BFNetRequestKit/BFNetRequestKit/Classes/SWNetRequest.swift

//
//  SWNetRequest.swift
//  LiteraryHeaven
//
//  Created by SanW on 2017/8/2.
//  Copyright © 2017年 ONON. All rights reserved.
//

import Alamofire
import UIKit

// 默认超时时间
public let timeoutInterval: TimeInterval = 30

// MARK: - 错误

/// 错误
public struct PQError: Error {
    public var msg: String? // 提示信息
    public var code: Int // 错误吗

    public init(msg: String?, code: Int = 0) {
        self.msg = msg
        self.code = code
    }

    public var localizedDescription: String {
        return msg ?? ""
    }
}

// MARK: - 网络请求

/// 网络请求
public class SWNetRequest: NSObject {
//    static let share = SWNetRequest()
    /// 回调方法
    public typealias completeHander = (_ jsonObject: Any?, _ error: PQError?, _ duration: TimeInterval?) -> Void

    static let sessionManager: Session? = {
        let configuration = URLSessionConfiguration.default
        configuration.timeoutIntervalForRequest = timeoutInterval
        return Session(configuration: configuration, delegate: SessionDelegate(), serverTrustManager: nil)
    }()

    static let reTrySessionManager: Session? = {
        let configuration = URLSessionConfiguration.default
        configuration.timeoutIntervalForRequest = 5
        return Session(configuration: configuration, delegate: SessionDelegate(), serverTrustManager: nil)
    }()

    /// get请求
    public class func getRequestData(url: String, parames: [String: Any]?, encoding: ParameterEncoding = URLEncoding.default, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        requestData(method: .get, encoding: encoding, url: url, parames: parames, timeoutInterval: timeoutInterval) { responseObject, error, timeline in
            response(responseObject, error, timeline)
        }
    }

    /// post请求
    public class func postRequestData(url: String, parames: [String: Any]?, encoding: ParameterEncoding = URLEncoding.default, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        requestData(method: .post, encoding: encoding, url: url, parames: parames, timeoutInterval: timeoutInterval) { responseObject, error, timeline in
            response(responseObject, error, timeline)
        }
    }

    // put请求
    public class func putRequestData(url: String, parames: [String: Any]?, encoding: ParameterEncoding = URLEncoding.default, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        requestData(method: .put, encoding: encoding, url: url, parames: parames, timeoutInterval: timeoutInterval) { responseObject, error, timeline in
            response(responseObject, error, timeline)
        }
    }

    /// delete请求
    public class func deleteRequestData(url: String, parames: [String: Any]?, encoding: ParameterEncoding = URLEncoding.default, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        requestData(method: .delete, encoding: encoding, url: url, parames: parames, timeoutInterval: timeoutInterval) { responseObject, error, timeline in
            response(responseObject, error, timeline)
        }
    }

    /// head请求
    public class func headRequestData(url: String, parames: [String: Any]?, encoding: ParameterEncoding = URLEncoding.default, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        requestData(method: .head, encoding: encoding, url: url, parames: parames, timeoutInterval: timeoutInterval) { responseObject, error, timeline in
            response(responseObject, error, timeline)
        }
    }

    /// 网络请求
    fileprivate class func requestData(method: HTTPMethod, encoding: ParameterEncoding, url: String, parames: [String: Any]?, timeoutInterval: TimeInterval = timeoutInterval, response: @escaping completeHander) {
        if !bf_validURL(url: url) {
            response(nil, PQError(msg: "非法地址", code: 0), nil)
            return
        }
        debugPrint("网络请求-发起：url = \(url),parames = \(parames ?? [:])")
        AF.request(url, method: method, parameters: parames, encoding: encoding, headers: nil, requestModifier: { request in
            request.timeoutInterval = timeoutInterval
        }).validate().responseJSON { jsonResponse in
            switch jsonResponse.result {
            case .success:
                let jsonData: Any = try! JSONSerialization.jsonObject(with: jsonResponse.data!, options: JSONSerialization.ReadingOptions.mutableContainers)
                debugPrint("网络请求-成功：url = \(jsonResponse.request?.url?.absoluteString ?? ""),jsonData = \(jsonData)")
                response(jsonData, nil, jsonResponse.metrics?.taskInterval.duration)
            case .failure:
                let code: Int? = jsonResponse.response?.statusCode
                response(nil, PQError(msg: (code == -1009 || code == -1001) ? "网络不可用" : jsonResponse.error?.localizedDescription, code: code ?? 10001), jsonResponse.metrics?.taskInterval.duration)
                debugPrint("网络请求-失败：url = \(jsonResponse.request?.url?.absoluteString ?? ""),error = \(String(describing: jsonResponse.error))")
            }
        }
    }

    /// 取消网络请求
    /// - Parameter url: 某一个地址，空则取消所有
    /// - Returns: <#description#>
    public class func cancelTask(url: String?) {
        sessionManager?.session.getAllTasks(completionHandler: { tasks in
            tasks.forEach { task in
                if task.currentRequest?.url?.absoluteString == url {
                    task.cancel()
                }
            }
        })
    }

    public class func bf_validURL(url: String?) -> Bool {
        if url == nil || (url?.count ?? 0) <= 4 || (!(url?.hasPrefix("http") ?? false) && !(url?.hasPrefix("https") ?? false)) {
            return false
        }
        return true
    }

    /// 获取网络状态
    /// - Returns: <#description#>
    public class func networkStatusDescription() -> String {
        let status = NetworkReachabilityManager(host: "www.baidu.com")?.status
        var statusStr: String!
        switch status {
        case .unknown:
            statusStr = "NETWORK_UNKNOWN"
        case .notReachable:
            statusStr = "NETWORK_NO"
        case .reachable(.cellular):
            statusStr = "4G/5G"
        case .reachable(.ethernetOrWiFi):
            statusStr = "Wi-Fi"
        default:
            statusStr = "NETWORK_UNKNOWN"
        }
        return statusStr
    }

    /// 判断是否有网
    /// - Returns: <#description#>
    public class func isNetReachabled() -> Bool {
        return NetworkReachabilityManager(host: "www.baidu.com")?.status == .reachable(.cellular) || NetworkReachabilityManager(host: "www.baidu.com")?.status == .reachable(.ethernetOrWiFi)
    }

    /// 获取ip地址
    /// - Returns: <#description#>
    public class func ipAddressDescription() -> String {
        var addresses = [String]()
        var ifaddr: UnsafeMutablePointer<ifaddrs>?
        if getifaddrs(&ifaddr) == 0 {
            var ptr = ifaddr
            while ptr != nil {
                let flags = Int32(ptr!.pointee.ifa_flags)
                var addr = ptr!.pointee.ifa_addr.pointee
                if (flags & (IFF_UP | IFF_RUNNING | IFF_LOOPBACK)) == (IFF_UP | IFF_RUNNING) {
                    if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
                        var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
                        if getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST) == 0 {
                            if let address = String(validatingUTF8: hostname) {
                                addresses.append(address)
                            }
                        }
                    }
                }
                ptr = ptr!.pointee.ifa_next
            }
            freeifaddrs(ifaddr)
        }
        return addresses.first ?? "0.0.0.0"
    }

    // 将原始的url编码为合法的url
    public class func bf_urlEncoded(url: String) -> String {
        let encodeUrlString = url.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
        return encodeUrlString ?? ""
    }

    // 将编码后的url转换回原始的url
    public class func bf_urlDecoded(url: String) -> String {
        return url.removingPercentEncoding ?? ""
    }
}