bug(sdk/go): http client generates invalid header values

[tdakkota]

Sending a select_rows command with a placeholder with a binary value leads to a net/http: invalid header field value for "X-Yt-Parameters" error.

It seems YSON text encoder does not escape some characters considered by HTTP as control.

Reproducer

package internal_test

import (
	"context"
	"fmt"
	"testing"

	"go.uber.org/zap/zaptest"
	ytzap "go.ytsaurus.tech/library/go/core/log/zap"
	"go.ytsaurus.tech/yt/go/yson"
	"go.ytsaurus.tech/yt/go/yt"
	"go.ytsaurus.tech/yt/go/yt/ythttp"
)

// placeholderSet is a simple wrapper to encode placeholder values.
//
// See https://github.com/ytsaurus/ytsaurus/blob/bbaedcf016db5e599563bb3f3b5ba87b047b4faa/yt/yt/library/query/base/query_preparer.cpp#L2461.
type placeholderSet struct {
	values []any
}

func (p placeholderSet) MarshalYSON(w *yson.Writer) error {
	w.BeginMap()
	for i, v := range p.values {
		w.MapKeyString(fmt.Sprintf("placeholder%d", i))
		w.Any(v)
	}
	w.EndMap()
	return nil
}

func TestPlaceholders(t *testing.T) {
	ctx := context.Background()

	log := zaptest.NewLogger(t)
	yc, err := ythttp.NewClient(&yt.Config{
		Logger: &ytzap.Logger{L: log},
	})
	if err != nil {
		t.Fatal(err)
	}

	var (
		id = [16]byte{
			0x1f, 0x1f, 0x1f, 0x1f, // <- 0x1f is a control character (unit separator)
			0x1f, 0x1f, 0x1f, 0x1f,
			0x1f, 0x1f, 0x1f, 0x1f,
			0x1f, 0x1f, 0x1f, 0x1f,
		}
		// Table schema does not matter, since query does not actually reach the proxy.
		query        = "* from [//table] where uuid = {placeholder0}"
		placeholders = placeholderSet{
			values: []any{id[:]},
		}
	)

	r, err := yc.SelectRows(ctx, query, &yt.SelectRowsOptions{
		PlaceholderValues: placeholders,
	})
	if err != nil {
		t.Fatal(err)
	}
	defer r.Close()
}

Logs

2023-06-01T21:28:18.836+0300      DEBUG   request started {"call_id": "f4d2888d-b94c52bc-7541d52f-5e7febcf", "method": "select_rows", "query": "* from [//table] where uuid = {placeholder0}"}
2023-06-01T21:28:18.836+0300      DEBUG   sending HTTP request    {"call_id": "f4d2888d-b94c52bc-7541d52f-5e7febcf", "proxy": "localhost:8000"}
2023-06-01T21:28:18.836+0300      WARN    retrying heavy read request     {"call_id": "f4d2888d-b94c52bc-7541d52f-5e7febcf", "backoff": "2.012342203s", "error": "Get \"http://localhost:8000/api/v4/select_rows\": net/http: invalid header field value for \"X-Yt-Parameters\""}