// ---------------------------------------------------------------------------// Static request headers for a remote MCP server.//// Some MCP endpoints sit behind an edge authenticator rather than the MCP// authorization spec — Cloudflare Access, for example, wants a// `CF-Access-Client-Id` / `CF-Access-Client-Secret` pair on every request and// answers 403 without them. Those are properties of the ENDPOINT, not of an// account: every caller sends the same pair, and the server behind them still// does its own MCP-level auth. They therefore belong in the integration's// static `headers` config, which the probe and the live transport already// read, and NOT in an auth method (an auth method carries one per-account// credential value, so it cannot express a two-part token at all).//// The editor keeps rows rather than a map so a half-typed row survives a// re-render. This module owns the row -> wire conversion.// --------------------------------------------------------------------------- export type McpHeaderRow = {  readonly name: string;  readonly value: string;}; export const emptyHeaderRow = (): McpHeaderRow => ({ name: "", value: "" }); /** RFC 7230 `token`: the only characters a header field name may contain. *  A name outside this set makes the whole request unsendable, so it is *  rejected in the editor instead of being discovered at connect time. */const HEADER_NAME_PATTERN = /^[!#$%&'*+\-.^_`|~0-9A-Za-z]+$/; /** Whether a row's name can be put on the wire. A blank name is not *  "invalid" — it is an unfinished row, which the editor leaves alone. */export const isValidHeaderName = (name: string): boolean => {  const trimmed = name.trim();  return trimmed.length === 0 || HEADER_NAME_PATTERN.test(trimmed);}; /** * Collapse editor rows into the wire `headers` map. * * Blank and malformed names are dropped: the first is a row the user has not * finished, the second cannot be sent at all. Names and values are trimmed — * RFC 7230 treats surrounding whitespace as no part of a field value, so a * token pasted with a trailing newline still works. * * Returns `undefined` when nothing is configured, so callers omit the field * rather than sending an empty object. */export const mcpHeadersFromRows = (  rows: readonly McpHeaderRow[],): Record<string, string> | undefined => {  const headers: Record<string, string> = {};  for (const row of rows) {    const name = row.name.trim();    if (!name || !HEADER_NAME_PATTERN.test(name)) continue;    headers[name] = row.value.trim();  }  return Object.keys(headers).length > 0 ? headers : undefined;};