Sending file to server iOS with two parameters iOS

问题:

I want to send file to server path with a paramater "filepath" as one parameter, and file data as another paramater. How do I do it.Here in the following I am appending filepath with data. but I guess it is wrong please help

NSURL *nsurl =[NSURL URLWithString:_urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:nsurl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
[request setURL:nsurl];
[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];
NSData *data = UIImageJPEGRepresentation([UIImage imageNamed:@"Model.png"],  0.0);
NSString *string = [NSString stringWithFormat:@"filepath=%@",_filePath];

NSData *pathData = [string dataUsingEncoding:NSUTF8StringEncoding];
[body appendData:pathData];

//Image
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"image\"; filename=\"%@\"\r\n",@"newFile.png"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:data];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// setting the body of the post to the reqeust
[request setHTTPBody:body];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:returnData options:kNilOptions error:nil];
NSLog(@"%@",dict);

thanks

回答1:

You can't just do [body appendData:pathData]; at the start. You need to add it with the appropriate boundary and content information. So you should have a number of lines like:

1. Add the boundary
2. Add the content info
3. Add the content data
4. Add the boundary

And repeat from 2 for each additional piece of data to be added.

Check the spec for information on the appropriate content types and disposition info that needs to be added for each data type (perfect example for you is at the bottom).