IOS-网络（文件上传）

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

@interface ViewController ()

@end

@implementation ViewController

/*
 一、文件上传的概括
 参数1
 参数2
 结束标记3
 
 --------------------------------------------------------------
 二、文件上传的格式
 
 1.文件参数
 BowenKeJi
 
 Content-Disposition: form-data; name="参数名"; filename="文件名"
 
 Content-Type: 文件类型/MIMEType
 
 
 文件具体数据
 
 2.非文件参数
 BowenKeJi
 
 Content-Disposition: form-data; name="参数名"
 
 
 参数值
 
 3.结束标记
 BowenKeJi--
 
 -------------------------------------------------------------------
 三、文件的MIMEType
 1.百度搜索
 2.apache-tomcat-版本号/conf/web.xml
 3.加载文件时通过Reponse获得
 -------------------------------------------------------------------
 */

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor cyanColor];
    
    NSString *name = @"jack";
    [self test:&name];
    NSLog(@"%@",name);

}

///在方法中更改字符串的值
- (void)test:(NSString **)str
{
    *str = @"bowen";
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    //[self upload];
    
    //文件参数
    NSDictionary *params = @{
                             @"username" : @"bowen"
                             };
    //文件数据
//    UIImage *image = [UIImage imageNamed:@"abc"];
//    NSData *imgData = UIImageJPEGRepresentation(image, 1);
//    [self upload:@"text.png" AndMIMEType:@"image/png" AndfileData:imgData AndParams:params];
    
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"abc" withExtension:@"jpg"];
    NSData *data = [NSData dataWithContentsOfURL:url];
    NSString *MIMEType = [self MIMEType:url];
    [self upload:@"cba.jpg" AndMIMEType:MIMEType AndfileData:data AndParams:params];
    
    
//    NSURL *url1 = [[NSBundle mainBundle] URLForResource:@"abc" withExtension:@"jpg"];
//    //NSURL *url1 = [NSURL fileURLWithPath:@"/Users/apple/Desktop/hehe.text"];
//    NSString *mimeType = [self MIMEType:url1];
//    NSLog(@"%@",mimeType);
    
}

///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;
}

///文件上传未封装
- (void)upload
{
     // 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)];
     
     [body appendData:BWEncode(@"Content-Disposition: form-data; name="file"; filename="ts.jpg"")];
     [body appendData:BWEncode(BWNewLine)];
     
     [body appendData:BWEncode(@"Content-Type: image/jpg")];
     [body appendData:BWEncode(BWNewLine)];
     
     //具体内容
     [body appendData:BWEncode(BWNewLine)];
     UIImage *image = [UIImage imageNamed:@"abc"];
     NSData *imgData = UIImageJPEGRepresentation(image, 1);
     [body appendData:imgData];
     [body appendData:BWEncode(BWNewLine)];
     
     // 4.2非文件参数（用户名参数）
     [body appendData:BWEncode(@"--")];
     [body appendData:BWEncode(BWFileBoundary)];
     [body appendData:BWEncode(BWNewLine)];
     
     [body appendData:BWEncode(@"Content-Disposition: form-data; name="username"")];
     [body appendData:BWEncode(BWNewLine)];
     
     [body appendData:BWEncode(BWNewLine)];
     [body appendData:BWEncode(@"bowen")];
     [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);
     }];
}
     
///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