiresIn int `json:"expires_in"`
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+ SessionKey string `json:"session_key"`
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+ AccessToken string `json:"access_token"`
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+ Scope string `json:"scope"`
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+ SessionSecret string `json:"session_secret"`
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+}
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+
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+type BaiduMessage struct {
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+ Role string `json:"role"`
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+ Content string `json:"content"`
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+}
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+
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+type BaiduChatRequest struct {
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+ Messages []BaiduMessage `json:"messages"`
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+ Stream bool `json:"stream"`
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+ UserId string `json:"user_id,omitempty"`
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+}
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+
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+type BaiduError struct {
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+ ErrorCode int `json:"error_code"`
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+ ErrorMsg string `json:"error_msg"`
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+}
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+
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+type BaiduChatResponse struct {
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+ Id string `json:"id"`
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+ Object string `json:"object"`
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+ Created int64 `json:"created"`
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+ Result string `json:"result"`
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+ IsTruncated bool `json:"is_truncated"`
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+ NeedClearHistory bool `json:"need_clear_history"`
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+ Usage Usage `json:"usage"`
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+ BaiduError
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+}
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+
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+type BaiduChatStreamResponse struct {
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+ BaiduChatResponse
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+ SentenceId int `json:"sentence_id"`
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+ IsEnd bool `json:"is_end"`
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+}
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+
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+func requestOpenAI2Baidu(request GeneralOpenAIRequest) *BaiduChatRequest {
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+ messages := make([]BaiduMessage, 0, len(request.Messages))
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+ for _, message := range request.Messages {
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+ messages = append(messages, BaiduMessage{
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+ Role: message.Role,
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+ Content: message.Content,
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+ })
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+ }
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+ return &BaiduChatRequest{
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+ Messages: messages,
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+ Stream: request.Stream,
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+ }
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+}
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+
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+func responseBaidu2OpenAI(response *BaiduChatResponse) *OpenAITextResponse {
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+ choice := OpenAITextResponseChoice{
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+ Index: 0,
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+ Message: Message{
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+ Role: "assistant",
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+ Content: response.Result,
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+ },
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+ FinishReason: "stop",
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+ }
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+ fullTextResponse := OpenAITextResponse{
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+ Id: response.Id,
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+ Object: "chat.completion",
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+ Created: response.Created,
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+ Choices: []OpenAITextResponseChoice{choice},
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+ Usage: response.Usage,
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+ }
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+ return &fullTextResponse
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+}
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+
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+func streamResponseBaidu2OpenAI(baiduResponse *BaiduChatStreamResponse) *ChatCompletionsStreamResponse {
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+ var choice ChatCompletionsStreamResponseChoice
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+ choice.Delta.Content = baiduResponse.Result
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+ choice.FinishReason = "stop"
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+ response := ChatCompletionsStreamResponse{
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+ Id: baiduResponse.Id,
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+ Object: "chat.completion.chunk",
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+ Created: baiduResponse.Created,
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+ Model: "ernie-bot",
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+ Choices: []ChatCompletionsStreamResponseChoice{choice},
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+ }
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+ return &response
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+}
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+
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+func baiduStreamHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStatusCode, *Usage) {
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+ var usage Usage
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+ scanner := bufio.NewScanner(resp.Body)
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+ scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
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+ if atEOF && len(data) == 0 {
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+ return 0, nil, nil
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+ }
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+ if i := strings.Index(string(data), "\n"); i >= 0 {
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+ return i + 1, data[0:i], nil
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+ }
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+ if atEOF {
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+ return len(data), data, nil
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+ }
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+ return 0, nil, nil
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+ })
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+ dataChan := make(chan string)
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+ stopChan := make(chan bool)
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+ go func() {
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+ for scanner.Scan() {
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+ data := scanner.Text()
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+ if len(data) < 6 { // ignore blank line or wrong format
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+ continue
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+ }
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+ data = data[6:]
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+ dataChan <- data
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+ }
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+ stopChan <- true
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+ }()
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+ c.Writer.Header().Set("Content-Type", "text/event-stream")
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+ c.Writer.Header().Set("Cache-Control", "no-cache")
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+ c.Writer.Header().Set("Connection", "keep-alive")
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+ c.Writer.Header().Set("Transfer-Encoding", "chunked")
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+ c.Writer.Header().Set("X-Accel-Buffering", "no")
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+ c.Stream(func(w io.Writer) bool {
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+ select {
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+ case data := <-dataChan:
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+ var baiduResponse BaiduChatStreamResponse
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+ err := json.Unmarshal([]byte(data), &baiduResponse)
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+ if err != nil {
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+ common.SysError("error unmarshalling stream response: " + err.Error())
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+ return true
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+ }
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+ usage.PromptTokens += baiduResponse.Usage.PromptTokens
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+ usage.CompletionTokens += baiduResponse.Usage.CompletionTokens
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+ usage.TotalTokens += baiduResponse.Usage.TotalTokens
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+ response := streamResponseBaidu2OpenAI(&baiduResponse)
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+ jsonResponse, err := json.Marshal(response)
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+ if err != nil {
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+ common.SysError("error marshalling stream response: " + err.Error())
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+ return true
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+ }
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+ c.Render(-1, common.CustomEvent{Data: "data: " + string(jsonResponse)})
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+ return true
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+ case <-stopChan:
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+ c.Render(-1, common.CustomEvent{Data: "data: [DONE]"})
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+ return false
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+ }
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+ })
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+ err := resp.Body.Close()
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+ if err != nil {
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+ return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), nil
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+ }
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+ return nil, &usage
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+}
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+
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+func baiduHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStatusCode, *Usage) {
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+ var baiduResponse BaiduChatResponse
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+ responseBody, err := io.ReadAll(resp.Body)
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+ if err != nil {
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+ return errorWrapper(err, "read_response_body_failed", http.StatusInternalServerError), nil
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+ }
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+ err = resp.Body.Close()
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+ if err != nil {
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+ return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), nil
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+ }
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+ err = json.Unmarshal(responseBody, &baiduResponse)
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+ if err != nil {
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+ return errorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError), nil
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+ }
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+ if baiduResponse.ErrorMsg != "" {
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+ return &OpenAIErrorWithStatusCode{
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+ OpenAIError: OpenAIError{
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+ Message: baiduResponse.ErrorMsg,
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+ Type: "baidu_error",
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+ Param: "",
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+ Code: baiduResponse.ErrorCode,
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+ },
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+ StatusCode: resp.StatusCode,
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+ }, nil
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+ }
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+ fullTextResponse := responseBaidu2OpenAI(&baiduResponse)
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+ jsonResponse, err := json.Marshal(fullTextResponse)
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+ if err != nil {
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+ return errorWrapper(err, "marshal_response_body_failed", http.StatusInternalServerError), nil
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+ }
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+ c.Writer.Header().Set("Content-Type", "application/json")
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+ c.Writer.WriteHeader(resp.StatusCode)
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+ _, err = c.Writer.Write(jsonResponse)
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+ return nil, &fullTextResponse.Usage
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+}
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