如何将音频，图像和字符串数据一起发布到ios7中的服务器上

Question

NSMutableURLRequest *request= [[NSMutableURLRequest alloc] init];


/////// for image

NSString *filename = @"duck1.jpeg";

NSData *user_post_image = UIImageJPEGRepresentation([UIImage imageNamed:@"duck1.jpeg"], 0.5);

[request setURL:[NSURL URLWithString:combineDocUrl]];
[request setHTTPMethod:@"POST"];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *postbody = [NSMutableData data];

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"user_post_image\"; filename=\"%@.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:user_post_image]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];


////////// for original audio data

//NSString *contentType1 = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
//[request addValue:contentType1 forHTTPHeaderField: @"Content-Type"];


NSString * user_original_post_audiopath = [[NSBundle mainBundle] pathForResource:@"inputRecordedFile" ofType: @"wav"];

NSData *user_original_post_audio = [NSData dataWithContentsOfFile:user_original_post_audiopath];

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"user_original_post_audio\"; filename=\"%@\"\r\n", user_original_post_audiopath] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:user_original_post_audio]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];


////////// for user post audio data

// NSString * contentType2 = [NSString stringWithFormat：@“ multipart / form-data; boundary =％@”，boundary]; // [请求HTTPHeaderField的addValue：contentType2：@“ Content-Type”]；

NSString * user_post_audiopath = [[NSBundle mainBundle] pathForResource:@"convertedWavFile_DonaldDuck" ofType: @"wav"];

NSData *user_post_audio= [NSData dataWithContentsOfFile:user_post_audiopath];

[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"user_post_audio\"; filename=\"%@\"\r\n", user_original_post_audiopath] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:user_post_audio]];
[postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];


//////// for string data

//Append userid
[postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"user_id\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"%@\r\n", userID] dataUsingEncoding:NSUTF8StringEncoding]];


//Append post text
[postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"post_text\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"%@\r\n", postStringText] dataUsingEncoding:NSUTF8StringEncoding]];

//Append filtername
[postbody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"filter_name\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:@"%@\r\n", filterName] dataUsingEncoding:NSUTF8StringEncoding]];


[request setHTTPBody:postbody];

NSData *jsonData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

if (jsonData) {

    NSString *str = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    NSLog(@"str: %@", str);
    // Parse the retrieved JSON to an NSArray
    NSError* e;

    NSDictionary* JSON =
    [NSJSONSerialization JSONObjectWithData: jsonData
                                    options: NSJSONReadingMutableContainers error: &e];

    NSArray *jsonArray = [JSON allKeys];

    for (NSString *key in jsonArray) {
        NSLog(@"%@ : %@",key, [JSON objectForKey:key]);

    }
}

我想将2个音频文件，1个图像和3个字符串值发布到服务器，我们的服务器使用json请求-响应格式，并请求将其作为多部分表单数据发送。 因此我对此感到困惑。 我发送了简单的字符串数据，但并不清楚如何将图像和音频数据一起发送。 因此，这是我尝试发送所有此类参数的代码，但是服务器用一些html文件文本响应了我。 没有错在哪里。 请提出一些建议以找出此代码中的错误。