UploadTask-04-网络上传任务

//
//  ViewController.m
//  04-UploadTask
//
#import "ViewController.h"

#define Boundary @"AaB03x"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
/*
 HTTP请求头：
 ....
 multipart/form-data; charset=utf-8;boundary=AaB03x
 ....
 
 HTTP请求体：
 --AaB03x
 Content-Disposition: form-data; name="key1"
 
 value1
 --AaB03x
 Content-disposition: form-data; name="key2"
 
 value2
 --AaB03x
 Content-disposition: form-data; name="key3"; filename="file"
 Content-Type: application/octet-stream
 
 图片数据...
 --AaB03x--
2.00hd363CtKpsnBedca9b3f35tBYiPD
 */
- (NSData *)buildBodyData:(NSData *)imgData {
    
    NSString *accessToken = @"2.00hd363CtKpsnBedca9b3f35tBYiPD";
    NSString *statusValue = @"我发美女图片";
    
    //1.设置status
    NSMutableString *bodyStr = [NSMutableString string];
    [bodyStr appendFormat:@"--%@
", Boundary];
    
    [bodyStr appendFormat:@"Content-Disposition: form-data; name="status"

"];
    [bodyStr appendFormat:@"%@
", statusValue];
    
    //2.设置accessToken
    [bodyStr appendFormat:@"--%@
", Boundary];
    
    [bodyStr appendFormat:@"Content-Disposition: form-data; name="access_token"

"];
    [bodyStr appendFormat:@"%@
", accessToken];
    
    //3.设置Image
    [bodyStr appendFormat:@"--%@
", Boundary];
    
    [bodyStr appendFormat:@"Content-Disposition: form-data; name="pic"; filename="1.jpg"
Content-Type: application/octet-stream

"];
    
    NSMutableData *totalData = [NSMutableData data];
    NSData *textData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
    
    //拼前面所有字符串
    [totalData appendData:textData];
    
    //拼图片数据
    [totalData appendData:imgData];
    
    NSString *endBoundary = [NSString stringWithFormat:@"
--%@--
", Boundary];
    
    [totalData appendData:[endBoundary dataUsingEncoding:NSUTF8StringEncoding]];
    
    return totalData;
    
    
}



- (IBAction)uploadAction:(id)sender {
    
    NSURL *url = [NSURL URLWithString:@"https://upload.api.weibo.com/2/statuses/upload.json"];
    
    //构造request
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    request.HTTPMethod = @"POST";
    request.URL = url;
    request.timeoutInterval = 60;
    
    //设置请求头
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; charset=utf-8;boundary=%@", Boundary];
    [request setValue:contentType forHTTPHeaderField:@"Content-Type"];
    
    //图片数据
    NSString *imgPath = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"jpg"];
    NSData *imgData = [NSData dataWithContentsOfFile:imgPath];
    
    NSData *uploadData = [self buildBodyData:imgData];
    
    NSURLSession *session = [NSURLSession sharedSession];
    
    NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromData:uploadData completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        NSLog(@"response:%@", response);
        
        
        
    }];
    
    [uploadTask resume];
    
    
    
}
@end