working commit

pkg/servcli/gethello.go

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ */
+package servcli
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"mproxy/app/servoper"
+)
+
+func (cli *Client) GetHello(ctx context.Context, rawpath string) error {
+	var err error
+	req := servoper.GetHelloParams{}
+	reqdata, err := json.Marshal(req)
+	if err != nil {
+		return err
+	}
+	_, err = cli.DoCall(ctx, rawpath, reqdata)
+	if err != nil {
+		return err
+	}
+	return err
+}
+
+func (cli *Client) DoCall(ctx context.Context, rawpath string, reqdata []byte) ([]byte, error) {
+	var err error
+	res := make([]byte, 0)
+
+	ref, err := ParsePath(rawpath)
+	if err != nil {
+		return res, err
+	}
+	uri := ref.HelloEP()
+	reader := bytes.NewReader(reqdata)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, uri, reader)
+	if err != nil {
+		return res, err
+	}
+	req.Header.Set("User-Agent", cli.userAgent)
+	req.Header.Set("Accept", "*/*")
+	resp, err := cli.httpClient.Do(req)
+	if err != nil {
+		return res, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusNotFound {
+		return res, err
+	}
+	if resp.StatusCode != http.StatusOK {
+		err := fmt.Errorf("Unexpected response code %s", resp.Status)
+		return res, err
+	}
+	contentLength := resp.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 := Copy(ctx, buffer, resp.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
+}