proxy.swift

import Alamofire

let configuration = URLSessionConfiguration.default
configuration.requestCachePolicy = URLRequest.CachePolicy.reloadIgnoringLocalCacheData

let proxyConfiguration: [AnyHashable : Any] = [
    kCFNetworkProxiesHTTPEnable as AnyHashable: true,

    kCFNetworkProxiesHTTPProxy as AnyHashable: host,
    kCFNetworkProxiesHTTPPort as AnyHashable: port,

    kCFStreamPropertyHTTPSProxyHost as AnyHashable: host,
    kCFStreamPropertyHTTPSProxyPort as AnyHashable: port,

    kCFProxyUsernameKey as AnyHashable: username,
    kCFProxyPasswordKey as AnyHashable: password,
]

configuration.httpAdditionalHeaders = [
    "Proxy-Authorization": HTTPHeader.authorization(username: username, password: password).value
]

configuration.connectionProxyDictionary = proxyConfiguration