@/utils#extractContentType TypeScript Examples

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Example #1
Source File: index.ts    From electron-request with MIT License 5 votes vote down vote up 
getRequestOptions = (constructorOptions: RequestConstructorOptions): RequestOptions => {
  const options = { ...DEFAULT_OPTIONS, ...constructorOptions };

  const method = options.method.toUpperCase();
  const { body, requestURL, query, headers: headerOptions } = options;

  if (body !== null && (method === METHOD_MAP.GET || method === METHOD_MAP.HEAD)) {
    throw new TypeError('Request with GET/HEAD method cannot have body');
  }

  const parsedURL = new URL(requestURL);
  if (!parsedURL.protocol || !parsedURL.hostname) {
    throw new TypeError('Only absolute URLs are supported');
  }
  if (!/^https?:$/.test(parsedURL.protocol)) {
    throw new TypeError('Only HTTP(S) protocols are supported');
  }
  if (query) {
    for (const [queryKey, queryValue] of Object.entries(query)) {
      parsedURL.searchParams.append(queryKey, queryValue);
    }
  }

  const headers = new Headers(headerOptions);
  // User cannot set content-length themself as per fetch spec
  headers.delete(HEADER_MAP.CONTENT_LENGTH);
  // Add compression header
  headers.set(HEADER_MAP.ACCEPT_ENCODING, SUPPORTED_COMPRESSIONS.join(','));
  // Add accept header
  if (!headers.has(HEADER_MAP.ACCEPT)) {
    headers.set(HEADER_MAP.ACCEPT, '*/*');
  }
  // Add connection header
  if (!headers.has(HEADER_MAP.CONNECTION)) {
    headers.set(HEADER_MAP.CONNECTION, 'close');
  }
  // Add content type header
  if (body && !headers.has(HEADER_MAP.CONTENT_TYPE)) {
    const contentType = extractContentType(body);
    if (contentType) {
      headers.append(HEADER_MAP.CONTENT_TYPE, contentType);
    }
  }

  return {
    ...options,
    method,
    parsedURL,
    headers,
  };
}