549 lines
14 KiB
Go
549 lines
14 KiB
Go
package main
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import (
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"bytes"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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"golang.org/x/net/http2"
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"io"
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"log"
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"net/http"
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"net/url"
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"os"
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"reflect"
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"strconv"
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"strings"
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"time"
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)
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const DefaultInstructModel = "gpt-3.5-turbo-instruct"
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const StableCodeModelPrefix = "stable-code"
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const DeepSeekCoderModel = "deepseek-coder"
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type config struct {
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Bind string `json:"bind"`
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ProxyUrl string `json:"proxy_url"`
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Timeout int `json:"timeout"`
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CodexApiBase string `json:"codex_api_base"`
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CodexApiKey string `json:"codex_api_key"`
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CodexApiOrganization string `json:"codex_api_organization"`
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CodexApiProject string `json:"codex_api_project"`
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CodexMaxTokens int `json:"codex_max_tokens"`
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CodeInstructModel string `json:"code_instruct_model"`
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ChatApiBase string `json:"chat_api_base"`
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ChatApiKey string `json:"chat_api_key"`
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ChatApiOrganization string `json:"chat_api_organization"`
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ChatApiProject string `json:"chat_api_project"`
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ChatMaxTokens int `json:"chat_max_tokens"`
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ChatModelDefault string `json:"chat_model_default"`
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ChatModelMap map[string]string `json:"chat_model_map"`
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ChatLocale string `json:"chat_locale"`
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AuthToken string `json:"auth_token"`
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}
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func readConfig() *config {
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content, err := os.ReadFile("config.json")
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if nil != err {
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log.Fatal(err)
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}
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_cfg := &config{}
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err = json.Unmarshal(content, &_cfg)
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if nil != err {
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log.Fatal(err)
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}
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v := reflect.ValueOf(_cfg).Elem()
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t := v.Type()
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for i := 0; i < v.NumField(); i++ {
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field := v.Field(i)
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tag := t.Field(i).Tag.Get("json")
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if tag == "" {
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continue
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}
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value, exists := os.LookupEnv("OVERRIDE_" + strings.ToUpper(tag))
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if !exists {
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continue
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}
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switch field.Kind() {
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case reflect.String:
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field.SetString(value)
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case reflect.Bool:
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if boolValue, err := strconv.ParseBool(value); err == nil {
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field.SetBool(boolValue)
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}
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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if intValue, err := strconv.ParseInt(value, 10, 64); err == nil {
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field.SetInt(intValue)
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}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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if uintValue, err := strconv.ParseUint(value, 10, 64); err == nil {
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field.SetUint(uintValue)
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}
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case reflect.Float32, reflect.Float64:
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if floatValue, err := strconv.ParseFloat(value, field.Type().Bits()); err == nil {
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field.SetFloat(floatValue)
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}
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}
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}
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if _cfg.CodeInstructModel == "" {
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_cfg.CodeInstructModel = DefaultInstructModel
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}
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if _cfg.CodexMaxTokens == 0 {
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_cfg.CodexMaxTokens = 500
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}
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if _cfg.ChatMaxTokens == 0 {
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_cfg.ChatMaxTokens = 4096
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}
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return _cfg
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}
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func getClient(cfg *config) (*http.Client, error) {
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transport := &http.Transport{
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ForceAttemptHTTP2: true,
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DisableKeepAlives: false,
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}
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err := http2.ConfigureTransport(transport)
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if nil != err {
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return nil, err
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}
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if "" != cfg.ProxyUrl {
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proxyUrl, err := url.Parse(cfg.ProxyUrl)
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if nil != err {
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return nil, err
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}
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transport.Proxy = http.ProxyURL(proxyUrl)
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}
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client := &http.Client{
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Transport: transport,
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Timeout: time.Duration(cfg.Timeout) * time.Second,
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}
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return client, nil
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}
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func abortCodex(c *gin.Context, status int) {
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c.Header("Content-Type", "text/event-stream")
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c.String(status, "data: [DONE]\n")
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c.Abort()
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}
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func closeIO(c io.Closer) {
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err := c.Close()
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if nil != err {
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log.Println(err)
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}
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}
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type ProxyService struct {
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cfg *config
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client *http.Client
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}
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func NewProxyService(cfg *config) (*ProxyService, error) {
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client, err := getClient(cfg)
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if nil != err {
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return nil, err
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}
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return &ProxyService{
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cfg: cfg,
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client: client,
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}, nil
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}
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func AuthMiddleware(authToken string) gin.HandlerFunc {
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return func(c *gin.Context) {
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token := c.Param("token")
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if token != authToken {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
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c.Abort()
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return
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}
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c.Next()
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}
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}
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func (s *ProxyService) InitRoutes(e *gin.Engine) {
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e.GET("/_ping", s.pong)
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e.GET("/models", s.models)
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e.GET("/v1/models", s.models)
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authToken := s.cfg.AuthToken // replace with your dynamic value as needed
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if authToken != "" {
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// 鉴权
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v1 := e.Group("/:token/v1/", AuthMiddleware(authToken))
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{
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v1.POST("/chat/completions", s.completions)
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v1.POST("/engines/copilot-codex/completions", s.codeCompletions)
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v1.POST("/v1/chat/completions", s.completions)
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v1.POST("/v1/engines/copilot-codex/completions", s.codeCompletions)
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}
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} else {
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e.POST("/v1/chat/completions", s.completions)
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e.POST("/v1/engines/copilot-codex/completions", s.codeCompletions)
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e.POST("/v1/v1/chat/completions", s.completions)
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e.POST("/v1/v1/engines/copilot-codex/completions", s.codeCompletions)
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}
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}
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type Pong struct {
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Now int `json:"now"`
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Status string `json:"status"`
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Ns1 string `json:"ns1"`
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}
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func (s *ProxyService) pong(c *gin.Context) {
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c.JSON(http.StatusOK, Pong{
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Now: time.Now().Second(),
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Status: "ok",
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Ns1: "200 OK",
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})
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}
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func (s *ProxyService) models(c *gin.Context) {
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c.JSON(http.StatusOK, gin.H{
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"data": []gin.H{
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{
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"capabilities": gin.H{
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"family": "gpt-3.5-turbo",
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"object": "model_capabilities",
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"type": "chat",
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},
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"id": "gpt-3.5-turbo",
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"name": "GPT 3.5 Turbo",
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"object": "model",
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"version": "gpt-3.5-turbo-0613",
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},
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{
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"capabilities": gin.H{
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"family": "gpt-3.5-turbo",
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"object": "model_capabilities",
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"type": "chat",
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},
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"id": "gpt-3.5-turbo-0613",
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"name": "GPT 3.5 Turbo (2023-06-13)",
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"object": "model",
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"version": "gpt-3.5-turbo-0613",
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},
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{
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"capabilities": gin.H{
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"family": "gpt-4",
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"object": "model_capabilities",
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"type": "chat",
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},
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"id": "gpt-4",
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"name": "GPT 4",
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"object": "model",
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"version": "gpt-4-0613",
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},
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{
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"capabilities": gin.H{
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"family": "gpt-4",
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"object": "model_capabilities",
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"type": "chat",
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},
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"id": "gpt-4-0613",
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"name": "GPT 4 (2023-06-13)",
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"object": "model",
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"version": "gpt-4-0613",
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},
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{
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"capabilities": gin.H{
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"family": "gpt-4-turbo",
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"object": "model_capabilities",
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"type": "chat",
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},
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"id": "gpt-4-0125-preview",
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"name": "GPT 4 Turbo (2024-01-25 Preview)",
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"object": "model",
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"version": "gpt-4-0125-preview",
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},
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{
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"capabilities": gin.H{
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"family": "text-embedding-ada-002",
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"object": "model_capabilities",
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"type": "embeddings",
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},
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"id": "text-embedding-ada-002",
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"name": "Embedding V2 Ada",
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"object": "model",
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"version": "text-embedding-ada-002",
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},
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{
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"capabilities": gin.H{
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"family": "text-embedding-ada-002",
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"object": "model_capabilities",
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"type": "embeddings",
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},
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"id": "text-embedding-ada-002-index",
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"name": "Embedding V2 Ada (Index)",
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"object": "model",
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"version": "text-embedding-ada-002",
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},
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{
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"capabilities": gin.H{
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"family": "text-embedding-3-small",
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"object": "model_capabilities",
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"type": "embeddings",
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},
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"id": "text-embedding-3-small",
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"name": "Embedding V3 small",
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"object": "model",
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"version": "text-embedding-3-small",
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},
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{
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"capabilities": gin.H{
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"family": "text-embedding-3-small",
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"object": "model_capabilities",
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"type": "embeddings",
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},
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"id": "text-embedding-3-small-inference",
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"name": "Embedding V3 small (Inference)",
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"object": "model",
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"version": "text-embedding-3-small",
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},
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},
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"object": "list",
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})
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}
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func (s *ProxyService) completions(c *gin.Context) {
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ctx := c.Request.Context()
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body, err := io.ReadAll(c.Request.Body)
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if nil != err {
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c.AbortWithStatus(http.StatusBadRequest)
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return
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}
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model := gjson.GetBytes(body, "model").String()
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if mapped, ok := s.cfg.ChatModelMap[model]; ok {
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model = mapped
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} else {
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model = s.cfg.ChatModelDefault
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}
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body, _ = sjson.SetBytes(body, "model", model)
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if !gjson.GetBytes(body, "function_call").Exists() {
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messages := gjson.GetBytes(body, "messages").Array()
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lastIndex := len(messages) - 1
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if !strings.Contains(messages[lastIndex].Get("content").String(), "Respond in the following locale") {
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locale := s.cfg.ChatLocale
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if locale == "" {
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locale = "zh_CN"
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}
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body, _ = sjson.SetBytes(body, "messages."+strconv.Itoa(lastIndex)+".content", messages[lastIndex].Get("content").String()+"Respond in the following locale: "+locale+".")
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}
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}
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body, _ = sjson.DeleteBytes(body, "intent")
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body, _ = sjson.DeleteBytes(body, "intent_threshold")
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body, _ = sjson.DeleteBytes(body, "intent_content")
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if int(gjson.GetBytes(body, "max_tokens").Int()) > s.cfg.ChatMaxTokens {
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body, _ = sjson.SetBytes(body, "max_tokens", s.cfg.ChatMaxTokens)
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}
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proxyUrl := s.cfg.ChatApiBase + "/chat/completions"
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, proxyUrl, io.NopCloser(bytes.NewBuffer(body)))
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if nil != err {
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c.AbortWithStatus(http.StatusInternalServerError)
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return
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", "Bearer "+s.cfg.ChatApiKey)
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if "" != s.cfg.ChatApiOrganization {
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req.Header.Set("OpenAI-Organization", s.cfg.ChatApiOrganization)
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}
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if "" != s.cfg.ChatApiProject {
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req.Header.Set("OpenAI-Project", s.cfg.ChatApiProject)
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}
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resp, err := s.client.Do(req)
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if nil != err {
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if errors.Is(err, context.Canceled) {
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c.AbortWithStatus(http.StatusRequestTimeout)
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return
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}
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log.Println("request conversation failed:", err.Error())
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c.AbortWithStatus(http.StatusInternalServerError)
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return
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}
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defer closeIO(resp.Body)
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if resp.StatusCode != http.StatusOK { // log
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body, _ := io.ReadAll(resp.Body)
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log.Println("request completions failed:", string(body))
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resp.Body = io.NopCloser(bytes.NewBuffer(body))
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}
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c.Status(resp.StatusCode)
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contentType := resp.Header.Get("Content-Type")
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if "" != contentType {
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c.Header("Content-Type", contentType)
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}
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_, _ = io.Copy(c.Writer, resp.Body)
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}
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func (s *ProxyService) codeCompletions(c *gin.Context) {
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ctx := c.Request.Context()
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time.Sleep(200 * time.Millisecond)
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if ctx.Err() != nil {
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abortCodex(c, http.StatusRequestTimeout)
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return
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}
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body, err := io.ReadAll(c.Request.Body)
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if nil != err {
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abortCodex(c, http.StatusBadRequest)
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return
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}
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body = ConstructRequestBody(body, s.cfg)
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proxyUrl := s.cfg.CodexApiBase + "/completions"
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, proxyUrl, io.NopCloser(bytes.NewBuffer(body)))
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if nil != err {
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abortCodex(c, http.StatusInternalServerError)
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return
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", "Bearer "+s.cfg.CodexApiKey)
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if "" != s.cfg.CodexApiOrganization {
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req.Header.Set("OpenAI-Organization", s.cfg.CodexApiOrganization)
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}
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if "" != s.cfg.CodexApiProject {
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req.Header.Set("OpenAI-Project", s.cfg.CodexApiProject)
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}
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resp, err := s.client.Do(req)
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if nil != err {
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if errors.Is(err, context.Canceled) {
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abortCodex(c, http.StatusRequestTimeout)
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return
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}
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log.Println("request completions failed:", err.Error())
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abortCodex(c, http.StatusInternalServerError)
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return
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}
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defer closeIO(resp.Body)
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if resp.StatusCode != http.StatusOK {
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body, _ := io.ReadAll(resp.Body)
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log.Println("request completions failed:", string(body))
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abortCodex(c, resp.StatusCode)
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return
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}
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c.Status(resp.StatusCode)
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contentType := resp.Header.Get("Content-Type")
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if "" != contentType {
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c.Header("Content-Type", contentType)
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}
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_, _ = io.Copy(c.Writer, resp.Body)
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}
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func ConstructRequestBody(body []byte, cfg *config) []byte {
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body, _ = sjson.DeleteBytes(body, "extra")
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body, _ = sjson.DeleteBytes(body, "nwo")
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body, _ = sjson.SetBytes(body, "model", cfg.CodeInstructModel)
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if int(gjson.GetBytes(body, "max_tokens").Int()) > cfg.CodexMaxTokens {
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body, _ = sjson.SetBytes(body, "max_tokens", cfg.CodexMaxTokens)
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}
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if strings.Contains(cfg.CodeInstructModel, StableCodeModelPrefix) {
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return constructWithStableCodeModel(body)
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} else if strings.HasPrefix(cfg.CodeInstructModel, DeepSeekCoderModel) {
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if gjson.GetBytes(body, "n").Int() > 1 {
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body, _ = sjson.SetBytes(body, "n", 1)
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}
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}
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if strings.HasSuffix(cfg.ChatApiBase, "chat") {
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// @Todo constructWithChatModel
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// 如果code base以chat结尾则构建chatModel，暂时没有好的prompt
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}
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return body
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}
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func constructWithStableCodeModel(body []byte) []byte {
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suffix := gjson.GetBytes(body, "suffix")
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prompt := gjson.GetBytes(body, "prompt")
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content := fmt.Sprintf("<fim_prefix>%s<fim_suffix>%s<fim_middle>", prompt, suffix)
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// 创建新的 JSON 对象并添加到 body 中
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messages := []map[string]string{
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{
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"role": "user",
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"content": content,
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},
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}
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return constructWithChatModel(body, messages)
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}
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func constructWithChatModel(body []byte, messages interface{}) []byte {
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body, _ = sjson.SetBytes(body, "messages", messages)
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// fmt.Printf("Request Body: %s\n", body)
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// 2. 将转义的字符替换回原来的字符
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jsonStr := string(body)
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jsonStr = strings.ReplaceAll(jsonStr, "\\u003c", "<")
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jsonStr = strings.ReplaceAll(jsonStr, "\\u003e", ">")
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return []byte(jsonStr)
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}
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|
||
func main() {
|
||
cfg := readConfig()
|
||
|
||
gin.SetMode(gin.ReleaseMode)
|
||
r := gin.Default()
|
||
|
||
proxyService, err := NewProxyService(cfg)
|
||
if nil != err {
|
||
log.Fatal(err)
|
||
return
|
||
}
|
||
|
||
proxyService.InitRoutes(r)
|
||
|
||
err = r.Run(cfg.Bind)
|
||
if nil != err {
|
||
log.Fatal(err)
|
||
return
|
||
}
|
||
|
||
}
|