basant307/AI_Governance_Project

1import { Agent } from 'http'2import { RequestOptions, Agent as HttpsAgent } from 'https'3import { Logger } from '@open-draft/logger'4 5const logger = new Logger('utils getUrlByRequestOptions')6 7// Request instance constructed by the "request" library8// has a "self" property that has a "uri" field. This is9// reproducible by performing a "XMLHttpRequest" request in JSDOM.10export interface RequestSelf {11  uri?: URL12}13 14export type ResolvedRequestOptions = RequestOptions & RequestSelf15 16export const DEFAULT_PATH = '/'17const DEFAULT_PROTOCOL = 'http:'18const DEFAULT_HOSTNAME = 'localhost'19const SSL_PORT = 44320 21function getAgent(22  options: ResolvedRequestOptions23): Agent | HttpsAgent | undefined {24  return options.agent instanceof Agent ? options.agent : undefined25}26 27function getProtocolByRequestOptions(options: ResolvedRequestOptions): string {28  if (options.protocol) {29    return options.protocol30  }31 32  const agent = getAgent(options)33  const agentProtocol = (agent as RequestOptions)?.protocol34 35  if (agentProtocol) {36    return agentProtocol37  }38 39  const port = getPortByRequestOptions(options)40  const isSecureRequest = options.cert || port === SSL_PORT41 42  return isSecureRequest ? 'https:' : options.uri?.protocol || DEFAULT_PROTOCOL43}44 45function getPortByRequestOptions(46  options: ResolvedRequestOptions47): number | undefined {48  // Use the explicitly provided port.49  if (options.port) {50    return Number(options.port)51  }52 53  // Otherwise, try to resolve port from the agent.54  const agent = getAgent(options)55 56  if ((agent as HttpsAgent)?.options.port) {57    return Number((agent as HttpsAgent).options.port)58  }59 60  if ((agent as RequestOptions)?.defaultPort) {61    return Number((agent as RequestOptions).defaultPort)62  }63 64  // Lastly, return undefined indicating that the port65  // must inferred from the protocol. Do not infer it here.66  return undefined67}68 69interface RequestAuth {70  username: string71  password: string72}73 74function getAuthByRequestOptions(75  options: ResolvedRequestOptions76): RequestAuth | undefined {77  if (options.auth) {78    const [username, password] = options.auth.split(':')79    return { username, password }80  }81}82 83/**84 * Returns true if host looks like an IPv6 address without surrounding brackets85 * It assumes any host containing `:` is definitely not IPv4 and probably IPv6,86 * but note that this could include invalid IPv6 addresses as well.87 */88function isRawIPv6Address(host: string): boolean {89  return host.includes(':') && !host.startsWith('[') && !host.endsWith(']')90}91 92function getHostname(options: ResolvedRequestOptions): string | undefined {93  let host = options.hostname || options.host94 95  if (host) {96    if (isRawIPv6Address(host)) {97       host = `[${host}]`98    }99 100    // Check the presence of the port, and if it's present,101    // remove it from the host, returning a hostname.102    return new URL(`http://${host}`).hostname103  }104 105  return DEFAULT_HOSTNAME106}107 108/**109 * Creates a `URL` instance from a given `RequestOptions` object.110 */111export function getUrlByRequestOptions(options: ResolvedRequestOptions): URL {112  logger.info('request options', options)113 114  if (options.uri) {115    logger.info(116      'constructing url from explicitly provided "options.uri": %s',117      options.uri118    )119    return new URL(options.uri.href)120  }121 122  logger.info('figuring out url from request options...')123 124  const protocol = getProtocolByRequestOptions(options)125  logger.info('protocol', protocol)126 127  const port = getPortByRequestOptions(options)128  logger.info('port', port)129 130  const hostname = getHostname(options)131  logger.info('hostname', hostname)132 133  const path = options.path || DEFAULT_PATH134  logger.info('path', path)135 136  const credentials = getAuthByRequestOptions(options)137  logger.info('credentials', credentials)138 139  const authString = credentials140    ? `${credentials.username}:${credentials.password}@`141    : ''142  logger.info('auth string:', authString)143 144  const portString = typeof port !== 'undefined' ? `:${port}` : ''145  const url = new URL(`${protocol}//${hostname}${portString}${path}`)146  url.username = credentials?.username || ''147  url.password = credentials?.password || ''148 149  logger.info('created url:', url)150 151  return url152}153