cURL以NSMutableURLRequest格式上传照片命令(cURL upload photo command in NSMutableURLRequest format)

 我知道这看起来可能与手头的问题有关，但是，这是我试图避免可怕的上传包含大量（而且过时）数量依赖的可可豆荚的上传使用，以便上传文件（然后下载它）在以后的日子）。 
 
 我正在努力翻译cURL命令中的'-F'选项。 我知道他们指定HTTP多部分POST数据，但是将其转换为附加图片文件的NSMutableData很困难。 我一直收到403状态代码。 
 
 cURL命令是： 
 
curl -F "UPLOADCARE_PUB_KEY=e84a031b3da1g560d56d"  \
-F "UPLOADCARE_STORE=1"  \
-F "file=@aaronmillman.jpg" https://upload.uploadcare.com/base/
 
 我目前的尝试是： 
 
NSMutableData *body = [NSMutableData data];
NSData *imageData = UIImageJPEGRepresentation(image, 0.6);
if (imageData) {
    [body appendData:[@"UPLOADCARE_PUB_KEY=e84a031b3da1g560d56d" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"UPLOADCARE_STORE=1" dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"file="] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:imageData];
}

NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];

NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];

NSURL *url = [NSURL URLWithString:baseUrl];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = imageData;
NSURLSessionDataTask *uploadTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSLog(@"%@",response);
}];
[uploadTask resume];
 
 我对NSMutableData做错了什么？ 
 
 第二个相关问题是：是否值得使用Objective-C lib curl包装器？ 

I know this may seem specific to the issue at hand, however, this is me trying to avoid the horrible UploadCare usage of cocoa pods which contains a significant (and rather outdated) amount of dependencies, to JUST upload a file (and subsequently download it at a later date).
 
I'm struggling to translate the '-F' options in the cURL command. I understand that they specify HTTP multipart POST data, but converting this into NSMutableData with the picture file attached is difficult. I keep receiving a 403 status code.
 
The cURL command is:
 
curl -F "UPLOADCARE_PUB_KEY=e84a031b3da1g560d56d"  \
-F "UPLOADCARE_STORE=1"  \
-F "file=@aaronmillman.jpg" https://upload.uploadcare.com/base/
 
My current attempt is:
 
NSMutableData *body = [NSMutableData data];
NSData *imageData = UIImageJPEGRepresentation(image, 0.6);
if (imageData) {
    [body appendData:[@"UPLOADCARE_PUB_KEY=e84a031b3da1g560d56d" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"UPLOADCARE_STORE=1" dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"file="] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:imageData];
}

NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];

NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];

NSURL *url = [NSURL URLWithString:baseUrl];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = imageData;
NSURLSessionDataTask *uploadTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSLog(@"%@",response);
}];
[uploadTask resume];
 
What am I doing wrong with the NSMutableData?
 
A second, and related question is: Is it worth using an objective-C lib curl wrapper at all?

原文：https://stackoverflow.com/questions/25597370