在 iOS 上使用 SoundCloud API 上传曲目

Question

我必须使用 HTTP 方法将 mp3 文件上传到 SoundCloud。我没有收到任何错误，但该文件没有出现在 SoundCloud 上。

我正在使用multipart/form-data request

这是我目前的处理方式：（我已经完成了连接、授权并且我知道我的用户 ID）。

NSString *url=[NSString stringWithFormat:@"http://api.soundcloud.com/tracks.json?client_id=%@&user_id=%@&title=%@&tag_list=%@&sharing=%@&oauth_token=%@",SOUNDCLOUD_CLIENT_ID, inputData[@"user_id"],inputData[@"title"],inputData[@"tag_list”],inputData[@"sharing”], ACCESS_TOKEN];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];
request.HTTPMethod = @“POST”;

NSString *boundary= @“SoundCloud”;
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:@"\n--%@\n",boundary]dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\”asset_data\"; filename=\"%@\"\n”,@“my file name.mp3"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: audio/mpeg\n\n” dataUsingEncoding:NSUTF8StringEncoding];
NSData *audioData=[NSData dataWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"untitled" ofType:@"mp3”]];
[body appendData:[NSData dataWithData:audioData]];
[body appendData:[[NSString stringWithFormat:@"\n--%@", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

request.HTTPBody = body;

[request setValue:[NSString stringWithFormat:@"%lud",(unsigned long)[body length]] forHTTPHeaderField:@"Content-Length”];
[request addValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@,boundary] forHTTPHeaderField:@"content-Type"];
request.timeoutInterval = 30;
self.connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[self.connection start];

.mp3 文件实际上是我搜​​索的位置，因此“audioData”具有正确的内容。 我收到 200 HTTP 响应代码：

NSHTTPURLResponse:{ URL: https://api.soundcloud.com/tracks.json?client_id=[...]&user_id=[...]&title=dgd&tag_list=wgn&sharing=public&oauth_token=[...] } { status code: 200, headers {

"Access-Control-Allow-Headers" = "Accept, Authorization, Content-Type, Origin";
"Access-Control-Allow-Methods" = "GET, PUT, POST, DELETE";
"Access-Control-Allow-Origin" = "*";
"Access-Control-Expose-Headers" = Date;
"Cache-Control" = "private, max-age=0, must-revalidate";
"Content-Encoding" = gzip;
"Content-Type" = "application/json; charset=utf-8";
Date = "Mon, 08 Dec 2014 15:58:57 GMT";
Etag = "\"66cc86baea454001c9572594b9caeea0\"";
Server = "am/2";
"Set-Cookie" = "_session_auth_key=\"LdrvaLfDKfaGihR714EaihOotlo=\"";
"Transfer-Encoding" = Identity;
} }

然后，响应 json 是一个数组，其中包含我帐户中所有曲目的列表。没有错误，但没有上传文件。模拟器和设备得到相同的响应。 欢迎任何建议。

附：我也尝试过像这样更改正文和内容类型的发布请求，但没有工作结果：

NSDictionary *body=@{@"asset_data":[[NSData dataWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"untitled" ofType:@"mp3"]]base64EncodedStringWithOptions:0]};
NSData *bodyData = [NSJSONSerialization dataWithJSONObject:body options:0 error:&error];
request.HTTPBody = bodyData;
[request addValue:@"application/json" forHTTPHeaderField:@"content-Type"];

Answer 1

我正在做类似的事情，我得到了代码 400，但我还包含了一个访问令牌，我认为你需要它。

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

你有没有得到任何地方？

Answer 2

我现在有了用 NSURLRequest 上传歌曲的工作代码。希望对您有所帮助。

-(void)uploadTrackTitled:(NSString*)title withPath:(NSString*)trackPath {
    NSURLSession* urlSession = [NSURLSession sharedSession];
    NSURLRequest* urlRequest = [self getURLRequest:title withAudioPath:trackPath];

    NSURLSessionDataTask* dataTask = [urlSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
        NSLog(@"returned: %ld", (long)httpResponse.statusCode);

        if(data) {
            NSString* stringResponse = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"%@", stringResponse);
        }

        if(error) {
            NSLog(@"%@", [error localizedDescription]);
        }
    }];

    [dataTask resume];
}

-(NSURLRequest*)getURLRequest:(NSString*)title withAudioPath:(NSString*)audioPath {
    CFUUIDRef uuid = CFUUIDCreate(NULL);
    NSString* boundary = (__bridge_transfer NSString *)CFUUIDCreateString(NULL, uuid);
    CFRelease(uuid);
    NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"https://api.soundcloud.com/tracks"]];

    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:[self getPostData:self.scToken withBoundary:boundary andTitle:title withAudioPath:audioPath]];

    NSString* contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];

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

    return request;
}

-(NSData*)getPostData:(NSString*)token withBoundary:(NSString*)boundary andTitle:(NSString*)title withAudioPath:(NSString*)audioPath {
    NSString* boundaryStart = [NSString stringWithFormat:@"--%@\r\n", boundary];
    NSString* boundaryEnd = [NSString stringWithFormat:@"\r\n--%@--\r\n", boundary];
    NSMutableData* bodyData = [[NSMutableData alloc] init];

    //add the token
    NSMutableString* tokenSection = [NSMutableString stringWithString:boundaryStart];
    [tokenSection appendFormat:@"Content-Disposition: form-data; name=\"oauth_token\"\r\n\r\n"];
    [tokenSection appendFormat:@"%@\r\n", token];
    [bodyData appendData:[tokenSection dataUsingEncoding:NSUTF8StringEncoding]];

    //track title
    NSMutableString* titleSection = [NSMutableString stringWithString:boundaryStart];
    [titleSection appendFormat:@"Content-Disposition: form-data; name=\"track[title]\"\r\n\r\n"];
    [titleSection appendFormat:@"%@\r\n", title];
    [bodyData appendData:[titleSection dataUsingEncoding:NSUTF8StringEncoding]];

    //add the audio file
    NSData* trackData = [NSData dataWithContentsOfFile:audioPath];
    NSMutableString* trackSection = [NSMutableString stringWithString:boundaryStart];
    [trackSection appendFormat:@"Content-Disposition: form-data; name=\"track[asset_data]\"; "];
    [trackSection appendFormat:@"filename=\"%@\"\r\n", [audioPath lastPathComponent]];
    [trackSection appendFormat:@"Content-Type: application/octet-stream\r\n\r\n"];

    [bodyData appendData:[trackSection dataUsingEncoding:NSUTF8StringEncoding]];
    [bodyData appendData:trackData];

    //ending
    [bodyData appendData:[boundaryEnd dataUsingEncoding:NSUTF8StringEncoding]];

    return bodyData;
}