#import "ViewController.h"

//                  ----WebKitFormBoundaryvMI3CAV0sGUtL8tr

#define Kboundary @"----WebKitFormBoundaryjv0UfA04ED44AhWx"

#define KNewLine [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]

@interface ViewController ()<NSURLSessionDataDelegate>

/** 注释 */

@property (nonatomic, strong) NSURLSession *session;

@end

@implementation ViewController

-(NSURLSession *)session

{

    if (_session == nil) {

        NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];

        //是否运行蜂窝访问

        config.allowsCellularAccess = YES;

        config.timeoutIntervalForRequest = ;

        _session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];

    }

    return _session;

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    [self upload2];

}

-(void)upload

{

    //1.url

    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];

    //2.创建请求对象

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    //2.1 设置请求方法

    request.HTTPMethod = @"POST";

    //2.2 设请求头信息

    [request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",Kboundary] forHTTPHeaderField:@"Content-Type"];

    //3.创建会话对象

//    NSURLSession *session = [NSURLSession sharedSession];

    //4.创建上传TASK

    /*

     第一个参数:请求对象

     第二个参数:传递是要上传的数据(请求体)

     第三个参数:

     */

   NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithRequest:request fromData:[self getBodyData] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

       //6.解析

       NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);

    }];

    //5.执行Task

    [uploadTask resume];

}

-(void)upload2

{

    //1.url

    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];

    //2.创建请求对象

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    //2.1 设置请求方法

    request.HTTPMethod = @"POST";

    //2.2 设请求头信息

    [request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",Kboundary] forHTTPHeaderField:@"Content-Type"];

    //3.创建会话对象

    //4.创建上传TASK

    /*

     第一个参数:请求对象

     第二个参数:传递是要上传的数据(请求体)

     */

    NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithRequest:request fromData:[self getBodyData] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

        //6.解析

        NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);

    }];

    //5.执行Task

    [uploadTask resume];

}

-(NSData *)getBodyData

{

    NSMutableData *fileData = [NSMutableData data];

    //5.1 文件参数

    /*

     --分隔符

     Content-Disposition: form-data; name="file"; filename="Snip20160225_341.png"

     Content-Type: image/png(MIMEType:大类型/小类型)

     空行

     文件参数

     */

    [fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    //name:file 服务器规定的参数

    //filename:Snip20160225_341.png 文件保存到服务器上面的名称

    //Content-Type:文件的类型

    [fileData appendData:[@"Content-Disposition: form-data; name=\"file\"; filename=\"Sss.png\"" dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    [fileData appendData:[@"Content-Type: image/png" dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    [fileData appendData:KNewLine];

    UIImage *image = [UIImage imageNamed:@"Snip20160226_90"];

    //UIImage --->NSData

    NSData *imageData = UIImagePNGRepresentation(image);

    [fileData appendData:imageData];

    [fileData appendData:KNewLine];

    //5.2 非文件参数

    /*

     --分隔符

     Content-Disposition: form-data; name="username"

     空行

     123456

     */

    [fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    [fileData appendData:[@"Content-Disposition: form-data; name=\"username\"" dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    [fileData appendData:KNewLine];

    [fileData appendData:[@"" dataUsingEncoding:NSUTF8StringEncoding]];

    [fileData appendData:KNewLine];

    //5.3 结尾标识

    /*

     --分隔符--

     */

    [fileData appendData:[[NSString stringWithFormat:@"--%@--",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];

    return fileData;

}

#pragma mark ----------------------

#pragma mark NSURLSessionDataDelegate

/*

 *  @param bytesSent                本次发送的数据

 *  @param totalBytesSent           上传完成的数据大小

 *  @param totalBytesExpectedToSend 文件的总大小

 */

-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend

{

    NSLog(@"%f",1.0 *totalBytesSent / totalBytesExpectedToSend);

}

@end