Objective c NSMutableURLRequest格式的cURL upload photo命令

我知道这可能是手头的问题所特有的，但是，这是我试图避免使用可怕的UploadCare，因为它包含大量（而且已经过时）的依赖项，只是上传一个文件（然后在以后下载）

我正在努力转换cURL命令中的“-F”选项。我知道他们指定了HTTP多部分POST数据，但很难将其转换为附带图片文件的NSMutableData。我一直收到403状态码

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];

NSMutableData有什么问题

第二个相关的问题是：是否值得使用objective-C库卷曲包装器

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"https://upload.uploadcare.com/base/"]];

    UIImage *image = [UIImage imageNamed:@"image.jpg"];
    NSData *imageData = UIImageJPEGRepresentation(image, 1.0);

    [request setHTTPMethod:@"POST"];

    NSString *boundary = @"unique-consistent-string";

    // set Content-Type in HTTP header
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

    // post body
    NSMutableData *body = [NSMutableData data];

    // add params (all params are strings)
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=%@\r\n\r\n", @"UPLOADCARE_PUB_KEY"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@\r\n", @"demopublickey"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=%@\r\n\r\n", @"UPLOADCARE_STORE"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@\r\n", @"1"] dataUsingEncoding:NSUTF8StringEncoding]];

    // add image data
    if (imageData) {
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=file; filename=image.jpg\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    }

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // setting the body of the post to the reqeust
    [request setHTTPBody:body];

    // set the content-length
    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    [NSURLConnection sendAsynchronousRequest:request
                                       queue:[NSOperationQueue currentQueue]
                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {

                               if (data.length > 0) {
                                   NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
                               }
    }];

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您是否正在实现（void）URLSession:（NSURLSession*）session didReceiveChallenge:方法？403可能与此相关。如中所示，我不应该调用该委托方法？我运行的唯一代码就是我在这里发布的代码（我想没有必要在委托调用中引用self）：我不太确定我应该用这个委托方法做什么，但是，不管怎样，当我现在刚刚添加它时，它似乎什么都没有做。嗨，Rusik，当autostore关闭且UPLOADCARE_STORE==1时，当我使用此选项时，它会给我一个403：当autostore关闭时，我如何在服务器上存储文件？autostore-是上载期间存储文件的选项。您需要在项目设置中允许自动存储才能使其正常工作。常规存储请求REST API，可在上传后24小时内完成：