Sending NSData and NSString in the same POST - ios

Question

I am trying to follow this Insert imagedata into MySQL database from XCode using PHP & JSON answer to send a photo from my app to a MySQL database but I am confused as to how to add an NSString ID to reference to the POST body.
We have the following to create the body which gets the image data:
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"image\"; filename=\"imagename.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
How might I send additional information such as a text ID within the same post?

Answer 1

Here is the whole code to post data along with Imagedata and string.
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
[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];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"image\"; filename=\"imagename.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
[dict setObject:#"<YOUR TEXT>" forKey:#"<KEY>"];
[body appendData:[self createFormData:dict withBoundary:boundary]];
[request setHTTPBody:body];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(#"%#", returnString);
- (NSData*)createFormData:(NSDictionary*)myDictionary withBoundary:(NSString*)myBounds
{
NSMutableData *myReturn = [[NSMutableData alloc] init];
NSArray *formKeys = [myDictionary allKeys];
for (int i = 0; i < [formKeys count]; i++) {
[myReturn appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",myBounds] dataUsingEncoding:NSASCIIStringEncoding]];
[myReturn appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"%#\"\r\n\r\n%#",[formKeys objectAtIndex:i],[myDictionary valueForKey:[formKeys objectAtIndex:i]]] dataUsingEncoding:NSASCIIStringEncoding]];
}
return myReturn;
}

Answer 2

I think what you are looking for is setValue:forHTTPHeaderField:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://www.example.com"]];
request.HTTPMethod = #"POST";
request.HTTPBody = body;
[request setValue:#"someValue" forHTTPHeaderField:#"someField"];