AFNetworking 2 - Image upload - Request failed: unsupported media type (415)

I know this question was answered multiple times, but I tried all the answers with no luck. I don't think that I do something fundamentally wrong but something goes definitely wrong here.

我知道这个问题已经回答了很多次了，但是我试了所有的答案都没有运气。我不认为我做了什么根本错误的事，但这里肯定出了问题。

I use the following code to upload PNG files to tinypng.com. As far as I can see the upload itself works, but I receive the error message: Request failed: unsupported media type (415)

我使用下面的代码将PNG文件上传到tinypng.com。就我所见，上传本身是有效的，但是我收到了错误消息:请求失败:不支持的媒体类型(415)

The images I use are loaded as JPEG, then resized and transformed to PNG format. The saved files are fine. Now I want send them to the TinyPNG API before I save them to disc.

我使用的图像被加载为JPEG，然后调整大小并转换为PNG格式。保存的文件没有问题。现在我想把它们发送到TinyPNG API，然后再将它们保存到磁盘。

If anyone has an idea whats wrong or has experience with that service, please let me know. Thanks in advance!

如果有人知道哪里出了问题，或者有服务经验，请告诉我。提前谢谢!

Detailed error message

详细错误信息

Error Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: unsupported media type (415)" 
UserInfo=0x6000000e4900 {
    com.alamofire.serialization.response.error.response=<NSHTTPURLResponse: 0x600000220200> { URL: https://api.tinypng.com/shrink } 
    { 
        status code: 415, headers {
            Connection = "keep-alive";
            "Content-Length" = 77;
            "Content-Type" = "application/json; charset=utf-8";
            Date = "Tue, 16 Dec 2014 20:24:16 GMT";
            Server = "Apache/2";
            "Strict-Transport-Security" = "max-age=31536000";
            "X-Powered-By" = "Voormedia (voormedia.com/jobs)";
        } 
    }, 
    NSErrorFailingURLKey=https://api.tinypng.com/shrink,
    com.alamofire.serialization.response.error.data=<7b226572 726f7222 3a224261 64536967 6e617475 
    7265222c 226d6573 73616765 223a2244 6f657320 6e6f7420 61707065 61722074 6f206265 20612050 
    4e47206f 72204a50 45472066 696c6522 7d>, 
    NSLocalizedDescription=Request failed: unsupported media type (415)
}

The code I use

我使用的代码

-(void) uploadImage:(NSImage *)image {

    AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:TINY_PNG_URL]];

    CGImageRef cgRef = [image CGImageForProposedRect:NULL
                                             context:nil
                                               hints:nil];
    NSBitmapImageRep *newRep = [[NSBitmapImageRep alloc] initWithCGImage:cgRef];
    [newRep setSize:[image size]];   // if you want the same resolution
    NSData *imageData = [newRep representationUsingType:NSPNGFileType properties:nil];

    NSDictionary *parameters = @{@"username": USERNAME, @"password" : PASSWORD};

    AFHTTPRequestOperation *operation = [manager POST:@"" parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        //append image
        [formData appendPartWithFileData:imageData
                                    name:@"filename"
                                fileName:@"photo.png"
                                mimeType:@"image/png"];

    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Success: %@ ***** %@", operation.responseString, responseObject);

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@ ***** %@", operation.responseString, error);
    }];

    [operation start];
}

1 个解决方案

#1

With the support of Mattijs from TinyPNG I've got it working! Thanks Mattijs!

在TinyPNG的Mattijs支持下，我让它工作了!谢谢Mattijs !

The problem was, that the TinyPNG API expects the request body to only be the image data, which isn't the case with the multipart form data body I used in my original code.

问题是，TinyPNG API期望请求主体仅仅是图像数据，而不是我在原始代码中使用的多部分表单数据体的情况。

My working solution is:

我的工作的解决方案是:

-(void) uploadImage:(NSImage *)image {

    NSData *imageData = [self PNGRepresentationOfImage:image];

    NSURL *url = [NSURL URLWithString:TINY_PNG_URL];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:imageData];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"image/png" forHTTPHeaderField:@"Content-Type"];

    NSString *authStr = [NSString stringWithFormat:@"%@:%@", USERNAME, PASSWORD];
    NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];
    NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed]];
    [request setValue:authValue forHTTPHeaderField:@"Authorization"];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    operation.responseSerializer = [AFJSONResponseSerializer serializer];
    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id result) {
        NSLog(@"Success: %@ ***** %@", operation.responseString, result);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@ ***** %@", operation.responseString, error);
    }];
    [operation start];
}

#1