refactor(backend): service http ports

backend/internal/repository/pricing_service.go

@@ -0,0 +1,73 @@
+package repository
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+
+	"sub2api/internal/service"
+)
+
+type pricingRemoteClient struct {
+	httpClient *http.Client
+}
+
+func NewPricingRemoteClient() service.PricingRemoteClient {
+	return &pricingRemoteClient{
+		httpClient: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+	}
+}
+
+func (c *pricingRemoteClient) FetchPricingJSON(ctx context.Context, url string) ([]byte, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("HTTP %d", resp.StatusCode)
+	}
+
+	return io.ReadAll(resp.Body)
+}
+
+func (c *pricingRemoteClient) FetchHashText(ctx context.Context, url string) (string, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("HTTP %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	// 哈希文件格式：hash  filename 或者纯 hash
+	hash := strings.TrimSpace(string(body))
+	parts := strings.Fields(hash)
+	if len(parts) > 0 {
+		return parts[0], nil
+	}
+	return hash, nil
+}