Na}{

File Content: `subprotocol.js`

'use strict';

const { tokenChars } = require('./validation');

/**
 * Parses the `Sec-WebSocket-Protocol` header into a set of subprotocol names.
 *
 * @param {String} header The field value of the header
 * @return {Set} The subprotocol names
 * @public
 */
function parse(header) {
  const protocols = new Set();
  let start = -1;
  let end = -1;
  let i = 0;

  for (i; i < header.length; i++) {
    const code = header.charCodeAt(i);

    if (end === -1 && tokenChars[code] === 1) {
      if (start === -1) start = i;
    } else if (
      i !== 0 &&
      (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
    ) {
      if (end === -1 && start !== -1) end = i;
    } else if (code === 0x2c /* ',' */) {
      if (start === -1) {
        throw new SyntaxError(`Unexpected character at index ${i}`);
      }

      if (end === -1) end = i;

      const protocol = header.slice(start, end);

      if (protocols.has(protocol)) {
        throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
      }

      protocols.add(protocol);
      start = end = -1;
    } else {
      throw new SyntaxError(`Unexpected character at index ${i}`);
    }
  }

  if (start === -1 || end !== -1) {
    throw new SyntaxError('Unexpected end of input');
  }

  const protocol = header.slice(start, i);

  if (protocols.has(protocol)) {
    throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
  }

  protocols.add(protocol);
  return protocols;
}

module.exports = { parse };

Name	Size	Permission
buffer-util.js	3056 bytes	0644
constants.js	479 bytes	0644
event-target.js	7321 bytes	0644
extension.js	6183 bytes	0644
limiter.js	1034 bytes	0644
permessage-deflate.js	14110 bytes	0644
receiver.js	16460 bytes	0644
sender.js	16700 bytes	0644
stream.js	4083 bytes	0644
subprotocol.js	1498 bytes	0644
validation.js	3903 bytes	0644
websocket-server.js	16254 bytes	0644
websocket.js	36462 bytes	0644

File Content: subprotocol.js

File Content: `subprotocol.js`