working commit

pkg/servcli/httpcall.go

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ */
+package servcli
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+)
+
+func (cli *Client) doHTTPCall(ctx context.Context, host, obj, oper string, req []byte) ([]byte, error) {
+	var err error
+	var res []byte
+
+	reader := bytes.NewReader(req)
+	ref, err := NewReferer(host, obj, oper)
+	if err != nil {
+		return res, err
+	}
+	httpReq, err := http.NewRequestWithContext(ctx, http.MethodPost, ref.Point(), reader)
+	if err != nil {
+		return res, err
+	}
+	httpReq.Header.Set("User-Agent", cli.userAgent)
+	httpReq.Header.Set("Accept", "*/*")
+	httpResp, err := cli.httpClient.Do(httpReq)
+	if err != nil {
+		return res, err
+	}
+	defer httpResp.Body.Close()
+	if httpResp.StatusCode != http.StatusOK {
+		err := fmt.Errorf("Unexpected response code: %s", httpResp.Status)
+		return res, err
+	}
+	contentLength := httpResp.Header.Get("Content-Length")
+	if contentLength == "" {
+		err := fmt.Errorf("Content-Length header is missing")
+		return res, err
+	}
+	blobSize, err := strconv.ParseInt(contentLength, 10, 64)
+	if err != nil {
+		return res, err
+	}
+	buffer := bytes.NewBuffer(nil)
+	recSize, err := io.Copy(buffer, httpResp.Body)
+	if blobSize != recSize {
+		err := fmt.Errorf("Mismatch declared and actual body size, %d and %d", blobSize, recSize)
+		return res, err
+	}
+	res = buffer.Bytes()
+	return res, err
+}