ai-gateway/controller/relay-tencent.go

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package controller
import (
"bufio"
"crypto/hmac"
"crypto/sha1"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"github.com/gin-gonic/gin"
"io"
"net/http"
"one-api/common"
"sort"
"strconv"
"strings"
)
// https://cloud.tencent.com/document/product/1729/97732
type TencentMessage struct {
Role string `json:"role"`
Content string `json:"content"`
}
type TencentChatRequest struct {
AppId int64 `json:"app_id"` // 腾讯云账号的 APPID
SecretId string `json:"secret_id"` // 官网 SecretId
// Timestamp当前 UNIX 时间戳,单位为秒,可记录发起 API 请求的时间。
// 例如1529223702如果与当前时间相差过大会引起签名过期错误
Timestamp int64 `json:"timestamp"`
// Expired 签名的有效期,是一个符合 UNIX Epoch 时间戳规范的数值,
// 单位为秒Expired 必须大于 Timestamp 且 Expired-Timestamp 小于90天
Expired int64 `json:"expired"`
QueryID string `json:"query_id"` //请求 Id用于问题排查
// Temperature 较高的数值会使输出更加随机,而较低的数值会使其更加集中和确定
// 默认 1.0,取值区间为[0.0,2.0],非必要不建议使用,不合理的取值会影响效果
// 建议该参数和 top_p 只设置1个不要同时更改 top_p
Temperature float64 `json:"temperature"`
// TopP 影响输出文本的多样性,取值越大,生成文本的多样性越强
// 默认1.0,取值区间为[0.0, 1.0],非必要不建议使用, 不合理的取值会影响效果
// 建议该参数和 temperature 只设置1个不要同时更改
TopP float64 `json:"top_p"`
// Stream 0同步1流式 默认协议SSE)
// 同步请求超时60s如果内容较长建议使用流式
Stream int `json:"stream"`
// Messages 会话内容, 长度最多为40, 按对话时间从旧到新在数组中排列
// 输入 content 总数最大支持 3000 token。
Messages []TencentMessage `json:"messages"`
}
type TencentError struct {
Code int `json:"code"`
Message string `json:"message"`
}
type TencentUsage struct {
InputTokens int `json:"input_tokens"`
OutputTokens int `json:"output_tokens"`
TotalTokens int `json:"total_tokens"`
}
type TencentResponseChoices struct {
FinishReason string `json:"finish_reason,omitempty"` // 流式结束标志位,为 stop 则表示尾包
Messages TencentMessage `json:"messages,omitempty"` // 内容,同步模式返回内容,流模式为 null 输出 content 内容总数最多支持 1024token。
Delta TencentMessage `json:"delta,omitempty"` // 内容,流模式返回内容,同步模式为 null 输出 content 内容总数最多支持 1024token。
}
type TencentChatResponse struct {
Choices []TencentResponseChoices `json:"choices,omitempty"` // 结果
Created string `json:"created,omitempty"` // unix 时间戳的字符串
Id string `json:"id,omitempty"` // 会话 id
Usage Usage `json:"usage,omitempty"` // token 数量
Error TencentError `json:"error,omitempty"` // 错误信息 注意:此字段可能返回 null表示取不到有效值
Note string `json:"note,omitempty"` // 注释
ReqID string `json:"req_id,omitempty"` // 唯一请求 Id每次请求都会返回。用于反馈接口入参
}
func requestOpenAI2Tencent(request GeneralOpenAIRequest) *TencentChatRequest {
messages := make([]TencentMessage, 0, len(request.Messages))
for i := 0; i < len(request.Messages); i++ {
message := request.Messages[i]
if message.Role == "system" {
messages = append(messages, TencentMessage{
Role: "user",
Content: message.StringContent(),
})
messages = append(messages, TencentMessage{
Role: "assistant",
Content: "Okay",
})
continue
}
messages = append(messages, TencentMessage{
Content: message.StringContent(),
Role: message.Role,
})
}
stream := 0
if request.Stream {
stream = 1
}
return &TencentChatRequest{
Timestamp: common.GetTimestamp(),
Expired: common.GetTimestamp() + 24*60*60,
QueryID: common.GetUUID(),
Temperature: request.Temperature,
TopP: request.TopP,
Stream: stream,
Messages: messages,
}
}
func responseTencent2OpenAI(response *TencentChatResponse) *OpenAITextResponse {
fullTextResponse := OpenAITextResponse{
Object: "chat.completion",
Created: common.GetTimestamp(),
Usage: response.Usage,
}
if len(response.Choices) > 0 {
choice := OpenAITextResponseChoice{
Index: 0,
Message: Message{
Role: "assistant",
Content: response.Choices[0].Messages.Content,
},
FinishReason: response.Choices[0].FinishReason,
}
fullTextResponse.Choices = append(fullTextResponse.Choices, choice)
}
return &fullTextResponse
}
func streamResponseTencent2OpenAI(TencentResponse *TencentChatResponse) *ChatCompletionsStreamResponse {
response := ChatCompletionsStreamResponse{
Object: "chat.completion.chunk",
Created: common.GetTimestamp(),
Model: "tencent-hunyuan",
}
if len(TencentResponse.Choices) > 0 {
var choice ChatCompletionsStreamResponseChoice
choice.Delta.Content = TencentResponse.Choices[0].Delta.Content
if TencentResponse.Choices[0].FinishReason == "stop" {
choice.FinishReason = &stopFinishReason
}
response.Choices = append(response.Choices, choice)
}
return &response
}
func tencentStreamHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStatusCode, string) {
var responseText string
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"); i >= 0 {
return i + 1, 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) < 5 { // ignore blank line or wrong format
continue
}
if data[:5] != "data:" {
continue
}
data = data[5:]
dataChan <- data
}
stopChan <- true
}()
setEventStreamHeaders(c)
c.Stream(func(w io.Writer) bool {
select {
case data := <-dataChan:
var TencentResponse TencentChatResponse
err := json.Unmarshal([]byte(data), &TencentResponse)
if err != nil {
common.SysError("error unmarshalling stream response: " + err.Error())
return true
}
response := streamResponseTencent2OpenAI(&TencentResponse)
if len(response.Choices) != 0 {
responseText += response.Choices[0].Delta.Content
}
jsonResponse, err := json.Marshal(response)
if err != nil {
common.SysError("error marshalling stream response: " + err.Error())
return true
}
c.Render(-1, common.CustomEvent{Data: "data: " + string(jsonResponse)})
return true
case <-stopChan:
c.Render(-1, common.CustomEvent{Data: "data: [DONE]"})
return false
}
})
err := resp.Body.Close()
if err != nil {
return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), ""
}
return nil, responseText
}
func tencentHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStatusCode, *Usage) {
var TencentResponse TencentChatResponse
responseBody, err := io.ReadAll(resp.Body)
if err != nil {
return errorWrapper(err, "read_response_body_failed", http.StatusInternalServerError), nil
}
err = resp.Body.Close()
if err != nil {
return errorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), nil
}
err = json.Unmarshal(responseBody, &TencentResponse)
if err != nil {
return errorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError), nil
}
if TencentResponse.Error.Code != 0 {
return &OpenAIErrorWithStatusCode{
OpenAIError: OpenAIError{
Message: TencentResponse.Error.Message,
Code: TencentResponse.Error.Code,
},
StatusCode: resp.StatusCode,
}, nil
}
fullTextResponse := responseTencent2OpenAI(&TencentResponse)
fullTextResponse.Model = "hunyuan"
jsonResponse, err := json.Marshal(fullTextResponse)
if err != nil {
return errorWrapper(err, "marshal_response_body_failed", http.StatusInternalServerError), nil
}
c.Writer.Header().Set("Content-Type", "application/json")
c.Writer.WriteHeader(resp.StatusCode)
_, err = c.Writer.Write(jsonResponse)
return nil, &fullTextResponse.Usage
}
func parseTencentConfig(config string) (appId int64, secretId string, secretKey string, err error) {
parts := strings.Split(config, "|")
if len(parts) != 3 {
err = errors.New("invalid tencent config")
return
}
appId, err = strconv.ParseInt(parts[0], 10, 64)
secretId = parts[1]
secretKey = parts[2]
return
}
func getTencentSign(req TencentChatRequest, secretKey string) string {
params := make([]string, 0)
params = append(params, "app_id="+strconv.FormatInt(req.AppId, 10))
params = append(params, "secret_id="+req.SecretId)
params = append(params, "timestamp="+strconv.FormatInt(req.Timestamp, 10))
params = append(params, "query_id="+req.QueryID)
params = append(params, "temperature="+strconv.FormatFloat(req.Temperature, 'f', -1, 64))
params = append(params, "top_p="+strconv.FormatFloat(req.TopP, 'f', -1, 64))
params = append(params, "stream="+strconv.Itoa(req.Stream))
params = append(params, "expired="+strconv.FormatInt(req.Expired, 10))
var messageStr string
for _, msg := range req.Messages {
messageStr += fmt.Sprintf(`{"role":"%s","content":"%s"},`, msg.Role, msg.Content)
}
messageStr = strings.TrimSuffix(messageStr, ",")
params = append(params, "messages=["+messageStr+"]")
sort.Sort(sort.StringSlice(params))
url := "hunyuan.cloud.tencent.com/hyllm/v1/chat/completions?" + strings.Join(params, "&")
mac := hmac.New(sha1.New, []byte(secretKey))
signURL := url
mac.Write([]byte(signURL))
sign := mac.Sum([]byte(nil))
return base64.StdEncoding.EncodeToString(sign)
}