How to programmatically add a proxy to an NSURLSession

Question

Looking over the documentation of NSURLSession and NSURLSessionConfiguration, I was under the impression I should configure it with a dictionary li

Answer 1

Based on all previous responses, this works for Swift 4, both HTTP and HTTPS:

let proxyHost = "127.0.0.1"
let proxyPort = 8888
let configuration = URLSessionConfiguration.default
configuration.connectionProxyDictionary = [
    kCFNetworkProxiesHTTPEnable: true,
    kCFNetworkProxiesHTTPProxy: proxyHost,
    kCFNetworkProxiesHTTPPort: proxyPort,
    kCFNetworkProxiesHTTPSEnable: true,
    kCFNetworkProxiesHTTPSProxy: proxyHost,
    kCFNetworkProxiesHTTPSPort: proxyPort
]

proxyHost should be a hostname and not contain any URL scheme.