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I am trying to upload a image on my server but its always returning "FILE OBJECT is NUll" means its not receiving the image I am trying to send

I have to upload a image against the input key "file" along-with 2 text parameters "textParam1" and "textParam2"

I am not getting where i am wrong, here is my code: 

    NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"Default.png"], 90);

// setting up the URL to post to
NSString *urlString = @"http://172.16.16.209:8080/xyz/upload.htm";
NSString *textParam1 = @"10";
NSString *textParam2 = @"ABCDEFGHIGH";

// setting up the request object now
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

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


NSMutableData *body = [NSMutableData data];

// file
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: attachment; name=\"testImage\"; filename=\"Default.png\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

// text parameter 1
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"textParam1\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[textParam1 dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

// text parameter 2
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"textParam2\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[textParam2 dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

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

// set request body
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"returnString: %@",returnString);

where to pass the parameter "file" against the image to be uploaded.

the url is running on local eclipse and not accessible outside, but service is working fine in case of android.

K..
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  • NSString *urlString = @"http://172.16.16.209:8080/xyz/upload.htm"; Bind your parameters in the urlString like this NSString *urlString2 = [NSString stringWithFormat:@"%@?file=%@&parameter1=%@&parameter2=%@",urlString,parameter1,parameter2]; – SRI Sep 18 '13 at 10:11
  • Checkout `AFNetworking` framework. There are many convenience methods for uses like this: https://github.com/AFNetworking/AFNetworking. – czechboy Sep 18 '13 at 10:17
  • I have posted answer for it before some time to upload file/image to server. [Find Post here](http://stackoverflow.com/questions/11084403/uploading-image-via-post-in-objective-c/15477035#15477035) – Dipen Panchasara Sep 19 '13 at 10:46

1 Answers1

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You should take a look at ASI frameworks http://allseeing-i.com/ASIHTTPRequest/

Surya Subenthiran
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