feat(proxy): add proxy module

proxy/brightdata_provider.go

@@ -0,0 +1,105 @@
+package proxy
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"time"
+)
+
+// BrightDataProvider Bright Data动态获取IP提供者
+type BrightDataProvider struct {
+	endpoint string
+	token    string
+	zone     string
+	client   *http.Client
+}
+
+// NewBrightDataProvider 创建Bright Data IP提供者
+func NewBrightDataProvider(endpoint, token, zone string) *BrightDataProvider {
+	return &BrightDataProvider{
+		endpoint: endpoint,
+		token:    token,
+		zone:     zone,
+		client: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+	}
+}
+
+// BrightDataIPList Bright Data API返回的IP列表结构
+type BrightDataIPList struct {
+	IPs []struct {
+		IP      string                 `json:"ip"`
+		Maxmind string                 `json:"maxmind"`
+		Ext     map[string]interface{} `json:"ext"`
+	} `json:"ips"`
+}
+
+func (p *BrightDataProvider) GetIPList() ([]ProxyIP, error) {
+	return p.fetchIPList()
+}
+
+func (p *BrightDataProvider) RefreshIPList() ([]ProxyIP, error) {
+	return p.fetchIPList()
+}
+
+func (p *BrightDataProvider) fetchIPList() ([]ProxyIP, error) {
+	// 构建请求URL
+	url := p.endpoint
+	if p.zone != "" {
+		url = fmt.Sprintf("%s?zone=%s", p.endpoint, p.zone)
+	}
+
+	// 创建HTTP请求
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, fmt.Errorf("创建HTTP请求失败: %w", err)
+	}
+
+	// 设置授权头
+	if p.token != "" {
+		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", p.token))
+	}
+
+	// 发送请求
+	resp, err := p.client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("发送HTTP请求失败: %w", err)
+	}
+	defer resp.Body.Close()
+
+	// 读取响应体
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("读取HTTP响应失败: %w", err)
+	}
+
+	// 检查状态码
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API返回错误状态码 %d: %s", resp.StatusCode, string(body))
+	}
+
+	// 解析JSON数据（支持Bright Data格式）
+	var ipList BrightDataIPList
+	if err := json.Unmarshal(body, &ipList); err != nil {
+		return nil, fmt.Errorf("解析JSON数据失败: %w", err)
+	}
+
+	// 转换为ProxyIP列表
+	result := make([]ProxyIP, 0, len(ipList.IPs))
+	for _, ip := range ipList.IPs {
+		result = append(result, ProxyIP{
+			IP:       ip.IP,
+			Protocol: "http",
+			Ext:      ip.Ext,
+		})
+	}
+
+	if len(result) == 0 {
+		return nil, fmt.Errorf("API返回的IP列表为空")
+	}
+
+	return result, nil
+}