NSMutableURLRequest+Parameters.m

//
//  NSMutableURLRequest+Parameters.m
//
//  Created by Jon Crosby on 10/19/07.
//  Copyright 2007 Kaboomerang LLC. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.


#import "NSMutableURLRequest+Parameters.h"


@implementation NSMutableURLRequest (OAParameterAdditions)

- (NSArray *)parameters 
{
    NSString *encodedParameters;
	BOOL shouldfree = NO;
    
    if ([[self HTTPMethod] isEqualToString:@"GET"] || [[self HTTPMethod] isEqualToString:@"DELETE"]) 
        encodedParameters = [[self URL] query];
	else 
	{
        // POST, PUT
		shouldfree = YES;
        encodedParameters = [[NSString alloc] initWithData:[self HTTPBody] encoding:NSASCIIStringEncoding];
    }
    
    if ((encodedParameters == nil) || ([encodedParameters isEqualToString:@""]))
	{
		if (shouldfree) 
		{
			[encodedParameters release];
		}
		return nil;
	}
    
    NSArray *encodedParameterPairs = [encodedParameters componentsSeparatedByString:@"&"];
    NSMutableArray *requestParameters = [[NSMutableArray alloc] initWithCapacity:16];
    
    for (NSString *encodedPair in encodedParameterPairs) 
	{
        NSArray *encodedPairElements = [encodedPair componentsSeparatedByString:@"="];
        OARequestParameter *parameter = [OARequestParameter requestParameterWithName:[[encodedPairElements objectAtIndex:0] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]
																			   value:[[encodedPairElements objectAtIndex:1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
        [requestParameters addObject:parameter];
    }
    
	// Cleanup
	if (shouldfree)
		[encodedParameters release];
	
    return [requestParameters autorelease];
}

- (void)setParameters:(NSArray *)parameters 
{
    NSMutableString *encodedParameterPairs = [NSMutableString stringWithCapacity:256];
    
    int position = 1;
    for (OARequestParameter *requestParameter in parameters) 
	{
        [encodedParameterPairs appendString:[requestParameter URLEncodedNameValuePair]];
        if (position < [parameters count])
            [encodedParameterPairs appendString:@"&"];
		
        position++;
    }
    
    if ([[self HTTPMethod] isEqualToString:@"GET"] || [[self HTTPMethod] isEqualToString:@"DELETE"])
        [self setURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@?%@", [[self URL] URLStringWithoutQuery], encodedParameterPairs]]];
    else 
	{
        // POST, PUT
        NSData *postData = [encodedParameterPairs dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
        [self setHTTPBody:postData];
        [self setValue:[NSString stringWithFormat:@"%d", [postData length]] forHTTPHeaderField:@"Content-Length"];
        [self setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    }
}

@end