iphone – 如何通过http发送音频文件从ios发送到服务器？

这是我用来发布到服务器的以下代码

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"recordedTmpFile" ofType:@"caf"];
 NSURL *file =[[NSURL alloc] initFileURLWithPath:filePath];
 NSString *filepath = [[NSBundle mainBundle]  initWithContentsOfURL:recordedTmpFile];
 NSData *postData = [NSData dataWithContentsOfFile:filePath];

// nsdata到string

NSString* newStr = [NSString stringWithUTF8String:[postData  bytes]];

// http帖子

NSMutableString *jsonRequest = [[NSMutableString alloc]init];
[jsonRequest appendString:newStr];
NSURL *url = [NSURL URLWithString:@"http address"];


NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
NSData *requestData = [NSData dataWithBytes:[jsonRequest UTF8String] length:[jsonRequest length]];

[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d",[requestData length]] forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody: requestData];

[NSURLConnection connectionWithRequest:[request autorelease] delegate:self];