新增快手平台和对应的接口

service/sync/api_client.go

@@ -3,13 +3,16 @@ package sync
 import (
 	"bytes"
 	"context"
+	"crypto/md5"
 	"crypto/rand"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"io"
 	"math/big"
 	"net/http"
 	"net/url"
+	"sort"
 	"strings"
 	"time"
 
@@ -24,8 +27,9 @@ type ApiResult struct {
 
 // ApiClient 通用 API 客户端
 type ApiClient struct {
-	config *PlatformConfig
-	client *http.Client
+	config      *PlatformConfig
+	client      *http.Client
+	rateLimiter <-chan time.Time // 限流 ticker
 }
 
 // NewApiClient 创建客户端
@@ -34,10 +38,17 @@ func NewApiClient(config *PlatformConfig) *ApiClient {
 	if config.RequestTimeoutMs > 0 {
 		timeout = time.Duration(config.RequestTimeoutMs) * time.Millisecond
 	}
-	return &ApiClient{
+	ac := &ApiClient{
 		config: config,
 		client: &http.Client{Timeout: timeout},
 	}
+	// 初始化限流
+	if config.RateLimitPerMinute > 0 {
+		interval := time.Minute / time.Duration(config.RateLimitPerMinute)
+		ac.rateLimiter = time.Tick(interval)
+		logrus.Infof("限流已启用: %d 次/分钟, 间隔 %v", config.RateLimitPerMinute, interval)
+	}
+	return ac
 }
 
 // Get 发送 GET 请求（无参数）
@@ -85,6 +96,15 @@ func (c *ApiClient) doRequest(ctx context.Context, method, path string, body int
 }
 
 func (c *ApiClient) execute(ctx context.Context, method, path string, body interface{}, paramsInQuery bool) (*ApiResult, error) {
+	// 限流等待
+	if c.rateLimiter != nil {
+		select {
+		case <-c.rateLimiter:
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		}
+	}
+
 	start := time.Now()
 	fullURL := c.config.GetApiUrl(path)
 
@@ -104,6 +124,8 @@ func (c *ApiClient) execute(ctx context.Context, method, path string, body inter
 		}
 	}
 
+	// 计算签名并追加（如快手 API 的 MD5 签名）
+	fullURL = c.applySignature(fullURL, body, paramsInQuery)
 	logrus.Infof("请求 URL: %s", fullURL)
 
 	req, err := http.NewRequestWithContext(ctx, method, fullURL, reqBody)
@@ -192,6 +214,7 @@ func (c *ApiClient) applyAuthURL(rawURL string) string {
 		for k, v := range eq {
 			val := fmt.Sprintf("%v", v)
 			val = strings.ReplaceAll(val, "{timestamp}", fmt.Sprintf("%d", time.Now().Unix()))
+			val = strings.ReplaceAll(val, "{timestamp_ms}", fmt.Sprintf("%d", time.Now().UnixMilli()))
 			val = strings.ReplaceAll(val, "{nonce}", generateNonce())
 			extraParams[k] = val
 		}
@@ -250,3 +273,58 @@ func generateNonce() string {
 	r, _ := rand.Int(rand.Reader, big.NewInt(10000))
 	return fmt.Sprintf("%012d%04d", nanoPart, r.Int64())
 }
+
+// applySignature 计算签名并追加到 URL（支持快手等平台的 MD5 签名）
+func (c *ApiClient) applySignature(rawURL string, body interface{}, paramsInQuery bool) string {
+	cfg := c.config.AuthConfig
+	if cfg == nil {
+		return rawURL
+	}
+
+	signAlgo, _ := cfg["sign_algorithm"].(string)
+	if signAlgo == "" {
+		return rawURL
+	}
+	appSecret, _ := cfg["app_secret"].(string)
+	if appSecret == "" && c.config.AppSecret != "" {
+		appSecret = c.config.AppSecret
+	}
+	if appSecret == "" {
+		return rawURL
+	}
+
+	parsed, _ := url.Parse(rawURL)
+	q := parsed.Query()
+
+	// 收集所有参数并按 key 排序
+	keys := make([]string, 0, len(q))
+	for k := range q {
+		if k == "sign" {
+			continue
+		}
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	var signStr string
+	for _, k := range keys {
+		signStr += k + "=" + q.Get(k) + "&"
+	}
+	signStr += "key=" + appSecret
+
+	var sign string
+	switch signAlgo {
+	case "md5":
+		h := md5.Sum([]byte(signStr))
+		sign = hex.EncodeToString(h[:])
+	case "md5_upper":
+		h := md5.Sum([]byte(signStr))
+		sign = strings.ToUpper(hex.EncodeToString(h[:]))
+	default:
+		return rawURL
+	}
+
+	q.Set("sign", sign)
+	parsed.RawQuery = q.Encode()
+	return parsed.String()
+}