Function ClientRequest

lib/_http_client.js:192–461

(input, options, cb)

};

function ClientRequest(input, options, cb) {
  OutgoingMessage.call(this);

  if (typeof input === 'string') {
    const urlStr = input;
    input = urlToHttpOptions(new URL(urlStr));
  } else if (isURL(input)) {
    // url.URL instance
    input = urlToHttpOptions(input);
  } else {
    cb = options;
    options = input;
    input = null;
  }

  if (typeof options === 'function') {
    cb = options;
    options = input || kEmptyObject;
  } else {
    options = ObjectAssign({ __proto__: null }, input, options);
  }

  let agent = options.agent;
  const defaultAgent = options._defaultAgent || Agent.globalAgent;
  if (agent === false) {
    agent = new defaultAgent.constructor();
  } else if (agent === null || agent === undefined) {
    if (typeof options.createConnection !== 'function') {
      agent = defaultAgent;
    }
    // Explicitly pass through this statement as agent will not be used
    // when createConnection is provided.
  } else if (typeof agent.addRequest !== 'function') {
    throw new ERR_INVALID_ARG_TYPE('options.agent',
                                   ['Agent-like Object', 'undefined', 'false'],
                                   agent);
  }
  this.agent = agent;

  const protocol = options.protocol || defaultAgent.protocol;
  let expectedProtocol = defaultAgent.protocol;
  if (this.agent?.protocol)
    expectedProtocol = this.agent.protocol;

  if (options.path) {
    const path = String(options.path);
    if (INVALID_PATH_REGEX.test(path)) {
      debug('Path contains unescaped characters: "%s"', path);
      throw new ERR_UNESCAPED_CHARACTERS('Request path');
    }
  }

  if (protocol !== expectedProtocol) {
    throw new ERR_INVALID_PROTOCOL(protocol, expectedProtocol);
  }

  const defaultPort = options.defaultPort ||
                    (this.agent?.defaultPort);