新建一个类Network
import UIKit
//NSURLSession 的使用过程:
//
//构造 NSURLRequest
//确定 URL
//确定 HTTP 方法(GET、POST 等)
//添加特定的 HTTP 头
//填充 HTTP Body
//驱动 session.dataTaskWithRequest 方法,开始请求
//(5)设置 SSL 证书钢钉。在我们调用 HTTPS 协议的时候,事先把 SSL 证书存到 App 本地,然后在每次请求的时候都进行一次验证,避免中间人攻击(Man-in-the-middle attack)。同时,这个功能也是我们使用自签名证书时候必须的,因为系统默认会拒绝我们自己签名的不受信任的证书,导致连接失败。
// MARK: 提供的各种调用接口:GET,POST,文件上传
class Network: NSObject{
// 不带参数的get请求
/*
请求方法的URL url: get
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func get(url: String, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: "GET", callback: callback)
manager.fire()
}
// 带参数的get请求
/*
请求方法的URL url: get
请求参数 params:dictionary
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func get(url: String, params: Dictionary<String, AnyObject>, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: "GET", params: params, callback: callback)
manager.fire()
}
// 不带参数的post请求
/*
请求方法的URL url: post
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func post(url: String, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: "POST", callback: callback)
manager.fire()
}
// 带参数的post请求
/*
请求方法的URL url: post
请求参数 params:dictionary
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func post(url: String, params: Dictionary<String, AnyObject>, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: "POST", params: params, callback: callback)
manager.fire()
}
//MARK: 不带 params 和 files 的接口
/*
提供请求方法类型 method: String
请求方法的URL url: String
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func request(method: String, url: String, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: method, callback: callback)
manager.fire()
}
//MARK: 带参数不带files
/*
提供请求方法类型 method: String
请求方法的URL url: String
请求方法的参数 params: Dictionary
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func request(method: String, url: String, params: Dictionary<String, AnyObject>, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: method, params: params, callback: callback)
manager.fire()
}
//MARK:不带参数带files
/*
提供请求方法类型 method: String
请求方法的URL url: String
请求文件 files:array
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func request(method: String, url: String, files: Array<File>, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: method, files: files, callback: callback)
manager.fire()
}
//MARK: 带 参数和files 的接口
/*
提供请求方法类型 method: String
请求方法的URL url: String
请求方法的参数 params: Dictionary
请求文件 files:array
callback闭包 [data: 请求成功的数据,
response: 拿到数据的解析回应,
error: 请求错误]
NetworkManager() 一个初始化URL、params、http、files文件的类
fire() 使用一个统一的方法来驱动上面三个 function(),完成请求:
*/
static func request(method: String, url: String, params: Dictionary<String, AnyObject>, files: Array<File>, callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
let manager = NetworkManager(url: url, method: method, params: params, files: files, callback: callback)
manager.fire()
}
}
// MARK: - nsdata属性是string的扩展
extension String {
var nsdata: NSData {
return self.dataUsingEncoding(NSUTF8StringEncoding)!
}
}
// MARK: 定义的文件格式
struct File {
let name: String!
let url: NSURL!
init(name: String, url: NSURL) {
self.name = name
self.url = url
}
}
// MARK: - 新建一个 NetworkManager 类,将 URL、params、files 等设为成员变量,让他们在构造函数中初始化:
class NetworkManager: NSObject, NSURLSessionDelegate { //证书实现NSURLSessionDelegate的协议
//todo boundary 是我们自己指定的文件间隔符。
let boundary = "PitayaUGl0YXlh"
let method: String!
let params: Dictionary<String, AnyObject>
let callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void
// add files
var files: Array<File>
var session: NSURLSession!
let url: String!
var request: NSMutableURLRequest!
var task: NSURLSessionTask!
//ssl 增加两个成员变量实现ssl证书检查代理方法干预网络请求
var localCertData: NSData!
var sSLValidateErrorCallBack: (() -> Void)?
// add files
init(url: String, method: String, params: Dictionary<String, AnyObject> = Dictionary<String, AnyObject>(), files: Array<File> = Array<File>(), callback: (data: NSData!, response: NSURLResponse!, error: NSError!) -> Void) {
self.url = url
self.request = NSMutableURLRequest(URL: NSURL(string: url)!)
self.method = method
self.params = params
self.callback = callback
// add files
self.files = files
super.init()
//ssl 自定义nsurlsession对象
self.session = NSURLSession(configuration: NSURLSession.sharedSession().configuration, delegate: self, delegateQueue: NSURLSession.sharedSession().delegateQueue)
}
//ssl 增加设置ssl函数
func addSSLPinning(LocalCertData data: NSData, SSLValidateErrorCallBack: (()->Void)? = nil) {
self.localCertData = data
self.sSLValidateErrorCallBack = SSLValidateErrorCallBack
}
//ssl 实现证书代理方法,介入网络请求
@objc func URLSession(session: NSURLSession, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) {
if let localCertificateData = self.localCertData {
if let serverTrust = challenge.protectionSpace.serverTrust,
certificate = SecTrustGetCertificateAtIndex(serverTrust, 0),
remoteCertificateData: NSData = SecCertificateCopyData(certificate) {
if localCertificateData.isEqualToData(remoteCertificateData) {
let credential = NSURLCredential(forTrust: serverTrust)
challenge.sender?.useCredential(credential, forAuthenticationChallenge: challenge)
completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, credential)
} else {
challenge.sender?.cancelAuthenticationChallenge(challenge)
completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil)
self.sSLValidateErrorCallBack?()
}
} else {
NSLog("Get RemoteCertificateData or LocalCertificateData error!")
}
} else {
completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, nil)
}
}
//MARK: 使用一个统一的方法来驱动上面三个 function,完成请求:
func fire() {
buildRequest()
buildBody()
fireTask()
}
//MARK: 确定URL、http方法、添加特定的http头
func buildRequest() {
if self.method == "GET" && self.params.count > 0 {
self.request = NSMutableURLRequest(URL: NSURL(string: url + "?" + buildParams(self.params))!)
}
request.HTTPMethod = self.method
// Content-Type
if self.files.count > 0 {
request.addValue("multipart/form-data; boundary=" + self.boundary, forHTTPHeaderField: "Content-Type")
} else if self.params.count > 0 {
request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
}
}
//MARK: 填充 HTTP Body
func buildBody() {
let data = NSMutableData()
if self.files.count > 0 {
if self.method == "GET" {
NSLog("\n\n------------------------\nThe remote server may not accept GET method with HTTP body. But Pitaya will send it anyway.\n------------------------\n\n")
}
for (key, value) in self.params {
data.appendData("--\(self.boundary)\r\n".nsdata)
data.appendData("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n".nsdata)
data.appendData("\(value.description)\r\n".nsdata)
}
for file in self.files {
data.appendData("--\(self.boundary)\r\n".nsdata)
data.appendData("Content-Disposition: form-data; name=\"\(file.name)\"; filename=\"\(NSString(string: file.url.description).lastPathComponent)\"\r\n\r\n".nsdata)
if let a = NSData(contentsOfURL: file.url) {
data.appendData(a)
data.appendData("\r\n".nsdata)
}
}
data.appendData("--\(self.boundary)--\r\n".nsdata)
} else if self.params.count > 0 && self.method != "GET" {
data.appendData(buildParams(self.params).nsdata)
}
request.HTTPBody = data
}
//MARK: 将请求任务执行
func fireTask() {
task = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in
self.callback(data: data, response: response, error: error)
})
task.resume()
}
// MARK: 从 Alamofire 偷了三个函数
func buildParams(parameters: [String: AnyObject]) -> String {
var components: [(String, String)] = []
for key in Array(parameters.keys).sort(<) {
let value: AnyObject! = parameters[key]
components += self.queryComponents(key, value)
}
return (components.map{"\($0)=\($1)"} as [String]).joinWithSeparator("&")
}
func queryComponents(key: String, _ value: AnyObject) -> [(String, String)] {
var components: [(String, String)] = []
if let dictionary = value as? [String: AnyObject] {
for (nestedKey, value) in dictionary {
components += queryComponents("\(key)[\(nestedKey)]", value)
}
} else if let array = value as? [AnyObject] {
for value in array {
components += queryComponents("\(key)", value)
}
} else {
components.appendContentsOf([(escape(key), escape("\(value)"))])
}
return components
}
func escape(string: String) -> String {
let legalURLCharactersToBeEscaped: CFStringRef = ":&=;+!@#$()',*"
return CFURLCreateStringByAddingPercentEscapes(nil, string, nil, legalURLCharactersToBeEscaped, CFStringBuiltInEncodings.UTF8.rawValue) as String
}
}
主界面测试:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let mainBtn = UIButton.init(frame: CGRectMake(200, 200, 100, 50))
mainBtn.backgroundColor = UIColor.redColor()
mainBtn.addTarget(self, action: #selector(mainBtnBeTapped), forControlEvents: .TouchUpInside)
self.view.addSubview(mainBtn)
}
func mainBtnBeTapped(sender:AnyObject) {
let url = "http://pitayaswift.sinaapp.com/pitaya.php"
Network.post(url, callback: { (data, response, error) -> Void in
print("POST 1 请求成功")
})
Network.post(url, params: ["post": "POST Network"], callback: { (data, response, error) -> Void in
let string = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
print("POST 2 请求成功 " + string)
})
Network.get(url, callback: { (data, response, error) -> Void in
print("GET 1 请求成功")
})
Network.get(url, params: ["get": "POST Network"], callback: { (data, response, error) -> Void in
let string = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
print("GET 2 请求成功 " + string)
})
Network.request("GET", url: url, params: ["get": "Request Network"]) { (data, response, error) -> Void in
let string = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
print("Request 请求成功 " + string)
}
}
}
来一张测试图: