인증 세션을 부여하고 URL을 로드한다【Swift3.0】【Alamofire4.2.0】

전제

1. 인증 세션 취득

// Swift 3.0
// Alamofire 4.2.0

/**
　認証セッション（Cookie）を取得・保存する     

 - parameter authUrlString: 認証(ログイン)URL 
 - parameter authParams: 認証情報ディクショナリ
 - returns: void
*/
func getAuthSession(_ authUrlString:String,authParams:Dictionary<String,String>) {

    let storage = HTTPCookieStorage.shared

    // Cookieリセット
    for cookie in storage.cookies! {
        storage.deleteCookie(cookie)
    }

    var parameters:Dictionary<String,String> = [:]

    for (key, value) in authParams {
        parameters.updateValue(value, forKey: key)
    }

    Alamofire.request(authUrlString, method:.post, parameters:parameters ).response { response in

        let res = response.response
        let cookies = HTTPCookie.cookies(withResponseHeaderFields: res?.allHeaderFields as! [String : String], for: (res?.url!)!)

    // Cookie保存    
    for i in 0 ..< cookies.count {
        let cookie = cookies[i]

        HTTPCookieStorage.shared.setCookie(cookie)
    }
}

2. 인증 세션이있는 URL로드

/**
　認証セッション付きでURLをロードする     

 - parameter urlString: URL文字列
 - parameter authUrlString: URL文字列
 - returns: void
*/
func loadRequestWithAuthSession(_ urlString:String,authUrlString:String,webView:UIWebView) {

    // セッション付きでロードしたいURL
    let url = URL(string: urlString)

    // 認証(ログイン)URL
    let authUrl = URL(string: authUrlString)

    var request = URLRequest(url: url! as URL)

    let cookies = HTTPCookieStorage.shared.cookies(for: authUrl! as URL)
    let header  = HTTPCookie.requestHeaderFields(with: cookies!)
    request.allHTTPHeaderFields = header

    // ロード
    webView.loadRequest(request as URLRequest)

}

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