//
//  SBTHttpTool.swift
//  SolarBT
//
//  Created by weclouds on 2019/8/9.
//  Copyright © 2019 weclouds. All rights reserved.
//

import UIKit
import MobileCoreServices
class SBTHttpTool: NSObject {
   internal static let shareInstance = SBTHttpTool()
    //   open func dataTask(with url: URL, completionHandler: @escaping (Data?, URLResponse?, Error?) -> Void) -> URLSessionDataTask
    func startUpload(_ url:String, parmeters : Data,successHandler:@escaping ((String)->Void),failureHandler:@escaping ((Error?) ->Void) ){
        //上传地址
        let postUrl = URL(string: url)
        var request = URLRequest(url: postUrl!)
        //请求类型
        request.httpMethod = "POST"
        request.setValue("multipart/form-data", forHTTPHeaderField: "Content-Type")
        //创建表单body
        request.httpBody =  parmeters
        
        //创建一个表单上传任务
        let session = URLSession.shared
        let uploadTask = session.dataTask(with: request) { (data, response, error) in
            
            if error != nil{
                log.debug(error)
                failureHandler(error)
            }else{
                let str = String(data: data!, encoding: .utf8)
                log.debug("---上传完毕--\(str!)")
                successHandler(str!)
            }
        }
        
        //使用resume方法启动任务
        uploadTask.resume()
    }
    
//    //创建表单body
//    func createBody(with parameters : [String:Any]) -> Data {
//        var body = Data()
//        //添加参数数据
//        for (key,value) in parameters {
//            body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
//            body.append("\(value)\r\n")
//        }
//        return body
//    }
    
    //根据后缀获取对应的Mine-Type
    func mimeType(pathExtension:String) -> String {
        if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension,
                                                           pathExtension as NSString,
                                                           nil)?.takeRetainedValue() {
            if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?
                .takeRetainedValue() {
                return mimetype as String
            }
        }
        //文件资源类型如果不知道，传万能类型application/octet-stream，服务器会自动解析文件类
        return "application/octet-stream"
    }
}

extension Data{
    ///增加直接添加String数据的方法
    mutating  func append(_ string :String,using encoding:String.Encoding = .utf8)  {
        if let data = string.data(using: encoding) {
            append(data)
        }
    }
}