Send an HTTP GET request with query string values.

http-query-string.m

- ( NSString * ) encodeDictionary : ( NSDictionary * ) parameters
{
    NSMutableString * query;
    
    query = [[NSMutableString alloc] init];
    
    [parameters enumerateKeysAndObjectsUsingBlock : ^( id key, id value, BOOL *stop ) {
        [query appendFormat : @"%@=%@&", key, value];
    }];
    
    return [query substringToIndex : ( [query length] - 1 )];
}

- ( NSString * ) loadFileHTTPGetQueryString : ( NSString * ) url withQueryStringParameters : ( NSDictionary * ) parameters
{
    NSData * get;
    NSError * error;
    NSHTTPURLResponse * response;
    NSMutableString * location;
    NSMutableURLRequest * request;
    NSString * contents;
    NSString * query;
    
    // Form query string
    query = [self encodeDictionary : parameters];
    NSLog( @"%@", query );
    
    location = [[NSMutableString alloc] init];
    [location appendFormat : @"%@?%@", url, query];
    NSLog( @"%@", location );
    
    // Load a file over HTTP GET
    request = [[NSMutableURLRequest alloc] init];
    [request setHTTPMethod : @"GET"];
    [request setURL:[NSURL URLWithString : location]];
    
    error = [[NSError alloc] init];
    
    response = nil;
    
    get = [NSURLConnection sendSynchronousRequest : request returningResponse : &response error : &error];
    
    if( [response statusCode] != 200 )
    {
        NSLog( @"Error making HTTP request: %@", error );
    } else {
        contents = [[NSString alloc] initWithData : get encoding:NSUTF8StringEncoding];
        NSLog( @"Query string response: %@", contents );
    }
    
    return contents;
}