IOS-网络（文件压缩和解压缩）

 //
 //  ViewController.m
 //  IOS_0206_文件上传
 //
 //  Created by ma c on 16/2/6.
 //  Copyright © 2016年 博文科技. All rights reserved.
 //

 #import "ViewController.h"
 #import "SSZipArchive.h"

 #define BWFileBoundary @"----------BowenKeJi"
 #define BWNewLine @"\r\n"
 #define BWEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding]

 @interface ViewController ()

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = [UIColor cyanColor];
 }

 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     [self createZip];
 }
 ///压缩文件
 - (void)createZip
 {
     NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
     //0.需要压缩的文件夹
     NSString *images = [caches stringByAppendingPathComponent:@"images"];
     //1.创建一个zip文件
     NSString *zipFile = [caches stringByAppendingPathComponent:@"images.zip"];
     BOOL result = [SSZipArchive createZipFileAtPath:zipFile withContentsOfDirectory:images];

     if (result) {
         NSString *MIMEType = [self MIMEType:[NSURL fileURLWithPath:zipFile]];
         NSData *data = [NSData dataWithContentsOfFile:zipFile];
         [self upload:@"images.zip" AndMIMEType:MIMEType AndfileData:data AndParams:nil];
     }

 }
 ///解压缩文件
 - (void)unZip
 {
     NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/resources/images.zip"];
     NSURLSessionDownloadTask *task = [[NSURLSession sharedSession] downloadTaskWithURL:url completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {

         NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
         [SSZipArchive unzipFileAtPath:location.path toDestination:caches uniqueId:nil];

     }];
     [task resume];
 }

 ///文件的MIMEType
 - (NSString *)MIMEType:(NSURL *)url
 {
     //1.创建一个请求
     NSURLRequest *request = [NSURLRequest requestWithURL:url];

     NSURLResponse *response = nil;
     //2.发送请求（返回响应）
     [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
     //3.获得MIMEType
     return response.MIMEType;
 }

 ///文件上传封装
 - (void)upload:(NSString *)filename AndMIMEType:(NSString *)mimeType AndfileData:(NSData *)fileData
    AndParams:(NSDictionary *)dict
 {
     // 1.请求路径
     NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/upload"];
     // 2.创建一个POST请求
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
     request.HTTPMethod = @"POST";
     // 2.设置请求头（告诉服务器这次上传的是文件数据）
     NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",BWFileBoundary];
     [request setValue:contentType forHTTPHeaderField:@"Content-Type"];
     // 3.设置请求体
     NSMutableData *body = [NSMutableData data];

     // 4.1文件参数
     [body appendData:BWEncode(@"--")];
     [body appendData:BWEncode(BWFileBoundary)];
     [body appendData:BWEncode(BWNewLine)];
     NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"",filename];
     [body appendData:BWEncode(disposition)];
     [body appendData:BWEncode(BWNewLine)];

     NSString *type = [NSString stringWithFormat:@"Content-Type: %@",mimeType];
     [body appendData:BWEncode(type)];
     [body appendData:BWEncode(BWNewLine)];

     //具体内容
     [body appendData:BWEncode(BWNewLine)];
     [body appendData:fileData];
     [body appendData:BWEncode(BWNewLine)];

     // 4.2非文件参数（用户名参数）

     [dict enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
         [body appendData:BWEncode(@"--")];
         [body appendData:BWEncode(BWFileBoundary)];
         [body appendData:BWEncode(BWNewLine)];

         NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"",key];

         [body appendData:BWEncode(disposition)];
         [body appendData:BWEncode(BWNewLine)];

         [body appendData:BWEncode(BWNewLine)];
         [body appendData:BWEncode([obj description])];
         [body appendData:BWEncode(BWNewLine)];

     }];
     // 4.3结束标记
     [body appendData:BWEncode(@"--")];
     [body appendData:BWEncode(BWFileBoundary)];
     [body appendData:BWEncode(@"--")];
     [body appendData:BWEncode(BWNewLine)];

     request.HTTPBody = body;

     // 5.发送请求
     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

         NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
         NSLog(@"%@",dict);
     }];
 }

 @end