106 lines
3.0 KiB
Go
106 lines
3.0 KiB
Go
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package repository
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import (
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"context"
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"fmt"
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"io"
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"log/slog"
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"net/http"
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"strings"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/pkg/httpclient"
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"github.com/Wei-Shaw/sub2api/internal/service"
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)
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type pricingRemoteClient struct {
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httpClient *http.Client
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}
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// pricingRemoteClientError 代理初始化失败时的错误占位客户端
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// 所有请求直接返回初始化错误，禁止回退到直连
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type pricingRemoteClientError struct {
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err error
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}
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func (c *pricingRemoteClientError) FetchPricingJSON(_ context.Context, _ string) ([]byte, error) {
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return nil, c.err
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}
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func (c *pricingRemoteClientError) FetchHashText(_ context.Context, _ string) (string, error) {
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return "", c.err
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}
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// NewPricingRemoteClient 创建定价数据远程客户端
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// proxyURL 为空时直连，支持 http/https/socks5/socks5h 协议
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// 代理配置失败时行为由 allowDirectOnProxyError 控制：
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// - false（默认）：返回错误占位客户端，禁止回退到直连
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// - true：回退到直连（仅限管理员显式开启）
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func NewPricingRemoteClient(proxyURL string, allowDirectOnProxyError bool) service.PricingRemoteClient {
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// 安全说明：httpclient.GetClient 的错误链（url.Parse / proxyutil）不含明文代理凭据，
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// 但仍通过 slog 仅在服务端日志记录，不会暴露给 HTTP 响应。
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sharedClient, err := httpclient.GetClient(httpclient.Options{
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Timeout: 30 * time.Second,
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ProxyURL: proxyURL,
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})
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if err != nil {
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if strings.TrimSpace(proxyURL) != "" && !allowDirectOnProxyError {
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slog.Warn("proxy client init failed, all requests will fail", "service", "pricing", "error", err)
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return &pricingRemoteClientError{err: fmt.Errorf("proxy client init failed and direct fallback is disabled; set security.proxy_fallback.allow_direct_on_error=true to allow fallback: %w", err)}
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}
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sharedClient = &http.Client{Timeout: 30 * time.Second}
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}
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return &pricingRemoteClient{
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httpClient: sharedClient,
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}
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}
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func (c *pricingRemoteClient) FetchPricingJSON(ctx context.Context, url string) ([]byte, error) {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return nil, err
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}
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resp, err := c.httpClient.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 func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("HTTP %d", resp.StatusCode)
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}
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return io.ReadAll(resp.Body)
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}
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func (c *pricingRemoteClient) FetchHashText(ctx context.Context, url string) (string, error) {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return "", err
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}
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return "", err
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusOK {
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return "", fmt.Errorf("HTTP %d", resp.StatusCode)
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return "", err
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}
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// 哈希文件格式：hash filename 或者纯 hash
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hash := strings.TrimSpace(string(body))
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parts := strings.Fields(hash)
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if len(parts) > 0 {
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return parts[0], nil
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}
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return hash, nil
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}
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