Adding missing files.

.gitignore

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+XAuthTwitterEngineDemo/build/*
+*.pbxuser
+*.perspectivev3

XAuthTwitterEngineDemo/Libraries & Headers/ExchangeCredentialsOperation.h

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+//
+//  ExchangeCredentialsOperation.h
+//  XAuthTwitterEngineDemo
+//
+//  Created by Aral Balkan on 10/03/2010.
+//  Copyright 2010 Naklab. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "ExchangeCredentialsOperationDelegate.h"
+
+@class OAConsumer;
+
+@interface ExchangeCredentialsOperation : NSOperation {
+	OAConsumer	*_consumer;
+	NSString *_username;
+	NSString *_password;
+
+	id <ExchangeCredentialsOperationDelegate> _delegate;
+}
+
+@property (nonatomic, retain) OAConsumer *consumer;
+@property (nonatomic, retain) NSString *username, *password;
+@property (nonatomic, assign) id <ExchangeCredentialsOperationDelegate> delegate;
+
+@end

XAuthTwitterEngineDemo/Libraries & Headers/ExchangeCredentialsOperation.m

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+//
+//  ExchangeCredentialsOperation.m
+//  XAuthTwitterEngineDemo
+//
+//  Created by Aral Balkan on 10/03/2010.
+//  Copyright 2010 Naklab. All rights reserved.
+//
+
+#import "ExchangeCredentialsOperation.h"
+#import "OAMutableURLRequest.h"
+#import "OARequestParameter.h"
+#import "OADataFetcher.h"
+
+@implementation ExchangeCredentialsOperation
+
+@synthesize consumer = _consumer;
+@synthesize username = _username, password = _password;
+@synthesize delegate = _delegate;
+
+- (void)main
+{
+	// This is running in its own thread: create an autorelease pool.
+	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];		
+
+
+	//
+	// Modified from http://github.com/norio-nomura/ntlniph/commit/5ce25d68916cd45254c7ff2ba9b91de4f324899a
+	// Courtesy of Norio Nomura (@norio_nomura) via Steve Reynolds (@SteveReynolds)
+	//
+	// Carry out the xAuth, using the OAuthConsumer library directly.
+	//
+	NSURL *url = [NSURL URLWithString:@"https://api.twitter.com/oauth/access_token"];
+
+	OAMutableURLRequest *request = [[OAMutableURLRequest alloc] initWithURL:url
+																   consumer:self.consumer
+																	  token:nil   // we don't have a Token yet
+																	  realm:nil   // our service provider doesn't specify a realm
+														  signatureProvider:nil] ; // use the default method, HMAC-SHA1
+
+	[request setHTTPMethod:@"POST"];
+	[request setParameters:[NSArray arrayWithObjects:
+							[OARequestParameter requestParameterWithName:@"x_auth_mode" value:@"client_auth"],
+							[OARequestParameter requestParameterWithName:@"x_auth_username" value:self.username],
+							[OARequestParameter requestParameterWithName:@"x_auth_password" value:self.password],
+							nil]];
+
+
+	OADataFetcher *dataFetcher = [[OADataFetcher alloc] init];
+	DLog(@"HERE HERE HERE");
+	[dataFetcher fetchDataWithRequest:request delegate:self didFinishSelector:@selector(setAccessToken:withData:) didFailSelector:@selector(accessTokenTicket:didFailWithError:)];
+	[dataFetcher release];
+	DLog(@"HERE HERE HERE");
+
+	[request release];	
+	DLog(@"HERE HERE HERE");
+
+	[pool drain];
+	DLog(@"HERE HERE HERE");
+}
+
+//
+// Access token fetch failed.
+//
+- (void) accessTokenTicket:(OAServiceTicket *)ticket didFailWithError:(NSError *) error {
+	NSLog(@"access token did fail ***************");
+
+	[self performSelectorOnMainThread:@selector(callDelegateOnMainThreadWithAccessTokenTicket:didFailWithError:) withObject:error waitUntilDone:[NSThread isMainThread]];	
+}
+
+- (void) callDelegateOnMainThreadWithAccessTokenTicket:(OAServiceTicket *)ticket didFailWithError:(NSError *) error {
+	[self.delegate accessTokenTicket:ticket didFailWithError:error];
+}
+
+//
+// access token callback
+// when twitter sends us an access token this callback will fire
+// we store it in our ivar as well as writing it to the keychain
+//
+
+- (void) setAccessToken: (OAServiceTicket *) ticket withData: (NSData *) data {
+	NSLog(@"£$@£$£@$@£$£@");
+	if (!ticket.didSucceed || !data) 
+	{
+		[self accessTokenTicket:ticket didFailWithError:nil];
+		return;
+	}
+
+	NSString *dataString = [[[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding] autorelease];
+	if (!dataString)
+	{
+		[self accessTokenTicket:ticket didFailWithError:nil];		
+		return;
+	}
+
+	[self performSelectorOnMainThread:@selector(callDelegateOnMainThreadWithSetAccessTokenFromTokenString:) withObject:dataString waitUntilDone:[NSThread isMainThread]];
+}
+
+- (void) callDelegateOnMainThreadWithSetAccessTokenFromTokenString: (NSString *)tokenString
+{
+	[self.delegate setAccessTokenFromTokenString:tokenString];
+}
+
+
+@end

XAuthTwitterEngineDemo/Libraries & Headers/ExchangeCredentialsOperationDelegate.h

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+@class OAServiceTicket;
+
+@protocol ExchangeCredentialsOperationDelegate
+
+- (void) setAccessTokenFromTokenString:(NSString *)tokenString;
+- (void) accessTokenTicket:(OAServiceTicket *)ticket didFailWithError:(NSError *) error;
+
+@end