feat: HTTP debug logging in client.do()

internal/provider/rainyun/client.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"os"
 	"time"
 )
 
@@ -17,9 +18,10 @@ type client struct {
 	httpClient *http.Client
 	baseURL    string
 	apiKey     string
+	debug      bool
 }
 
-func newClient(endpoint, apiKey string) *client {
+func newClient(endpoint, apiKey string, debug bool) *client {
 	if endpoint == "" {
 		endpoint = defaultEndpoint
 	}
@@ -27,6 +29,7 @@ func newClient(endpoint, apiKey string) *client {
 		httpClient: &http.Client{Timeout: 30 * time.Second},
 		baseURL:    endpoint,
 		apiKey:     apiKey,
+		debug:      debug,
 	}
 }
 
@@ -85,14 +88,23 @@ func (c *client) do(ctx context.Context, method, path string, body, result any,
 	}
 
 	var bodyReader io.Reader
+	var bodyBytes []byte
 	if body != nil {
 		b, err := json.Marshal(body)
 		if err != nil {
 			return fmt.Errorf("marshal request: %w", err)
 		}
+		bodyBytes = b
 		bodyReader = bytes.NewReader(b)
 	}
 
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "[debug] > %s %s\n", method, u)
+		if bodyBytes != nil {
+			fmt.Fprintf(os.Stderr, "[debug] %s\n", bodyBytes)
+		}
+	}
+
 	req, err := http.NewRequestWithContext(ctx, method, u, bodyReader)
 	if err != nil {
 		return fmt.Errorf("create request: %w", err)
@@ -101,6 +113,7 @@ func (c *client) do(ctx context.Context, method, path string, body, result any,
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Accept", "application/json")
 
+	start := time.Now()
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("request failed: %w", err)
@@ -112,6 +125,11 @@ func (c *client) do(ctx context.Context, method, path string, body, result any,
 		return fmt.Errorf("read response: %w", err)
 	}
 
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "[debug] < %d %s %s\n", resp.StatusCode, http.StatusText(resp.StatusCode), time.Since(start).Round(time.Millisecond))
+		fmt.Fprintf(os.Stderr, "[debug] %s\n", respBody)
+	}
+
 	var apiResp apiResponse
 	if err := json.Unmarshal(respBody, &apiResp); err == nil {
 		// Rainyun uses code:200 and code:0 both as success indicators