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export interface ParsedContentType {
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  media: string;
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  params: Record<string, string>;
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}
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export function parseContentTypeHeader(value: string): ParsedContentType {
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  const [rawMedia, ...rest] = value.split(";").map((part) => part.trim());
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  const params: Record<string, string> = {};
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  for (const part of rest) {
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    if (!part) continue;
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    const eq = part.indexOf("=");
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    if (eq === -1) continue;
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    const name = part.slice(0, eq).trim().toLowerCase();
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    let val = part.slice(eq + 1).trim();
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    if (val.startsWith('"') && val.endsWith('"')) val = val.slice(1, -1);
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    params[name] = val;
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  }
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  return { media: (rawMedia ?? "").toLowerCase(), params };
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}
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export function utf8CharsetOk(params: Record<string, string>): boolean {
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  return !params.charset || params.charset.toLowerCase() === "utf-8";
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}