objective-c - Doesn't upload file's content - iphone

Question

I want to upload a local word (or rtf) file to my server. Uploads the file without content. There is no error code or anything..
NSString *urlString = #"http://myserver.com/upload-c.php";
NSString *filename=#"xx.docx";
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:#"xx.docx"]];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"%#\"\r\n",filename]] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:data]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding] autorelease];
NSLog(#"%#",returnString);

Answer 1

One obvious problem is with how you initialize your data variable.
Assuming "xx.docx" is the file you wish to upload, you have two problems.
You need to specify the full path to the file, not just the filename.
Since you are creating an NSURL from a file path, you need to use fileURLWithPath:, not URLWithString:.
Edit: Based on your comments, the file is located in the app's resource bundle. To get its fullpath you should do this:
NSString *fullPath = [[NSBundle mainBundle] pathForResource:#"xx" ofType:#"docx"];
NSData *data = [NSData dataWithContentsOfFile:fullPath];
Also, this line:
[body appendData:[NSData dataWithData:data]];
should simply be:
[body appendData:data];
And get rid of the calls to stringWithString:. Example:
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
should be:
[body appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
and:
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
should be:
NSString *boundary = #"---------------------------14737809831466499882746641449";