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 @"
"
#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