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proxy_config.ts
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proxy_config.ts
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import { HttpsProxyAgent, HttpsProxyAgentOptions } from 'https-proxy-agent'
import { SocksProxyAgent, SocksProxyAgentOptions } from 'socks-proxy-agent'
export type ProxyConfig = {
host: string
port: number
auth?: {
username: string
password: string
}
protocol: 'http' | 'https' | 'socks4' | 'socks4a' | 'socks5' | 'socks5h' | 'socks'
}
class ProxyProtocolError extends Error {}
const proxyAgent = (proxyConfig: ProxyConfig): HttpsProxyAgent | SocksProxyAgent => {
switch (proxyConfig.protocol) {
case 'http': {
let options: HttpsProxyAgentOptions = {
host: proxyConfig.host,
port: proxyConfig.port,
secureProxy: false
}
if (proxyConfig.auth) {
options = Object.assign(options, {
auth: `${proxyConfig.auth.username}:${proxyConfig.auth.password}`
})
}
const httpsAgent = new HttpsProxyAgent(options)
return httpsAgent
}
case 'https': {
let options: HttpsProxyAgentOptions = {
host: proxyConfig.host,
port: proxyConfig.port,
secureProxy: true
}
if (proxyConfig.auth) {
options = Object.assign(options, {
auth: `${proxyConfig.auth.username}:${proxyConfig.auth.password}`
})
}
const httpsAgent = new HttpsProxyAgent(options)
return httpsAgent
}
case 'socks4':
case 'socks4a': {
let options: SocksProxyAgentOptions = {
type: 4,
host: proxyConfig.host,
port: proxyConfig.port
}
if (proxyConfig.auth) {
options = Object.assign(options, {
userId: proxyConfig.auth.username,
password: proxyConfig.auth.password
})
}
const socksAgent = new SocksProxyAgent(options)
return socksAgent
}
case 'socks5':
case 'socks5h':
case 'socks': {
let options: SocksProxyAgentOptions = {
type: 5,
host: proxyConfig.host,
port: proxyConfig.port
}
if (proxyConfig.auth) {
options = Object.assign(options, {
userId: proxyConfig.auth.username,
password: proxyConfig.auth.password
})
}
const socksAgent = new SocksProxyAgent(options)
return socksAgent
}
default:
throw new ProxyProtocolError('protocol is not accepted')
}
}
export default proxyAgent