swift 动手写网络请求封装(仿照了一个大神的)不用导入第三方

2017-08-14  本文已影响0人  762683ff5d3d

新建一个类Network

importUIKit

//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

classNetwork: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:

*/

staticfuncget(url:String, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncget(url:String, params:Dictionary, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncpost(url:String, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncpost(url:String, params:Dictionary, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncrequest(method:String, url:String, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncrequest(method:String, url:String, params:Dictionary, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncrequest(method:String, url:String, files:Array, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =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:

*/

staticfuncrequest(method:String, url:String, params:Dictionary, files:Array, callback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void) {

letmanager =NetworkManager(url: url, method: method, params: params, files: files, callback: callback)

manager.fire()

}

}

// MARK: - nsdata属性是string的扩展

extensionString{

varnsdata:NSData{

returnself.dataUsingEncoding(NSUTF8StringEncoding)!

}

}

// MARK:定义的文件格式

structFile {

letname:String!

leturl: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:

classNetworkManager: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。

letboundary ="PitayaUGl0YXlh"

letmethod:String!

letparams:Dictionary

letcallback: (data:NSData!, response:NSURLResponse!, error:NSError!) ->Void

// add files

varfiles:Array

varsession:NSURLSession!

leturl:String!

varrequest:NSMutableURLRequest!

vartask: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

varlocalCertData:NSData!

varsSLValidateErrorCallBack: (() ->Void)?

// add files

init(url:String, method:String, params:Dictionary =Dictionary(), files:Array =Array(), 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

funcaddSSLPinning(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

@objcfuncURLSession(session:NSURLSession, didReceiveChallenge challenge:NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition,NSURLCredential?) ->Void) {

ifletlocalCertificateData =self.localCertData{

ifletserverTrust = challenge.protectionSpace.serverTrust,

certificate =SecTrustGetCertificateAtIndex(serverTrust,0),

remoteCertificateData:NSData=SecCertificateCopyData(certificate) {

iflocalCertificateData.isEqualToData(remoteCertificateData) {

letcredential =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:

funcfire() {

buildRequest()

buildBody()

fireTask()

}

//MARK:确定URL、http方法、添加特定的http头

funcbuildRequest() {

ifself.method=="GET"&&self.params.count>0{

self.request=NSMutableURLRequest(URL:NSURL(string:url+"?"+buildParams(self.params))!)

}

request.HTTPMethod=self.method

//   Content-Type

ifself.files.count>0{

request.addValue("multipart/form-data; boundary="+self.boundary, forHTTPHeaderField:"Content-Type")

}elseifself.params.count>0{

request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField:"Content-Type")

}

}

//MARK:填充HTTP Body

funcbuildBody() {

letdata =NSMutableData()

ifself.files.count>0{

ifself.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)inself.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)

}

forfileinself.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)

ifleta =NSData(contentsOfURL: file.url) {

data.appendData(a)

data.appendData("\r\n".nsdata)

}

}

data.appendData("--\(self.boundary)--\r\n".nsdata)

}elseifself.params.count>0&&self.method!="GET"{

data.appendData(buildParams(self.params).nsdata)

}

request.HTTPBody= data

}

//MARK:将请求任务执行

funcfireTask() {

task=session.dataTaskWithRequest(request, completionHandler: { (data, response, error) ->Voidin

self.callback(data: data, response: response, error: error)

})

task.resume()

}

// MARK:从Alamofire偷了三个函数

funcbuildParams(parameters: [String:AnyObject]) ->String{

varcomponents: [(String,String)] = []

forkeyinArray(parameters.keys).sort(<) {

letvalue:AnyObject! = parameters[key]

components +=self.queryComponents(key, value)

}

return(components.map{"\($0)=\($1)"}as[String]).joinWithSeparator("&")

}

funcqueryComponents(key:String,_value:AnyObject) -> [(String,String)] {

varcomponents: [(String,String)] = []

ifletdictionary = valueas? [String:AnyObject] {

for(nestedKey, value)indictionary {

components +=queryComponents("\(key)[\(nestedKey)]", value)

}

}elseifletarray = valueas? [AnyObject] {

forvalueinarray {

components +=queryComponents("\(key)", value)

}

}else{

components.appendContentsOf([(escape(key),escape("\(value)"))])

}

returncomponents

}

funcescape(string:String) ->String{

letlegalURLCharactersToBeEscaped:CFStringRef=":&=;+!@#$()',*"

returnCFURLCreateStringByAddingPercentEscapes(nil, string,nil, legalURLCharactersToBeEscaped,CFStringBuiltInEncodings.UTF8.rawValue)asString

}

}

主界面测试:

importUIKit

classViewController:UIViewController{

overridefuncviewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view, typically from a nib.

letmainBtn =UIButton.init(frame:CGRectMake(200,200,100,50))

mainBtn.backgroundColor=UIColor.redColor()

mainBtn.addTarget(self, action:#selector(mainBtnBeTapped), forControlEvents: .TouchUpInside)

self.view.addSubview(mainBtn)

}

funcmainBtnBeTapped(sender:AnyObject) {

leturl ="http://pitayaswift.sinaapp.com/pitaya.php"

Network.post(url, callback: { (data, response, error) ->Voidin

print("POST 1请求成功")

})

Network.post(url, params: ["post":"POST Network"], callback: { (data, response, error) ->Voidin

letstring =NSString(data: data, encoding:NSUTF8StringEncoding)as!String

print("POST 2请求成功"+ string)

})

Network.get(url, callback: { (data, response, error) ->Voidin

print("GET 1请求成功")

})

Network.get(url, params: ["get":"POST Network"], callback: { (data, response, error) ->Voidin

letstring =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) ->Voidin

letstring =NSString(data: data, encoding:NSUTF8StringEncoding)as!String

print("Request请求成功"+ string)

}

}

}

来一张测试图:

May there be enough clouds in your life to make a beautiful sunset...

原文: http://www.cnblogs.com/linxiu-0925/p/5761040.html
这篇文章写的还不错觉得还可以再提炼一下,后期有时间也会发布自己封装的

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