IOS-网络编程(上传任务到微博)

2.jpg

  @end

  @implementation ViewController

  - (void)viewDidLoad {
[super viewDidLoad];

//1 url
NSURL *url = [NSURL URLWithString:@"https://upload.api.weibo.com/2/statuses/upload.json"];

//2 request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//(1)请求方式
[request setHTTPMethod:@"POST"];

//(2)请求头
//上传任务,必须要添加的字段
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; charset=utf-8;boundary=%@",boundary];

[request setValue:contentType forHTTPHeaderField:@"Content-Type"];

//(3)请求体
NSString *path = [[NSBundle mainBundle]pathForResource:@"2" ofType:@"jpg"];

NSData *bodydata = [self buildBodyDataWithStatus:@"62班都在睡觉" withPicPath:path];

//    [request setHTTPBody:bodydata];

//3 session
NSURLSession *session = [NSURLSession sharedSession];

//4 task
/*
 Request:请求对象
 fromData:请求体
 */
NSURLSessionUploadTask *task = [session uploadTaskWithRequest:request fromData:bodydata completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {      
    NSLog(@"response = %@",response);     
}];

//5 resume
[task resume];  

}
-(NSData)buildBodyDataWithStatus:(NSString)text withPicPath:(NSString *)path{

//
NSMutableString *bodyStr = [NSMutableString string];

//1 access_token
[bodyStr appendFormat:@"--%@\r\n",boundary];//\n:换行 \n:切换到行首
[bodyStr appendFormat:@"Content-Disposition: form-data; name=\"access_token\""];
[bodyStr appendFormat:@"\r\n\r\n"];
[bodyStr appendFormat:@"%@\r\n",Access_Token];

//2 stutas
[bodyStr appendFormat:@"--%@\r\n",boundary];//\n:换行 \n:切换到行首
[bodyStr appendFormat:@"Content-Disposition: form-data; name=\"status\""];
[bodyStr appendFormat:@"\r\n\r\n"];
[bodyStr appendFormat:@"%@\r\n",text];

//3 pic
/*
 --AaB03x
 Content-disposition: form-data; name="pic"; filename="file"
 Content-Type: application/octet-stream
 */
[bodyStr appendFormat:@"--%@\r\n",boundary];
[bodyStr appendFormat:@"Content-disposition: form-data; name=\"pic\"; filename=\"file\""];
[bodyStr appendFormat:@"\r\n"];
[bodyStr appendFormat:@"Content-Type: application/octet-stream"];
[bodyStr appendFormat:@"\r\n\r\n"];


NSMutableData *bodyData = [NSMutableData data];

//(1)startData
NSData *startData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[bodyData appendData:startData];

//(2)pic
NSData *picdata  =[NSData dataWithContentsOfFile:path];
[bodyData appendData:picdata];

//(3)--Str--
NSString *endStr = [NSString stringWithFormat:@"\r\n--%@--\r\n",boundary];
NSData *endData = [endStr dataUsingEncoding:NSUTF8StringEncoding];
[bodyData appendData:endData];    
return bodyData; 
}
@end