Send a text message using the Twilio service.

send-twilio.m

- ( void ) sendTwilioTextMessage : ( NSString * ) toNumber withBody : ( NSString * ) body
{
    NSArray * items;
    NSData * post;
    NSError * error;
    NSHTTPURLResponse * response;
    NSMutableURLRequest * request;
    NSString * contents;
    NSXMLDocument * doc;
    
    // Message details
    contents = [[NSString alloc] initWithFormat:@"From=_TWILIO_PHONE_NUMBER_&To=%@&Body=%@", toNumber, body];
    
    // Send form data
    request = [[NSMutableURLRequest alloc] init];
    [request setURL : [NSURL URLWithString : @"https://_ACCOUNT_SID_:_ACCOUNT_AUTH_TOKEN_@api.twilio.com/2010-04-01/Accounts/_ACCOUNT_SID_/SMS/Messages"]];
    [request setHTTPMethod : @"POST"];
    [request setValue : [NSString stringWithFormat : @"%lu", [contents length]] forHTTPHeaderField : @"Content-Length"];
    [request setValue : @"application/x-www-form-urlencoded" forHTTPHeaderField : @"Content-Type"];
    [request setHTTPBody : [contents dataUsingEncoding : NSUTF8StringEncoding]];
    
    error = [[NSError alloc] init];
    
    response = nil;
    
    post = [NSURLConnection sendSynchronousRequest : request returningResponse : &response error : &error];
    
    doc = [[NSXMLDocument alloc] initWithData : post options : ( NSXMLNodePreserveWhitespace | NSXMLNodePreserveCDATA ) error : &error];
    items = [doc nodesForXPath:@"//DateCreated" error : &error];
    
    NSLog( @"%@", [[items objectAtIndex:0] objectValue] );
}