广点通接口调用 swift 版本，调试一些时间终于调用成功！

GDTApi.swift

//
//  GDTApi.swift
//  zaozuo-ios
//
//  Created by wuchuanbo on 16/4/20.
//  Copyright © 2016年 zaozuo. All rights reserved.
//

import Foundation

class GDTApi {
    
    fileprivate static let encrypt_key = ""
    fileprivate static let sign_key = ""
    fileprivate static let gdt_uid = 
    fileprivate static let app_type = "IOS"
    fileprivate static let conv_type = "MOBILEAPP_ACTIVITE"
    fileprivate static let appid = 
    
    static func getGDTApiUrlWithWay2() -> String? {

        if let data = encryptRequestParam() {
            let url = "http://t.gdt.qq.com/conv/app/\(appid)/conv?v=\(data)&conv_type=\(conv_type)&app_type=\(app_type)&advertiser_id=\(gdt_uid)"
            return url
        }
        
        return nil
    }
    
    // 广点通参数加密
    fileprivate static func encryptRequestParam() -> String? {
        // 1.组装参数
        //click_id , 方案二不需要
        
        // muid
        let muid = genMuid()
        
        //conv_time
        let conv_time = generateConvTime()
        
        //conv_time 获取秒级的时间戳
        let queryString = "muid=\(muid)&conv_time=\(conv_time)"
        
        // 2.参数签名
        let url = "http://t.gdt.qq.com/conv/app/\(appid)/conv?\(queryString)"
        
        // 3.url编码,参数加密
        if let encodePage = urlEncode(url) {
            let property = "\(sign_key)&GET&\(encodePage)"
            let signature = MD5(property)
            
            let baseData = "\(queryString)&sign=\(signature)"
            if let xorData = simpleXor(baseData, encryptKey: encrypt_key) {
                return Base64(xorData)
            }
        }
        return nil
    }
    
    
    // urlencode
    fileprivate static func urlEncode(_ data: String?) -> String? {
        if let newData = data {
            let customAllowedSet = CharacterSet(
                charactersIn: "&:=\"#%/<>?@\\^`{|}"
                ).inverted
            return newData.addingPercentEncoding(
                withAllowedCharacters: customAllowedSet
            )
        }
        return nil
    }
    
    // CONV_TIME
    fileprivate static func generateConvTime() -> String {
        return String(Int(Date().timeIntervalSince1970))
    }
    
    //简单异或
    fileprivate static func simpleXor(_ source: String, encryptKey: String) -> Data? {
        var res = [CChar]()
        if let infoArray = source.cString(using: String.Encoding.utf8),
            let keyArray = encryptKey.cString(using: String.Encoding.utf8) {
                var j: Int = 0
                for infoEle in infoArray {
                    res.append(infoEle ^ keyArray[j])
                    j = j + 1
                    j = (j) % (keyArray.count - 1)
                }
//                return Data(bytes: UnsafePointer<UInt8>(res), count: res.count - 1)
            return Data(bytes: UnsafeRawPointer(res), count: res.count - 1)
        }
        return nil
    }
    
    //base64
    fileprivate static func Base64(_ data: Data) -> String? {
        return data.base64EncodedString(
            options: NSData.Base64EncodingOptions(rawValue: 0)
        )
    }
    
    //md5
    fileprivate static func MD5(_ data: String,
        length: Int32 = CC_MD5_DIGEST_LENGTH) -> String {
            let str = data.cString(using: String.Encoding.utf8)
            let strLen = CC_LONG(
                data.lengthOfBytes(using: String.Encoding.utf8)
            )
            let digestLen = Int(length)
//            let result = UnsafeMutablePointer<CUnsignedChar>(allocatingCapacity: digestLen)
            let result = UnsafeMutablePointer<CUnsignedChar>.allocate(capacity: digestLen)
            CC_MD5(str!, strLen, result)
            let hash = NSMutableString()
            for i in 0..<digestLen {
                hash.appendFormat("%02x", result[i])
            }
            result.deallocate(capacity: digestLen)
            return String(hash)
    }
    
    fileprivate static func genMuid() -> String {
        let muid = MD5(DeviceUtils.getIDFA().uppercased())
        return muid
    }
    
}