mirror of
https://github.com/songquanpeng/one-api.git
synced 2025-10-18 17:51:28 +00:00
refactor: refactor relay part (#935)
This commit is contained in:
JustSong
258
relay/channel/xunfei/main.go
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258
relay/channel/xunfei/main.go
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@@ -0,0 +1,258 @@
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package xunfei
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/gorilla/websocket"
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"io"
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"net/http"
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"net/url"
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"one-api/common"
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"one-api/relay/channel/openai"
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"one-api/relay/constant"
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"strings"
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"time"
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)
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// https://console.xfyun.cn/services/cbm
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// https://www.xfyun.cn/doc/spark/Web.html
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func requestOpenAI2Xunfei(request openai.GeneralOpenAIRequest, xunfeiAppId string, domain string) *ChatRequest {
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messages := make([]Message, 0, len(request.Messages))
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for _, message := range request.Messages {
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if message.Role == "system" {
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messages = append(messages, Message{
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Role: "user",
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Content: message.StringContent(),
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})
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messages = append(messages, Message{
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Role: "assistant",
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Content: "Okay",
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})
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} else {
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messages = append(messages, Message{
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Role: message.Role,
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Content: message.StringContent(),
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})
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}
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}
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xunfeiRequest := ChatRequest{}
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xunfeiRequest.Header.AppId = xunfeiAppId
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xunfeiRequest.Parameter.Chat.Domain = domain
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xunfeiRequest.Parameter.Chat.Temperature = request.Temperature
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xunfeiRequest.Parameter.Chat.TopK = request.N
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xunfeiRequest.Parameter.Chat.MaxTokens = request.MaxTokens
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xunfeiRequest.Payload.Message.Text = messages
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return &xunfeiRequest
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}
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func responseXunfei2OpenAI(response *ChatResponse) *openai.TextResponse {
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if len(response.Payload.Choices.Text) == 0 {
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response.Payload.Choices.Text = []ChatResponseTextItem{
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{
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Content: "",
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},
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}
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}
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choice := openai.TextResponseChoice{
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Index: 0,
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Message: openai.Message{
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Role: "assistant",
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Content: response.Payload.Choices.Text[0].Content,
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},
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FinishReason: constant.StopFinishReason,
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}
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fullTextResponse := openai.TextResponse{
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Object: "chat.completion",
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Created: common.GetTimestamp(),
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Choices: []openai.TextResponseChoice{choice},
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Usage: response.Payload.Usage.Text,
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}
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return &fullTextResponse
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}
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func streamResponseXunfei2OpenAI(xunfeiResponse *ChatResponse) *openai.ChatCompletionsStreamResponse {
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if len(xunfeiResponse.Payload.Choices.Text) == 0 {
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xunfeiResponse.Payload.Choices.Text = []ChatResponseTextItem{
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{
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Content: "",
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},
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}
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}
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var choice openai.ChatCompletionsStreamResponseChoice
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choice.Delta.Content = xunfeiResponse.Payload.Choices.Text[0].Content
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if xunfeiResponse.Payload.Choices.Status == 2 {
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choice.FinishReason = &constant.StopFinishReason
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}
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response := openai.ChatCompletionsStreamResponse{
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Object: "chat.completion.chunk",
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Created: common.GetTimestamp(),
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Model: "SparkDesk",
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Choices: []openai.ChatCompletionsStreamResponseChoice{choice},
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}
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return &response
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}
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func buildXunfeiAuthUrl(hostUrl string, apiKey, apiSecret string) string {
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HmacWithShaToBase64 := func(algorithm, data, key string) string {
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mac := hmac.New(sha256.New, []byte(key))
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mac.Write([]byte(data))
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encodeData := mac.Sum(nil)
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return base64.StdEncoding.EncodeToString(encodeData)
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}
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ul, err := url.Parse(hostUrl)
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if err != nil {
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fmt.Println(err)
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}
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date := time.Now().UTC().Format(time.RFC1123)
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signString := []string{"host: " + ul.Host, "date: " + date, "GET " + ul.Path + " HTTP/1.1"}
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sign := strings.Join(signString, "\n")
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sha := HmacWithShaToBase64("hmac-sha256", sign, apiSecret)
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authUrl := fmt.Sprintf("hmac username=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"", apiKey,
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"hmac-sha256", "host date request-line", sha)
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authorization := base64.StdEncoding.EncodeToString([]byte(authUrl))
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v := url.Values{}
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v.Add("host", ul.Host)
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v.Add("date", date)
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v.Add("authorization", authorization)
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callUrl := hostUrl + "?" + v.Encode()
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return callUrl
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}
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func StreamHandler(c *gin.Context, textRequest openai.GeneralOpenAIRequest, appId string, apiSecret string, apiKey string) (*openai.ErrorWithStatusCode, *openai.Usage) {
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domain, authUrl := getXunfeiAuthUrl(c, apiKey, apiSecret)
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dataChan, stopChan, err := xunfeiMakeRequest(textRequest, domain, authUrl, appId)
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if err != nil {
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return openai.ErrorWrapper(err, "make xunfei request err", http.StatusInternalServerError), nil
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}
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common.SetEventStreamHeaders(c)
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var usage openai.Usage
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c.Stream(func(w io.Writer) bool {
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select {
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case xunfeiResponse := <-dataChan:
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usage.PromptTokens += xunfeiResponse.Payload.Usage.Text.PromptTokens
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usage.CompletionTokens += xunfeiResponse.Payload.Usage.Text.CompletionTokens
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usage.TotalTokens += xunfeiResponse.Payload.Usage.Text.TotalTokens
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response := streamResponseXunfei2OpenAI(&xunfeiResponse)
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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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return nil, &usage
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}
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func Handler(c *gin.Context, textRequest openai.GeneralOpenAIRequest, appId string, apiSecret string, apiKey string) (*openai.ErrorWithStatusCode, *openai.Usage) {
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domain, authUrl := getXunfeiAuthUrl(c, apiKey, apiSecret)
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dataChan, stopChan, err := xunfeiMakeRequest(textRequest, domain, authUrl, appId)
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if err != nil {
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return openai.ErrorWrapper(err, "make xunfei request err", http.StatusInternalServerError), nil
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}
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var usage openai.Usage
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var content string
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var xunfeiResponse ChatResponse
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stop := false
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for !stop {
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select {
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case xunfeiResponse = <-dataChan:
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if len(xunfeiResponse.Payload.Choices.Text) == 0 {
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continue
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}
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content += xunfeiResponse.Payload.Choices.Text[0].Content
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usage.PromptTokens += xunfeiResponse.Payload.Usage.Text.PromptTokens
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usage.CompletionTokens += xunfeiResponse.Payload.Usage.Text.CompletionTokens
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usage.TotalTokens += xunfeiResponse.Payload.Usage.Text.TotalTokens
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case stop = <-stopChan:
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}
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}
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if len(xunfeiResponse.Payload.Choices.Text) == 0 {
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xunfeiResponse.Payload.Choices.Text = []ChatResponseTextItem{
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{
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Content: "",
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},
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}
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}
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xunfeiResponse.Payload.Choices.Text[0].Content = content
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response := responseXunfei2OpenAI(&xunfeiResponse)
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jsonResponse, err := json.Marshal(response)
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if err != nil {
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return openai.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.Write(jsonResponse)
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return nil, &usage
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}
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func xunfeiMakeRequest(textRequest openai.GeneralOpenAIRequest, domain, authUrl, appId string) (chan ChatResponse, chan bool, error) {
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d := websocket.Dialer{
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HandshakeTimeout: 5 * time.Second,
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}
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conn, resp, err := d.Dial(authUrl, nil)
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if err != nil || resp.StatusCode != 101 {
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return nil, nil, err
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}
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data := requestOpenAI2Xunfei(textRequest, appId, domain)
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err = conn.WriteJSON(data)
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if err != nil {
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return nil, nil, err
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}
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dataChan := make(chan ChatResponse)
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stopChan := make(chan bool)
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go func() {
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for {
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_, msg, err := conn.ReadMessage()
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if err != nil {
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common.SysError("error reading stream response: " + err.Error())
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break
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}
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var response ChatResponse
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err = json.Unmarshal(msg, &response)
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if err != nil {
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common.SysError("error unmarshalling stream response: " + err.Error())
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break
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}
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dataChan <- response
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if response.Payload.Choices.Status == 2 {
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err := conn.Close()
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if err != nil {
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common.SysError("error closing websocket connection: " + err.Error())
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}
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break
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}
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}
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stopChan <- true
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}()
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return dataChan, stopChan, nil
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}
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func getXunfeiAuthUrl(c *gin.Context, apiKey string, apiSecret string) (string, string) {
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query := c.Request.URL.Query()
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apiVersion := query.Get("api-version")
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if apiVersion == "" {
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apiVersion = c.GetString("api_version")
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}
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if apiVersion == "" {
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apiVersion = "v1.1"
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common.SysLog("api_version not found, use default: " + apiVersion)
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}
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domain := "general"
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if apiVersion != "v1.1" {
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domain += strings.Split(apiVersion, ".")[0]
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}
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authUrl := buildXunfeiAuthUrl(fmt.Sprintf("wss://spark-api.xf-yun.com/%s/chat", apiVersion), apiKey, apiSecret)
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return domain, authUrl
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}
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