Question

I’m trying to build an objective C app which posts data to a remote database using ASIHTTPRequest. Currently, I am using MAMP Server and am struggling to get it to work. The php file works when run online, but I am having trouble getting the iphone app to post data to the php file. HEre is my code:

dbconnect.h

#import <Foundation/Foundation.h>


@interface dbconnect : NSObject {

}

-(void) postToDB:(NSString*) msg;

@end

dbconnect.m

#import "dbconnect.h"
#import "ASIFormDataRequest.h"

@implementation dbconnect

-(void) postToDB:(NSString*) msg{
    NSString *myphp = @"/Applications/MAMP/htdocs/databases/test.php";
    NSURL *url = [NSURL URLWithString:myphp];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    [request setPostValue:msg forKey:@"message"];
}

@end

main

#import <UIKit/UIKit.h>
#import "dbconnect.h"

int main(int argc, char *argv[]) {
    dbconnect* dbc;
    dbc = [[dbconnect alloc]init];
    [dbc postToDB:@"TESTING"];
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];    
    int retVal = UIApplicationMain(argc, argv, nil, nil);       
    [pool release]; 
    return retVal;
}

php

<?php

//connect to database
function connect() {
  $dbh = mysql_connect ("localhost", "root", "root") or die ('I cannot connect to the database because: ' . mysql_error());
  mysql_select_db("testers", $dbh); 
  return $dbh;
}

//store posted data
if(isset($_POST['message'])){
  $message = $_POST['message'];
  $dbh = connect();
  $query = "INSERT INTO  messages (message) VALUES ('$message')";
  $result = mysql_query( $query ) or die ("didn't query");  
}
?>

Now I know it is bad practise to change the main method, but I just wanted to build a quick and dirty iphone/php dummy connection to get it working and the main method was the easiest option. Of course in the real app, I will use a view to trigger such actions…

My code compiles and there are no errors, iOSSimulator loads up..but nothing gets posted to my database…

EDIT:

Sorry I did add that but I copied my old version over. It still doesn’t work even when using an asynchronous request, below is the current version of the postToDB function:

@implementation dbconnect

-(void) postToDB:(NSString*) msg{
    NSString *myphp = @"/Applications/MAMP/htdocs/databases/test.php";
    NSURL *url = [NSURL URLWithString:myphp];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    [request setPostValue:msg forKey:@"message"];
    [request startAsynchronous];
}

@end

Answer 1

All else aside, your request is never executed. Make sure to invoke startSynchronous or startAsynchronous on the request object. Please consider reading the “How To use it” guide to ASIHTTPRequest.