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Swift 的 新浪微博 OAuth 认证实现

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网络请求

Alamofire + SwiftyJSON

Alamofire
SwiftyJSON

封装网络请求

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import UIKit
import Alamofire
import SwiftyJSON

class HTTPTool{

    static let shared = HTTPTool()
    
}


extension HTTPTool {
    
    /// 网络请求方法
    ///
    /// - Parameters:
    ///   - url: url
    ///   - method: method
    ///   - params: params
    ///   - success: 请求成功: 返回SwiftyJSON对象(可直接取子对象)
    ///   - errors: errors
    func requestWithParameters(url: String, method: HTTPMethod, parameters params: Parameters, success: @escaping (_ json: JSON)->Void, errors: @escaping ()->Void) {
        
        Alamofire.request(url, method: method, parameters: params).responseJSON { (response) in
            switch response.result {
                
            case .success:
                if let value = response.result.value{
                    let json = JSON(value)
                    
                    guard json["_error"].string == nil else{
                        errors()
                        return
                    }
                    success(json)
                }
                break
                
            case .failure(let error):
                NSLog("error,failure: \(error)")
                errors()
                break
            }
        }
    }
}

OAuth认证

WebView加载授权网页

OAuth2的authorize接口

获取URL

定义 client_id 和 redirect_uri 为常量

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fileprivate let client_id = ""
fileprivate let redirect_uri = ""

拼接URL

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var oAuthURL:String {
    return "https://api.weibo.com/oauth2/authorize?client_id=\(client_id)&redirect_uri=\(redirect_uri)&display=mobile&forcelogin=true"
}

加载授权网页

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webView.loadRequest(request)

截取code

WebView代理

遵守协议并实现 shouldStartLoad 方法

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extension WBOAuthViewController: UIWebViewDelegate{
    
    func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool {
    
    }
}

截取code字段

code是跟随返回地址的参数

实现 shouldStartLoad 方法后可以得到所有网络请求 , 若请求包含字段 error_uri , 则授权失败 , 若请求字段包含 code , 则授权成功 , 得到正确的 code

是否包含字段

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let urlString = request.url?.query, urlString.hasPrefix("error_uri or code")

截取code字段

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let code = urlString.substring(from: "code=".endIndex)

处理AccessToken

请求token

5个必选参数

获取code之后立即发起token的网络请求 , 请求成功后保存到模型中 , 由于网络工具类直接返回 SwiftyJSON 对象 , 则可以通过 ObjectMapper (ObjectMapper) 转为模型对象

返回数据为字典,调用 json.dictionaryObject 方法

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/// 请求Token信息
///
/// - Parameters:
///   - code: code description
///   - callBack: callBack description
func requestAccessToken(code: String, callBack: @escaping (WBUserInfo?) -> ()){
    
    let urlString = "https://api.weibo.com/oauth2/access_token"

    let paramenters = [
        "client_id": client_id,
        "client_secret": client_secret,
        "grant_type": "authorization_code",
        "code": code,
        "redirect_uri": redirect_uri
    ]
    
    HTTPTool.shared.requestWithParameters(url: urlString, method: .post, parameters: paramenters, success: { (json) in
        let userInfo = Mapper<WBUserInfo>().map(JSONObject: json.dictionaryObject)
        callBack(userInfo)
    }) { 
        
    }
    
}

token本地化

模型转字典

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var userData = userInfo.toJSON()

存储

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func saveUserDefault(dict:[String: Any]) {
    userDict = dict
    UserDefaults.standard.set(dict, forKey: userInfoKey)
}

读取

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func loadUserDefault() -> [String: Any]? {
    if let data = UserDefaults.standard.dictionary(forKey: userInfoKey){
        return data
    }
    return nil
}

根据token存储状态判断登录

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func isLogin() -> Bool {
    if let userDict = loadUserDefault() {
        let isToken = userDict["access_token"] != nil
        return isToken
    }
    return false
}