IOS Send file (images) to web server using POST method

-(NSMutableData *)generateDataFromText:(NSString *)dataText fieldName:(NSString *)fieldName{

NSString *post = [NSString stringWithFormat:@"--AaB03x\r\nContent-Disposition: form-data; name=\"%@\"\r\n\r\n", fieldName];

    // Get the post header int ASCII format:

    NSData *postHeaderData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

    

    // Generate the mutable data variable:

    NSMutableData *postData = [[NSMutableData alloc] initWithLength:[postHeaderData length] ];

    [postData setData:postHeaderData];

    

NSData *uploadData = [dataText dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

    // Add the text:

    [postData appendData: uploadData];

    

    // Add the closing boundry:

    [postData appendData: [@"\r\n" dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]];

    

    // Return the post data:

    return postData;

}

- (NSData *)generatePostDataForData:(NSData *)uploadData fileName:(NSString *)fileName

{

    // Generate the post header:

    NSString *post = [NSString stringWithFormat:@"--AaB03x\r\nContent-Disposition: form-data; name=\"attachment\"; filename=\"%@\"\r\nContent-Type: video/3gpp\r\n\r\n", fileName];

    

    // Get the post header int ASCII format:

    NSData *postHeaderData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

    

    // Generate the mutable data variable:

    NSMutableData *postData = [[NSMutableData alloc] initWithLength:[postHeaderData length] ];

    [postData setData:postHeaderData];

    

    // Add the image:

    [postData appendData: uploadData];

    

    // Add the closing boundry:

    [postData appendData: [@"\r\n--AaB03x--" dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]];

    

    // Return the post data:

    return postData;

}

////////////////////////////////////////////////////

-(void)sendDataToServer {

//Prepare data for file

NSData *dataObj = [NSData dataWithContentsOfFile:@"/link/to/file"];

[postData appendData:[self generatePostDataForData:dataObj fileName:@"fileName"]];

// Setup the request:

NSMutableURLRequest *uploadRequest = [[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:kLinkToPostFile] cachePolicy: NSURLRequestReloadIgnoringLocalCacheData timeoutInterval: 30 ] autorelease];

[uploadRequest setHTTPMethod:@"POST"];

[uploadRequest setValue:[NSString stringWithFormat:@"%d", [postData length]] forHTTPHeaderField:@"Content-Length"];

[uploadRequest setValue:@"multipart/form-data; boundary=AaB03x" forHTTPHeaderField:@"Content-Type"];

[uploadRequest setHTTPBody: postData];

NSData *responseData = [NSURLConnection sendSynchronousRequest:uploadRequest returningResponse:nil error:nil];

NSLog([[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding]);

}