sun
4450d1faf4
feat(performance): 实现HTTP连接池复用和速率限制 refactor: 优化统计数据结构为环形缓冲区 docs: 添加安全与性能修复报告和Windows部署指南 chore: 清理未使用的依赖并更新依赖版本
651 lines
16 KiB
Go
651 lines
16 KiB
Go
package main
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import (
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"runtime"
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"strings"
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"sync"
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"syscall"
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"time"
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"github.com/google/uuid"
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"github.com/gorilla/mux"
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)
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const (
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DEFAULT_PORT = "8080"
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DEFAULT_TIMEOUT = 30 * time.Second
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MAX_TEXT_LENGTH = 5000
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MIN_SPEED = 0.25
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MAX_SPEED = 4.0
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DEFAULT_SPEED = 1.0
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MAX_REQUEST_BODY_SIZE = 1024 * 1024
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RATE_LIMIT_REQUESTS = 100
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RATE_LIMIT_WINDOW = time.Minute
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MAX_RESPONSE_TIMES = 100
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MAX_ERRORS = 10
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)
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type TTSServResponse struct {
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ReqID string `json:"reqid"`
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Code int `json:"code"`
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Message string `json:"Message"`
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Operation string `json:"operation"`
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Sequence int `json:"sequence"`
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Data string `json:"data"`
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}
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type OpenAITTSRequest struct {
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Model string `json:"model"`
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Input string `json:"input"`
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Voice string `json:"voice"`
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ResponseFormat string `json:"response_format,omitempty"`
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Speed float64 `json:"speed,omitempty"`
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}
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type ByteDanceTTSConfig struct {
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AppID string
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BearerToken string
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Cluster string
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URL string
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VoiceType string
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Timeout time.Duration
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type RateLimiter struct {
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requests map[string][]time.Time
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mutex sync.Mutex
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limit int
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}
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type Stats struct {
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totalRequests int64
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successfulRequests int64
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failedRequests int64
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totalResponseTime time.Duration
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recentResponseTimes []float64
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responseTimesIndex int
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lastErrors []string
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errorsIndex int
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mutex sync.RWMutex
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}
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ar (
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VALID_API_KEYS []string
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ttsConfig ByteDanceTTSConfig
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globalHTTPClient *http.Client
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apiStats *Stats
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ateLimiter *RateLimiter
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)
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func init() {
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globalHTTPClient = &http.Client{
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Timeout: DEFAULT_TIMEOUT,
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Transport: &http.Transport{
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MaxIdleConns: 100,
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MaxIdleConnsPerHost: 10,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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},
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}
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apiStats = &Stats{
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recentResponseTimes: make([]float64, MAX_RESPONSE_TIMES),
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lastErrors: make([]string, MAX_ERRORS),
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}
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rateLimiter = &RateLimiter{
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requests: make(map[string][]time.Time),
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limit: RATE_LIMIT_REQUESTS,
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window: RATE_LIMIT_WINDOW,
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}
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func (rl *RateLimiter) Allow(key string) bool {
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rl.mutex.Lock()
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defer rl.mutex.Unlock()
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now := time.Now()
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cutoff := now.Add(-rl.window)
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timestamps := rl.requests[key]
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valid := make([]time.Time, 0, len(timestamps))
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for _, ts := range timestamps {
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if ts.After(cutoff) {
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valid = append(valid, ts)
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}
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}
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if len(valid) >= rl.limit {
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rl.requests[key] = valid
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return false
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}
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valid = append(valid, now)
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rl.requests[key] = valid
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return true
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}
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func initTTSConfig() error {
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appID := os.Getenv("BYTEDANC E_TTS_APP_ID")
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bearerToken := os.Getenv("BYTEDANCE_TTS_BEARER_TOKEN")
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cluster := os.Getenv("BYTEDANCE_TTS_CLUSTER")
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voiceType := os.Getenv("BYTEDANCE_TTS_VOICE_TYPE")
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missingVars := []string{}
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if appID == "" {
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missingVars = append(missingVars, "BYTEDANCE_TTS_APP_ID")
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}
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if bearerToken == "" {
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missingVars = append(missingVars, "BYTEDANCE_TTS_BEARER_TOKEN")
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}
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if cluster == "" {
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missingVars = append(missingVars, "BYTEDANCE_TTS_CLUSTER")
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}
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if voiceType == "" {
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missingVars = append(missingVars, "BYTEDANCE_TTS_VOICE_TYPE")
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}
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if len(missingVars) > 0 {
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return fmt.Errorf("缺少必需的环境变量: %v", missingVars)
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}
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url := os.Getenv( "BYTEDANCE_TTS_ENDPOINT")
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if url == "" {
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timeout := DEFAULT_TIMEOUT
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if timeoutStr := os.Getenv("BYTEDANCE_TTS_TIMEOUT"); timeoutStr != "" {
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if parsedTimeout, err := time.ParseDuration(timeoutStr); err == nil {
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timeout = parsedTimeout
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} else {
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log.Printf("无效的超时设置 '%s'，使用默认值: %v", timeoutStr, timeout)
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}
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}
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ttsConfig = ByteDanceTTSConfig{
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AppID: appID,
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BearerToken: bearerToken,
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Cluster: cluster,
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URL: url,
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VoiceType: voiceType,
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Timeout: timeout,
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}
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return nil
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}
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func initAPIKeys() {
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apiKey := os.Getenv("OPENAI_TTS_API_KEY")
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if apiKey != "" {
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VALID_API_KEYS = strings.Split(apiKey, ",")
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for i, k := range VALID_API_KEYS {
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VALID_API_KEYS[i] = strings.TrimSpace(k)
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}
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log.Printf("已配置 %d 个有效的API密钥", len(VALID_API_KEYS))
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} else {
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log.Println("警告: OPENAI_TTS_API_KEY 环境变量未设置，将允许所有请求")
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}
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}
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func checkEnvironmentVariables() map[string]interface{} {
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requiredVars := map[string]bool{
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"BYTEDANCE_TTS_APP_ID": os.Getenv("BYTEDANCE_TTS_APP_ID") != "",
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"BYTEDANCE_TTS_BEARER_TOKEN": os.Getenv("BYTEDANCE_TTS_BEARER_TOKEN") != "",
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"BYTEDANCE_TTS_CLUSTER": os.Getenv("BYTEDANCE_TTS_CLUSTER") != "",
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"BYTEDANCE_TTS_VOICE_TYPE": os.Getenv("BYTEDANCE_TTS_VOICE_TYPE") != "",
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}
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missingVars := []string{}
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for varName, isSet := range requiredVars {
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if !isSet {
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missingVars = append(missingVars, varName)
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}
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}
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optionalVars := map[string]bool{
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"BYTEDANCE_TTS_ENDPOINT": os.Getenv("BYTEDANCE_TTS_ENDPOINT") != "",
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"BYTEDANCE_TTS_TIMEOUT": os.Getenv("BYTEDANCE_TTS_TIMEOUT") != "",
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"OPENAI_TTS_API_KEY": os.Getenv("OPENAI_TTS_API_KEY") != "",
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"PORT": os.Getenv("PORT") != "",
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}
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return map[string]interface{}{
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"all_required_vars_set": len(missingVars) == 0,
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"missing_required_vars": missingVars,
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"required_vars_set": requiredVars,
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"optional_vars_set": optionalVars,
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}
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}
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func httpPost(url string, headers map[string]string, body []byte, timeout time.Duration) ([]byte, error) {
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req, err := http.NewRequest(http.MethodPost, url, bytes.NewBuffer(body))
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if err != nil {
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return nil, err
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}
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for key, value := range headers {
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req.Header.Set(key, value)
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}
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client := globalHTTPClient
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if timeout != 0 && timeout != ttsConfig.Timeout {
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client = &http.Client{Timeout: timeout}
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}
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resp, err := client.Do(req)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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retBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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return retBody, nil
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}
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func synthesis(text string, speed float64) ([]byte, error) {
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reqID := uuid.NewString()
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params := make(map[string]map[string]interface{})
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params["app"] = make(map[string]interface{})
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params["app"]["appid"] = ttsConfig.AppID
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params["app"]["token"] = "access_token"
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params["app"]["cluster"] = ttsConfig.Cluster
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params["user"] = make(map[string]interface{})
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params["user"]["uid"] = "uid"
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params["audio"] = make(map[string]interface{})
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params["audio"]["voice_type"] = ttsConfig.VoiceType
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params["audio"]["encoding"] = "wav"
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params["audio"]["speed_ratio"] = speed
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params["audio"]["volume_ratio"] = 1.0
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params["audio"]["pitch_ratio"] = 1.0
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params["request"] = make(map[string]interface{})
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params["request"]["reqid"] = reqID
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params["request"]["text"] = text
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params["request"]["text_type"] = "plain"
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params["request"]["operation"] = "query"
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headers := make(map[string]string)
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headers["Content-Type"] = "application/json"
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headers["Authorization"] = fmt.Sprintf("Bearer;%s", ttsConfig.BearerToken)
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bodyStr, err := json.Marshal(params)
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if err != nil {
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log.Printf("JSON marshal fail: %v", err)
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return nil, err
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}
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synResp, err := httpPost(ttsConfig.URL, headers, bodyStr, ttsConfig.Timeout)
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if err != nil {
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log.Printf("http post fail: %v", err)
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return nil, err
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}
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var respJSON TTSServResponse
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err = json.Unmarshal(synResp, &respJSON)
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if err != nil {
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log.Printf("unmarshal response fail: %v", err)
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return nil, err
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}
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if respJSON.Code != 3000 {
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log.Printf("TTS service error: code=%d, message=%s", respJSON.Code, respJSON.Message)
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return nil, fmt.Errorf("TTS service error")
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}
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audio, err := base64.StdEncoding.DecodeString(respJSON.Data)
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if err != nil {
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log.Printf("base64 decode fail: %v", err)
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return nil, err
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}
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return audio, nil
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}
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func validateAPIKey(r *http.Request) bool {
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if len(VALID_API_KEYS) == 0 {
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return true
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}
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authHeader := r.Header.Get("Authorization")
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if authHeader == "" {
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return false
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}
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if !strings.HasPrefix(authHeader, "Bearer ") {
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return false
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}
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token := strings.TrimPrefix(authHeader, "Bearer ")
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for _, validKey := range VALID_API_KEYS {
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if token == validKey {
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return true
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}
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}
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return false
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}
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func getClientIP(r *http.Request) string {
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xForwardedFor := r.Header.Get("X-Forwarded-For")
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if xForwardedFor != "" {
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ips := strings.Split(xForwardedFor, ",")
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if len(ips) > 0 {
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return strings.TrimSpace(ips[0])
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}
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}
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xRealIP := r.Header.Get("X-Real-IP")
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if xRealIP != "" {
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return xRealIP
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}
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host, _, err := net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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return r.RemoteAddr
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}
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return host
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}
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func openaiTTSHandler(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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if !validateAPIKey(r) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusUnauthorized)
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json.NewEncoder(w).Encode(map[string]interface{}{
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"error": map[string]interface{}{
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"message": "Invalid API key provided.",
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"type": "invalid_request_error",
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"code": "invalid_api_key",
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},
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})
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return
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}
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clientIP := getClientIP(r)
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if !rateLimiter.Allow(clientIP) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusTooManyRequests)
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json.NewEncoder(w).Encode(map[string]interface{}{
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"error": map[string]interface{}{
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"message": "Rate limit exceeded. Please try again later.",
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"type": "rate_limit_error",
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"code": "rate_limit_exceeded",
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},
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})
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return
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}
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body, err := io.ReadAll(http.MaxBytesReader(w, r.Body, MAX_REQUEST_BODY_SIZE))
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if err != nil {
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http.Error(w, "Request body too large", http.StatusRequestEntityTooLarge)
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return
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}
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var req OpenAITTSRequest
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if err := json.Unmarshal(body, &req); err != nil {
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http.Error(w, "Invalid JSON", http.StatusBadRequest)
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return
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}
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if req.Input == "" {
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http.Error(w, "Input text is required", http.StatusBadRequest)
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return
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}
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if len(req.Input) > MAX_TEXT_LENGTH {
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http.Error(w, fmt.Sprintf("Input text too long (max %d characters)", MAX_TEXT_LENGTH), http.StatusBadRequest)
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return
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}
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speed := req.Speed
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if speed <= 0 {
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speed = DEFAULT_SPEED
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}
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if speed < MIN_SPEED {
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speed = MIN_SPEED
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}
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if speed > MAX_SPEED {
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speed = MAX_SPEED
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}
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ttsStart := time.Now()
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audioData, err := synthesis(req.Input, speed)
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duration := time.Since(ttsStart)
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if err != nil {
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addRequestStats(false, duration, err.Error())
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http.Error(w, "TTS synthesis failed", http.StatusInternalServerError)
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return
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}
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addRequestStats(true, duration, "")
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w.Header().Set("Content-Type", "audio/wav")
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w.Header().Set("Content-Length", fmt.Sprintf("%d", len(audioData)))
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w.WriteHeader(http.StatusOK)
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w.Write(audioData)
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}
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func addRequestStats(success bool, responseTime time.Duration, errMsg string) {
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apiStats.mutex.Lock()
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defer apiStats.mutex.Unlock()
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apiStats.totalRequests++
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apiStats.totalResponseTime += responseTime
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apiStats.recentResponseTimes[apiStats.responseTimesIndex] = responseTime.Seconds() * 1000
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apiStats.responseTimesIndex = (apiStats.responseTimesIndex + 1) % MAX_RESPONSE_TIMES
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if success {
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apiStats.successfulRequests++
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} else {
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apiStats.failedRequests++
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if errMsg != "" {
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errInfo := fmt.Sprintf("%s: %s", time.Now().Format(time.RFC3339), errMsg)
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apiStats.lastErrors[apiStats.errorsIndex] = errInfo
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apiStats.errorsIndex = (apiStats.errorsIndex + 1) % MAX_ERRORS
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}
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}
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}
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func getMemoryInfo() map[string]interface{} {
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var m runtime.MemStats
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runtime.ReadMemStats(&m)
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return map[string]interface{}{
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"total_alloc": m.TotalAlloc,
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"heap_alloc": m.HeapAlloc,
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"heap_inuse": m.HeapInuse,
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"goroutines": runtime.NumGoroutine(),
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}
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}
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func healthHandler(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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apiStats.mutex.RLock()
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totalRequests := apiStats.totalRequests
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successfulRequests := apiStats.successfulRequests
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failedRequests := apiStats.failedRequests
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totalResponseTime := apiStats.totalResponseTime
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recentResponseTimes := make([]float64, 0, MAX_RESPONSE_TIMES)
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for _, t := range apiStats.recentResponseTimes {
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if t > 0 {
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recentResponseTimes = append(recentResponseTimes, t)
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}
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}
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lastErrors := make([]string, 0, MAX_ERRORS)
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for _, e := range apiStats.lastErrors {
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if e != "" {
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lastErrors = append(lastErrors, e)
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}
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}
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apiStats.mutex.RUnlock()
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var errorRate float64
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if totalRequests > 0 {
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errorRate = float64(failedRequests) / float64(totalRequests) * 100
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}
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var avgResponseTime float64
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if totalRequests > 0 {
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avgResponseTime = totalResponseTime.Seconds() * 1000 / float64(totalRequests)
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}
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envCheckStatus := checkEnvironmentVariables()
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allEnvVarsSet := envCheckStatus["all_required_vars_set"].(bool)
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status := "ok"
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if !allEnvVarsSet {
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status = "configuration_error"
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}
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response := map[string]interface{}{
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"status": status,
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"service": "ByteDance TTS to OpenAI API Adapter",
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"version": "1.1.0",
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"uptime": fmt.Sprintf("%.0f seconds", time.Since(startTime).Seconds()),
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"start_time": startTime.Format(time.RFC3339),
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"memory": getMemoryInfo(),
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"api_stats": map[string]interface{}{
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"total_requests": totalRequests,
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"successful_requests": successfulRequests,
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"failed_requests": failedRequests,
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"error_rate_percent": fmt.Sprintf("%.2f", errorRate),
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"avg_response_time_ms": fmt.Sprintf("%.2f", avgResponseTime),
|
|
"recent_response_times_ms": recentResponseTimes,
|
|
},
|
|
"errors": map[string]interface{}{
|
|
"recent_errors_count": len(lastErrors),
|
|
},
|
|
"config_status": map[string]interface{}{
|
|
"all_required_vars_set": allEnvVarsSet,
|
|
},
|
|
}
|
|
|
|
json.NewEncoder(w).Encode(response)
|
|
}
|
|
|
|
var startTime time.Time
|
|
|
|
type statusRecorder struct {
|
|
http.ResponseWriter
|
|
statusCode int
|
|
}
|
|
|
|
func (rec *statusRecorder) WriteHeader(code int) {
|
|
rec.statusCode = code
|
|
rec.ResponseWriter.WriteHeader(code)
|
|
}
|
|
|
|
func corsMiddleware(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Access-Control-Allow-Origin", "*")
|
|
w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
|
|
w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
|
|
|
|
if r.Method == http.MethodOptions {
|
|
w.WriteHeader(http.StatusOK)
|
|
return
|
|
}
|
|
|
|
next.ServeHTTP(w, r)
|
|
})
|
|
}
|
|
|
|
func main() {
|
|
startTime = time.Now()
|
|
|
|
log.SetFlags(log.LstdFlags | log.Lshortfile)
|
|
log.SetPrefix("[TTS-Server] ")
|
|
|
|
initAPIKeys()
|
|
|
|
if err := initTTSConfig(); err != nil {
|
|
log.Fatalf("配置初始化失败: %v", err)
|
|
}
|
|
|
|
router := mux.NewRouter()
|
|
|
|
router.Use(corsMiddleware)
|
|
|
|
router.Use(func(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
if r.URL.Path == "/health" {
|
|
start := time.Now()
|
|
next.ServeHTTP(w, r)
|
|
log.Printf("%s %s %s %v", r.Method, r.RequestURI, r.RemoteAddr, time.Since(start))
|
|
return
|
|
}
|
|
|
|
start := time.Now()
|
|
rec := &statusRecorder{ResponseWriter: w, statusCode: http.StatusOK}
|
|
next.ServeHTTP(rec, r)
|
|
duration := time.Since(start)
|
|
|
|
log.Printf("%s %s %s %d %v", r.Method, r.RequestURI, r.RemoteAddr, rec.statusCode, duration)
|
|
})
|
|
})
|
|
|
|
router.HandleFunc("/v1/audio/speech", openaiTTSHandler).Methods("POST", "OPTIONS")
|
|
router.HandleFunc("/health", healthHandler).Methods("GET")
|
|
router.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
http.Redirect(w, r, "/health", http.StatusFound)
|
|
}).Methods("GET")
|
|
|
|
port := os.Getenv("PORT")
|
|
if port == "" {
|
|
port = DEFAULT_PORT
|
|
}
|
|
|
|
server := &http.Server{
|
|
Addr: ":" + port,
|
|
Handler: router,
|
|
ReadTimeout: 15 * time.Second,
|
|
WriteTimeout: 15 * time.Second,
|
|
IdleTimeout: 60 * time.Second,
|
|
}
|
|
|
|
quit := make(chan os.Signal, 1)
|
|
signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
|
|
|
|
go func() {
|
|
log.Printf("Starting ByteDance TTS to OpenAI API adapter server on port %s", port)
|
|
log.Printf("OpenAI TTS endpoint: http://localhost:%s/v1/audio/speech", port)
|
|
log.Printf("Health check: http://localhost:%s/health", port)
|
|
|
|
if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
|
|
log.Fatalf("Server failed to start: %v", err)
|
|
}
|
|
}()
|
|
|
|
<-quit
|
|
log.Println("Shutting down server...")
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
defer cancel()
|
|
|
|
if err := server.Shutdown(ctx); err != nil {
|
|
log.Printf("Server forced to shutdown: %v", err)
|
|
} else {
|
|
log.Println("Server exited gracefully")
|
|
}
|
|
}
|